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revision 1.76 by jmc, Fri Jul 12 14:52:08 2002 UTC revision 1.766 by jmc, Tue Jan 16 19:45:13 2007 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
8     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
9     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
10     - still needs work (not working with some options ; efficiency to improve)
11       and serious testing.
12     - use this scheme for temperature & salinity in 2 advection test exp.:
13       advect_xy & advect_xz, respectively.
14    
15    checkpoint58u_post
16    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
17    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
18    o testreport: add option "-skipdir" to skip some test.
19    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
20      momentum calculation.
21    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
22    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
23      remove checkpoint.F and the_correction_step.F (no longer used);
24      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
25    o add option (linFSConserveTr) to correct for tracer source/sink due to
26      Linear Free surface
27    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
28    o pkg/thsice: fix reading mnc-pickups
29    
30    checkpoint58t_post
31    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
32    o pkg/mdsio:
33     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
34       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
35       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
36     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
37     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
38       either MDS_READ_FIELD or MDS_WRITE_FIELD )
39     - new S/R (to replace MDSWRITEMETA), which allows to write more
40       informations (variable names, time ...) to meta files.
41     - modify rdmds.m to give back the meta file content.
42    o pkg/diagnostics: change vertical interpolation to be safer, and more
43       flexible (define p-levels to interpolate to in data.diagnostics);
44      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
45       diagnostic pointer.
46    o pkg/seaice: more cleaning up of seaice_growth, added many comments
47    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
48    o fix multi-category seaice:
49     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
50       SEAICE_MULTICATEGORY
51     - fix short wave heat flux
52    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
53       and allow to use EVP solver. Change forward lab_sea: test both EVP
54       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
55    o Initial check-in of lab_sea adjoint
56      (very similar to natl_box_adjoint/code_seaice)
57      * used C-grid and EVP solver
58      * used KPP, GM/Redi
59      * uses inAdExact=.TRUE.
60      * gradient checks fail for both ADM and TLM
61        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
62        f.d. gradients actually seem more problematic than ADM, TLM gradients;
63        issue is related to forward mismatch between g77 an ifort
64    o pkg/seaice: overhaul of thermodynamics
65     - growth.F and groatb.F are replaced by new routine seaice_growth.F
66     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
67     - move a few global fields out of SEAICE.h into seaice_growth.F and
68       make them 2D (FICE/QNETO/ ...)
69     - remove FO (it is the same as QNETO)
70     - introduce a few local fields to avoid modifying external fields such
71       as atemp, etc.
72    
73    checkpoint58s_post
74    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
75      changed exf_set_gen.F so that
76        genperiod=0 means input file is one time-constant field and
77        genperiod=-12 means input file contains 12 monthly means
78    o CG2D: use pre-computed solver main-diagonal (stored in common block);
79      this affects truncation error ; generate new output file for exp. which
80      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
81        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
82        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
83        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
84        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
85        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
86    o start implementation of deep-atmosphere and anelastic formulation
87    o verification: remove 2nd copy of input files and use script "prepare_run"
88      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
89    o mom_common/vecinv/fluxform: fix a few initialisation isssues
90    o profiles: fix for multithreaded case
91    
92    o diagnostics: rename few diags:
93      s/'PRESSURE'/'RCENTER '/g
94      s/'TICE    '/'oceFreez'/g
95      s/'TAUX    '/'oceTAUX '/g
96      s/'TAUY    '/'oceTAUY '/g
97      s/'SWFLUX  '/'oceQsw  '/g
98      s/DIFx/DFxE/g
99      s/DIFy/DFyE/g
100      and add few ocean-forcing diagnostics:
101      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
102    o modifications to pkg/seaice/growth.F and budget.F, which change results of
103      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
104      as actual snow thickness.  It now refers everywhere to effective snow
105      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
106    
107    checkpoint58r_post
108    o modifications to pkg/seaice/growth.F, which change results of
109      lab_sea experiment: fixes pertain to melting snow over open water, to
110      masking EVAP under sea ice, and to using the correct AREA variable for
111      computations of EVAP, PRECIP, HSNOW, and GHEFF
112    o add ability to read bathy, salt, and theta using MNC (off by def)
113    o add flooding algorithm and advection of HSNOW for pkg/seaice;
114      both are turned off by default and do no change any results
115    o seaice advection with pkg/thsice: a step toward the use of non-linear
116      advection scheme, but #ifdef or commented out for now (requires more EXCH).
117    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
118      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
119      in natl_box (affects results @ truncation level: update output.txt)
120    o multi-threading and IO:
121      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
122      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
123        (needed to work with SingleCpuIO): tested in all verif. exp.
124    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
125      affects the results (but none of the verification test uses this scheme).
126    o Adding some pkg/diagnostics capability to pkg/seaice
127      (will certainly be subject to changes)
128    o ctrl: adding new control variables:
129      lwflux, lwdown, evap, snowprecip, apressure, runoff
130    
131    checkpoint58q_post
132    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
133      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
134      high_res_cube configuration by 4% on Columbia.
135    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
136      add (in global_with_exf/code) a version of EXF_INTERP_READ without
137      dynamical allocation (seems to work in multi-threaded).
138    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
139      single CPU io) so that TAF does not have to see EESUPPORT.h
140    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
141    
142    checkpoint58p_post
143    o obcs: stop if obcs is used with useCDscheme = .true.
144    o shelfice:
145     - fix a sign error so that no slip at shelfice interface works
146     - remove stop for combination non-hydrostatic code and shelfice. That does
147       not mean, that the results are correct, but at least they are numerically
148       stable
149    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
150    o added adjoint exch routined for all exch*3d* routines
151      and updated flow directives
152    
153    checkpoint58o_post
154    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
155      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
156    o change controling S/R for writing pickup file (new S/R do_write_pickup)
157      and clean-up reading/writing of pickup files.
158    o fix local version of read/write pickup (NH part) in rotating_tank/code
159    o simplify EXCH interface:
160     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
161     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
162    o added the regrid package
163    o shelfice:
164     - add a simple boundary layer scheme to reduce noise
165     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
166    
167    checkpoint58n_post
168    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
169       local variable (not in common block).
170    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
171      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
172      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
173        to work with SingleCpuIO.
174    o add "_d 0" to real constant of pkg/cfc subroutines ;
175       update exp. cfc_exemple & tutorial_cfc_offline output files.
176    o multi-threading and IO:
177      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
178        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
179      - barrier before and after reading.
180      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
181      - avoid using MDS_WRITELOCAL for LAND pkg output.
182      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
183        common-block variables ; Allows multi-threading with master-thread IO.
184    o change default MAX_NO_THREADS from 32 to 4 ;
185      and stop cleanly when MAX_NO_THREADS is too small.
186    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
187    
188    checkpoint58m_post
189    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
190       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
191    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
192       keep global_ocean.90x40x15 (for AD testing) with former secondary test
193       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
194    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
195        add MITgcm_tutorials (= code + all the tutorials)
196    o ecco, option to compute cost for total ssh (mean+anom)
197    o consistent with addition of ptracer and ssh in pkg/profiles
198    o profiles: adding ptracer and ssh
199    o testreport: change multi-test output-file name
200      (from output.txt.{name} to output.{name}.txt)
201    o profiles: now ok for mutli-tiles case
202    o seaice: add 4 parameters for different advection schemes for area,
203      (effective) seaice thickness, enthalphy, and snow height. Their default
204      is the standard parameter SEAICEadvScheme
205    o calc_gw:
206     - add cosFacU in zonal viscous flux (harmonic.visc.).
207     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
208       of tutorial_plume_on_slope.
209    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
210    o calc_gw: true flux-form, account for horizontal grid spacing.
211      update rotating_tank results, but not plume_on_slope (affected at
212      truncation level, 11 digits).
213    
214    checkpoint58l_post
215    o calc_gw:
216     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
217     - remove side-drag for now (need to fix it); update plume_on_slope results.
218     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
219    o commit code to make SST/SSS weights spatially variable
220      (based on either variable in-situ or variable initial T/S weights)
221    o pkg/ecco:
222      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
223        now based on horizontally varying weights wthetaLev, wsaltLev
224      * cost_averagesflags now returns year indices in addition to day, month
225      * sflux balance is performed on annual basis
226        (sflxumm, sfluxmm2, bal_sfluxmm)
227      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
228        including separate counting and multipliers
229    o pkg/rbcs
230      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
231    
232    checkpoint58k_post
233    o testreport:
234     - always build in dir. "build" (if not there, mkdir build instead of building
235       & running in input)
236     - run in dir run (if it exists), in build otherwise.
237     - call prepare_run (if input/prepare_run exists)
238     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
239    o pkg/exf modifications to interpolation and rotation routines for more
240       reasonable treatment of North Pole singularity: for tracers North Pole
241       value is set to northernmost zonal-mean value, for zonal velocity it is
242       set to zero, and for meridional velocity it is set to northernmost value.
243    o pkg/exf/exf_check_range.F
244     - add tile index to diagnostics and move stop statement to the very
245       end of the routine.
246    o pkg/diagnostics: (diagnostics_main_init.F)
247      define title of isomorphic variables according to the current config.
248    o pkg/thsice with pkg/seaice dynamics:
249    - fix domain of computation (interior only, required for exf) and do exchanges
250    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
251    o towards a standard way of dealing with multi-threading in MONITOR
252      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
253    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
254       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
255    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
256    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
257    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
258       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
259    o tracer advection:
260     - clean-up and simplify calc_common_factors.F
261     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
262       advection subroutine (but still not used within DST advection S/R)
263    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
264    
265    checkpoint58j_post
266    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
267      from file (collects calls previously in FORWARD_STEP)
268    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
269    o adjoint store dir. adjusted accordingly
270    o genmake2
271      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
272    
273    checkpoint58i_post
274    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
275      on wind stress (SEAICEstressFactor defaults to 1.)
276    o Total number of Timers is finite (<=40): comment out 2 non-essential one
277      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
278    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
279      on CS-grid: no longer loosing mass.
280    o exf & curvilinear-grid: no longer modify longitude xC & xG.
281    o pkg/ggl90: fix sloppy output and fix a bug
282    o pkg/seaice: added SEAICEuseEVPpickup parameter
283      - Set to false in order to start EVP solver with
284        non-EVP pickup files when using SEAICEuseEVP
285      - fix sign error in diffusion in seaice_calc_rhs
286    
287    checkpoint58h_post
288    * Modifications for bottom topography control
289      o replace hFacC by _hFacC at various places
290      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
291      o add non-self-adjoint cg2d_nsa
292      o update autodiff support routines
293      o re-initialise hfac after ctrl_depth_ini
294      o works for 5x5 box, doesnt work for global_ocean.90x40x15
295    * Adding verification for 5x5 box (4-layer) bottom topography control
296    
297    checkpoint58g_post
298    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
299       used for mean seasonal cycle, mean diurnal cycle); add an example
300       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
301    o pkg/ggl90:
302      - add parameter (minimum surface kinetic energy)
303      - fix bug (avoiding division by zero)
304    o couple pkg/thsice to pkg/seaice:
305      - modify advection in seaice to accomodate new scalar fields to be advected
306      - only muliDimAdection scheme work with seaice/thsice
307      - mapping of thsice-variables to seaice-variables, back and forth
308      - does not break the verification experiments, but does not give the
309        desired results either
310    o pkg/seaice
311      - make (default) second order advection a bit less confusing?
312    
313    checkpoint58f_post
314    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
315      to pkg/seaice):
316      - new routines thsice_map_exf and thsice_get_exf provide the interface
317      - add an additional formal parameter to thsice_solve4temp
318    o pkg/exf:
319      - add new fields wspeed, snowprecip (to be able to couple to thsice)
320      - correct Stefan-Boltzmann constant
321      - new parameter for longwave surface emittance
322      - separate some stuff from exf_bulkformulae into new routines  
323        exf_radiation, exf_wind
324      - add new parameters and constants: longwave emissivity for ocean, ice
325        and snow, evaporation parameters over ice
326      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
327        either wind from stress or stress from wind
328    o pkg/thSIce:
329    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
330    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
331       and THSICE_CALC_THICKN
332    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
333    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
334      to make debugging easier.
335    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
336    o pkg/bulk_force:
337      - clean-up comments and parameters ;
338      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
339    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
340      generate new output for test-experiment: aim.5l_cs.thSI
341    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
342      testreport accordingly
343    
344    checkpoint58e_post
345    o SEAICE_CGRID adjoint done
346    o R_STAR adjoint implemented.
347      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
348      * need to sort out init. of h0facc, etc.
349    o Make pkg/profile fully independent of ecco,cost, etc. stuff
350      to be able to use it in pure forward.
351    
352    checkpoint58d_post
353    o upgrade simple test-experiment to tutorial example:
354     step.1: duplicate the experiment and (step.2) will remove the old copy.
