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revision 1.519 by heimbach, Thu Jul 28 14:35:47 2005 UTC revision 1.1016 by jmc, Tue Aug 19 21:51:09 2008 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7  o adding precip control xx_precip  o new pkg: down_slope
8  o moved ptracer ctrl index 17 -> 32    density-driven downsloping flow parameterisation (Tellus, 1999, 412-430).
9      - presently, modify T & S inland (dwnslp_calc_rho.F).
10        can be avoided if rho was stored in common bloc and used in calc_phi_hyd.
11      - implementation for ocean in P-coords not tested.
12      - add secondary test to global_ocean.90x40x15 (input.dwnslp) to check this pkg.
13    o move kSurfC,kSurfW & kSurfS from SURFACE.h to GRID.h (next to kLowC)
14      (to facilitate conversion of oceanic pkg to p-coordinate).
15    o change FIND_RHO to FIND_RHO_2D :
16      pass arguments tFld & sFld as local (tile) 2D-arrays ; +fix EOS_CHECK.
17    o new pkg: cheapaml
18    
19    checkpoint61b
20    o exch2:
21      change index bounds in rx2_cube exchanges (new S/R: EXCH2_GET_UV_BOUNDS)
22      - no longer depend on the order sequence (N,S,E,W).
23      - 3rd exchange no longer needed (tested with 24 tiles).
24      - same modif to hand-written adjoint S/R (global_ocean.cs32x15: zero diff)
25      - exch_UV_A-grid readily available (but not yet tested).
26      comment out 3rd exch call and remove copy of V to U at SE & NE face-corners
27      (both are no longer needed) in exch_uv: no effect in forward run; but
28       get truncation error differences with adjoint exch.
29    o exch2:
30     - change index-bounds storage (moved from target to local tile,
31       more intuitive this way) ; rename/remove some variables.
32     - change utils/exch2/matlab-topology-generator & code_mods accordingly.
33    
34    checkpoint61a
35    o exch2/matlab-topology-generator:
36      fix bug in index bounds for N-S internal exchange (hard to tell if this
37      had any effect on the solution).
38    o pkg/mnc: small fix in mnc_handle_err: make sure that length of msgbuf
39      is exceeded
40    o testreport: modify syntax of awk, so that it works also with
41      awk, and not only with nawk and gawk
42    
43    checkpoint61
44    o autodiff
45      Change default for TAF usage by removing argument '-nonew_arg'
46      This changes TAF subroutine argument list (ordering of active var.)
47      Omission of this flag leads to incompatibility w.r.t. TAMC
48      To restore TAMC-compatibility, need following modifs:
49      * use adoptfile tools/adjoint_options/adjoint_tamc_compatibility
50      * use CPP option #define AUTODIFF_TAMC_COMPATIBILITY
51      Tested TAF version is 1.9.22
52      N.B.: exch2 hand-written adjoint code currently not TAMC compatible
53    
54    checkpoint60
55    --->>> This is the last checkpoint for which generating the adjoint
56    --->>> is done via the TAMC-compatibility TAF-flag "-nonewarg"
57    --->>> by default.
58    --->>> Future checkpoints will ommit this flag by default.
59    o pkg/generic_advdiff, os7mp: simplify and avoid division by zero.
60    o pkg/grdchk: Add gradient check to etan0 perturbations.
61    o pkg/exf: read ice area from file (#ifdef ALLOW_ICE_AREAMASK).
62    o pkg/autodiff: more flexibility in zeroadj.
63      model/src: modifying do_oceanic_phys.F accordingly.
64    o pkg/ctrl: Bounds for (kapgm,kapredi,eddypsi) parameter estimation.
65    o model/src and pkg/gmredi: GMREDI_WITH_STABLE_ADJOINT CPP option
66      special setup of gmredi for which the adjoint is stable
67      enough for parameter optimization.
68    o bridging the gap between eddy stress and GM.
69      -> eddyTau is replaced with eddyPsi (eddyTau = f x rho0 x eddyPsi)
70          along with a change in CPP option (now ALLOW_EDDYPSI).
71      -> when using GM w/ GM_AdvForm:
72          The total eddy streamfunction (Psi = eddyPsi + K x Slope)
73          is applied either in the tracer Eq. or in momentum Eq.
74          depending on data.gmredi (intro. GM_InMomAsStress).
75      -> ALLOW_EDDYPSI_CONTROL for estimation purpose.
76      The key modifications are in model/src/taueddy_external_forcing.F
77      pkg/gmredi/gmredi_calc_*F pkg/gmredi/gmredi_*transport.F
78    
79    checkpoint59r
80    o new S/R (pkg/mdsio/mdsio_facef_read.F) reading of sNx+1 x sNy+1 array
81      from per-face file (take S/R READSYMTILE_RS out of ini_curvilinear_grid.F);
82      fix option to read coriolis(@ cell-corner) from files with CS-grid.
83    o pkg/mnc: add some attributes to standard 1D-coordinate variables
84    o pkg/diagnostics: enforce missing_value attribute for scalar variables at
85      mass points, when using mnc for output
86      - add runtime parameter (missing_value, missing_value_int) to override
87        default (which is the value of getcon('UNDEF'))
88    o pkg/mnc: prepare mnc for the actual use of missing values with the
89      diagnostics package: small fix in mnc_cw_readwrite.template and more
90      initialisation of never used fields
91      - replace mnc_common.h and mnc_id_header.h with corresponding upper case
92      versions
93    o pkg/thsice/thsice_ini_vars.F added default initial values so that
94      thermodynamics sea ice solver does not blow up when some initial fields
95      are missing.
96    o move from external_forcing_surf.F to ini_forcing.F
97      the p-coord. hack consisting in using pLoad to set phi0surf ;
98      update output of tutorial_global_oce_in_p (affected @ truncation level).
99    o Freshen up a bit hs94.1x64x5, notably:
100      remove rotationPeriod and tRef=5*0. (adjoint only), and add
101      exactConserv=.TRUE.
102    o pkg/generic_advdiff:
103      change option GAD_ALLOW_SOM_ADVECT to GAD_ALLOW_TS_SOM_ADV which only
104      applies to files where Temperature & Salinity 2nd Order moments are used.
105    o pkg/ptracers: add second-order moment advection schemes (80 and 81);
106      this uses a dynamically allocated internal state data structure
107      (#define PTRACERS_ALLOW_DYN_STATE in PTRACERS_OPTIONS.h)
108      and requires a fortran 90 compiler
109    
110    checkpoint59q
111    o pkg/mom_vecinv: Add energy & enstrophy conserving scheme (selectVortScheme=3)
112       (from Sadourny, described by Burridge & Haseler, ECMWF Rep.4, 1977)
113    o Refresh tutorial_global_oce_biogeo, notably:
114      - change bathymetry (put back seamounts in ACC, use hFacs)
115      - change EOS (POLY3 --> JMD95Z)
116      - use Bryan-Lewis vertical diffusivity
117      - use multidimensional advection
118      - remove old virtual virtual in dic pkg, now done through ptracer pkg
119      - change a couple of parameters in dic pkg
120    o pkg/ctrl: change formula in adctrl_bound.F and add a parameter to ctrl_map_ini_gen.F
121    o pkg/obcs: change default to OBCSfixTopo = .true.,
122      - set OBCSfixTopo=.false. in exp4/input/data.obcs to reproduce old result
123      - replace "debugMode" with "debugLevel .GE. debLevB"
124    o implementation of TAF directives for gchem,cfc,dic
125    o remove "exp5" (replaced by tutorial_deep_convection).
126    o pkg/obcs: add code to fix topography gradients normal to open boundaries;
127      this requires computing the index fields OB_Jn/Js/Ie/Iw in obcs_readparms;
128      the code can be turned on by setting OBCSfixTopo = .true. in data.obcs
129      --> changes results in exp4, seaice_obcs
130    o tutorial_deep_convection :
131      update the set-up and increase resolution and domain size ; start
132      from pseudo initial conditions = output at t=120mn in order to see
133      something happening when running testreport.
134    o pkg/seaice: add os7mp as an advection scheme
135                  add check for advection schemes
136                  add a flag for restoring T and S underneath sea ice
137    o pkg/my82: add netcdf-support and diagnostics
138    o thsice pkg:
139      - Now hsMax limits snow height by turning it into ice following
140        flooding scheme (and now conserving energy)
141      - Slight rewriting of the formula in thsice_calc_thick.F
142      - Parameter rhowi eliminated to be replaced by floodFac = (rhosw-rhoi)/rhos
143      --> changes results of global_ocean.cs32x15.icedyn and global_ocean.cs32x15.thsice
144    
145    checkpoint59p
146    o gchem / dic / cfc :
147      - add useDIC, useCFC , read from "data.gchem" (& hold in GCHEM.h);
148      - add new parameter files: "data.dic" & "data.cfc" ;
149      - various re-arrangement in initialisation & header file ;
150      - fix tutorial_global_oce_biogeo for multi-threaded test.
