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revision 1.628 by jmc, Mon Mar 13 04:44:25 2006 UTC revision 1.1011 by jmc, Tue Jul 29 21:17:45 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 exch2:
8     - change index-bounds storage (moved from target to local tile,
9       more intuitive this way) ; rename/remove some variables.
10     - change utils/exch2/matlab-topology-generator accordingly.
11    
12    checkpoint61a
13    o exch2/matlab-topology-generator:
14      fix bug in index bounds for N-S internal exchange (hard to tell if this
15      had any effect on the solution).
16    o pkg/mnc: small fix in mnc_handle_err: make sure that length of msgbuf
17      is exceeded
18    o testreport: modify syntax of awk, so that it works also with
19      awk, and not only with nawk and gawk
20    
21    checkpoint61
22    o autodiff
23      Change default for TAF usage by removing argument '-nonew_arg'
24      This changes TAF subroutine argument list (ordering of active var.)
25      Omission of this flag leads to incompatibility w.r.t. TAMC
26      To restore TAMC-compatibility, need following modifs:
27      * use adoptfile tools/adjoint_options/adjoint_tamc_compatibility
28      * use CPP option #define AUTODIFF_TAMC_COMPATIBILITY
29      Tested TAF version is 1.9.22
30      N.B.: exch2 hand-written adjoint code currently not TAMC compatible
31    
32    checkpoint60
33    --->>> This is the last checkpoint for which generating the adjoint
34    --->>> is done via the TAMC-compatibility TAF-flag "-nonewarg"
35    --->>> by default.
36    --->>> Future checkpoints will ommit this flag by default.
37    o pkg/generic_advdiff, os7mp: simplify and avoid division by zero.
38    o pkg/grdchk: Add gradient check to etan0 perturbations.
39    o pkg/exf: read ice area from file (#ifdef ALLOW_ICE_AREAMASK).
40    o pkg/autodiff: more flexibility in zeroadj.
41      model/src: modifying do_oceanic_phys.F accordingly.
42    o pkg/ctrl: Bounds for (kapgm,kapredi,eddypsi) parameter estimation.
43    o model/src and pkg/gmredi: GMREDI_WITH_STABLE_ADJOINT CPP option
44      special setup of gmredi for which the adjoint is stable
45      enough for parameter optimization.
46    o bridging the gap between eddy stress and GM.
47      -> eddyTau is replaced with eddyPsi (eddyTau = f x rho0 x eddyPsi)
48          along with a change in CPP option (now ALLOW_EDDYPSI).
49      -> when using GM w/ GM_AdvForm:
50          The total eddy streamfunction (Psi = eddyPsi + K x Slope)
51          is applied either in the tracer Eq. or in momentum Eq.
52          depending on data.gmredi (intro. GM_InMomAsStress).
53      -> ALLOW_EDDYPSI_CONTROL for estimation purpose.
54      The key modifications are in model/src/taueddy_external_forcing.F
55      pkg/gmredi/gmredi_calc_*F pkg/gmredi/gmredi_*transport.F
56    
57    checkpoint59r
58    o new S/R (pkg/mdsio/mdsio_facef_read.F) reading of sNx+1 x sNy+1 array
59      from per-face file (take S/R READSYMTILE_RS out of ini_curvilinear_grid.F);
60      fix option to read coriolis(@ cell-corner) from files with CS-grid.
61    o pkg/mnc: add some attributes to standard 1D-coordinate variables
62    o pkg/diagnostics: enforce missing_value attribute for scalar variables at
63      mass points, when using mnc for output
64      - add runtime parameter (missing_value, missing_value_int) to override
65        default (which is the value of getcon('UNDEF'))
66    o pkg/mnc: prepare mnc for the actual use of missing values with the
67      diagnostics package: small fix in mnc_cw_readwrite.template and more
68      initialisation of never used fields
69      - replace mnc_common.h and mnc_id_header.h with corresponding upper case
70      versions
71    o pkg/thsice/thsice_ini_vars.F added default initial values so that
72      thermodynamics sea ice solver does not blow up when some initial fields
73      are missing.
74    o move from external_forcing_surf.F to ini_forcing.F
75      the p-coord. hack consisting in using pLoad to set phi0surf ;
76      update output of tutorial_global_oce_in_p (affected @ truncation level).