355      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
356      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
357      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
358      tutorial_global_oce_biogeo    <- copy of dic_example
359      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
360      tutorial_plume_on_slope       <- copy of plume_on_slope
361      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
362      tutorial_global_oce_optim     <- empty for now (David ?)
363      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
364     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
365    o correct a sign problem in cost_scat.F
366    o obcs and ptracers: fix boundary conditions for advections schemes
367      with larger stencil
368    o thsice adjoint: start
369    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
370      completeness
371    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
372      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
373    o ptracers adjoint:
374      * avoid extensive recomputatations
375      * fix missing re-init. of gptr (missed by TAF)
376    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
377      me to turn off the excessive output to STDOUT that this package produces
378    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
379      and add those terms in Vector-Invariant formulation.
380    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
381      if the control period (xx_hfluxperiod etc) is 0
382    o in profiles pkg, clean routines and fix details
383    o in ecco pkg, reading ssh data:
384      fix problem in case the model does not start at iter0=0
385    o fix mnc-pickup/restart for ptracers
386    o new package prifiles:
387      code to compute profile-based cost by Gael Forget
388      (modifs in ecco, ctrl, autodiff)
389    o Benign bug fix in initialization (spotted by M. Mazloff) of
390      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
391    
392    checkpoint58c_post
393    o adjoint: finish NLFS adjoint and provide reference output in
394      verification/global_ocean.90x40x15/results_ad_nlfs
395    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
396      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
397      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
398      with SEAICE_CGRID defined.
399    o move calendarDumps from "data" to "data.cal" and clean-up the code
400      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
401    o add useEXF & useCAL flags (for now, set in hard-coded way)
402    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
403      (were missing in NH mode, and wrong in quasihydrostatic mode).
404      waiting for Chris updated version of calc_gw to add those CALLs.
405    o fix bug in quasihydrostatic S/R ;
406      add a test for this option: global_ocean.90x40x15.qshyd
407    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
408      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
409    o add on/off flag useOffLine for package OFFLINE
410    o seaice:
411      - modify advection so that it works also on the C-grid
412      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
413        problem in multi-tile runs with C-grid
414      - add flags for clipping ice velocities and/or masking solver forcing
415      - fix drag (ocean on ice) formulation and a bug that caused noise in the
416        C-grid solver
417      - added a few comments to seaice_diffusion.F
418      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
419        are now exclusive)
420      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
421        required re-ordering the code a little:
422       + make DAIRN global variable (defined in SEAICE)
423       + move computation of the viscosities eta and zeta into a new separate
424         routine (because I need to recompute them in seaice_ocean_stress.F)
425    
426    checkpoint58b_post
427    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
428      update output.txt of exp. aim.5l_cs.thSI
429    o various mnc cleanups and improvements:
430      + shrink lookup tables by factor of ~4
431      + better error reporting when running out of lookup space
432      + able to handle longer path/file names (up to 500 chars)
433    o adjoint:
434      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
435      - TBD: "hidden" mom_vecinv recomp. in dynamics
436    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
437     (allow to differentiate between forcing components using new integer flags:
438      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
439     and add new flag to put Dissipation tendency out of Adams-Bashforth.
440    o ecco
441      - enable trend removal from SSH anomaly obs.
442    o adjoint
443      - a fix for PmEpR when #undef EXACT_CONSERV
444      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
445      - try to fix "hidden" recomp. in forward_step for NLFS
446        (NLFS seems broken sometimes after I checked it in)
447    o seaice:
448     - add c-grid version of the dynamic solver:
449       + three new routines that are the c-grid substitute lsr, dynsolver
450         and ostres
451       + put a few fields that were local to dynsolver into global common
452         blocks, so that I can move the computation of stresses etc into
453         seaice_lsr (saves coding but may break the adjoint).
454     - replace more hardwired parameters by runtime parameters
455     - add ice masks that mask the rhs of the implicit solvers where there
456       is no ice (commented out in seaice_dynsolver, because i am not sure
457       if this works properly), eventually this should replace the clipping
458       of ice velocities in seaice_dynsolver to +/-40cm/s.
459    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
460      include it only where its needed
461    o move balancing of fluxes before the call of external_forcing_surf
462    o seaice:
463      - correct units of turning angles (now they are really in degrees)
464      - move computation of GWATX/Y out of main routine into dynsolver
465      - initialize GWATX/Y in seaice_init
466    o Apply mask on Fresh-Water flux (needed for SSH forcing).
467      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
468    o seaice: add runtime flags for turning angles (default to zero)
469    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
470      and trend from exf forcing and ctrl control adjustments
471    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
472      (since checkpoint57x_post)
473    o change the default rotation period to 86164.s = the Earth rotation
474    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
475      and based on a reference stratification. Tested within hs94.cs-32x32x5.
476    o seaice advection: add code for choosing between the default (2nd order
477      central differences) and multiDim advection schemes provided by
478      pkg/generic_advdiff
479    o seaice:
480      - removed all references to SEAICE_GRID.h fields from
481        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
482        (cubed-sphere configuration will change a little)
483      - grid computations in seaice_init are obsolete now.
484      - cleaned up code a little so that is easier to read (hopefully).
485      - added new (better?) discretizations of default advection and diffusion
486        (turn on with SEAICEuseFluxForm)
487      - replace 1 in 3d global fields by kSurface in growth.F
488      
489    checkpoint58a_post
490    o seaice:
491      - bug fix in advect.F
492    o shelfice:
493      - separate shelfice load anomaly from pload (breaks with time
494        dependent forcing), => introduce constant field shelficeLoadAnomaly.
495        Its default is 0., but it may be computed more cleverly from (unknown)
496        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
497        done offline. A good approximation of the pressure load anomaly is
498        necessary to avoid large initial adjustment processes underneath
499        deep-reaching shelfice.
500      - small fix in ISOMIP shelfice_thermodynamics
501      - add more sophisticated thermodynamics of Hellmer (1989), this is
502        now the default
503      - give a few constants more intuitive names
504    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
505      if bulk formulae are used in long integration (especially EmPmR). Turn
506      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
507      if balancePrintMean, the imbalance that is substracted is printed to
508      STDOUT.
509    o fix bug (typo) in obcs_apply_eta.F
510    o add a new package shelfice which enables us to model the circulation
511      underneath shelf-ice with draughts of hundreds of meters.
512     - works
513     - to do: + include improved thermodynamics
514              + check whether kSurfC (from model/inc/SURFACE.h) can be used
515                instead of new field kTopC
516              + can we use topoFile, Ro_surf and existing code in ini_depth.F
517                instead of new field R_shelfIce and new code in ini_depth.F
518                and ini_mask_etc.F?
519              + adjust vertical mixing schemes?
520    o seaice pkg:
521     - add a cpp-flag to include a simple formula for a salinity dependent
522       freezing point of sea water at the surface
523     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
524       meridional stresses are now different (and hopefully correct)
525    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
526       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
527       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
528    o pkg/diagnostics: add options and parameters for regional-statistics
529       diagnostics ; define regions by reading a region-mask from a file
530       (might add other options later)
531    o pkg/bulk_force:
532     - add option and parameters to use AIM surface-flux formulae.
533     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
534       others forcing fields (defined in PARM05, parameter file "data") are loaded
535       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
536     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
537     - use the right EXCH call for uwind,vwind (to work on CS-grid).
538     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
539       and parameters (note: calcWindStress replaces .NOT.readwindstress).
540     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
541    
542    checkpoint58
543    o add "--embed-source" option to genmake2 which, when the supporting
544      tools can be compiled (as determined by genmake2) will turn on the
545      embed_files package which then embeds the entire MITgcm source code
546      (*.[fFhc] + Makefile) used for the build within the executable
547      - requested by CNH but off by default
548      - adds a paltry <9MB to the mitgcmuv executable in most cases
549      - only writes the output when useEMBEDSRC in eedata is true
550    o clean up 3-dim. relaxation codes:
551      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
552      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
553      * Thanks to Tom Haine for testing!
554    
555    checkpoint57z_post
556    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
557      affects output (@ truncation level) of exp. plume_on_slope ; updated.
558    o fix the pickup behavior for obcs in combination with ptracers
559    o fix a bug in ptracers_external_fields_load
560    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
561      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
562    o transfered surface NH pressure to eta field (if exactConserv).
563    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
564         and update lab_sea output.txt file.
565    o completing 3-dim. relaxation code: additional term
566         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
567      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
568      * At compile time, in "EXF_OPTIONS.h" set
569          #define  ALLOW_CLIMTEMP_RELAXATION
570          #define  ALLOW_CLIMSALT_RELAXATION
571      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
572          tauThetaClimRelax3Dim = 15552000.0,
573          tauSaltClimRelax3Dim  = 15552000.0,
574      * 3 cases:
575          1) Use a constant-in-time 3-dim. field
576          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
577          3) Real-time relax. to time-evolving prescribed field
578    o Adding Laplacian-type smoothness constraint on
579      initial and boundary (forcing) controls (ic, bc)
580      * enable at compile-time via
581        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
582      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
583      * Absolute scale somewhat unclear so far
584      * no area weighting was included since no other cost term does so far
585    
586    checkpoint57y_post
587    First step for a NLFS adjoint
588    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
589    o new init. routines for calc_r_star, calc_surf_dr
590    o still need to deal with ini_masks_etc
591    o testreport seemed happy
592    checkpoint57y_pre
593    
594    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
595    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
596    o add new offset feature to offline pkg (plus minor cleanup)
597    o cfc fixes for final year of integration
598    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
599      be in GCHEM_OPTIONS).
600    
601    checkpoint57x_post
602    o fix testreport Pb in multiple test experiment.
603    o cleanup our namelist syntax in verification:
604      - make it more F95 standards compliant (some work still needed)
605      - allows the vast majority of our tests to work with gfortran
606    o Non-Hydrostatic:
607     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
608     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
609    o Allow to apply AB on T,S rather than on AB(gT,gS):
610     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
611     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
612       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
613     - need a "clever" read_pickup to restart from the other AB formulation
614    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
615    o remove some unused variables (reduces number of compiler warnings)
616    o adjoint
617      * Disable useVariableViscosity for adjoint for time being
618        (there are a number of extensive recomputations)
619      * Initialize certain variables needed for adjoint
620    
621    checkpoint57w_post
622    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
623                 fix the singleCpuIO RS version of MDSWRITEFIELD
624       and add a WARNING if using globalFiles=T with multi-processors.
625    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
626      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
627    o tracer advection scheme:
628      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
629       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
630       was not very convenient).
631      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
632       (further tests needed for the implicit DST & Flux-Limiter schemes).
633    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
634      and sRef for convenience, handy, when you want to initialize
635      ptracers in a large domain with a constant non-zero value. Also,
636      untangle ptracers_init.F a little.
637    
638    checkpoint57v_post
639    o change dome exp. to use variable viscosity in side-drag terms.
640    o remove all the files from the cfc_offline test since they are now
641      incorporated into tutorial_cfc_offline which has been producing
642      identical results for a few days of testing
643    o add new parameter: sideDragFactor to enable half-slip-side BC
644      and change side-drag S/R to use viscosity from mom_calc_visc
645      (can switch back by setting sideDragFactor=0.); affects results at
646      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
647       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
648    o vorticity & strain are now computed without masking, to account for
649      no-slip-side BC in variable viscosity calculation ; mask is applied
650      anyway later on, before computing advection/coriolis terms.
651    o modify exp4 to test new obcs support for reading from external files
652      and for passive tracers
653    o fix behavior of ptracers_monitor when monitor output is written to a
654      netcdf-file; still not independent of monitor.F (writes in the same
655      file).
656    o change default value of tRef (put a uniform, meaningful value for ocean
657      & atmos) and initialize sRef (was missing, as Martin mentioned).
658    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
659      to be proportional to enstrophy dissipation length.  Thus,
660       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
661      This is now consistent with Smagorinsky and with the manual.
662    
663    checkpoint57u_post
664    o OBCS and PTRACERS: add open boundary support for passive tracers
665      - either use homogenous (pseudo) v.Neumann conditions or prescribe
666        OB-values from file; this is not different from the way theta and salinity
667        are treated
668      - however, Orlanski-radiation conditions are not supported, and the model
669        will stop if you use pTracers and Orlanski at the same time.
670      - beefed up the rountine obcs_external_fields_load: now only those open
671        boundary values are overwritten with values from files for which there
672        are really files, otherwise the OB-fields remain untouched. This makes
673        it possible to use different OBs at different ends of the domain (as
674        with EXF)
675    o reduce number of exch calls in shap_filt (s2).
676    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
677      truncation level) 4/5 MLAdjust test results (11&12 digits match).
678    
679    checkpoint57t_post
680    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
681    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
682      same truncation, independent of the face number: affects affects several
683      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
684    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
685      note that biharmonic viscosity + no-slip was not tested in any experiment.