151    o pkg/dic: test for "pickup_dic" file when restarting ;
152      if no pickup-file, can restart with a re-initialised pH (same as it did
153      before) providing pickupStrictlyMatch is set to False.
154    o change argument list of S/R PTRACERS_WRITE_PICKUP & MYPACKAGE_WRITE_PICKUP
155      + fix call to S/R GGL90_WRITE_PICKUP & DIC_WRITE_PICKUP
156    o add a "warning" (to Error msg file) when an Active Tracer is not using AB-2
157      and staggerTimeStep is off (needed for stability of Internal-wave dynamics).
158    o move out of PARAMS.h & data the last pieces of old-ptracer code: tauTr1ClimRelax,
159     & lambdaTr1ClimRelax ; put those 2 params in PTRACERS_PARAMS.h & data.ptracers
160       (note: not clear to me what lambdaTr1ClimRelax is still used for ...)
161    o pkg/mom_vecinv: - new parameter "selectVortScheme" to select which
162       scheme to use for vorticty-term ;
163     - compute upwindVorticity=T case within mom_vi_u/v_coriolis_c4.F
164       (with default selectVortScheme, return to original discretisation)
165     - remove weird combination (e.g.: upwindVorticity & highOrderVorticity)
166    o pkg/seaice: add a line to the summary to indicate grid type (B/C)
167    o in mom_calc_visc, fix average value of viscAh_W & viscA4_W next to the
168      bottom ; only used with variable horizontal viscosity and non-hydrostatic.
169      also fix diagnostics VISCAHW & VISCA4W.
170    
171    checkpoint59o
172    o dome/code/obcs_calc.F: avoid division by zero (detected using gfortran).
173    o change the loop ordering in most gad_*_adv_x.F to improve vectorization:
174      move a few statemens out the main loop into separate loops
175    o pkg/shelfice:
176      - sort out freshwater flux; convert freshwater fluxes to mass fluxes
177        (kg/m^2/s), does not break tests, because in verification/isomip,
178        rhoConstFresh=rhoConst (by accident)
179      - rearrange computation of tLoc, sLoc, pLoc to make code more efficient
180      - move S/R find_rho_scalar, pkg/ecco/sw_ptmp.F, pkg/ecco/sw_adtg.F into
181        new file model/src/seawater.F, so that they are available for all pkgs.
182      - convert potential temperature into in-situ temperature. This changes the
183        isomip tests => update tests
184    o add a flag writePickupAtEnd (default=true) to be able to suppress
185      writing a pickup at the last timestep
186    o tools/mpack-1.6 :
187      - disable automake (not working) and autoconf (not needed).
188      - update to version 1.6.4 which fix MD5 code on some 64 bits platforms
189        also cleaner with much less compilation warnings.
190    o pkg/profiles:
191      rename profiles_interp_mean_genericgrid as profiles_interp_mean_gg
192      (for "less than 32 characters name" compiler requirement)
193    o pkg/obcs and pkg/exf: added capability to specify seaice open boundary
194      conditions that have a different sampling frequency than S/T/U/V obcs
195    o pkg/diagnostics (stats-diags):
196      - fix global Min/Max in case 1 processor get only empty tiles
197    o genmake2: replace (4 times)
198         make genmake_tc_1.o >> genmake_warnings 2>&1
199      with
200         COMM="$CC $CFLAGS -c genmake_tc_1.c"
201         echo $COMM >> genmake_warnings
202         $COMM >> genmake_warnings 2>&1
203      to make genmake2 always see the value of CC as specified in the optfile.
204    o generic_advdiff: - prather advection scheme (SOM) coded for CS-grid.
205      - add diagnostics for 1srt & 2nd Order moments and sub-grid variance.
206      - modify verification advect_cs test to test SOM-advection on CS-grid.
207    o pkg/ctrl:
208      - Rewrite of ctrl_map_ini_ecco.F,
209        introducing a generic routine (ctrl_map_ini_gen.F).
210      - Modification of ctrl_bound/adctrl_bound handling control vector bounds.
211    
212    checkpoint59n
213    o pkg/diagnostics: for large number of diagnostics, store diagnostic mate
214      number in dedicate array "hdiag":
215      - new version of S/R DIAGNOSTICS_ADD2LIST : DIAGNOSTICS_ADDTOLIST
216        with 1 more argument (mate number); modify old version DIAGNOSTICS_ADD2LIST.
217      - many small changes (integer format) for large number of diagnostics
218      - start to use DIAGNOSTICS_ADDTOLIST (necessary for diagnostics with
219        a counter mate) in pkg diagnostics, ptracers, thsice & aim_v23.
220    o add parameter rotateGrid and Euler angles EulerPhi/Theta/Psi. For
221      usingSphericalGrid, this allows to define the rotated grid coordinates
222      via phiMin/thetaMin/dxSpacing/dySpacing, etc., but then re-compute the
223      geographical coordinates according to the inverse of the rotation defined
224      by the Euler angles, so that Coriolis parameter and online-interpolation by
225      exf works with the geographical coordinates on XC/YC/XG/YG.
226      Naturally, this feature does not work with all packages, so some
227      combinations are prohibited in config_summary (flt, flt_zonal, ecco,
228      profiles), because there the coordinates are assumed to be regular
229      spherical grid coordinates.
230    o pkg/gmredi,ctrl,ecco,autodiff,grdchk and model/src,inc:
231      - introduce isopycnal diffusion coefficient control.
232    o tools/adjoint_options:
233      - additional control vector components.
234    o pkg/mnc: have mnc create marginally meaning full coordinate variables
235      (that is the grid indices) if usingCurvilinearGrid and NOT EXCH2
236    o pkg/mypackage:
237      - add example of read/write pickup for state-var ;
238      - add entry points to the main code for state-vars diags & write-pickup.
239    o pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
240      transitions for useExfYearlyFields
241      - add new subroutine that determines the file to read from for
242        use*YearlyFields = .TRUE. and .FALSE.
243      - add a verification experiment to global_with_exf that tests
244        useExfYearlyFields with USE_EXF_INTERPOLATION defined
245    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
246      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
247      subroutines (which could be generated from a template, because they are
248      almost identical), for now they are included in obcs_prescribe_read.F for
249      simplicity
250    o pkg/exf:
251      - add a little more diagnostic to exf_interp_read (in analogy to
252        mds_read_field, can be turned off with debugLevel < debugLevA=1)
253      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
254        ugly but fast by unrolling short inner loops, inserting a unroll=8
255        directive in routine lagran, and splitting a loop and making do while the
256        outermost loop (the latter requires the intoduction of index arrays)
257    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
258    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
259      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
260    o verification/seaice_obcs: updated for restart test and latest options
261    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
262      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
263      for now this is only available for the C-grid code and also within
264      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
265    
266    checkpoint59m
267    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
268      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
269    o gad_som : fix flux output (& diagnostics) to have same units as other  
270      advection scheme fluxes (was previously multiplied by deltaT).  
271    o added verification/seaice_obcs both to test seaice open boundaries
272      and to provide an example matlab scrpt for generating them
273    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
274    o pkg/salt_plume: clean up salt_plume_frac.F to
275      remove redundancy in PlumeMethod 1 and 4
276    o pkg/kpp: added saltplume diagnostics
277    o pkg/obcs and pkg/seaice:
278      - do not set uice and vice to zero when OB*icefile are unspecified
279      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
280      - moved seaice tracer obcs after call to seaice_growth
281    o pkg/salt_plume: added various options for salt plume depth
282      criterion and for vertical distribution of the salt
283    
284    checkpoint59l
285    o pkg/ptracers: new version of ptracers pickup:
286      read meta file and write only fields which are needed to restart.
287      ( same logic as main pickup file ; also using pickupStrictlyMatch )
288    o pkg/seaice:
289      - add timescale for melting due to warm mixed layer as a means of
290        setting SEAICE_availHeatFrac more conveniently
291      - add a CPP-flag/runtime parameter check for flooding algorithm
292      - reformulated availHeat in seaice_growth.F to be independent of AREA
293    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
294      unit changes
295    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
296    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
297      SX vector computer.
298    o pkg/seaice:
299      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
300        seaice forcing fields can now be read only through pkg/exf
301      - removed some unused halos
302    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
303    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
304      or U/VICE from U/VWIND before computing U/VSTRESS
305    
306    checkpoint59k
307    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
308      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
309    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
310      all experiments pass when compile with un-initialised var. checking option.