77    o Freshen up a bit hs94.1x64x5, notably:
78      remove rotationPeriod and tRef=5*0. (adjoint only), and add
79      exactConserv=.TRUE.
80    o pkg/generic_advdiff:
81      change option GAD_ALLOW_SOM_ADVECT to GAD_ALLOW_TS_SOM_ADV which only
82      applies to files where Temperature & Salinity 2nd Order moments are used.
83    o pkg/ptracers: add second-order moment advection schemes (80 and 81);
84      this uses a dynamically allocated internal state data structure
85      (#define PTRACERS_ALLOW_DYN_STATE in PTRACERS_OPTIONS.h)
86      and requires a fortran 90 compiler
87    
88    checkpoint59q
89    o pkg/mom_vecinv: Add energy & enstrophy conserving scheme (selectVortScheme=3)
90       (from Sadourny, described by Burridge & Haseler, ECMWF Rep.4, 1977)
91    o Refresh tutorial_global_oce_biogeo, notably:
92      - change bathymetry (put back seamounts in ACC, use hFacs)
93      - change EOS (POLY3 --> JMD95Z)
94      - use Bryan-Lewis vertical diffusivity
95      - use multidimensional advection
96      - remove old virtual virtual in dic pkg, now done through ptracer pkg
97      - change a couple of parameters in dic pkg
98    o pkg/ctrl: change formula in adctrl_bound.F and add a parameter to ctrl_map_ini_gen.F
99    o pkg/obcs: change default to OBCSfixTopo = .true.,
100      - set OBCSfixTopo=.false. in exp4/input/data.obcs to reproduce old result
101      - replace "debugMode" with "debugLevel .GE. debLevB"
102    o implementation of TAF directives for gchem,cfc,dic
103    o remove "exp5" (replaced by tutorial_deep_convection).
104    o pkg/obcs: add code to fix topography gradients normal to open boundaries;
105      this requires computing the index fields OB_Jn/Js/Ie/Iw in obcs_readparms;
106      the code can be turned on by setting OBCSfixTopo = .true. in data.obcs
107      --> changes results in exp4, seaice_obcs
108    o tutorial_deep_convection :
109      update the set-up and increase resolution and domain size ; start
110      from pseudo initial conditions = output at t=120mn in order to see
111      something happening when running testreport.
112    o pkg/seaice: add os7mp as an advection scheme
113                  add check for advection schemes
114                  add a flag for restoring T and S underneath sea ice
115    o pkg/my82: add netcdf-support and diagnostics
116    o thsice pkg:
117      - Now hsMax limits snow height by turning it into ice following
118        flooding scheme (and now conserving energy)
119      - Slight rewriting of the formula in thsice_calc_thick.F
120      - Parameter rhowi eliminated to be replaced by floodFac = (rhosw-rhoi)/rhos
121      --> changes results of global_ocean.cs32x15.icedyn and global_ocean.cs32x15.thsice
122    
123    checkpoint59p
124    o gchem / dic / cfc :
125      - add useDIC, useCFC , read from "data.gchem" (& hold in GCHEM.h);
126      - add new parameter files: "data.dic" & "data.cfc" ;
127      - various re-arrangement in initialisation & header file ;
128      - fix tutorial_global_oce_biogeo for multi-threaded test.
129    o pkg/dic: test for "pickup_dic" file when restarting ;
130      if no pickup-file, can restart with a re-initialised pH (same as it did
131      before) providing pickupStrictlyMatch is set to False.
132    o change argument list of S/R PTRACERS_WRITE_PICKUP & MYPACKAGE_WRITE_PICKUP
133      + fix call to S/R GGL90_WRITE_PICKUP & DIC_WRITE_PICKUP
134    o add a "warning" (to Error msg file) when an Active Tracer is not using AB-2
135      and staggerTimeStep is off (needed for stability of Internal-wave dynamics).
136    o move out of PARAMS.h & data the last pieces of old-ptracer code: tauTr1ClimRelax,
137     & lambdaTr1ClimRelax ; put those 2 params in PTRACERS_PARAMS.h & data.ptracers
138       (note: not clear to me what lambdaTr1ClimRelax is still used for ...)