686    o fix bug in non-linear free-surf side-drag ; generate new output for
687      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
688    o make mnc honor the writeBinaryPrec flag for most kinds of output
689    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
690    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
691      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
692    o add brackets in multi-terms sum to get same truncation, independent of
693      the face number (manage to get exactly same value of gU,gV at the cs-edge)
694      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
695    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
696      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
697      a maximum grid-scale Reynolds number.  Also, changes all length calculations
698      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
699      Suggested values of viscosity parameters found in mom_calc_visc.
700      Many new viscosity diagnostics available.
701    
702    checkpoint57s_post
703    o Add clearing-house for viscosity calculations, mom_calc_visc and
704      correct numerous bugs in LeithD and Smagorinsky discretizations.  
705      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
706      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
707      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
708      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
709      The Strain-Tension form is now called with useStrainTensonVisc=.true.
710      ViscAhStrain and viscAhTension are now retired.
711    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
712    o In response to JMC's bug report, genmake2 now ignores any soft-links
713      that it finds in the *current* directory when searching for files.
714      Soft-links found in any other source directories will still work as
715      they did before.
716    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
717      a C routine to unlimit the stack size
718    o mnc-ify pkg/aim snapshot vars
719    o mnc-ify pkg/land as requested by Daniel
720    o various changes to mnc including:
721      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
722      - output can now be grouped so that all files within a group
723          change the ITER portion of their names in lock-step together
724      - can now read ("global") PER-FACE (in addition to PER-TILE) files
725          and works with both EXCH1 and EXCH2 (but needs more testing)
726      - writing works for all verification test cases w/ g77 on Linux
727    
728    checkpoint57r_post
729    o make MNC variable initialization happen earlier
730    o add diagnostics for (almost) each term of the momentum Eq.
731    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
732    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
733    o remove MINIMAL_TAVE_OUTPUT option ;
734      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
735    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
736      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
737    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
738    o add time-dependent SST, SSS control
739    o cost terms in ecco/ modularized (new cost_generic.F)
740    o cost_averages routines are modularized (new cost_averagesgeneric.F)
741    o new infrastructure for seaice model vs. obs misfits in seaice/
742      * driver from the_main_loop.F is seaice_cost_driver.F
743      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
744      * gradient check in Exp. 6a of natl_box_adjoint/
745    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
746      (see README file)
747    
748    checkpoint57q_post
749    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
750    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
751      - bug was reported by Jean-Michel and Ian Fenty
752    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
753      update exp. cpl_aim+ocn output.
754    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
755      Needed for high-res. runs with large global files
756      to be able to limit tapelev size
757    o Changed some tests for adjoint:
758      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
759      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
760      * global_ocean.90x40x15/ back to default 3-level checkpointing
761    o Modifications to enable scripted COMMON to MODULE conversion
762      * verification/OpenAD/code/ has necessary scripts and description;
763      * converts, compiles and runs successfully;
764    
765    checkpoint57p_post
766    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
767    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
768      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
769    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
770    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
771      (was already the case for dissipation with mom_vecinv,
772       and also the case for grad.PhiHyd when staggered-timeStep)
773      This will allow to put dissipation out-off the AB time-stepping.
774     Unfortunately, affects truncation error. Update output of exp. that "fails"
775      (cg2d matching number) and leave the others for later: front_relax(10),
776      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
777      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
778    
779    checkpoint57o_post
780    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
781      (2) its ready to be documented during the 20050801 DocFest
782    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
783      for ideal_2D_oce and lab_sea on linux_ia32_g77
784    o set to #undef CTRL_SET_OLD_MAXCVARS_30
785      in global1x1_tot/code_seaice_adj to access indices 32, 33
786      (worth another tag)
787    
788    checkpoint57n_post
789    o adding precip control xx_precip 32
790    o adding swflux control xx_swflux 33
791    o Replacing 10 forcing penalty cost routines by 1 generic.
792    o Implementing partitioning in time-mean and variable adjustment
793      for atmos. state.
794    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
795    o in natl_box_adjoint:
796      * updated exp 1 to 10
797        (but does not have time-mean vs. variable split results yet)
798    o updated global1x1/*_seaice_adj/
799      to incorporate latest changes
800    o enable useSingleCpuIO for mdsio vector routines
801      (applies in particular to tapelev I/O)
802    o removed inefficient K-loop in all active_file*control*.F
803    
804    checkpoint57m_post
805    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
806      and advect_cs (use EXCH-2 and standard cs-32 grid files).
807    o pkg/exch2: filling of face-corner halo regions is optional
808      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
809    
810    checkpoint57l_post
811     tag before updating tutorials (pre-release-2)
812    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
813       for output and interpolation of input fields onto model grid)
814    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
815       Affects results of exp. rotating_tank ; update output.txt.
816    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
817          and taking the square quantity and/or using a fraction-weight field.
818    o fix aim_diagnostics_init.F mate numbers.
819    o add mnc output capability to diagnostics/diagstat and update
820      our cvsignore files for the ACSII output generated
821    
822    checkpoint57k_post
823    o lab_sea now uses diagnostics package and provides a suite of
824      new EXF diagnostics output.
825    
826    checkpoint57j_post
827    o exf
828      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
829        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
830        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
831      * extended diagnostics output
832        - now includes all EXF variables
833        - hs, hl moved to common block
834        - separate S/R for diagnostics, called after ctrl vector is added
835        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
836        - EXFqnet contains true Qnet (i.e. includes qsw)
837      * updated verif. lab_sea, global_with_exf
838      * Rearranging hflux (exf_mapfields -> exf_getforcing)
839        to ensure that diagnostics sees a true EXFqnet
840    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
841    o diagnostics pkg: change pointers so that 1 diagnostic can be used
842      several times with different frequencies.
843    o mnc-ify the thsice package as requested by Daniel Enderton
844      - the monitor--MNC output needs work
845      - many attributes need to be added (most are currently blank)
846    o mnc-ify theaim_v23 package as requested by Daniel Enderton
847      - many attributes need to be added (most are currently blank)
848    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
849    o add Sadourny like discretization to the 4th.O vorticity advection scheme
850    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
851      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
852         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
853    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
854     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
855    
856    checkpoint57i_post
857    o Diagnostics package was changed: diagnostic allocation is now deactivated
858      by setting an empty file name in the namelist (used to be by setting 0 frequency)
859    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
860      add 1rst Order upwind vertical Shear.
861    o add a quick fix for A/B checkpointing in OFFLINE mode
862    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
863      end-run around the C/Fortran linking horror in eesup/src/timers.F
864    o added pkg/runclock: allows user to terminate run based on wall clock
865    o added non-hydrostatic scaling parameter: nh_am2
866    o pkg/my82: futile attempt to make results compiler-independent by adding
867      some "_d 0", etc. no effect.
868    o for mnc output, fill the 'T' coordinate var with myTime and create a
869      separate 'iter' variable for iteration count
870    o pkg/diagnostics:
871      add new capability: output of Global/Regional & per-level statistics ;
872      tested against monitor output (including land & thSIce) on various exp.
873    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
874    
875    checkpoint57h_done
876      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
877      data.diagnostics, data.gchem, data.ptracers) is done.
878    
879    o pkg/diagnostics: prepare for Global/Regional statistics.
880      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
881    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
882      and rename it: DIFFERENT_MULTIPLE
883    
884    checkpoint57h_post
885    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
886    o pkg/diagnostics: change output frequency, now in seconds (instead
887      of Nb of iterations). This requires to change data.diagnostics.
888    checkpoint57h_pre
889    
890    o in mnc, let the user create the output dir if both mnc_outdir_date
891      and mnc_outdir_num are false
892    o add fflags() to pkg/diagnostics which allows one to specify, on a
893      per-file basis, the file precision [default behavior is unchanged]
894    o added diagnostics to pkg/kpp, including computation of mixed layer
895      depth based on a temperature/density criterion
896    o updated verification/natl_box to test the new pkg/kpp diagnostics
897    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
898    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
899    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
900      not mnc -- this mistake was found by JMC and is now corrected
901    
902    checkpoint57g_post
903    o add Adams-Bashforth 3rd Order time stepping:
904      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
905      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
906    checkpoint57g_pre
907    
908    o make lambda[Theta,Salt]ClimRelax spatially varying
909      (default remains spatially uniform constant based on tau)
910    o added new control variables
911      * init. uVel, vVel, etanN
912      * lambda[Theta,Salt]ClimRelax
913    o separate masks used for ctrl_pack/unpack 'from write_grid' output
914      (suggested by G. Forget)
915    
916    checkpoint57f_post
917    o add parameter "baseTime" = model base time = time at iteration zero
918      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
919      account for baseTime shift
920    o move Coriolis arrays from PARAMS.h to GRID.h
921    checkpoint57f_pre
922    
923    o mnc-ifying the seaice package
924    o introduced an alternative length scale calculation for use in the limiting
925      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
926    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
927    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
928      as well as grad(vort3).  Made it compatible with both approximate form
929      for the cubed sphere and full form of these gradients.  Added flag
930      useFullLeith to select between approximate and full form.  
931    o add "d0" in getcon.F to reduce differences between compilers/platforms
932      update output.txt of exp. fizhi-gridalt-hs
933    o change port_rand funtion to allow to set the seed.
934    o fix obscure MNC bug involving conversion between reals and integers
935      - it caused no problems with certain (eg. gcc, ifc) compilers but the
936        new version is now more standards-compliant
937    o adjoint-related modifications
938      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
939      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
940      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
941    
942    checkpoint57e_post
943    o Adding eddy stress controls a la Ferreira et al.
944    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
945    
946    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
947      update output.txt of exp. fizhi-gridalt-hs
948    o add more "Z" dimensions and associated coordinate vars to MNC
949    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
950    o parameter calendarDumps: when set, approximate months (30-31 days) and years
951      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
952      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
953      months and years.  Requires pkg/cal.
954    o diagnostics: add pickup functionality
955      - off by default for backwards compatibility
956      - current version only uses MDSIO -- MNC will be added
957    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
958    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
959    
960    checkpoint57d_post
961    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
962    o modify verification/ideal_2D_oce so that it tests the creation of mnc
963      output from the diagnostics package
964    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
965    o make genmake2 more portable by using ".$FS" instead of ".f" for more
966      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
967    o add coordinate variables to the MNC output from the diagnostics package
968    o change MNC-flags default value: true when useMNC=TRUE
969    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
970      the ability (off by default) to read the grid information using MNC
971    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
972    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
973    o do snap-shot diagnostics at the middle of the time-interval (instead of
974      at the end).
975    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
976      new test for AIM with thSIce + slab-ocean
977    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
978    o move state variable diagnostics to the beginning of the time step ;
979      (note: still needs some work specially for snap-shot diagnostics)
980      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
981    
982    checkpoint57c_post
983    o Change testing option (-ieee) to get closer agreement between g77 & ifort
984    o generate new output.txt files on faulks with g77 & the new -ieee option
985    checkpoint57c_pre
986    
987    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
988      update output.txt of exp. global_ocean.90x40x15
989    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
990      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
991    o add saltFlux(+File) forcing capability with periodicExternalForcing
992    o allow to use pkg diagnostics for GM-Redi & ThSIce output
993    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
994    o improvements for the MNC output from DIAGNOSTICS:
995      - correct handling of the unlimitied dimension
996      - all dims now have associated coordinate variables
997      - variables located at U, V, and Corner ("Z") points are now written
998        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
999        *all* data points are output
1000    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1001    o added pkg/seaice/seaice_monitor.F
1002    o mdsio_readfield.F can now read files visible only to master MPI process.
1003    o pkg/seaice: some test code for ice-modified ocean stress
1004    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1005      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1006      spurious negative numbers for precipitation and humidity.  Will cause
1007      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1008    o pkg/ctrl/
1009      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1010        May be enabled via doPackDiag
1011      *  introduce z-scaling of
1012         + gradient (doZscalePack) and
1013         + control (doZscaleUnpack)
1014    o pkg/mdsio/
1015      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1016      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1017    
1018    checkpoint57b_post
1019    o simplify options in diagnostics_fill arguments (remove weird combinations)
1020    o fix MNC coordinate variables so that they now contain per-face index
1021      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1022      general, EXCH2 grids are only aligned to a "local" coordinate system
1023    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1024    o Implement instantaneous output within pkg diagnostics:
1025      setting a negative frequency in data.diagnostics produces
1026     "snap-shot" output (as opposed to time-average if freq > 0)
1027    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1028      NOTE: change ptracer diagnostics name: use 2 characters to work with
1029            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1030    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1031      becomes the coordinate variable for the 'T' dimension
1032    o add CF-style coordinate variables to MNC
1033      - just a first cut:  numbers are meaningless on the cubesphere and
1034        missing along the T axis but otherwise it works!