311    o added pkg/salt_plume
312    o script to test restart (for now, in MITgcm_contrib/jmc_script)
313    o pkg/seaice: new read/write pickup version.
314      read meta file and write only fields which are needed to restart.
315      ( same logic as main pickup file ; also using pickupStrictlyMatch )
316    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
317    o lab_sea.hb87: modify the domain & update output.hb87.txt :
318      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
319      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
320      process. Fixed here by closing the domain at the Northern boundary.
321    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
322    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
323      a set of consecutive levels in/from a 3-D array.
324    o pkg/ptracers:
325      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
326      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
327    
328    checkpoint59j
329    o in pkgs: dic, obcs, offline, rbcs:
330      standard way to compute coeff. for time interpolation between 2 time reccords
331      which retains full precision (& make results less dependent on compiler).
332      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
333    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
334      packages instead of reading ice cover and wind speed separately
335    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
336     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
337      to allow to compile customized code before the update)
338    o cleaning-up:
339      - fix CPP instruction syntax in pkg/obcs
340      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
341        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
342      - fix some threads issue in IO parts.
343    o pkg/dic:
344      - add tons of "_d 0" (--> much better testreports !)
345       and then update outputs of tutorial_global_oce_biogeo
346    o pkg/mom_fluxform:
347      add a special version of momentum advection intended to conserve momentum
348      next to a bathymetry step or a coastline edge. (default = off = #undef)
349    o new read/write pickup version:
350      - for now, only implemented for main (mdsio) pickup file.
351      - write out only what is needed to restart; merge pickup_nh , pickup_ph
352        and main pickup together.
353      - read meta file; read only what is needed to restart; stop if a field
354        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
355        if it make sense (even if the restart is not perfect).
356      - if no meta file, assume that pickup to read corresponds exactly to
357        a pickup that would currently be written.
358      - read pickup written in the old format (until checkpoint59i) if it
359        recognizes an old meta file (no field-list).
360      - add a meta file in exp. which starts from a pickup: 2 cases:
361        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
362         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
363        b) a meta file describing the content of the associated pickup file
364         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
365    o pkg/mdsio & pkg/rw:
366      - new routine to read a meta file ; new set of routine to read
367        Multiple-fields file (with meta file).
368    o added open boundary conditions capability for seaice
369        HSNOW, HSALT, UICE, and VICE
370    
371    checkpoint59i
372    o adjoint:
373      * fix multiDimAdvection adjoint
374        (partial recomputation problem by TAF for fVerT(:,:,kDown)
375        and comlev1 size definition (maxpass vs. max. number of tracers)
376      * verification/global_ocean.90x45x15 adjoint now tests
377        NLFS and multiDimAdvection using DST3 (=30)
378      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
379    o pkg/kpp: add "_d 0" to real constant (if missing);
380      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
381      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
382    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
383      for internal parameters related to restart process (formerly from PARAMS.h)
384      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
385    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
386      as argument. (only atm2d & obcs write_pickup have not yet been updated)
387    o pkg/monitor:
388      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
389      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
390      - account for deep Atmosphere factor and density factor (anelastic)
391    o added open boundary conditions capability for seaice HEFF and AREA
392    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
393      thermodynamics
394      - requires a little reorganization, which affects the testreport results
395        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
396        so that now the conservative form is tested
397      - add a few comments
398    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
399    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
400    o add new diagnostics to seaice: advective, diffusive fluxes (only for
401      multidim-advection, for scheme 2 they are not filled) and transports,
402      thermodynamic growth rates
403    o change units of EmPmR (inside the code, + within coupling interface)
404      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
405      Affects results @ truncation level (cg2d match) and update output of
406       experiments: lab_sea(6), global_ocean.90x40x15(10),
407      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
408      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
409      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
410      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
411    
412    checkpoint59h
413    o pkg/exf:
414      - improve vectorization by moving if-statement out of loops in
415        exf_mapfields, exf_radiation
416      - exf_bulkformulae.F: introduce 2D fields and vectorize code
417    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
418    o testreport:
419      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
420        monitor & update offline_exf_seaice exp. output.
421      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
422    o pkg/seaice:
423      - bug fix in the evp solver: boundary conditions were affected be
424        masking of zMax/zMin (changes results)
425      - minor bug fix in boundary conditions in seaice_calc_strainrates
426        (changes results for no_slip)
427      - seaice_lsr.F: make interpolation of eta dependent on boundaries
428      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
429      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
430        stress formulation and no-slip boundary conditions
431    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
432      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
433    o pkg/seaice: a first HSALT time stepping equation has been checked in
434    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
435      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
436      without requiring DO-IF statements
437    o pkg/thsice:
438      use continuous power-law function for partition of energy between lateral
439      melting/freezing and thinning/thickening ; old code using step function
440      still available with #undef THSICE_FRACEN_POWERLAW
441      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
442    o testreport: change AD testing : check against results/output_adm.txt
443      using same scripts as for forward test.
444    
445    checkpoint59g
446    o adjoint testing: in preparation for changing testreport:
447      - output format: cost and grad written on separated lines
448      - ad output results in directory "results" (instead of "results_ad")
449    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
450    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
451    o pkg/ecco: allow user defined cost function contributions
452    o testreport:
453      Allow to choose (per experiment) the list of tested output variables
454       and the main variable (used to issue a pass/FAIL ) ;
455      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
456      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
457      Also modify printing of summary:
458       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
459       b) echo the list of tested variables in the individual summary.txt of
460          each experiment.
461    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
462      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
463      (but still depend on the tile decompostion of the domain).
464    o pkg/seaice: change a discretization detail to make the B-grid code
465      "more symmetric". This change is likely to remove all "ridges/leads" that
466      where quasi-aligned with the grid in B-grid solutions. It may also be
467      the solution to the stress coupling issues with the B-grid.
468    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
469      remove .cvsignore from input dir. (since testreport no longer run here).
470    o pkg/thsice:
471     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
472     - fix reshaping of sea-ice just after advection:
473       melt all the ice only if ice-volume is too small.
474     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
475       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
476     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
477    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
478      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
479    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
480      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
481      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
482      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
483      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
484      -> update output.txt
485    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
486     this affects truncation error: -> update output.txt of exp:
487      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
488      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
489    
490    checkpoint59f
491    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
492    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
493      a bounded range (in forward mode)
494    o pkg/ecco, ctrl, autodiff and mom_common:
495     internal parameter controls, completements of implementations
496    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
497    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
498      (not seem any difference in testing results).
499    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
500       at face corners.
501    o pkg/generic_advdiff:
502     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
503      loop range indices for computing vertical advection tendency
504      and do the calculation in the interior only (no overlap) ;
505      for now, only implemented for SOM advection (to save CPU time).
506     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
507    o exch2 adjoint
508      First set of changes:
509      - add exch2 hand-written adjoint templates
510      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
511        This will require cleanup in pkg/autodiff/*.F
512        (changed routines currently kept separate in verif. code/)
513      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
514        that used to hide exch2 or cubed-sphere specific code
515        (commented via 'cph-exch2')
516    o pkg/seaice
517      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
518    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
519       output of global_ocean.cs32x15.thsice .
520    
521    checkpoint59e
522    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
523      for B-grid vector (not yet tested) and C-grid vector (<- only used
524      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
525    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
526      (#ifdef ALLOW_SALT_PLUME)
527    o gather_2d/scatter_2d: removed halo regions
528    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
529      scheme and the corresponding test case (under front_relax dir). For now,
530      only available with Skew-flux form and not yet tested in realistic set-up.
531      adjoint: store directives updated, but gradient checks deteriorated,
532      so maybe GM/Redi adjoint is now broken.
533    o seaice adjoint
534      * add AREA, HEFF, HSNOW as control variable
535        (should not change lab_sea results)
536      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
537    o pkg/seaice:
538      * added computation of saltFlux in seaice_growth;
539        For time being, sea ice salinity is assumed constant
540        contribution of snow flooding to freshening of sea ice is neglected.
541        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
542        defaults to 0.0 in order to maintain backward compatibility.