139    o pkg/mom_vecinv: - new parameter "selectVortScheme" to select which
140       scheme to use for vorticty-term ;
141     - compute upwindVorticity=T case within mom_vi_u/v_coriolis_c4.F
142       (with default selectVortScheme, return to original discretisation)
143     - remove weird combination (e.g.: upwindVorticity & highOrderVorticity)
144    o pkg/seaice: add a line to the summary to indicate grid type (B/C)
145    o in mom_calc_visc, fix average value of viscAh_W & viscA4_W next to the
146      bottom ; only used with variable horizontal viscosity and non-hydrostatic.
147      also fix diagnostics VISCAHW & VISCA4W.
148    
149    checkpoint59o
150    o dome/code/obcs_calc.F: avoid division by zero (detected using gfortran).
151    o change the loop ordering in most gad_*_adv_x.F to improve vectorization:
152      move a few statemens out the main loop into separate loops
153    o pkg/shelfice:
154      - sort out freshwater flux; convert freshwater fluxes to mass fluxes
155        (kg/m^2/s), does not break tests, because in verification/isomip,
156        rhoConstFresh=rhoConst (by accident)
157      - rearrange computation of tLoc, sLoc, pLoc to make code more efficient
158      - move S/R find_rho_scalar, pkg/ecco/sw_ptmp.F, pkg/ecco/sw_adtg.F into
159        new file model/src/seawater.F, so that they are available for all pkgs.
160      - convert potential temperature into in-situ temperature. This changes the
161        isomip tests => update tests
162    o add a flag writePickupAtEnd (default=true) to be able to suppress
163      writing a pickup at the last timestep
164    o tools/mpack-1.6 :
165      - disable automake (not working) and autoconf (not needed).
166      - update to version 1.6.4 which fix MD5 code on some 64 bits platforms
167        also cleaner with much less compilation warnings.
168    o pkg/profiles:
169      rename profiles_interp_mean_genericgrid as profiles_interp_mean_gg
170      (for "less than 32 characters name" compiler requirement)
171    o pkg/obcs and pkg/exf: added capability to specify seaice open boundary
172      conditions that have a different sampling frequency than S/T/U/V obcs
173    o pkg/diagnostics (stats-diags):
174      - fix global Min/Max in case 1 processor get only empty tiles
175    o genmake2: replace (4 times)
176         make genmake_tc_1.o >> genmake_warnings 2>&1
177      with
178         COMM="$CC $CFLAGS -c genmake_tc_1.c"
179         echo $COMM >> genmake_warnings
180         $COMM >> genmake_warnings 2>&1
181      to make genmake2 always see the value of CC as specified in the optfile.
182    o generic_advdiff: - prather advection scheme (SOM) coded for CS-grid.
183      - add diagnostics for 1srt & 2nd Order moments and sub-grid variance.
184      - modify verification advect_cs test to test SOM-advection on CS-grid.
185    o pkg/ctrl:
186      - Rewrite of ctrl_map_ini_ecco.F,
187        introducing a generic routine (ctrl_map_ini_gen.F).
188      - Modification of ctrl_bound/adctrl_bound handling control vector bounds.
189    
190    checkpoint59n
191    o pkg/diagnostics: for large number of diagnostics, store diagnostic mate
192      number in dedicate array "hdiag":
193      - new version of S/R DIAGNOSTICS_ADD2LIST : DIAGNOSTICS_ADDTOLIST
194        with 1 more argument (mate number); modify old version DIAGNOSTICS_ADD2LIST.
195      - many small changes (integer format) for large number of diagnostics
196      - start to use DIAGNOSTICS_ADDTOLIST (necessary for diagnostics with
197        a counter mate) in pkg diagnostics, ptracers, thsice & aim_v23.
198    o add parameter rotateGrid and Euler angles EulerPhi/Theta/Psi. For
199      usingSphericalGrid, this allows to define the rotated grid coordinates
200      via phiMin/thetaMin/dxSpacing/dySpacing, etc., but then re-compute the
201      geographical coordinates according to the inverse of the rotation defined
202      by the Euler angles, so that Coriolis parameter and online-interpolation by
203      exf works with the geographical coordinates on XC/YC/XG/YG.