1035    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1036    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1037    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1038      this is based directly on what the model compute, so that the content of
1039      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1040    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1041    o clean up build options files for SunOS, in particular
1042      - remove -traditional from xmakedepend
1043      - change -xarch=v9 to -xarch=native for f77
1044      - restore use of make (not gmake)
1045      - add CC=gcc if using g77
1046    o changes per discussion of AM, JMC, & EH3 today:
1047      - move redundant "grid" variables out of "state" -- in preparation of
1048        creating proper CF-style coordinate variables and in recognition
1049        that any/all grid variables can be easily copied (eg. w/NCO) from
1050        the grid files into any of the other NetCDF files
1051      - *always* output grid variables with MDSIO (this will eventually be
1052        changed)
1053      - output MNC grid file if useMNC is true
1054    o every instance of _END_MASTER() has been found and replaced with
1055      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1056      preprocessors
1057    o re-arrange diagnostics pkg initialisation:
1058     - allow each package to extend the available diagnostics list
1059     - add some checking and fix small problems (multi-threaded, ...)
1060     - new S/R diagnostics_fill (replace fill_diagnostics):
1061       look through the short list of active diag. (instead of the long list)
1062       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1063    
1064    checkpoint57a_post
1065    o this set of changes restores TAMC compatibility
1066      tested for global_ocean.90x40x15 adjoint on trough
1067      (what a pain)
1068    
1069    checkpoint57a_pre
1070    o some modifs in tools/build_options for sunos
1071    o call ctrl_pack for ctrl at end for optimcycle=0
1072    
1073    checkpoint57
1074    o add horizontal bi-harmonic viscosity for vertical velocity
1075      - new parameter viscA4W (defaults to viscA4)
1076      - affects only non-hydrostatic code
1077      - to be done: no-slip lateral boundary conditions
1078    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1079    o implement Implicit Vertical advection for pTracers
1080    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1081      (implemented also for implicit vertical diffusion & advection)
1082    o OBCS: extend application of tracer open boundary conditions
1083      to a strip beyond the boundary of width Olx/Oly
1084    o add call monitor to TAF set of required calls (flow directives)
1085      and include in natl_box_adjoint
1086    o untangle a few ifdefs related to cost, ctrl, autodiff
1087      untangel a few ALLOW_ECCO_OPTIMIZATION
1088    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1089      (theta2, salt2 in ecco_cost_weights)
1090    
1091    checkpoint56c_post
1092    o OBCS as control variables
1093      - update ctrl_ad_diff.list, obcs_ad_diff.list
1094      - remove balance of obcs controls from default
1095      - fix index bug nobcs in ctrl_init
1096      - fix dummy fields filen in ctrl_pack
1097      - add dummy weights for obcs
1098    o lsopt: comment out fort.94 output
1099    o optim:
1100      - remove unnecessary header files
1101      - adjusted namelists
1102      - add xerbla.F to Makefile
1103    o exf:
1104      - multiple modifications of exf_check_range
1105      - unit change in exf_init_runoff from [m/year] to [m/s]
1106    o mdsio:
1107      - i/o-vector change debugLevel from debLevA to debLevB
1108    
1109    checkpoint56b_post
1110    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1111      is called from DO_THE_MODEL_IO
1112      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1113      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1114      - clean up PTRACERS_WRITE_TIMEAVE a little
1115    o add another verification experiment that tests both the cfc-pkg and
1116      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1117      reactive tendencies treated inline with regular timestepping
1118    o testreport previously did a lousy job of comparing small numbers, so
1119      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1120      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1121      testreport.
1122    o ptracers_monitor: bug fix for MPI
1123    
1124    checkpoint56a_post
1125    o GCHEM: finish reorganizating the package
1126      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1127        (introduces another 3D-array for each passive tracer, but only if
1128        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1129        gchemTendency is not needed because the timestep is done separately)
1130      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1131      - GCHEM is now---more or less cleanly---separate from PTRACERS
1132      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1133        so clear to me how that should be done in a general way.
1134    o CFC: improve formatting of output in CFC_ATMOS
1135    o PTRACERS:
1136      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1137        that ALL experiments with ptracers enable can be checked. This makes
1138        GCHEM_MONITOR obsolete.
1139      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1140        monitorFreq
1141      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1142    o add PTRACERS (PTR0[1-5]) to testreport output
1143    o exf_check_range:
1144      * default changed to .TRUE.
1145      * will check values for niter0 if debLevA, every timestep if debLevB
1146      * STOP in exf_check_range if 'out of range'
1147      * range chosen generous to allow for potential extema
1148      TBD: a version with stricter range
1149           permitted range would be runtime parameters
1150    o GMredi:
1151      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1152      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1153      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1154    o GCHEM:
1155      - move call to GCHEM_FORCING_SEP, so that it is now called before
1156        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1157      - introduced a useGCHEM runtime flag and applied it everywhere.
1158      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1159        this flag is now only visible within GCHEM-pkg routines.
1160      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1161        be replaced by a 3D array that is computed before thermodynamics; for
1162        this, the tracer ID iTracer had to be included into the parameter list
1163        of ptracers_forcing
1164      - set up forward_step to call gchem_forcing, that will replace
1165        gchem_forcing_int in ptracers_forcing
1166      - cleaning up
1167    o small cleaning of exch2: remove files that are also in eesupp/src
1168    
1169    checkpoint56
1170    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1171    o mnc: cleanup "full" files--fixes out-of-memory problem
1172    o ECCO-GODAE
1173      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1174      * fully merged and updated from SIO code
1175        windstress sign change affects
1176        - exf_inscal_[u/v]stress
1177        - sign of xx_tau[u/v] adjustments
1178        - signs in cost_scat
1179      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1180      * natl_box_adjoint updated and compressed
1181      * 2-level checkpoint switch added
1182        (tested in EXP. 1 of natl_box_adjoint)
1183      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1184    o SVD
1185      * first complete, non-hacked version for SVD calculations
1186      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1187        performed via direct access files admtlm_vector.it????
1188        (via ctrl_[un]pack)
1189      * optimcycle is used for ARPACK iteration counter
1190        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1191      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1192        and add linear transforms where necessary
1193      * controls are initial/final SST, SSS (can be extended; need to check
1194        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1195    o mdsio: filename info to both stderr, stdout
1196    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1197      from sign change
1198    
1199    checkpoint55j_post
1200    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1201      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1202    o add consistent build directories and .cvsignore files to verification
1203    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1204    o make all subroutines 30 or less characters in length for certain older
1205      compilers to work (a thorough search only turns up two routines in
1206      pkg/ptracers)
1207    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1208      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1209    
1210    checkpoint55i_post
1211    o change arrays for total vertical diffusivity (2.D if explicit,
1212      3.D if implicit) ; each ptracer uses its own background value.
1213    o added mnc/NetCDF output capability to ocn_compon_interf
1214      - added bits to verification/cpl_aim+ocn so that it can run on
1215        ITRDA and other clusters without the mpirun "-wd" option
1216    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1217      configuration
1218    o give MNC the ability to create additional files rather than
1219      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1220      - the default is just less than 2GB which is a practical limit
1221        on many systems
1222    o Compute the non-local term using either KPP vertical diffusivity (=default)
1223       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1224    
1225    checkpoint55h_post
1226    o add verification test "vermix"
1227    o remove all the *_ioinc flags and replace with the single global
1228      outputTypesInclusive flag
1229    o allow to set a vertical profile of vertical diffusivity for T & S
1230    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1231    o useMNC moved from data.mnc to data.pkg
1232    
1233    checkpoint55g_post
1234    o Renaming carbon AD experiments to comply with testreport conventions
1235    o Updating adjoint of Held-Suarez hs94.1x64x5
1236    o Fixing directives for non-ECCO forward_step, after ECCO directives
1237      have been fixed to avoid recomp. of do_oceanic_phys
1238      Works well for global_ocean.90x40x15,
1239      but recomp. issue remains for carbon
1240    o Updating adjoint output for natl_box_adjoint after
1241      pkg/ecco has been modified (see taga c55d_post)
1242    
1243    checkpoint55f_post
1244    o rename to timeave_init_fixed
1245    
1246    checkpoint55e_post
1247    o some delicate re-shuffle of store directives to avoid one
1248      extra call of do_oceanic_physics
1249      affects ecco_the_main_loop.F, do_oceanic_physics.F
1250      checkpoint_lev1_directives.h
1251    o NB: this may break global_ocean adjoint temporarily,
1252      but it is clear how to fix it. Will do later, need this now.
1253    
1254    checkpoint55d_post
1255    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1256    o ecco_cost_weights is modified to 1x1 runs
1257    o modifs to allow observations to be read in as
1258      single file or yearly files
1259    o enable to read exf forcing fields as either
1260      single file or yearly files (flag useExfYearlyFields)
1261    checkpoint55d_pre
1262    
1263    o switch between 2-level and 3-level checkpointing
1264    o add ability of MNC to write local and "partial" (eg. 2D slices where
1265      the full 3D field is never actually stored) arrays to NetCDF files
1266      with the correct (that is, the complete multi-dimensional) set of
1267      array indicies
1268      - used in mom_vecinv() to write the diagFreq output
1269      - tested (demonstrated) in verification/aim.5l_cs
1270    o further mnc-ification
1271      - add verification/lab_sea to the list with mnc setups
1272      - fix undefined mnc v-names in cd_code
1273      - add kpp to mnc output (both snapshot and timeave)
1274    o non-hydrostatic code
1275      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1276        in calc_gw.F
1277      - defaults to viscAh
1278      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1279        friction or Leith) in non-hydrostatic mode, as long as there is
1280        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1281    o pkg/cost
1282      extend simple cost functions to treat time mean quantities
1283      (T,U,V) via cost_accumulate_state from cost_tile
1284    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1285        be 2 times larger than the minimum size the advection scheme requires.
1286        now get a perfect conservation of salt in advect_cs test-exp (updated)
1287    o GGL90 (Gaspar's TKE mixed layer)
1288      - add horizontal diffusion of TKE, requires exchanges in
1289        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1290        default. In OPA there is no horizontal diffusion of TKE but the
1291        mixing coefficients are computed from a horizontal average of TKE of
1292        6 points or so. I think that diffusion has a little more physical
1293        justification.
1294      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1295        was in vain)
1296      - mask tke-variable in ggl90_init
1297    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1298    o fix biharmonic diffusion on CS-grid.
1299    o more obcs stuff
1300      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1301        for reading boundary values. This routine is called from
1302        obcs_prescribe_read
1303      - updated obcs_check
1304      - changed sponge layer relaxation parameter units for days to seconds
1305      - turned off sponge layer by default
1306      - changed argument list of OBCS_CALC to myTime+deltaTclock
1307      - fixed about 35 bugs in obcs_external_fields_load
1308    
1309    checkpoint55c_post
1310    o obcs stuff
1311      - new runtime flags useOBCSprescribe, useOBCSbalance
1312      - re-arranged obcs_calc
1313      - moved exf_getobcs to obcs_prescibe_read
1314        obcs_prescibe_read is called after ORLANSKI stuff
1315        and independent of it (executable can contain all).
1316      - updated obcs_check
1317      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1318        These may be necessary only if tangential velocities are
1319        prescribed at OB, not sure, needs testing.
1320    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1321      which simplifies the calls and passes the ifc check-bounds test
1322    
1323    checkpoint55b_post
1324    o add a 2D scalar, Z location, exchange_2 routine.
1325    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1326      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1327      affects advect_cs results (for the wrong reason): update output.txt
1328    o use a more standard discretization for biharmonic viscosity ;
1329     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1330      affects results of dome set-up: update output.txt
1331    o fix gad_advection.F (CubedSphere part), back to version 1.23
1332    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1333    
1334    checkpoint55a_post
1335    o merged code to
1336      * prescribe/read time-dependent open boundaries
1337        (works in conjunction with exf, cal)
1338      * sponge layer code for open boundaries
1339      * each boundary N/S/E/W now has its own CPP option
1340        (healthy for the adjoint)
1341    
1342    checkpoint55
1343    o up-to-date adjoint of previous breaks
1344      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1345      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1346      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1347      - carbon: * remove tr1-related adjoint verification
1348                * add ptracer as control variable
1349    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1350      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1351    
1352    checkpoint54f_post
1353    o in verification/carbin/ remove experiment related to
1354      ALLOW_PASSIVE_TRACER (array tr1 etc)
1355      code_ad/ input_ad/ results_ad
1356    
1357    o add two new packages
1358      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1359        + subject to optimization (memory)
1360      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1361        + subject to reordering (many GOTOs in the original code)
1362        + so far opps is called for every (i,j) point, and then operates in
1363          the vertical; one may want to reorder the scheme in order operate in
1364          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1365          fields)
1366    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1367      - all verification tests compile and run with linux_ia32_g77
1368      - defaults are compatible with current input files--nothing
1369        should change if you were not previously using MNC
1370      - MNC output has been added in numerous places (eg. timeave)
1371        but there are still a few writes not yet do-able with MNC
1372        (this is in progress)
1373      - flags now allow for either/or/both use of MDSIO and MNC and
1374        documentation will soon follow
1375      - numerous small formatting cleanups for ProTeX
1376    o add version info (via BUILD_INFO.h) to MNC and stdout
1377    
1378    checkpoint54e_post
1379    o add two new packages
1380      - pp81 (Packanowski and Philander, 1981), Richardson number and
1381        stratification dependent mixing
1382      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1383      - these scheme operate in a similar manner as KPP (without ghat, of
1384        course), however there is only one diffusivity that is used for both
1385        temperature and salinity (and passive tracers)ç
1386    o add offline package
1387    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1388      provided by Stephanie Dutkiewicz
1389    o genmake2: add ability to search for C compilers and cleanup test output
1390      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1391    
1392    checkpoint54d_post
1393    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1394    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1395      leading to additional shift by 5 days each year of integration
1396       (i.e. leading to considerable offset over the years)
1397    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1398    o start with no AB and no initial filtering (staggerTimeStep):
1399      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1400    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1401      (external loading & cpl import/export stay in forward_step.F)
1402    o update coupling interface to work with new staggerTimeStep
1403    o change MDSIO ptracers_pickup.