543        Typical values for SEAICE_salinity are 4 to 10 g/kg.
544      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
545      * added SEAICE_availHeatFrac, which specifies fraction of surface level
546        heat content used to melt or grow ice
547      * commented out cap of HICE: it helps keep ice thinner
548      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
549      * applied OBCS T/S mask to HEFFM sea ice mask
550    
551    checkpoint59d
552    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
553     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
554     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
555    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
556     and change default value of parameter "GM_Small_Number";
557     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
558       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
559       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
560    o pkg/ecco: cost function when applying pkg/smooth to controls
561    o pkg/ctrl: add forcingPrecond run time parameter
562    o pkg/seaice:
563     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
564     - fix bug in metric terms of u-equation in LSR solver (implicit part),
565       changes verification/lab_sea
566     - rearrange implicit part of u-equation in LSR solver to make it easier to
567       read, understand, and debug. This causes changes at the truncation level.
568     - fix (serious) bug in the boundary conditions (sign error in the implicit
569       part) of the LSR solver. Changes all LSR results.
570     - fixed problem with HSNOW initialization to avoid thick snow when AREA
571       is initilized with small values - does not change lab_sea results.
572     - added HsnowFile initialization capability
573    o pkg/smooth: addition to model/src and pkg/ctrl so allow
574     initialization of pkg/smooth and application to control vector
575    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
576    o dependencies: pkg/profiles requires pkg/cal
577    o pkg/profiles:
578     - added option ALLOW_PROFILES_GENERICGRID
579         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
580         that interpolation information (grid points and coefficients) is provided
581         within the netcdf input files.
582         -> sample matlab scripts can be found in MITgcm_contrib/gael
583         that allow you to prepare netcdf input files.
584     - also modified: cleaner include statements, cleaner error print statements,
585       cleaner stops when error, and more tests of the netcdf input files consistency.
586    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
587    o pkg/seaice:
588     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
589       requires a new routine: seaice_diagnostics_fill.F
590     - make sure that seaice does not move if not forced (pressure replacement
591       method, Hibler and Ip, 1995), changes results
592     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
593     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
594       It is turned off by default (=-1.), because it changes the results.
595     - make it possible to read AREA from a file, too.
596    
597    checkpoint59c
598    o add S/R and diagnostics for oceanic mixed-layer depth
599    o move GMRedi call after all vertical mixing schemes (including KPP)
600    o pkg/thsice:
601     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
602      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
603    o pkg/obcs:
604     - bug fix for balance code
605    o pkg/seaice:
606      - allow values of SEAICE_elasticParm > 1
607      - add new parameter SEAICE_evpTauRelax as an alternative
608        to SEAICE_elasticParm
609      - make lsr boundary conditions free slip (by default), changes result
610      - add code for no slip boundary conditions for lsr
611      - set minimum of zeta to zero (and not 4e8) (changes results)
612      - add a cap on AREA after advecting AREA if seaice_growth is not called
613    o change calculation of Visbeck K:
614      - no longer depend on tapering scheme; instead, compute slope (limited
615        by GM_maxSlope). this is equivalent to what was comuted before with
616        clipping or linear tappering.
617      - fix vertical averaging (wrong by 1/2 level)
618      - leave the old version (but will not be maintained) within
619        #ifdef OLD_VISBECK_CALC / #endif
620      - update output of exp. ideal_2D_oce
621    o change error catch in calc_r_star to improve vectorization
622    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
623      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
624    o adjoint:
625      Re-organized adjoint checkpointing according to Matt Mazloff
626      (but with modifs/completions/cleanups)
627      Storing is now bundled into large arrays to optimized I/O
628      (and second step in cleanup of the_main_loop)
629    
630    checkpoint59b
631    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
632      - export/import (between ocean & coupler) fields needed for ocean DIC.
633    o pkg/seaice:
634      - get rid of three more exchanges seaice_calc_viscosities (required
635        different loop boundaries in seaice_lsr and seaice_ocean_stress)
636      - bug fix in seaice_ocean_stress (update of lab_sea required)
637      - reduce loop boundaries to necessary minimum also in seaice_evp
638      - go back to the old way of computing deltaC/Z as the adjoint likes that
639        better
640    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
641      passive tracer to an Age Tracer) + update output.txt
642    o pkg/exf:
643      - implement A-grid / C-grid selection for wind-stress input files.
644      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
645      for now, in exf_bulk_largeyeager04.F only :
646      - change implementation for case where windspeed + 2. components wind-stress
647        are read-in. AND use rhoConstFresh to convert evap.
648    o pkg/seaice:
649      - use correct EXCH_UV for wind-forcing (on A-grid).
650      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
651        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
652    o pkg/exf:
653      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
654      EXF_INTERPOLATION:
655      - merge global_with_exf/code version of exf_interp_read.F
656        to the main code ;
657      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
658        reading the file ; Important: This options needs to be defined to recover
659        previous code.
660        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
661      - no longer loose real*8 precision along the way when using exf_iprec=64.
662    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
663      - change discretisation of evp-solver in order to avoid another exchange
664        (changes lab_sea) and clean up a little
665      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
666        help the adjoint (this also changes the results slightly)
667      - add a few "_d 0" where they had been missing in seaice_evp.F
668      - cleaning up: remove unused seaice_calc_rhs.F
669    o pkg/exf: some cleaning-up:
670      - change various "constants" into runtime parameters
671      - cleaned-up Large&Yeager04 routine which should eventually
672        replace exf_bulkformulae.F (changed names of S/R and CPP)
673        and merged various ALLOW_ATM_WIND options
674     only used with thsice pkg (in thsice_get_exf.F):
675      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
676        which are used when useStabilityFct_overIce=TRUE (= the default)
677      - change default values of ice & snow emissivity and scale downward LW
678        by ice & snow emissivity.
679    o pkg/thsice:
680     fix few little problems, in thsice_calc_thickn.F:
681      - growth vertically (and not laterally) if iceFrac == iceMaskMax
682      - melt only laterally if hIce < hThinIce (as the comments say)
683      and in thsice_extend.F:
684      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
685      - start to form ice as soon as the minimum ice-volume is reachable.
686     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
687      and cpl_aim+ocn
688    o pkg/kpp
689     - move computation of surface related input fields to KPP into a new
690       subroutine kpp_forcing_surf.F
691     - remove wrong (within bi,bj loops) EXCH calls.
692     - little cleaning (add argument myThid in last position, cvs header ...)
693     - for now, fix conservation problem by exchanging KPPviscAz (may not
694       be the best fix)
695    o pkg/seaice
696     - check for inconsistent evp parameter/cpp-flag combination
697     - remove leftover errIO flat for obsolete name list error handling
698    o OpenAD
699     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
700    
701    checkpoint59a
702    o pkg/seaice: some parameter clarifications and a little bit of clean up
703    o pkg/thsice: rename run-time parameters:
704       himin       -> hIceMin
705       himin0      -> hThinIce
706       hihig       -> hThickIce
707       i0          -> i0swFrac
708       transCoef   -> bMeltCoef
709       frac_energy -> fracMelting
710      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
711       with default values (for now) that do not change the results.
712      remove old version of thsice vars advection in pkg/seaice.
713    o in FFIELDS.h:
714      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
715      - make pLoad & sIceLoad always available (but still only used if
716         ATMOSPHERIC_LOADING is #define).
717    o pkg/kpp: replaced _KPP_RL with _RL
718    o bug fixes for vertical diffusivity computations when both KPP and
719        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
720        are no longer updating the vertical diffusivity array
721        (passed as argument) but are (re-) setting those arrays.
722    o pkg/seaice: fix bug in evp solver, while doing that
723      - change (improve?) discretization of stress computations for both
724        cgrid-lsr and evp solver
725      - add a new routine to compute strain rates
726      - the above changes lab_sea results
727      - add no slip conditions for evp solver (off by default), lsr-version
728        may follow
729      - fix exchange for shear at Z-points (does not change lab_sea)
730      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
731        (to force the user to pick a time step since there is not "safe" way
732        of choosing it)
733      - add principal stress diagnostics
734      - rearrange fields for evp a little to avoid having to call a: too many
735        exchanges and b: exchanges for stress trensor components which we do
736        not have.
737      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
738        of evp, complete rewrite for lsr case (latter is does not yet work
739        in all cases)
740    o pkg/kpp: add code to have mixing in shelf ice caverns
741      - add myThid to all kpp routines (long overdue)
742    
743    checkpoint59
744    o pkg/exf:
745      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
746        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
747      - move exf header files from lower_case.h to UPPER_CASE.h ;
748        add missing cvs Header & Name
749      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
750      - add namelist param. selectStressGridPosition, exf_monFreq
751      - retire many _CLIM routines, and remove data.exf_clim
752        + params moved to data.exf
753        + climsst, climsss now handled by exf_set_gen, i.e.