204      Naturally, this feature does not work with all packages, so some
205      combinations are prohibited in config_summary (flt, flt_zonal, ecco,
206      profiles), because there the coordinates are assumed to be regular
207      spherical grid coordinates.
208    o pkg/gmredi,ctrl,ecco,autodiff,grdchk and model/src,inc:
209      - introduce isopycnal diffusion coefficient control.
210    o tools/adjoint_options:
211      - additional control vector components.
212    o pkg/mnc: have mnc create marginally meaning full coordinate variables
213      (that is the grid indices) if usingCurvilinearGrid and NOT EXCH2
214    o pkg/mypackage:
215      - add example of read/write pickup for state-var ;
216      - add entry points to the main code for state-vars diags & write-pickup.
217    o pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
218      transitions for useExfYearlyFields
219      - add new subroutine that determines the file to read from for
220        use*YearlyFields = .TRUE. and .FALSE.
221      - add a verification experiment to global_with_exf that tests
222        useExfYearlyFields with USE_EXF_INTERPOLATION defined
223    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
224      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
225      subroutines (which could be generated from a template, because they are
226      almost identical), for now they are included in obcs_prescribe_read.F for
227      simplicity
228    o pkg/exf:
229      - add a little more diagnostic to exf_interp_read (in analogy to
230        mds_read_field, can be turned off with debugLevel < debugLevA=1)
231      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
232        ugly but fast by unrolling short inner loops, inserting a unroll=8
233        directive in routine lagran, and splitting a loop and making do while the
234        outermost loop (the latter requires the intoduction of index arrays)
235    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
236    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
237      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
238    o verification/seaice_obcs: updated for restart test and latest options
239    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
240      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
241      for now this is only available for the C-grid code and also within
242      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
243    
244    checkpoint59m
245    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
246      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
247    o gad_som : fix flux output (& diagnostics) to have same units as other  
248      advection scheme fluxes (was previously multiplied by deltaT).  
249    o added verification/seaice_obcs both to test seaice open boundaries
250      and to provide an example matlab scrpt for generating them
251    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
252    o pkg/salt_plume: clean up salt_plume_frac.F to
253      remove redundancy in PlumeMethod 1 and 4
254    o pkg/kpp: added saltplume diagnostics
255    o pkg/obcs and pkg/seaice:
256      - do not set uice and vice to zero when OB*icefile are unspecified
257      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
258      - moved seaice tracer obcs after call to seaice_growth
259    o pkg/salt_plume: added various options for salt plume depth
260      criterion and for vertical distribution of the salt
261    
262    checkpoint59l
263    o pkg/ptracers: new version of ptracers pickup:
264      read meta file and write only fields which are needed to restart.
265      ( same logic as main pickup file ; also using pickupStrictlyMatch )
266    o pkg/seaice:
267      - add timescale for melting due to warm mixed layer as a means of
268        setting SEAICE_availHeatFrac more conveniently
269      - add a CPP-flag/runtime parameter check for flooding algorithm
270      - reformulated availHeat in seaice_growth.F to be independent of AREA
271    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
272      unit changes
273    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
274    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
275      SX vector computer.
276    o pkg/seaice:
277      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
278        seaice forcing fields can now be read only through pkg/exf
279      - removed some unused halos
280    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
281    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
282      or U/VICE from U/VWIND before computing U/VSTRESS
283    
284    checkpoint59k
285    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
286      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
287    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
288      all experiments pass when compile with un-initialised var. checking option.
289    o added pkg/salt_plume
290    o script to test restart (for now, in MITgcm_contrib/jmc_script)
291    o pkg/seaice: new read/write pickup version.
292      read meta file and write only fields which are needed to restart.
293      ( same logic as main pickup file ; also using pickupStrictlyMatch )
294    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
295    o lab_sea.hb87: modify the domain & update output.hb87.txt :
296      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
297      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
298      process. Fixed here by closing the domain at the Northern boundary.
299    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
300    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
301      a set of consecutive levels in/from a 3-D array.
302    o pkg/ptracers:
303      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
304      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
305    
306    checkpoint59j
307    o in pkgs: dic, obcs, offline, rbcs:
308      standard way to compute coeff. for time interpolation between 2 time reccords
309      which retains full precision (& make results less dependent on compiler).