1404    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1405    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1406    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1407    
1408    checkpoint54c_post
1409    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1410      this affects (truncation error) output.txt of test-exp:
1411       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1412    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1413    o change Qnet to always be the net heat flux, (+upward).
1414      affects (truncation error) output of natl_box exp.: updated
1415    o define the max number of passive tracers in PTRACERS_SIZE.h
1416    o start to test mnc routinely in exp0
1417    o add sea-ice loading (sIceLoad) as a new forcing field.
1418    
1419    checkpoint54b_post
1420    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1421       impressive on Altix and Opteron systems)
1422    o diagnostics can now write NetCDF files through the mnc package
1423    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1424    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1425    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1426      affects (truncation error) output of lab_sea & natl_box exp.: updated
1427    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1428    
1429    checkpoint54a_post
1430    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1431    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1432    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1433    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1434      + internal_wave (shift in writing cg2d_ini_res)
1435    checkpoint54a_pre
1436    
1437    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1438      - modified verification/lab_sea and natl_box_adjoint accordingly
1439    
1440    checkpoint54
1441    checkpoint53g_post
1442    o prepare splitting of thermodynamics: store convect.counter in common block
1443    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1444      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1445    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1446    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1447    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1448    o restore adjointability
1449    
1450    checkpoint53f_post
1451    o modifications that affect AIM experiment results (update output.txt):
1452      - no advection of S at top interface Nr (pkg/generic_advdiff)
1453      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1454    o AIM pkg:
1455      - include stability function into surf.Flux derivative relative to Tsurf
1456      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1457    
1458    checkpoint53e_post
1459    o merged cylindrical coord configuration
1460    o added rotating_tank experiment
1461    checkpoint53e_pre
1462    
1463    checkpoint53d_post
1464    o faulks upgraded: re-generate output.txt that have changed:
1465       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1466    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1467    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1468    o added Sadourny discretization of Coriolis
1469      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1470      - re-enabled use of omega3 (useAbsVorticity)
1471    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1472      vector-invariant equations
1473      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1474    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1475      hopefully without new bugs
1476      - still to do: biharmonic friction for non-hydrostatic w
1477    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1478    o regenerated output for global_ocean_ebm (using -ieee)
1479    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1480      of mom_common/
1481      - simple re-arrangement of instructions within computing loop
1482    checkpoint53d_pre
1483    
1484    checkpoint53c_post
1485    o new version of coupler for AIM+thSIce and Ocean models
1486     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1487     - land: change Evaporation of snow
1488     - aim with thSIce: fix bug in snow-precip.
1489    o changes to calc_gw.F
1490     - bug fix for w^2 term near the bottom boundary
1491     - (hopefully) improve the lateral slip boundary condtions for use with
1492        partial/looped cells
1493      - because the bug fix changes two verification experiments anyway (exp5
1494        and plume on slope), change the lateral boundary condition from half slip
1495        to the value of no_slip_sides
1496    o ebm package wasnt quite up to the parallel task. Fixed that.
1497    o Adjoint of EBM package + verification
1498      * TLM OK
1499      * ADM not sufficient accuracy yet (needs further testing)
1500    
1501    checkpoint53b_post
1502    o Commiting new energy balance model to repository
1503      * package is pkg/ebm
1504      * verif. is verification/global_ocean_ebm
1505      * references are in ebm_driver.F
1506    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1507    C        Global thermohaline circulation. Part I:
1508    C        Sensitivity to atmospheric moisture transport.
1509    C        J. Climate 12(1), 71-82
1510    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1511    C        Global thermohaline circulation. Part II:
1512    C        Sensitivity with interactive transport.
1513    C        J. Climate 12(1), 83-91
1514    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1515    C        Destabilization of the thermohaline circulation
1516    C        by atmospheric eddy transports.
1517    C        J. Climate 7(12), 1870-1882
1518    o Will need long integration testing.
1519    checkpoint53b_pre
1520    
1521    o created pkg/mom_common in preparation for variable viscosity code
1522    o renamed and split ini_mnc_io
1523    o pkg/land: only liquid water can diffuse or run-off
1524    o AIM using land: soil wetness availability account for snow
1525    o added printMapIncludesZeros to EEPARMS namelist
1526    
1527    checkpoint53a_post
1528    o restore TAMC compatiility for exf_constants.h
1529      (no usage of _d in .h)
1530    o Additional storing in KPP in an attempt to fix
1531      TAMC problem with adjoint of KPP code.
1532      (no success...)
1533      Identical code works fine with TAF.
1534    o Fixed verification/natl_box_adjoint experiments.
1535      Initial conditions for Experiments 4 and 5 are now
1536      set to "SEAICE_initialHEFF=0", which is more reasonable,
1537      and hence gives results closer to that of Experiment 2.
1538      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1539    
1540    checkpoint53
1541    o stable checkpoint with up to date adjoint
1542      TLM tests only run for 1st grdchk at the moment. Its unclear if
1543      this is a code problem or a problem with resetting code for g_
1544      variables that is being autogenerated wrong.
1545      Otherwise:
1546       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1547       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1548         are both still in chaos following their security messes.
1549    
1550    checkpoint52n_post
1551    o various build (mostly genmake2) changes including:
1552      - ability to build/run more easily within Cygwin and MacOS X
1553      - more complicated Makefiles with a stronger dependence on Gnu Make
1554    o pkg/seaice modifications
1555      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1556        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1557        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1558      - changed proxy for geostrophic velocity and updated
1559        verification/lab_sea/results/* accordingly
1560      - removed ADI dynamic solver from pkg/seaice
1561      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1562        they caused a segmentation fault under certain circumstances
1563      - removed unused field WATR
1564    o bug fix in exf-package:
1565      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1566         now reflect that.
1567    o small fixes in the cal-package:
1568      - set reference date to first of January for the 'model'-calendar
1569      - failing of cal_CheckDate in cal_FullDate now actually results in a
1570        warning
1571    o small modifications in exf-package to increase flexibility:
1572      - change climtempfreeze from a constant to a runtime parameter that
1573        is specified in data.exf_clim (default = -1.9)
1574      - introduce runtime parameter windstressmax (default = 2.0) that is
1575        specified in data.exf
1576    o fix in pkg/thsice:
1577      - update Evap (Tsf changes) to be consistent with Latent heat flux
1578      - maintain snow precipitation unchanged (even if Tsf >=0).
1579     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1580    
1581    checkpoint52m_post
1582    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1583      this does not change any of the results, because myIter=0 in swfrac always
1584      lead to jwtype=2 (the default anyway), but the call makes little sense
1585      as a default
1586    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1587    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1588      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1589    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1590    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1591    o extending useSingleCpuIO option to work with new exch2 I/O format
1592      - old-style, missing-tile I/O is still accessible by defining CPP
1593        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1594    o monitor package can write to NetCDF files and/or STDOUT
1595    o fix re-definition bug in MNC_GRID_INIT_ALL()
1596    o doc/api_reference added
1597      - a framework for building an API Reference Manual using all
1598        the "protex" comments embedded in the code
1599      - see pkg/generic_advdiff, pkg/mnc for examples
1600    o MNC:
1601      - make myThid the last argument for all subroutines
1602      - new default for the grid files: NO halos
1603      - add useMNC and other run-time flags
1604      - separate per-file-group handling of the unlimited dimension
1605      - early initialization of MNC w/ flags read at the eeboot stage
1606        and lookup tables set in initialize_fixed
1607      - write all MNC output to a freshly-created directory
1608    o thermodynamics sea-ice (thsice) is now tested with testreport.
1609    o test exp. advect_cs: use the standard cs32 grid ; update output.
1610    o Added functionality to grdchk:
1611      pick global i,j,k position (or nearest wet) where to perform check.
1612    
1613    checkpoint52l_post
1614    o new land formulation:
1615      a) use ground enthalpy as prognostic variable to ensure exact
1616         energy conservation.
1617      b) account for water temperature and for latent heat of freezing
1618         in all processes (rain, run-off, ground storage)
1619      c) compute surface and ground temperature implicitly.
1620    o aim_v23 modification for new land model:
1621      a) Treat separately land / ocean / sea-ice surface fluxes
1622         to allow implicit computation of land & sea-ice surface temp.
1623      b) add snow precipitation.
1624    checkpoint52l_pre
1625    
1626    o fix problem (when 1 tile is empty) in min/max monitor.
1627    o fix bug in timeAve (u,vZetatave in common block)
1628    o no restoring terms under ice for pkg/seaice
1629    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1630    o bug fix for pkg/seaice pickups
1631    o change MNC call locations and add coordinate attributes
1632    o mask vorticity at the corner ; affects global_ocean.cs output
1633    o fix ini_curvilinear_grid ; test CS experiments with mpi
1634    o aim.5l_cs: modify sea-ice fraction input file ; update output
1635    o exf: Adding simple range check routine for exf fields after read
1636    
1637    checkpoint52k_post
1638    o removed top-level directory "diags"
1639      - we migrated these functions to pkg/timeave a long time ago
1640    o fixed bug introduced in pkg/monitor
1641    o accuracy ctrlprec = 32 insuffient for gradient checks using
1642      averaged fields (I/O via cost_averages)
1643      -> use ctrl.h in active_file*.F to control I/O precision.
1644    o paramter list of CALL ADTHE_MAIN_LOOP
1645    o added initial do_the_model_io to ecco
1646    o set all ...Freq to zero after cost_final
1647      taveFreq, dumpFreq, pChkptFreq
1648    o MAIN and ECCO differentiability restored
1649    
1650    checkpoint52j_post
1651    o fix nchklev in tamc.h for global_ocean...
1652    o Bringing flow and store directives up-to-date
1653    o Really weird thing!
1654      call do_the_model_io from the_main_loop with parameters
1655      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1656      TAF places a faulty re-call of initialise_varia
1657      after cost_final call which should not be there!
1658    checkpoint52j_pre
1659    
1660    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1661      error messages
1662    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1663    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1664      debug output
1665    o modfied mdsio_writefield.F to handle non-global files under exch2
1666    o update AIM Cubed-Sphere exp (aim.5l_cs):
1667      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1668    o update AIM Equatorial Channel exp:
1669      use standard aim_v23 pkg and change the SST fields to be more realistic.
1670    o globalFile now works with exch2
1671    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1672      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1673    o limit timeave output for hi-res integrations
1674    
1675    checkpoint52i_post
1676    o removed CPP_EEOPTIONS.h from verification/*/code
1677    o updated the tiling for global_ocean_pressure
1678    checkpoint52i_pre
1679    
1680    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1681      the old pkg/aim).
1682    
1683    checkpoint52h_pre
1684    o shortened offending lines in exch2_send_rx?.template
1685    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1686    o genmake2: add build & execute test for NetCDF code
1687    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1688      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1689    o added useSingleCPUIO flag to monitor.F and mon_out.F
1690    o added temporary hack for sea-ice dynamics on the cube:
1691      metric terms are ignored and it is assumed that
1692      there is no sea-ice on cube faces 1, 2, 4, and 5.
1693    
1694    checkpoint52f_post
1695    o added exch2 cube routines to pkg/exch2
1696    o modified hs94.cs-32x32x5 to use it
1697    o added new grid files to hs94.cs-32x32x5
1698    checkpoint52f_pre
1699    
1700    checkpoint52e_post
1701    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1702      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1703    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1704      to work with implicit vertical advection and AB ;
1705    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1706    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1707     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1708    checkpoint52e_pre
1709    
1710    o fix bug in impldiff when Nr=1 or Nr=2.