754          climss?period=0 refers to constant field,
755          climss?period=-12 to monthly forcing
756      - split up namelists in data.exf
757    o pkg/seaice:
758      - remove seaice_exch and seaice_exch_uv
759      - remove superfluous exchange of theta
760      - add myThid to seaice_budget_ocean/ice
761      - add new interface for atmospheric wind forcing (C-grid only)
762        + new routine
763        + two new field (taux, tauy for stress over ice)
764        + removed one global field (DAIRN) for C-grid case only
765    o pkg/thsise
766      - 2nd set of modifs for thsice adjoint in conjunction with exf
767    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
768    
769    checkpoint58y_post
770    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
771      vertical diffusivity, similar to that in MOM4; turned on using
772      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
773      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
774    o Added capability for 3D specification of background vertical diffusion
775      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
776      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
777      "data" file that contains the 3D vertical diffusivity coefficients.
778    o ice dynamics (pkg/seaice) with thsice thermodynamics:
779      - add code within pkg thsice to advect & diffuse sea-ice fields
780      similar to (and will replace) what has been added in  seaice_advdiff.F,
781      but: - conserving Mass, Heat & Salt.
782           - better when using non-linear advection scheme (not yet fully tested)
783           - can also be used in atmospheric set-up (for now, only the diffusion).
784    
785    checkpoint58x_post
786    o IO option for global-file compact format:
787      - add options when generating topology (utils/exch2/matlab-topology-generator)
788      - add I/O capability (pkg/mdsio).
789      - adapt utils/matlab/rdmds.m to read this format.
790      for now long-line format not yet supported by pkg/mdsio (& exch2).
791    o shelfice: add a few diagnostics
792    
793    checkpoint58w_post
794    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
795      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
796      (and replace horiVertRatio in NH code).
797      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
798                         and tutorial_plume_on_slope (sensitive to truncation)
799    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
800      directly to drive seaice model (C-grid only)
801    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
802     - reintroduce computation of wind from stress,
803     - compute tau (in exf_bulkformulae.F) from windstress averaged to
804       mass points to avoid tau = 0
805     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
806    o rdmnc.m: make it work with "global" files created with gluemnc
807    o rdmnc.m : some improvements in dealing with singleton dimension
808      (tested on all testreport mnc output files).
809    o genmake2: disable pkg/profiles if netcdf test fails.
810    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
811    o move call to cal_readparms up to make calendar parameters/variable available
812      to all packages
813    
814    checkpoint58v_post
815    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
816      useDynP_inEos_Zc tested.
817    o pkg/exf: changes to properly interpolate/mask/scale initial fields
818    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
819      and portions thereof.  See read_cs.txt for description and examples.
820    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
821      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
822      following the great-circle arc between those 2 points.
823    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
824      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
825    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
826     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
827     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
828     - still needs work (not working with some options ; efficiency to improve)
829       and serious testing.
830     - use this scheme for temperature & salinity in 2 advection test exp.:
831       advect_xy & advect_xz, respectively.
832    
833    checkpoint58u_post
834    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
835    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
836    o testreport: add option "-skipdir" to skip some test.
837    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
838      momentum calculation.
839    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
840    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
841      remove checkpoint.F and the_correction_step.F (no longer used);
842      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
843    o add option (linFSConserveTr) to correct for tracer source/sink due to
844      Linear Free surface
845    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
846    o pkg/thsice: fix reading mnc-pickups
847    
848    checkpoint58t_post
849    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
850    o pkg/mdsio:
851     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
852       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
853       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
854     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
855     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
856       either MDS_READ_FIELD or MDS_WRITE_FIELD )
857     - new S/R (to replace MDSWRITEMETA), which allows to write more
858       informations (variable names, time ...) to meta files.
859     - modify rdmds.m to give back the meta file content.
860    o pkg/diagnostics: change vertical interpolation to be safer, and more
861       flexible (define p-levels to interpolate to in data.diagnostics);
862      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
863       diagnostic pointer.
864    o pkg/seaice: more cleaning up of seaice_growth, added many comments
865    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
866    o fix multi-category seaice:
867     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
868       SEAICE_MULTICATEGORY
869     - fix short wave heat flux
870    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
871       and allow to use EVP solver. Change forward lab_sea: test both EVP
872       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
873    o Initial check-in of lab_sea adjoint
874      (very similar to natl_box_adjoint/code_seaice)
875      * used C-grid and EVP solver
876      * used KPP, GM/Redi
877      * uses inAdExact=.TRUE.
878      * gradient checks fail for both ADM and TLM
879        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
880        f.d. gradients actually seem more problematic than ADM, TLM gradients;
881        issue is related to forward mismatch between g77 an ifort
882    o pkg/seaice: overhaul of thermodynamics
883     - growth.F and groatb.F are replaced by new routine seaice_growth.F
884     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
885     - move a few global fields out of SEAICE.h into seaice_growth.F and
886       make them 2D (FICE/QNETO/ ...)
887     - remove FO (it is the same as QNETO)
888     - introduce a few local fields to avoid modifying external fields such
889       as atemp, etc.
890    
891    checkpoint58s_post
892    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
893      changed exf_set_gen.F so that
894        genperiod=0 means input file is one time-constant field and
895        genperiod=-12 means input file contains 12 monthly means
896    o CG2D: use pre-computed solver main-diagonal (stored in common block);
897      this affects truncation error ; generate new output file for exp. which
898      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
899        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
900        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
901        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
902        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
903        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
904    o start implementation of deep-atmosphere and anelastic formulation
905    o verification: remove 2nd copy of input files and use script "prepare_run"
906      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
907    o mom_common/vecinv/fluxform: fix a few initialisation isssues
908    o profiles: fix for multithreaded case
909    
910    o diagnostics: rename few diags:
911      s/'PRESSURE'/'RCENTER '/g
912      s/'TICE    '/'oceFreez'/g
913      s/'TAUX    '/'oceTAUX '/g
914      s/'TAUY    '/'oceTAUY '/g
915      s/'SWFLUX  '/'oceQsw  '/g
916      s/DIFx/DFxE/g
917      s/DIFy/DFyE/g
918      and add few ocean-forcing diagnostics:
919      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
920    o modifications to pkg/seaice/growth.F and budget.F, which change results of
921      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
922      as actual snow thickness.  It now refers everywhere to effective snow
923      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
924    
925    checkpoint58r_post
926    o modifications to pkg/seaice/growth.F, which change results of
927      lab_sea experiment: fixes pertain to melting snow over open water, to
928      masking EVAP under sea ice, and to using the correct AREA variable for
929      computations of EVAP, PRECIP, HSNOW, and GHEFF
930    o add ability to read bathy, salt, and theta using MNC (off by def)
931    o add flooding algorithm and advection of HSNOW for pkg/seaice;
932      both are turned off by default and do no change any results
933    o seaice advection with pkg/thsice: a step toward the use of non-linear
934      advection scheme, but #ifdef or commented out for now (requires more EXCH).
935    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
936      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
937      in natl_box (affects results @ truncation level: update output.txt)
938    o multi-threading and IO:
939      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
940      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
941        (needed to work with SingleCpuIO): tested in all verif. exp.
942    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
943      affects the results (but none of the verification test uses this scheme).
944    o Adding some pkg/diagnostics capability to pkg/seaice
945      (will certainly be subject to changes)
946    o ctrl: adding new control variables:
947      lwflux, lwdown, evap, snowprecip, apressure, runoff
948    
949    checkpoint58q_post
950    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
951      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
952      high_res_cube configuration by 4% on Columbia.
953    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
954      add (in global_with_exf/code) a version of EXF_INTERP_READ without
955      dynamical allocation (seems to work in multi-threaded).
956    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
957      single CPU io) so that TAF does not have to see EESUPPORT.h
958    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
959    
960    checkpoint58p_post
961    o obcs: stop if obcs is used with useCDscheme = .true.
962    o shelfice:
963     - fix a sign error so that no slip at shelfice interface works
964     - remove stop for combination non-hydrostatic code and shelfice. That does
965       not mean, that the results are correct, but at least they are numerically
966       stable
967    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
968    o added adjoint exch routined for all exch*3d* routines
969      and updated flow directives
970    
971    checkpoint58o_post
972    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
973      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
974    o change controling S/R for writing pickup file (new S/R do_write_pickup)
975      and clean-up reading/writing of pickup files.
976    o fix local version of read/write pickup (NH part) in rotating_tank/code
977    o simplify EXCH interface:
978     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
979     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
980    o added the regrid package
981    o shelfice:
982     - add a simple boundary layer scheme to reduce noise
983     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
984    
985    checkpoint58n_post
986    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
987       local variable (not in common block).