310      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
311    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
312      packages instead of reading ice cover and wind speed separately
313    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
314     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
315      to allow to compile customized code before the update)
316    o cleaning-up:
317      - fix CPP instruction syntax in pkg/obcs
318      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
319        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
320      - fix some threads issue in IO parts.
321    o pkg/dic:
322      - add tons of "_d 0" (--> much better testreports !)
323       and then update outputs of tutorial_global_oce_biogeo
324    o pkg/mom_fluxform:
325      add a special version of momentum advection intended to conserve momentum
326      next to a bathymetry step or a coastline edge. (default = off = #undef)
327    o new read/write pickup version:
328      - for now, only implemented for main (mdsio) pickup file.
329      - write out only what is needed to restart; merge pickup_nh , pickup_ph
330        and main pickup together.
331      - read meta file; read only what is needed to restart; stop if a field
332        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
333        if it make sense (even if the restart is not perfect).
334      - if no meta file, assume that pickup to read corresponds exactly to
335        a pickup that would currently be written.
336      - read pickup written in the old format (until checkpoint59i) if it
337        recognizes an old meta file (no field-list).
338      - add a meta file in exp. which starts from a pickup: 2 cases:
339        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
340         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
341        b) a meta file describing the content of the associated pickup file
342         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
343    o pkg/mdsio & pkg/rw:
344      - new routine to read a meta file ; new set of routine to read
345        Multiple-fields file (with meta file).
346    o added open boundary conditions capability for seaice
347        HSNOW, HSALT, UICE, and VICE
348    
349    checkpoint59i
350    o adjoint:
351      * fix multiDimAdvection adjoint
352        (partial recomputation problem by TAF for fVerT(:,:,kDown)
353        and comlev1 size definition (maxpass vs. max. number of tracers)
354      * verification/global_ocean.90x45x15 adjoint now tests
355        NLFS and multiDimAdvection using DST3 (=30)
356      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
357    o pkg/kpp: add "_d 0" to real constant (if missing);
358      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
359      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
360    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
361      for internal parameters related to restart process (formerly from PARAMS.h)
362      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
363    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
364      as argument. (only atm2d & obcs write_pickup have not yet been updated)
365    o pkg/monitor:
366      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
367      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
368      - account for deep Atmosphere factor and density factor (anelastic)
369    o added open boundary conditions capability for seaice HEFF and AREA
370    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
371      thermodynamics
372      - requires a little reorganization, which affects the testreport results
373        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
374        so that now the conservative form is tested
375      - add a few comments
376    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
377    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
378    o add new diagnostics to seaice: advective, diffusive fluxes (only for
379      multidim-advection, for scheme 2 they are not filled) and transports,
380      thermodynamic growth rates
381    o change units of EmPmR (inside the code, + within coupling interface)
382      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
383      Affects results @ truncation level (cg2d match) and update output of
384       experiments: lab_sea(6), global_ocean.90x40x15(10),
385      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
386      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
387      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
388      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
389    
390    checkpoint59h
391    o pkg/exf:
392      - improve vectorization by moving if-statement out of loops in
393        exf_mapfields, exf_radiation
394      - exf_bulkformulae.F: introduce 2D fields and vectorize code
395    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
396    o testreport:
397      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
398        monitor & update offline_exf_seaice exp. output.
399      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
400    o pkg/seaice:
401      - bug fix in the evp solver: boundary conditions were affected be
402        masking of zMax/zMin (changes results)
403      - minor bug fix in boundary conditions in seaice_calc_strainrates
404        (changes results for no_slip)
405      - seaice_lsr.F: make interpolation of eta dependent on boundaries
406      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
407      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
408        stress formulation and no-slip boundary conditions
409    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
410      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
411    o pkg/seaice: a first HSALT time stepping equation has been checked in
412    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
413      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
414      without requiring DO-IF statements
415    o pkg/thsice:
416      use continuous power-law function for partition of energy between lateral
417      melting/freezing and thinning/thickening ; old code using step function
418      still available with #undef THSICE_FRACEN_POWERLAW
419      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
420    o testreport: change AD testing : check against results/output_adm.txt
421      using same scripts as for forward test.