1711    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1712    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1713    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1714      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1715    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1716    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1717    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1718    
1719    checkpoint52d_post
1720    o re-tiled many expts to allow comparison in multi-processor mode
1721      - updated output accordingly
1722      - changed hs94.128x64x5 to use intial T from file rather than use the
1723        random number generator
1724    o add infrastructure in model routines for fizhi and gridalt packages
1725    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1726    o changes to permit hi-res, cubed-sphere, configuration
1727      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1728      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1729      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1730        of surface winds for the cube
1731      (A verification experiment, based on global_ocean.cs32x15, but with
1732       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1733       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1734       complete with example surface forcing files and matlab scripts to look
1735       at the output and compare it with that of global_ocean.cs32x15.)
1736    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1737       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1738       to conform to the common rule.
1739    o check-in the first version of the coupler + interfaces for multi-components
1740       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1741       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1742       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1743       - ocean and atmos. share the same horizontal grid (no interpolation).
1744       - exchanges between component and coupler is done in forward_step
1745    o new verification experiment, cpl_aim+ocn:
1746       coupled ocean - AIM atmosphere on cs32 grid.
1747    
1748    checkpoint52d_pre
1749    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1750    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1751    
1752    checkpoint52c_post
1753    o Fixing OPTIONS files for use of exf:
1754      - ALLOW_ECCO not needed
1755      - ECCO_CPPOPTIONS.h should not be included from
1756        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1757        as has been the case in the past
1758      - All cal/exf related options are currently set in
1759        single header file. Should remain so until we
1760        agree on a consistent new policy.
1761    o Removed all CPP options for cal package.
1762      cal has no more CPP options.
1763    o modified STOREs in GAD_ADVECTION
1764    o corrected key comp. for passkey
1765    
1766    checkpoint52b_post
1767    o new version: "thsice" of thermodynamic sea-ice pkg:
1768     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1769     - modify fluxes but do not change theta directly;
1770     - light cleaning of bulk_force pkg (still needed with thsice).
1771     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1772       + output_thsice.txt to test thsice & bulk_force pkgs.
1773    o put back grid & coriolis monitor output.
1774    checkpoint52b_pre
1775    
1776    o call "do_the_model_io" at the beginning (=> dump initial state)
1777    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1778    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1779      (need info on NUMBER_OF_PTRACERS)
1780    o missing PTRACERS headers in some routines
1781    o default tamc.h in pkg/autodiff supposed to crash
1782      to ensure proper customization
1783    
1784    checkpoint52a_post
1785    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1786      - moved surfaceTendencyTice from pkg/seaice to main code
1787      - subroutine FREEZE_SURFACE now limits only surface temperature
1788        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1789        => new output.txt for global_ocean.cs32x15 & global_with_exf
1790      - keep the old version of FREEZE for backward compatibility;
1791        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1792      - corresponding modifs for TAF directives
1793    o added surface flux output variables to TIMEAVE_STATVARS
1794    o time-averaged output for pkg/ptracers
1795    o fix problem with ECCO-related divided adjoint
1796      snapshot file was missing some ad-variables,
1797      but no warning issued by TAF
1798    
1799    checkpoint52a_pre
1800    o some bug fixes for #undef REAL4_IS_SLOW
1801    
1802    checkpoint52 = ecco_c52_e35
1803    o after testing adjoints of checkpoint51u_post
1804    
1805    checkpoint51u_post
1806    o this is the post-merge tag of the ecco-branch
1807      (needs another clean checkout and re-testing)
1808    o various natl_box_adjoint configs and results
1809      but no input fields
1810    o obcs adjoint not yet merged!
1811    o adding ECCO global 1x1 and 2x2 degree configs
1812    o updated/extended some store directives for seaice
1813    o pkg/ecco now containes ecco-specific part of cost function
1814    o top level routines the_main_loop, forward_step
1815      supersede those in model/src/
1816      previous input data.cost now in data.ecco
1817      (new namelist ecco_cost_nml)
1818    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1819    
1820    checkpoint51t_post
1821    o this is the pre-merge tag of the ecco-branch
1822    
1823    checkpoint51s_post
1824    o cleanup: removed various obsolete #define-s
1825    o pkg/grdchk
1826      - renamed 'ph-grd 3' to 'grad-res'
1827      - merged from ecco-branch
1828        (remaining bug fixes for obcs gradient checks)
1829      - additional high-precision output for testreport
1830        (grep for 'precision_grdchk_result')
1831    
1832    checkpoint51r_post
1833    o cleaned up or removed CPP_OPTIONS.h files
1834    o updated results for some of the tests to reflect the new
1835      optfiles (-ieee: -O0 instead of -O3)
1836    
1837    checkpoint51q_post
1838    o cd_code:
1839      - moved cd_scheme.F -> cd_code_scheme.F
1840      - separate read_checkpoint from cd_code_ini_vars.F
1841      - separated cd_code part from write_checkpoint
1842      - updated AD_SOURCE, generated .flow
1843      - added CD_CODE_VARS.h to the_main_loop
1844      - Moving cd_code specific store dir.s to pkg/cd_code
1845    o ctrl package totally restructured
1846      - pack/unpack now optional and decoupled from
1847        xx_/adxx_ I/O
1848      - ctrl_pack/unpack cleaned
1849        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1850      - confined inclusion of AD_CONFIG.h to where necessary.
1851    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1852    
1853    checkpoint51p_post
1854    o create initial cd_code package
1855      - WARNING: the initialization of fields within packages
1856        is broken because INI_FIELDS (where READ_CHECKPOINT is
1857        called) is called *before* PACKAGES_INIT_VARIABLES.
1858        This seems to be backwards since
1859        1) its important to initially zero the entire field including
1860           the "halo" region
1861        2) zeroing needs to be done *before* reading pickup info
1862           and the pickup call might or might not happen in any
1863           particular run
1864      - this needs an overhaul for R2
1865    o cleanup verification/*/code/GMREDI_OPTIONS.h
1866    o cleanup testreport
1867    
1868    checkpoint51o_post
1869    o bringing AD-related verif's up to date with genmake2
1870      - carbon/
1871      - global_ocean.90x40x15/
1872      - hs.94.1x64x5/
1873      - (front_relax/ )
1874    o (more) consistent directory structure for AD-related verif.'s
1875    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1876    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1877    o bug fix in find_alpha.F for MDJWF:
1878      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1879        change rho -> rho-rhoConst
1880      - replace call find_rho to find_rhonum
1881    o initialisation of rFlx extended to full array (required by TAF)
1882      and shifted to thermodynamics
1883    o removed PTRACERS.h in ptracers routine
1884    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1885    o Correcting initialisations for fVerU, fVerV.
1886    o helping TAF to recognize dependency on kUp for
1887      fVerU, fVerV
1888    o Replacing delZ by delR in pkg/ctrl/
1889    checkpoint51o_pre
1890    
1891    o undid all of cp51 pending some cleanups and discussion
1892    o added the [#include "AD_CONFIG.h"] statement to all files that need
1893       it for adjoint/tl #defines
1894     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1895     o removed tools/genmake since it no longer works
1896    
1897    checkpoint51n_post
1898    o modifications to make FREEZE flux visible to pkg/kpp
1899      - moved surfaceTendencyTice from pkg/seaice to main code
1900      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1901      - subroutine FREEZE now limits only surface temperature
1902        (this means new output.txt for global_ocean.90x40x15,
1903         global_ocean.cs32x15, and global_with_exf)
1904    o added surface flux output variables to TIMEAVE_STATVARS
1905    
1906    checkpoint51n_pre
1907    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1908    o added [#include "AD_CONFIG.h"] to all files that use the following
1909      defines:
1910      - ALLOW_ADJOINT_RUN
1911      - ALLOW_TANGENTLINEAR_RUN
1912      - ALLOW_ECCO_OPTIMIZATION
1913    
1914    checkpoint51m_post
1915    o incorporating changes to get TAMC/TAF working in genmake2
1916      - added new TAMC/TAF targets to the Makefile
1917      - various cleanups related to package handling
1918      - these changes should have no impact on the forward model
1919    
1920    checkpoint51l_post
1921    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1922     - faster algorithm for cal_addtime.F
1923     - higher precision arithmetic, where needed
1924     - pkg/exf *startdate variables changed from calendar date to
1925       model integration time
1926    
1927    checkpoint51l_pre
1928    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1929    o enable to apply restoring on S & T only in a latitude band.
1930    o update output (external_forcing_surf modif. change truncation errors)
1931       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1932    
1933    checkpoint51k_post
1934    o change default to: useNHMTerms=.FALSE.
1935     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1936       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1937     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1938        exp1, ideal_2D_oce
1939     - change data file of oceanic exp (leave the results unchanged for now)
1940       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1941    o set gravitySign automatically according to the vertical coordinate used
1942      (and change sign: back to "logical" value: +1 when R increases downward)
1943    o added an include barrier to the default CPP_OPTIONS.h and
1944      removed the #include "PACKAGES_CONFIG.h" from it
1945    o fix a bug in mom_fluxform (from chk51j_post)
1946    
1947    checkpoint51j_post
1948    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1949    o adjusted some flow directives (dynamics, thermodynamics)
1950    o added cubed-sphere case to test cost function
1951    o heckpoint_lev?_directives.h now include
1952      pkg-specific directives, whenever those are enabled.
1953    o Moving pkg-specific flow directives to corresponding pkg
1954      Moving pkg-specific differentiation list to corresponding pkg
1955      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1956      ---> conventions are
1957           - pkg_ad.flow
1958           - pkg_ad_diff.list
1959           - pkg_ad_check_lev?_dir.h
1960    
1961    checkpoint51i_post
1962    o merge of the branch-genmake2
1963      - knowingly breaks the older genmake
1964      - automatic generation of all ALLOW_${PKG_NAME} defines
1965      - new testreport supersedes older testscript
1966    o large number of package inclusion and header cleanups
1967    checkpoint51i_pre
1968    
1969    o new output for adjoin of global ocean vector invariant
1970    o fix for checkpoint of thermodynamic seaice and bulk_force
1971    o Steph gchem various cleanups
1972    
1973    checkpoint 51h_pre
1974    o fixed some single quotes
1975    o modify gchem pkg to be more versatile
1976    o modifications to clean up dic pkg
1977    o add pkg/cfc
1978    
1979    checkpoint51g_post
1980    o provide links for ARPACK and ADM*TLM
1981    o start removing verification/vero/
1982    o update AD-related stuff
1983      (in particular some IF-statements in model/src/ routines)
1984    o adding to verification/global_ocean.90x40x15/ adjoint of
1985      vector invariant setup
1986    
1987    checkpoint51f_post
1988    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1989    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1990      of tracer Green's fucntions for ocean inversion project.
1991    
1992    checkpoint51f_pre
1993    o Added on-the-fly spatial interpolation capability
1994        "USE_EXF_INTERPOLATION" to pkg/exf.
1995      - This is a temporary Cartesian-grid hack until
1996        the super-duper ESMF coupler becomes available.
1997      - See verification/global_with_exf/README for usage example.
1998      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1999        flags and modified pkg/seaice accordingly.
2000    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
2001        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
2002        non-local transport term.
2003    
2004    checkpoint51e_post
2005    o pkg/mom_vecinv:
2006      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
2007      - add time-ave diagnostic of vorticity advection.
2008    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
2009    o atmospheric geopotential: - include water vapor effect;
2010                                - use p^kappa in p* scaling.
2011    o land pkg: read initial state from files.
2012    o AIM : add stratospheric drag in the upper level
2013    
2014    checkpoint51d_post
2015    o change function ILNBLNK (=> last non-blank char.) to return zero
2016      (instead of the string length) when the string. char is empty
2017    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
2018    o modif's to restore TAMC compatibility
2019      - avoid "_d" constructs in PARAMETER declarations
2020      - avoid interrupting lines by comment lines
2021    o Use cluster local disks for purely local I/O
2022      vs. globally visible disks needed for ctrl stuff
2023      (merged from ecco-branch)
2024      - new active_file_loc... and mdsio_..._loc routines
2025      - affected packages: autodiff, ctrl, grdchk, mdsio
2026    
2027    checkpoint51c_post
2028    o introducing integer flag debugLevel
2029      - debLevZero: suppress all output
2030      - debLevA: standard
2031      - debLevB: equivalent to current debugMode=.TRUE.
2032    o introducing pathname variable mdsioLocalDir for mdsio
2033      that can be specified at runtime
2034      (relevant for cluster I/O to local disk)
2035    `
2036    >>>checkpoint51b_post
2037    adjoint of ptracers
2038    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
2039    o extended state in checkpoint_lev?, etc.