988    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
989      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
990      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
991        to work with SingleCpuIO.
992    o add "_d 0" to real constant of pkg/cfc subroutines ;
993       update exp. cfc_exemple & tutorial_cfc_offline output files.
994    o multi-threading and IO:
995      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
996        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
997      - barrier before and after reading.
998      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
999      - avoid using MDS_WRITELOCAL for LAND pkg output.
1000      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
1001        common-block variables ; Allows multi-threading with master-thread IO.
1002    o change default MAX_NO_THREADS from 32 to 4 ;
1003      and stop cleanly when MAX_NO_THREADS is too small.
1004    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
1005    
1006    checkpoint58m_post
1007    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
1008       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
1009    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
1010       keep global_ocean.90x40x15 (for AD testing) with former secondary test
1011       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
1012    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
1013        add MITgcm_tutorials (= code + all the tutorials)
1014    o ecco, option to compute cost for total ssh (mean+anom)
1015    o consistent with addition of ptracer and ssh in pkg/profiles
1016    o profiles: adding ptracer and ssh
1017    o testreport: change multi-test output-file name
1018      (from output.txt.{name} to output.{name}.txt)
1019    o profiles: now ok for mutli-tiles case
1020    o seaice: add 4 parameters for different advection schemes for area,
1021      (effective) seaice thickness, enthalphy, and snow height. Their default
1022      is the standard parameter SEAICEadvScheme
1023    o calc_gw:
1024     - add cosFacU in zonal viscous flux (harmonic.visc.).
1025     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
1026       of tutorial_plume_on_slope.
1027    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
1028    o calc_gw: true flux-form, account for horizontal grid spacing.
1029      update rotating_tank results, but not plume_on_slope (affected at
1030      truncation level, 11 digits).
1031    
1032    checkpoint58l_post
1033    o calc_gw:
1034     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
1035     - remove side-drag for now (need to fix it); update plume_on_slope results.
1036     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
1037    o commit code to make SST/SSS weights spatially variable
1038      (based on either variable in-situ or variable initial T/S weights)
1039    o pkg/ecco:
1040      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
1041        now based on horizontally varying weights wthetaLev, wsaltLev
1042      * cost_averagesflags now returns year indices in addition to day, month
1043      * sflux balance is performed on annual basis
1044        (sflxumm, sfluxmm2, bal_sfluxmm)
1045      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
1046        including separate counting and multipliers
1047    o pkg/rbcs
1048      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
1049    
1050    checkpoint58k_post
1051    o testreport:
1052     - always build in dir. "build" (if not there, mkdir build instead of building
1053       & running in input)
1054     - run in dir run (if it exists), in build otherwise.
1055     - call prepare_run (if input/prepare_run exists)
1056     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
1057    o pkg/exf modifications to interpolation and rotation routines for more
1058       reasonable treatment of North Pole singularity: for tracers North Pole
1059       value is set to northernmost zonal-mean value, for zonal velocity it is
1060       set to zero, and for meridional velocity it is set to northernmost value.
1061    o pkg/exf/exf_check_range.F
1062     - add tile index to diagnostics and move stop statement to the very
1063       end of the routine.
1064    o pkg/diagnostics: (diagnostics_main_init.F)
1065      define title of isomorphic variables according to the current config.
1066    o pkg/thsice with pkg/seaice dynamics:
1067    - fix domain of computation (interior only, required for exf) and do exchanges
1068    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
1069    o towards a standard way of dealing with multi-threading in MONITOR
1070      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
1071    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
1072       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
1073    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
1074    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
1075    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
1076       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
1077    o tracer advection:
1078     - clean-up and simplify calc_common_factors.F
1079     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
1080       advection subroutine (but still not used within DST advection S/R)
1081    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
1082    
1083    checkpoint58j_post
1084    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
1085      from file (collects calls previously in FORWARD_STEP)
1086    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
1087    o adjoint store dir. adjusted accordingly
1088    o genmake2
1089      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
1090    
1091    checkpoint58i_post
1092    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
1093      on wind stress (SEAICEstressFactor defaults to 1.)
1094    o Total number of Timers is finite (<=40): comment out 2 non-essential one
1095      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
1096    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
1097      on CS-grid: no longer loosing mass.
1098    o exf & curvilinear-grid: no longer modify longitude xC & xG.
1099    o pkg/ggl90: fix sloppy output and fix a bug
1100    o pkg/seaice: added SEAICEuseEVPpickup parameter
1101      - Set to false in order to start EVP solver with
1102        non-EVP pickup files when using SEAICEuseEVP
1103      - fix sign error in diffusion in seaice_calc_rhs
1104    
1105    checkpoint58h_post
1106    * Modifications for bottom topography control
1107      o replace hFacC by _hFacC at various places
1108      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
1109      o add non-self-adjoint cg2d_nsa
1110      o update autodiff support routines
1111      o re-initialise hfac after ctrl_depth_ini
1112      o works for 5x5 box, doesnt work for global_ocean.90x40x15
1113    * Adding verification for 5x5 box (4-layer) bottom topography control
1114    
1115    checkpoint58g_post
1116    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
1117       used for mean seasonal cycle, mean diurnal cycle); add an example
1118       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
1119    o pkg/ggl90:
1120      - add parameter (minimum surface kinetic energy)
1121      - fix bug (avoiding division by zero)
1122    o couple pkg/thsice to pkg/seaice:
1123      - modify advection in seaice to accomodate new scalar fields to be advected
1124      - only muliDimAdection scheme work with seaice/thsice
1125      - mapping of thsice-variables to seaice-variables, back and forth
1126      - does not break the verification experiments, but does not give the
1127        desired results either
1128    o pkg/seaice
1129      - make (default) second order advection a bit less confusing?
1130    
1131    checkpoint58f_post
1132    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
1133      to pkg/seaice):
1134      - new routines thsice_map_exf and thsice_get_exf provide the interface
1135      - add an additional formal parameter to thsice_solve4temp
1136    o pkg/exf:
1137      - add new fields wspeed, snowprecip (to be able to couple to thsice)
1138      - correct Stefan-Boltzmann constant
1139      - new parameter for longwave surface emittance
1140      - separate some stuff from exf_bulkformulae into new routines  
1141        exf_radiation, exf_wind
1142      - add new parameters and constants: longwave emissivity for ocean, ice
1143        and snow, evaporation parameters over ice
1144      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
1145        either wind from stress or stress from wind
1146    o pkg/thSIce:
1147    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
1148    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
1149       and THSICE_CALC_THICKN
1150    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
1151    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
1152      to make debugging easier.
1153    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
1154    o pkg/bulk_force:
1155      - clean-up comments and parameters ;
1156      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
1157    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
1158      generate new output for test-experiment: aim.5l_cs.thSI
1159    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
1160      testreport accordingly
1161    
1162    checkpoint58e_post
1163    o SEAICE_CGRID adjoint done
1164    o R_STAR adjoint implemented.
1165      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
1166      * need to sort out init. of h0facc, etc.
1167    o Make pkg/profile fully independent of ecco,cost, etc. stuff
1168      to be able to use it in pure forward.
1169    
1170    checkpoint58d_post
1171    o upgrade simple test-experiment to tutorial example:
1172     step.1: duplicate the experiment and (step.2) will remove the old copy.
1173      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
1174      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
1175      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
1176      tutorial_global_oce_biogeo    <- copy of dic_example
1177      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
1178      tutorial_plume_on_slope       <- copy of plume_on_slope
1179      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
1180      tutorial_global_oce_optim     <- empty for now (David ?)
1181      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
1182     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
1183    o correct a sign problem in cost_scat.F
1184    o obcs and ptracers: fix boundary conditions for advections schemes
1185      with larger stencil
1186    o thsice adjoint: start
1187    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
1188      completeness
1189    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
1190      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
1191    o ptracers adjoint:
1192      * avoid extensive recomputatations
1193      * fix missing re-init. of gptr (missed by TAF)
1194    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
1195      me to turn off the excessive output to STDOUT that this package produces
1196    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
1197      and add those terms in Vector-Invariant formulation.
1198    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
1199      if the control period (xx_hfluxperiod etc) is 0
1200    o in profiles pkg, clean routines and fix details
1201    o in ecco pkg, reading ssh data:
1202      fix problem in case the model does not start at iter0=0
1203    o fix mnc-pickup/restart for ptracers
1204    o new package prifiles:
1205      code to compute profile-based cost by Gael Forget
1206      (modifs in ecco, ctrl, autodiff)
1207    o Benign bug fix in initialization (spotted by M. Mazloff) of
1208      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
1209    
1210    checkpoint58c_post
1211    o adjoint: finish NLFS adjoint and provide reference output in
1212      verification/global_ocean.90x40x15/results_ad_nlfs
1213    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
1214      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
1215      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
1216      with SEAICE_CGRID defined.