2040    o alternative ctrl/cost with tr1 or ptracer
2041    o new comlev1_bibj_ptracers
2042    o new ptracers.flow
2043    o made ptracers_forcing same as external_forcing_s
2044    o added verification for adjoint with ptracers
2045      - adm. grdchk fail so far
2046      - tlm. grdchk OK
2047      - checked tapelev/comlev recomputations: OK
2048    <<<checkpoint51b_pre
2049    
2050    checkpoint51a_post
2051    o added code for biogeochemistry package
2052      - new pkgs: dic, gchem
2053      - new subroutine in ptracers
2054    o modify code for biogeo packages
2055      - in model/src and pkg/ptracers
2056    
2057    checkpoint51
2058    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
2059      - autodiff, ctrl, exf, grdchk, seaice
2060      kept separate packages
2061      - cost, ecco, obcs
2062    o updating verification/internal_wave, verification/lab_sea
2063      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
2064    
2065    checkpoint50i_post
2066    o Preparing next differentiable checkpoint and sync
2067      of MAIN vs. ecco-branch
2068      - 1st step: this one is differentiable
2069      - 2nd step: next(! not this) checkpoint will have updated packages
2070                  from ecco-branch)
2071    
2072    checkpoint50h_post
2073    o new package "land": provide surface BC for AIM.
2074    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2075    o AIM: use true log-P extrapolation for near surface temp (= as in
2076        F.Molteni paper) ; update aim.5l_cs output.
2077    o New variable in PARM03 for more flexible pickups
2078    o somewhat cleaned package initialisation sequence for
2079      ctrl/ cost/ ecco/ in packages_... routines
2080    
2081    checkpoint50g_post
2082    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2083      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2084      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2085        made the default because of faster convergence than ADI
2086    
2087    checkpoint50f_post
2088    o exf totally restructured
2089      - replaced all exf_set_ routines by one generic exf_set_gen.F
2090        and made sure it's still differentiable
2091      - split exf_getffields.F into new exf_bulkformulae.F
2092      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2093      - updated adjoint/makefile and relevant verif. accordingly
2094    
2095    checkpoint50f_pre
2096     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2097          + change Evap over land. (update aim.5l_cs output)
2098     o added missing .cvsignores and made uniform across expts
2099     o changed configuration of tidal_basin_2d expt
2100     o added pkg/debug functions for tracing code in fatal crashes
2101     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2102     o new fn in pkg/monitor to stop model if solution grows too big
2103     o removed lots of single quotes from comments
2104    
2105    checkpoint50e_post
2106    o make KPP work with PTRACERS
2107     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2108       nearly a copy of kpp_transport_s
2109     - there is no analogue to SurfaceTendencyS, so I have to use
2110       gPtr(of the surface layer) instead
2111    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2112    checkpoint50e_pre
2113    
2114    checkpoint50d_post
2115    o change kpp output from multiple-record state files to single-record state
2116      files analogous to write_state.F
2117    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2118      analogous to the cg2d-related output.
2119    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2120      so that writing to internal file fn (with length 512) fails.
2121    checkpoint50d_pre
2122    
2123    checkpoint50c_post
2124    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2125    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2126    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2127    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2128    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2129    
2130    checkpoint50c_pre
2131    Merging from release1_p13:
2132    o bug fix for pkg/seaice dynamic solver
2133    o Added SEAICE_initialHEFF to pkg/seaice
2134    
2135    checkpoint50b_post
2136    o store u*,v* in gU,V instead of in guNm1,gvNm1
2137    o in order to put the momForcing out of the Adams-Bashforth:
2138      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2139      to timestep.F
2140    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2141    o re-generate output for highly sensitive test-exp:
2142       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2143    
2144    checkpoint50b_pre
2145    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2146    o corrected CPP option mismatch in exf_Bulk... functions for case
2147      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2148    
2149    checkpoint50a_post
2150    o Bug fix for merging between c50 and KPP.
2151      ikey was passed from thermodynamics to kpp_calc via
2152      common block rather than being recomputed in kpp_calc,
2153      in contradiction with new key itdkey.
2154      New key ikppkey created, and tamc.h headers updated.
2155    
2156    checkpoint50
2157    - 2nd step of merge with ecco-branch:
2158      merge changes in ecco-branch back into main trunk
2159    - bug fix in find_alpha
2160    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2161    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2162    - merged some sliced AD support routines
2163    
2164    checkpoint49
2165    merged from ecco-branch:
2166    o exf:
2167      - Enable initialisation of forcing fields to constant
2168        (runtime) values.
2169      - in exf_getffields.F
2170        Reduce i-/j-loop to interior domain, discarding overlaps.
2171        That also fixes wrong TAF-key computations for key_1, key_2
2172        with bulf formulae.
2173      - exf_init.F modify #ifdef for exf_init_evap
2174      - exf_getffieldrec.F, ctrl_getrec.F
2175        The following INT-usages are not safe:
2176          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2177          fldcount = int(fldsecs/fldperiod) + 1
2178        and were modified.
2179    o autodiff: checkpoint_lev...
2180      - updated storing for bulk formulae (some arrays were missing)
2181      - added state for seaice package
2182      - synchronized with main branch
2183    o DIVA:
2184      Modif.s in
2185      - the_main_loop.F
2186      - the_model_main.F
2187      and added cost_final_restore.F cost_final_store.F
2188      o With these changes, it is possible to fully separate
2189        the first forward run to compute the cost function (mdthe_main_loop)
2190        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2191        into separate model executions.
2192        This enables better tuning of DIVA to given queue sizes.
2193      o Loss of cost function value in consecutive DIVA runs is
2194        fixed by storing to 'costfinal' file.
2195      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2196        beginning/end of adjoint integration is accounted for.
2197      The current changes apply to TAF-1.4.26.
2198      TAF has one remaining bug, requiring one manual change
2199      (see MITgcm manual).
2200    o cal: synchronized between MAIN and ecco-branch
2201    
2202    checkpoint48i_post
2203    o Changes to restore differentiability of code w.r.t. previous tag
2204      (mostly adding new routines to make list and replacing
2205      pressure by totPhiHyd).
2206    o Updated and merged grdchk package
2207      - has both ADM and TLM checks
2208      - works for single- and multi-proc.
2209      - output cleaned
2210      - worked successfully for parallel DIVA
2211    o genmake:
2212      - Adding -platform=SP4
2213      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2214    o Modif. for DIVA:
2215      ctrl_unpack should not be called in intermediate DIVA interval.
2216      (similar thing would apply for active files such as
2217      tbar, sbar, psbar, which should not be reinitialised;
2218      only relevant for ecco-branch)
2219    
2220    checkpoint48h_post
2221    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2222    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2223    o Added SEAICE_initialHEFF to pkg/seaice
2224    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2225    
2226    checkpoint48g_post
2227    --- EOS:
2228    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2229      store total Potential in totPhyHyd for diagnostics & EOS.
2230    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2231    --- Pressure/geopotential gradient:
2232    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2233    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2234      ( changes results of global_ocean_pressure )
2235    o NLFS + z-coord.: add eta*Rho' contribution.
2236    o accurate phiHyd when using interface-W at the middle between 2 centers
2237     ( changes results of ideal_2D_oce )
2238    o includes r* 2nd term in potential gradient.
2239    
2240    checkpoint48f_post
2241    Merging from release1_p12:
2242    o Modifications for using pkg/exf with pkg/seaice
2243      - improved description of the various forcing configurations
2244      - added basic radiation bulk formulae to pkg/exf
2245      - units/sign fix for evap computation in exf_getffields.F
2246      - updated verification/global_with_exf/results/output.txt
2247    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2248      (SBO) core products, including oceanic mass, center-of-mass,
2249      angular, and bottom pressure (see pkg/sbo/README.sbo).
2250    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2251      to avoid negative values in shallow regions.
2252      - updated verification/natl_box/results/output.txt
2253      - updated verification/lab_sea/results/output.txt
2254    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2255    o Added useSingleCpuIO option (see PARAMS.h).
2256    o Updated useSingleCpuIO option in mdsio_writefield.F to
2257      work with multi-field files, e.g., for single-file pickup.
2258    o pkg/seaice:
2259      - bug fix in growth.F: QNET for no shortwave case
2260      - added HeffFile for specifying initial sea-ice thickness
2261      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2262    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2263      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2264    o pkg/seaice:
2265      - adjoint-friendly modifications
2266      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2267    
2268    checkpoint48e_post
2269    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2270    o dynamics: change definition of computational domain & adapt mom_fluxform
2271      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2272    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2273        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2274        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2275        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2276        inverted_barometer solid-body.cs-32x32x1
2277      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2278    
2279    checkpoint48d_post
2280    o in preparation for r*:
2281     a) use pre-computed gradient of hydrostatic potential:
2282        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2283     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2284        => affects results of glob_oce_pressure (different truncation error)  
2285      update output.txt of ideal_2D_oce & global_ocean_pressure
2286    
2287    checkpoint48d_pre
2288    o in preparation for r*:
2289      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2290      pass the 2 comp. of the grad. as arguments to momentum S/R.
2291      but for the moment, only used if it does not change the results.
2292    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2293    
2294    checkpoint48c_post
2295    Modifications in treatment of initial flux forcing controls
2296    to avoid extra storing of flux fields.
2297    
2298    checkpoint48c_pre
2299    o Added tidal_basin_2d experiment (currently 1D!)
2300    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2301    
2302    checkpoint48b_post
2303    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2304     (modification to pressure gradient not yet implemented)
2305    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2306      (for U & V) that are used for vertical advection of momentum.
2307    
2308    checkpoint48a_post
2309    o In preparation for r*, use temp. array to compute vertical transport
2310       in flux-form momentum pkg. => change results of few test-exp.
2311      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2312                        lab_sea, natl_box & plume_on_slope
2313    
2314    checkpoint48
2315    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2316    
2317    checkpoint47j_post
2318    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2319    o moved adexch from forward_step to addummy_in_stepping
2320    o added exch in ctrl_map_...
2321    o aveFreq.=0. at end of cost_final to avoid overwrite in
2322      reverse checkpointing loop
2323    o Yet more changes in gmredi:
2324      * adgmredi_calc_tensor
2325        avoiding all recomputation of gmredi_slope_limit
2326      * adgmredi_x/y/rtransport
2327        added flag for excessive storing to avoid recomp. of
2328        u/v/rtans, dTdx/y/z
2329        -> this is not really necessary and very memory-consuming
2330      * adgmredi_slope_psi:
2331        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2332      * gmredi_slope_limit
2333        re-activated full calculation of taperfct for case 'ac02'
2334    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2335    
2336    checkpoint47i_post
2337    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2338    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2339      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2340    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2341    o gmredi: fix few bugs.
2342    
2343    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2344    This will be a good checkpoint to plug into the ecco-branch.
2345    o few modif.'s to get latest version adjointed
2346      (mainly kick out code in ini_linear_phisurf)
2347    o modif's to run adjoint with exactConserv
2348    o case GM_BOLUS_ADVEC should be cleaned
2349      S/R gmredi_slope_psi should be cleaned
2350    o verification/carbon now has exactConserv=.TRUE.
2351    
2352    checkpoint47g_post
2353    o time-average AIM output: becomes independent from statvars time-average
2354      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2355    o After TAF bug fix:
2356      Tested adjoint of gmredi package.
2357      Tests were done with checkpoint47 rather than with latest
2358      checkpoint47f_post since the latter is broken for the adjoint
2359      verification/carbon/ contains both ADM and TLM gradient checks.
2360    Here they are, before they get changed/lost/stolen.
2361    Mostly modif.'s to fix numerical sensitivities.
2362    Gradient checks OK for
2363    - GM_taper_scheme:
2364      * clipping
2365      * ac02
2366      * linear
2367      * glw91
2368      * dm95
2369      * ldd97
2370    - GMREDI_OPTIONS:
2371      * GM_VISBECK_VARIABLE_K
2372      * GM_NON_UNITY_DIAGONAL
2373      * GM_EXTRA_DIAGONAL
2374      * GM_BOLUS_ADVEC
2375    in conjunction with data.gmredi parameters to be checked in
2376    in a few minutes under verification/carbon/code/
2377    
2378    checkpoint47f_post
2379    Merging from release1_p10:
2380    o modifications for using pkg/exf with pkg/seaice
2381      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2382        and SEAICE_EXTERNAL_FLUXES
2383      - pkg/exf CPP options EXF_READ_EVAP and
2384        EXF_NO_BULK_COMPUTATIONS
2385      - usage examples are Experiments 8 and 9 in
2386        verification/lab_sea/README
2387      - verification/lab_sea default experiment now uses
2388        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2389    
2390    checkpoint47e_post
2391    o created a tag prior to creating a branch
2392    
2393    checkpoint47d_post
2394    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2395      at the bottom boundary had an erroneous half slip boundary condition
2396    o added bottom drag and no slip boundary condition capabilities to
2397      oceanic pressure coordinates code
2398    o added new verification experiment global_ocean_pressure, this experiment is
2399      also described in the tutorial section of the manual
2400    checkpoint47d_pre
2401    
2402    checkpoint47c_post
2403    o Added a verification experiment for a global cubed-sphere ocean run
2404      -  verification/global_ocean.cubed32x32x30
2405      -  uses pkg/therm_seaice and pkg/bulk_forcing
2406    
2407    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2408    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2409      when using P-coordinate; only implemented for atmospheric config.