1217    o move calendarDumps from "data" to "data.cal" and clean-up the code
1218      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
1219    o add useEXF & useCAL flags (for now, set in hard-coded way)
1220    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
1221      (were missing in NH mode, and wrong in quasihydrostatic mode).
1222      waiting for Chris updated version of calc_gw to add those CALLs.
1223    o fix bug in quasihydrostatic S/R ;
1224      add a test for this option: global_ocean.90x40x15.qshyd
1225    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
1226      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
1227    o add on/off flag useOffLine for package OFFLINE
1228    o seaice:
1229      - modify advection so that it works also on the C-grid
1230      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
1231        problem in multi-tile runs with C-grid
1232      - add flags for clipping ice velocities and/or masking solver forcing
1233      - fix drag (ocean on ice) formulation and a bug that caused noise in the
1234        C-grid solver
1235      - added a few comments to seaice_diffusion.F
1236      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
1237        are now exclusive)
1238      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
1239        required re-ordering the code a little:
1240       + make DAIRN global variable (defined in SEAICE)
1241       + move computation of the viscosities eta and zeta into a new separate
1242         routine (because I need to recompute them in seaice_ocean_stress.F)
1243    
1244    checkpoint58b_post
1245    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
1246      update output.txt of exp. aim.5l_cs.thSI
1247    o various mnc cleanups and improvements:
1248      + shrink lookup tables by factor of ~4
1249      + better error reporting when running out of lookup space
1250      + able to handle longer path/file names (up to 500 chars)
1251    o adjoint:
1252      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
1253      - TBD: "hidden" mom_vecinv recomp. in dynamics
1254    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
1255     (allow to differentiate between forcing components using new integer flags:
1256      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
1257     and add new flag to put Dissipation tendency out of Adams-Bashforth.
1258    o ecco
1259      - enable trend removal from SSH anomaly obs.
1260    o adjoint
1261      - a fix for PmEpR when #undef EXACT_CONSERV
1262      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
1263      - try to fix "hidden" recomp. in forward_step for NLFS
1264        (NLFS seems broken sometimes after I checked it in)
1265    o seaice:
1266     - add c-grid version of the dynamic solver:
1267       + three new routines that are the c-grid substitute lsr, dynsolver
1268         and ostres
1269       + put a few fields that were local to dynsolver into global common
1270         blocks, so that I can move the computation of stresses etc into
1271         seaice_lsr (saves coding but may break the adjoint).
1272     - replace more hardwired parameters by runtime parameters
1273     - add ice masks that mask the rhs of the implicit solvers where there
1274       is no ice (commented out in seaice_dynsolver, because i am not sure
1275       if this works properly), eventually this should replace the clipping
1276       of ice velocities in seaice_dynsolver to +/-40cm/s.
1277    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
1278      include it only where its needed
1279    o move balancing of fluxes before the call of external_forcing_surf
1280    o seaice:
1281      - correct units of turning angles (now they are really in degrees)
1282      - move computation of GWATX/Y out of main routine into dynsolver
1283      - initialize GWATX/Y in seaice_init
1284    o Apply mask on Fresh-Water flux (needed for SSH forcing).
1285      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
1286    o seaice: add runtime flags for turning angles (default to zero)
1287    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
1288      and trend from exf forcing and ctrl control adjustments
1289    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
1290      (since checkpoint57x_post)
1291    o change the default rotation period to 86164.s = the Earth rotation
1292    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
1293      and based on a reference stratification. Tested within hs94.cs-32x32x5.
1294    o seaice advection: add code for choosing between the default (2nd order
1295      central differences) and multiDim advection schemes provided by
1296      pkg/generic_advdiff
1297    o seaice:
1298      - removed all references to SEAICE_GRID.h fields from
1299        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
1300        (cubed-sphere configuration will change a little)
1301      - grid computations in seaice_init are obsolete now.
1302      - cleaned up code a little so that is easier to read (hopefully).
1303      - added new (better?) discretizations of default advection and diffusion
1304        (turn on with SEAICEuseFluxForm)
1305      - replace 1 in 3d global fields by kSurface in growth.F
1306      
1307    checkpoint58a_post
1308    o seaice:
1309      - bug fix in advect.F
1310    o shelfice:
1311      - separate shelfice load anomaly from pload (breaks with time
1312        dependent forcing), => introduce constant field shelficeLoadAnomaly.
1313        Its default is 0., but it may be computed more cleverly from (unknown)
1314        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
1315        done offline. A good approximation of the pressure load anomaly is
1316        necessary to avoid large initial adjustment processes underneath
1317        deep-reaching shelfice.
1318      - small fix in ISOMIP shelfice_thermodynamics
1319      - add more sophisticated thermodynamics of Hellmer (1989), this is
1320        now the default
1321      - give a few constants more intuitive names
1322    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
1323      if bulk formulae are used in long integration (especially EmPmR). Turn
1324      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
1325      if balancePrintMean, the imbalance that is substracted is printed to
1326      STDOUT.
1327    o fix bug (typo) in obcs_apply_eta.F
1328    o add a new package shelfice which enables us to model the circulation
1329      underneath shelf-ice with draughts of hundreds of meters.
1330     - works
1331     - to do: + include improved thermodynamics
1332              + check whether kSurfC (from model/inc/SURFACE.h) can be used
1333                instead of new field kTopC
1334              + can we use topoFile, Ro_surf and existing code in ini_depth.F
1335                instead of new field R_shelfIce and new code in ini_depth.F
1336                and ini_mask_etc.F?
1337              + adjust vertical mixing schemes?
1338    o seaice pkg:
1339     - add a cpp-flag to include a simple formula for a salinity dependent
1340       freezing point of sea water at the surface
1341     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
1342       meridional stresses are now different (and hopefully correct)
1343    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
1344       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
1345       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
1346    o pkg/diagnostics: add options and parameters for regional-statistics
1347       diagnostics ; define regions by reading a region-mask from a file
1348       (might add other options later)
1349    o pkg/bulk_force:
1350     - add option and parameters to use AIM surface-flux formulae.
1351     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
1352       others forcing fields (defined in PARM05, parameter file "data") are loaded
1353       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
1354     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
1355     - use the right EXCH call for uwind,vwind (to work on CS-grid).
1356     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
1357       and parameters (note: calcWindStress replaces .NOT.readwindstress).
1358     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
1359    
1360    checkpoint58
1361    o add "--embed-source" option to genmake2 which, when the supporting
1362      tools can be compiled (as determined by genmake2) will turn on the
1363      embed_files package which then embeds the entire MITgcm source code
1364      (*.[fFhc] + Makefile) used for the build within the executable
1365      - requested by CNH but off by default
1366      - adds a paltry <9MB to the mitgcmuv executable in most cases
1367      - only writes the output when useEMBEDSRC in eedata is true
1368    o clean up 3-dim. relaxation codes:
1369      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
1370      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
1371      * Thanks to Tom Haine for testing!
1372    
1373    checkpoint57z_post
1374    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
1375      affects output (@ truncation level) of exp. plume_on_slope ; updated.
1376    o fix the pickup behavior for obcs in combination with ptracers
1377    o fix a bug in ptracers_external_fields_load
1378    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
1379      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
1380    o transfered surface NH pressure to eta field (if exactConserv).
1381    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
1382         and update lab_sea output.txt file.
1383    o completing 3-dim. relaxation code: additional term
1384         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
1385      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
1386      * At compile time, in "EXF_OPTIONS.h" set
1387          #define  ALLOW_CLIMTEMP_RELAXATION
1388          #define  ALLOW_CLIMSALT_RELAXATION
1389      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
1390          tauThetaClimRelax3Dim = 15552000.0,
1391          tauSaltClimRelax3Dim  = 15552000.0,
1392      * 3 cases:
1393          1) Use a constant-in-time 3-dim. field
1394          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
1395          3) Real-time relax. to time-evolving prescribed field
1396    o Adding Laplacian-type smoothness constraint on
1397      initial and boundary (forcing) controls (ic, bc)
1398      * enable at compile-time via
1399        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
1400      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
1401      * Absolute scale somewhat unclear so far
1402      * no area weighting was included since no other cost term does so far
1403    
1404    checkpoint57y_post
1405    First step for a NLFS adjoint
1406    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
1407    o new init. routines for calc_r_star, calc_surf_dr
1408    o still need to deal with ini_masks_etc
1409    o testreport seemed happy
1410    checkpoint57y_pre
1411    
1412    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
1413    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
1414    o add new offset feature to offline pkg (plus minor cleanup)
1415    o cfc fixes for final year of integration
1416    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
1417      be in GCHEM_OPTIONS).
1418    
1419    checkpoint57x_post
1420    o fix testreport Pb in multiple test experiment.
1421    o cleanup our namelist syntax in verification:
1422      - make it more F95 standards compliant (some work still needed)
1423      - allows the vast majority of our tests to work with gfortran
1424    o Non-Hydrostatic:
1425     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
1426     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
1427    o Allow to apply AB on T,S rather than on AB(gT,gS):
1428     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
1429     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
1430       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
1431     - need a "clever" read_pickup to restart from the other AB formulation
1432    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
1433    o remove some unused variables (reduces number of compiler warnings)
1434    o adjoint
1435      * Disable useVariableViscosity for adjoint for time being
1436        (there are a number of extensive recomputations)
1437      * Initialize certain variables needed for adjoint
1438    
1439    checkpoint57w_post
1440    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
1441                 fix the singleCpuIO RS version of MDSWRITEFIELD
1442       and add a WARNING if using globalFiles=T with multi-processors.
1443    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
1444      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
1445    o tracer advection scheme:
1446      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
1447       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
1448       was not very convenient).
1449      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
1450       (further tests needed for the implicit DST & Flux-Limiter schemes).
1451    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
1452      and sRef for convenience, handy, when you want to initialize
1453      ptracers in a large domain with a constant non-zero value. Also,
1454      untangle ptracers_init.F a little.
1455    
1456    checkpoint57v_post
1457    o change dome exp. to use variable viscosity in side-drag terms.
1458    o remove all the files from the cfc_offline test since they are now
1459      incorporated into tutorial_cfc_offline which has been producing
1460      identical results for a few days of testing
1461    o add new parameter: sideDragFactor to enable half-slip-side BC
1462      and change side-drag S/R to use viscosity from mom_calc_visc
1463      (can switch back by setting sideDragFactor=0.); affects results at
1464      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
1465       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
1466    o vorticity & strain are now computed without masking, to account for
1467      no-slip-side BC in variable viscosity calculation ; mask is applied
1468      anyway later on, before computing advection/coriolis terms.
1469    o modify exp4 to test new obcs support for reading from external files
1470      and for passive tracers
1471    o fix behavior of ptracers_monitor when monitor output is written to a
1472      netcdf-file; still not independent of monitor.F (writes in the same
1473      file).
1474    o change default value of tRef (put a uniform, meaningful value for ocean
1475      & atmos) and initialize sRef (was missing, as Martin mentioned).
1476    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
1477      to be proportional to enstrophy dissipation length.  Thus,
1478       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
1479      This is now consistent with Smagorinsky and with the manual.
1480    
1481    checkpoint57u_post
1482    o OBCS and PTRACERS: add open boundary support for passive tracers
1483      - either use homogenous (pseudo) v.Neumann conditions or prescribe
1484        OB-values from file; this is not different from the way theta and salinity
1485        are treated
1486      - however, Orlanski-radiation conditions are not supported, and the model
1487        will stop if you use pTracers and Orlanski at the same time.
1488      - beefed up the rountine obcs_external_fields_load: now only those open
1489        boundary values are overwritten with values from files for which there
1490        are really files, otherwise the OB-fields remain untouched. This makes
1491        it possible to use different OBs at different ends of the domain (as
1492        with EXF)
1493    o reduce number of exch calls in shap_filt (s2).
1494    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
1495      truncation level) 4/5 MLAdjust test results (11&12 digits match).
1496    
1497    checkpoint57t_post
1498    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
1499    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
1500      same truncation, independent of the face number: affects affects several
1501      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
1502    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
1503      note that biharmonic viscosity + no-slip was not tested in any experiment.
1504    o fix bug in non-linear free-surf side-drag ; generate new output for
1505      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
1506    o make mnc honor the writeBinaryPrec flag for most kinds of output
1507    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
1508    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
1509      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
1510    o add brackets in multi-terms sum to get same truncation, independent of
1511      the face number (manage to get exactly same value of gU,gV at the cs-edge)
1512      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
1513    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
1514      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
1515      a maximum grid-scale Reynolds number.  Also, changes all length calculations
1516      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
1517      Suggested values of viscosity parameters found in mom_calc_visc.
1518      Many new viscosity diagnostics available.
1519    
1520    checkpoint57s_post
1521    o Add clearing-house for viscosity calculations, mom_calc_visc and
1522      correct numerous bugs in LeithD and Smagorinsky discretizations.  
1523      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
1524      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
1525      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
1526      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
1527      The Strain-Tension form is now called with useStrainTensonVisc=.true.
1528      ViscAhStrain and viscAhTension are now retired.
1529    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
1530    o In response to JMC's bug report, genmake2 now ignores any soft-links
1531      that it finds in the *current* directory when searching for files.
1532      Soft-links found in any other source directories will still work as
1533      they did before.
1534    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
1535      a C routine to unlimit the stack size
1536    o mnc-ify pkg/aim snapshot vars
1537    o mnc-ify pkg/land as requested by Daniel
1538    o various changes to mnc including:
1539      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
1540      - output can now be grouped so that all files within a group
1541          change the ITER portion of their names in lock-step together
1542      - can now read ("global") PER-FACE (in addition to PER-TILE) files
1543          and works with both EXCH1 and EXCH2 (but needs more testing)
1544      - writing works for all verification test cases w/ g77 on Linux
1545    
1546    checkpoint57r_post
1547    o make MNC variable initialization happen earlier
1548    o add diagnostics for (almost) each term of the momentum Eq.
1549    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
1550    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
1551    o remove MINIMAL_TAVE_OUTPUT option ;
1552      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
1553    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
1554      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
1555    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
1556    o add time-dependent SST, SSS control
1557    o cost terms in ecco/ modularized (new cost_generic.F)
1558    o cost_averages routines are modularized (new cost_averagesgeneric.F)
1559    o new infrastructure for seaice model vs. obs misfits in seaice/
1560      * driver from the_main_loop.F is seaice_cost_driver.F
1561      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
1562      * gradient check in Exp. 6a of natl_box_adjoint/
1563    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
1564      (see README file)
1565    
1566    checkpoint57q_post
1567    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1568    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1569      - bug was reported by Jean-Michel and Ian Fenty
1570    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1571      update exp. cpl_aim+ocn output.
1572    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1573      Needed for high-res. runs with large global files
1574      to be able to limit tapelev size
1575    o Changed some tests for adjoint:
1576      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1577      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1578      * global_ocean.90x40x15/ back to default 3-level checkpointing
1579    o Modifications to enable scripted COMMON to MODULE conversion
1580      * verification/OpenAD/code/ has necessary scripts and description;
1581      * converts, compiles and runs successfully;
1582    
1583    checkpoint57p_post
1584    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1585    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1586      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1587    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1588    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1589      (was already the case for dissipation with mom_vecinv,
1590       and also the case for grad.PhiHyd when staggered-timeStep)
1591      This will allow to put dissipation out-off the AB time-stepping.
1592     Unfortunately, affects truncation error. Update output of exp. that "fails"
1593      (cg2d matching number) and leave the others for later: front_relax(10),
1594      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1595      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1596    
1597    checkpoint57o_post
1598    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1599      (2) its ready to be documented during the 20050801 DocFest
1600    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1601      for ideal_2D_oce and lab_sea on linux_ia32_g77
1602    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1603      in global1x1_tot/code_seaice_adj to access indices 32, 33
1604      (worth another tag)
1605    
1606    checkpoint57n_post
1607    o adding precip control xx_precip 32
1608    o adding swflux control xx_swflux 33
1609    o Replacing 10 forcing penalty cost routines by 1 generic.
1610    o Implementing partitioning in time-mean and variable adjustment
1611      for atmos. state.
1612    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1613  o in natl_box_adjoint:  o in natl_box_adjoint:
1614    * updated: results_bulk/    * updated exp 1 to 10
1615    * not yet updated: results/, results_seaice/      (but does not have time-mean vs. variable split results yet)
1616    o updated global1x1/*_seaice_adj/
1617      to incorporate latest changes
1618    o enable useSingleCpuIO for mdsio vector routines
1619      (applies in particular to tapelev I/O)
1620    o removed inefficient K-loop in all active_file*control*.F
1621    
1622  checkpoint57m_post  checkpoint57m_post
1623  o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)  o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)

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