2410    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2411      NOTES: requires option NONLIN_FRSURF to be "#define".
2412    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2413    
2414    checkpoint47b_post
2415    Merging from release1_p9:
2416    o pkg/seaice
2417      - removed GOTO's and added taf directives
2418      - double precision constants to reduce the g77 (Linux)
2419        to F77 (SGI) differences reported in release1_p8
2420    o tools/genmake
2421      - added SGI options
2422    o verification/testscript
2423      - updated to that of checkpoint47a_post
2424    o verification/global_ocean.90x40x15/input/eedata
2425      - modified for SGI f77 compatibility
2426    o verification/lab_sea
2427      - added description of sea-ice model
2428      - added missing matlab routines
2429      - added test of thermodynamics parallelization
2430    
2431    checkpoint47a_post
2432    o new pkg: aim_v23
2433     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2434       for now, keep the same surface forcing as before.
2435     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2436     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2437     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2438    o add diagnostic of surface correction term in monitor output
2439    
2440    o bulk_force and therm_seaice
2441    - Two packages:  bulk_force (Bulk forcing)
2442      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2443    - Earlier integration from Stephaine Dutkiewicz
2444      and Patrick Heimbach.
2445    - Two ifdef statements for compile time,
2446       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2447    
2448    checkpoint47
2449    differentiable version of checkpoint46n_post
2450    o bug fix in quasihydrostaticterms
2451    o * "clean" adjoint code (in terms of extensive recomputations)
2452        can now be obtained for all GMREDI options (i.e. for
2453        - GM_VISBECK_VARIABLE_K
2454        - GM_NON_UNITY_DIAGONAL
2455        - GM_EXTRA_DIAGONAL
2456        - GM_BOLUS_ADVEC )
2457      * However, wrong gradient check problem remains unsolved.
2458      * New CPP options have been introduced for different
2459        tapering schemes
2460    o external_fields_load now part of differentiation list
2461    o pressure needs multiple storing;
2462      would be nice to have store_pressure at beginning or
2463      end of forward_step, e.g. by having phiHyd global (5-dim.)
2464      (NB: pressure is needed for certain cases in find_rho,
2465      which is also invoked through convective_adjustment).
2466    o recomputations in find_rho for cases
2467     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2468    o #define ATMOSPHERIC_LOADING should be differentiable
2469    o ini_forcing shifted to begining of initialise_varia
2470    o Incorporating QNVS line search routines into MITgcm
2471      (this is separate code, and therefore not under pkg)
2472      lsopt/, optim/
2473    o Updated verification/carbon/
2474      - #define GM_VISBECK_VARIABLE_K
2475      - GM_taper_scheme    = 'ldd97'    
2476    
2477    checkpoint46n_post
2478    Merging from release1_p8:
2479    o verification/natl_box:
2480      updating new external_fields_load routine
2481    o New package: pkg/seaice
2482      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2483      The sea-ice code is based on Hibler (1979-1980).
2484      Two sea-ice dynamic solvers, ADI and LSR, are included.
2485      In addition to computing prognostic sea-ice variables and diagnosing
2486      the forcing/external data fields that drive the ocean model,
2487      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2488      The implied surface heat flux is then stored in variable
2489      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2490      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2491      non-local transport term.  Because this call precedes model
2492      thermodynamics, temperature under sea-ice may not be "exactly" at
2493      the freezing point by the time theta is dumped or time-averaged.
2494      N.B.: fairly large differences in accuracy occur across
2495            different platforms/compilers; comparison between
2496            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2497            generated output gives:
2498       T           S           U           V
2499      C D M    c        m  s        m  s        m  s        m  s
2500      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2501      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2502      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2503    
2504      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2505    o GAD:
2506      - generated new common blocks to account for call of
2507        same gad routines with differing traceridentities
2508        (needed to modify tracerIdentity indices in GAD.h)
2509      - generated separate common blocks for case useCubedSphereExchange
2510        (Department of Futurology)
2511      - parameter lists to gmredi_?transport: added tracerIdentity
2512      - added new key indices to tamc.h
2513    o external_fields_load:
2514      - added this routine to TAF list
2515      - needed to make some common blocks global and additional storing
2516        along the same lines as exf package (checkpoint_lev?_directives.h)
2517    o exf:
2518      updated external forcing package
2519      - bug fixes carried over from ecco-branch
2520        (missing OBCS_OPTIONS.h in two routines)
2521      - enable easy to use "no forcing".
2522      - added exf I/O for atmospheric loading
2523      - added exf I/O for runoff data
2524      - transfered scaling between exf <-> MITgcm to exf namelist
2525    o Adding new verification experiment global_with_exf.
2526      This verification experiment is almost identical to the
2527      global_ocean.90x40x15 experiment, except that it uses
2528      the exf (and cal) package instead of the
2529      external_fields_load routine (cf README file).
2530    
2531    checkpoint46m_post
2532    o modified testscript to return -- when there are no lines of "%MON" output
2533    o added new flag "quasiHydrostatic" for QH mode
2534      and new routine quasihydrostaticterms()
2535    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2536      New routine: mom_u_coriolis_nh()
2537    o fixed sign of non-hydrostatic metric terms in u and v equations.
2538      Depend on correct sign of gravitySign.
2539    o added work.pc* to .cvsignore in aim directories using ifc
2540    o introduced flag for controllin non-hydrostatic metric terms
2541    o removed gravitySign from PARM04
2542    o switched to g77/ifc from pgf77 in aim experiments
2543    
2544    checkpoint46l_post
2545    o made convective adjustment work with pressure coordinates:
2546     - changed the direction of k-loop in convective_adjustment.F for the
2547       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2548     - adjusted the reference pressure k-index in convective_adjustment.F
2549     - adjusted the convection condition in convect.F (in analogy to
2550       calc_ivdc.F)
2551     - convective_adjustment no longer computes anything on the halos
2552     - removed the warnings about negative salinity from find_rho.F and
2553       find_alpha.F; instead the new routine look_for_neg_salinity, called
2554       at the beginning of find_rho, find_alpha, and find_beta, does a
2555       check of the entire slice, if CPP-option
2556       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2557    checkpoint46l_pre
2558    
2559    checkpoint46k_post
2560    o fixed the verification/global_ocean.90x40x15 experiment:
2561     - new bathymetry (the world according to A., JMC, and M.)
2562     - new initial fields and forcing fields (*.bin files)
2563     - new POLY3.COEFFS (for the next release one should switch to a full
2564       equation of state: JMD95P or MDJWF)
2565     - fixed several errors and redundancies in the data file
2566     - experiment uses looped cells
2567     - added matlab directory with diagnostic scripts for plotting of output
2568    
2569    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2570     - read AIM physics parameters from a file (data.aimphys)
2571     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2572    
2573    checkpoint46j_post
2574    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2575    o move wVel computation at the end of the time step, in S/R integr_continuity
2576    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2577    o update timeave pkg for wVel diagnostic.
2578    checkpoint46j_pre
2579    
2580    checkpoint46i_post
2581    o Clean up AIM package (and keep the results unchanged):
2582      include CPP_OPTION and use IMPLICT NONE in all routines ;
2583      declare all the variables _RL ; use _d 0 for all numerical constants.
2584      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2585    
2586    checkpoint46h_post
2587    o cleaned up the use of rhoNil and rhoConst.
2588      - rhoNil should only appear in the LINEAR equation of state, everywhere
2589        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2590        and the dynamical equations are all divided by rhoConst
2591    o introduced new parameter rhoConstFresh, a reference density of fresh
2592      water, to remove the fresh water flux's dependence on rhoNil. The default
2593      value is 999.8 kg/m^3
2594    o cleanup up external_forcing.F and external_forcing_surf.F
2595      - can now be used by both OCEANIC and OCEANICP
2596    checkpoint46h_pre
2597    
2598     Added code to convert surface volume flux (fresh water) into
2599     a mass flux when using P coordinates in the ocean (OCEANICP).
2600     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2601    
2602    checkpoint46g_post
2603    o Include a new diagnostic variable phiHydLow for the ocean model
2604      - in z-coordinates, it is the bottom pressure anomaly
2605      - in p-coordinates, it is the sea surface elevation
2606      - in both cases, these variable have global drift, reflecting the mass
2607        drift in z-coordinates and the volume drift in p-coordinates
2608      - included time averaging for phiHydLow, be aware of the drift!
2609    o depth-dependent computation of Bo_surf for pressure coordinates
2610      in the ocean (buoyancyRelation='OCEANICP')
2611      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2612        Theta, Salinity, and Pressure in the parameter list. This routine is
2613        presently contained in find_rho.F. This routine does not give the
2614        correct density for 'POLY3', which would be a z-dependent reference
2615        density.
2616    o cleaned up find_rho
2617      - removed obsolete 'eqn' from the parameter list.
2618    o added two new verification experiments: gop and goz
2619      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2620    checkpoint46g_pre
2621    
2622    checkpoint46f_post
2623    o Enable tangent linear (forward mode) gradient checks:
2624      - extended active file handling to g_... files
2625      - added TANGENT_SIMULATION to theSimulationMode
2626      - extended grdchk package accordingly
2627    o added tangent linear setup in verification/carbon/code_ftl
2628    o added adjoint setup in verification/front_relax/code_ad
2629    
2630    checkpoint46e_post
2631    o Added new equation of state -> MDJWF
2632      - EOS of McDougall et al., 2002, JAOT, submitted
2633      - caveat: the equation of state is only valid for a smaller (more
2634        realistic?) range of values than JMD95P/Z and UNESCO
2635      - added masks to the calculation of pressure in store_pressure
2636      - added more check values for density in check_eos (ini_eos.F), some of
2637        the old check values are out of the range of the MDJWF-eos, so don't
2638        expect perfect matches for those
2639    checkpoint46e_pre
2640    
2641    checkpoint46d_post
2642    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2643      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2644      case of pressure coordinates. eosType='JMD95Z' in
2645      combination with buoyancyRelation='OCEANICP' now causes an error.
2646    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2647      in find_alpha/beta.
2648    checkpoint46d_pre
2649    
2650    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2651      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2652    
2653    checkpoint46c_post
2654    o Changes necessary for ocean in p-coordinates
2655     -  Added new buoyancy relation = 'OCEANICP'
2656     -  Added new parameters = gravitySign (this used to be contained inside
2657        the factor dRdZ which I added when we first switched to R coordinates).
2658     X GM/Redi is not compatible (yet)
2659     X bottom drag and no-slip need to be debugged.
2660    checkpoint46c_pre
2661    
2662    checkpoint46b_post
2663    o Added new equation of state -> JMD95Z and JMD95P
2664      - EOS of Jackett and McDougall, 1995, JAOT
2665      - moved all EOS parameters into EOS.h
2666      - new routines ini_eos.F, store_pressure.F
2667    o Added UNESCO EOS, but not recommended because it requires
2668      in-situ temperature (see JMD95)
2669    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2670      unesco.f to be used with POLY3
2671    checkpoint46b_pre
2672    
2673    checkpoint46a_post
2674    o Added (atmospheric) pressure loading
2675      - new field in FFIELDS.h, etc...
2676      - new cpp flag ATMOSPHERIC_LOADING
2677    o Changed hFacC to _hFacC in calc_phi_hyd.F
2678    o Added SHORTWAVE_HEATING to some files for consistency
2679    checkpoint46a_pre
2680    
2681    checkpoint46
2682    further merges from release1_p5
2683    o new ctrl package
2684      - adopted from ECCO environment to enable optimization
2685      - added Eliassen Palm fluxes to controls
2686    o added Eliassen Palm flux controls to gradient check package
2687    o cost package
2688      - Compatible with new ctrl package
2689      - added Eliassen Palm cost hooks
2690      - modif's of existing cost functions
2691    o Adjoint-related bug fixes in kpp:
2692      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2693      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2694    o autodiff package
2695      - flow directives:
2696        + new for S/R do_the_model_io
2697        + enhanced for S/R checkpoint
2698        + new gmredi.flow
2699      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2700        disable adcommon.h/g_common.h by default.
2701      - fixed problem for adjoint of global_max
2702    o modified verification/carbon/
2703    o New setup for adjoint of global_ocean
2704    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2705    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2706    o incorporated hooks for sponge layer code (external_forcing.F)
2707    
2708    checkpoint45d_post
2709    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2710  o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S  o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2711    (affects plume_on_slope "cg2d" output)    (affects plume_on_slope "cg2d" output)
2712    o add new parameter deltaTfreesurf for free-surface time stepping
2713    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2714  o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B  o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2715  o change phiMin in exp1 (to agree with documentation)  o change phiMin in exp1 (to agree with documentation)
2716  o add new flags:  o add new flags:

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