422    
423    checkpoint59g
424    o adjoint testing: in preparation for changing testreport:
425      - output format: cost and grad written on separated lines
426      - ad output results in directory "results" (instead of "results_ad")
427    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
428    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
429    o pkg/ecco: allow user defined cost function contributions
430    o testreport:
431      Allow to choose (per experiment) the list of tested output variables
432       and the main variable (used to issue a pass/FAIL ) ;
433      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
434      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
435      Also modify printing of summary:
436       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
437       b) echo the list of tested variables in the individual summary.txt of
438          each experiment.
439    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
440      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
441      (but still depend on the tile decompostion of the domain).
442    o pkg/seaice: change a discretization detail to make the B-grid code
443      "more symmetric". This change is likely to remove all "ridges/leads" that
444      where quasi-aligned with the grid in B-grid solutions. It may also be
445      the solution to the stress coupling issues with the B-grid.
446    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
447      remove .cvsignore from input dir. (since testreport no longer run here).
448    o pkg/thsice:
449     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
450     - fix reshaping of sea-ice just after advection:
451       melt all the ice only if ice-volume is too small.
452     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
453       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
454     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
455    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
456      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
457    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
458      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
459      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
460      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
461      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
462      -> update output.txt
463    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
464     this affects truncation error: -> update output.txt of exp:
465      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
466      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
467    
468    checkpoint59f
469    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
470    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
471      a bounded range (in forward mode)
472    o pkg/ecco, ctrl, autodiff and mom_common:
473     internal parameter controls, completements of implementations
474    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
475    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
476      (not seem any difference in testing results).
477    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
478       at face corners.
479    o pkg/generic_advdiff:
480     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
481      loop range indices for computing vertical advection tendency
482      and do the calculation in the interior only (no overlap) ;
483      for now, only implemented for SOM advection (to save CPU time).
484     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
485    o exch2 adjoint
486      First set of changes:
487      - add exch2 hand-written adjoint templates
488      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
489        This will require cleanup in pkg/autodiff/*.F
490        (changed routines currently kept separate in verif. code/)
491      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
492        that used to hide exch2 or cubed-sphere specific code
493        (commented via 'cph-exch2')
494    o pkg/seaice
495      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
496    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
497       output of global_ocean.cs32x15.thsice .
498    
499    checkpoint59e
500    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
501      for B-grid vector (not yet tested) and C-grid vector (<- only used
502      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
503    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
504      (#ifdef ALLOW_SALT_PLUME)
505    o gather_2d/scatter_2d: removed halo regions
506    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
507      scheme and the corresponding test case (under front_relax dir). For now,
508      only available with Skew-flux form and not yet tested in realistic set-up.
509      adjoint: store directives updated, but gradient checks deteriorated,
510      so maybe GM/Redi adjoint is now broken.
511    o seaice adjoint
512      * add AREA, HEFF, HSNOW as control variable
513        (should not change lab_sea results)
514      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
515    o pkg/seaice:
516      * added computation of saltFlux in seaice_growth;
517        For time being, sea ice salinity is assumed constant
518        contribution of snow flooding to freshening of sea ice is neglected.
519        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
520        defaults to 0.0 in order to maintain backward compatibility.
521        Typical values for SEAICE_salinity are 4 to 10 g/kg.
522      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
523      * added SEAICE_availHeatFrac, which specifies fraction of surface level
524        heat content used to melt or grow ice
525      * commented out cap of HICE: it helps keep ice thinner
526      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
527      * applied OBCS T/S mask to HEFFM sea ice mask
528    
529    checkpoint59d
530    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
531     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
532     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
533    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
534     and change default value of parameter "GM_Small_Number";
535     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
536       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
537       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
538    o pkg/ecco: cost function when applying pkg/smooth to controls
539    o pkg/ctrl: add forcingPrecond run time parameter
540    o pkg/seaice:
541     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
542     - fix bug in metric terms of u-equation in LSR solver (implicit part),
543       changes verification/lab_sea
544     - rearrange implicit part of u-equation in LSR solver to make it easier to
545       read, understand, and debug. This causes changes at the truncation level.
546     - fix (serious) bug in the boundary conditions (sign error in the implicit
547       part) of the LSR solver. Changes all LSR results.
548     - fixed problem with HSNOW initialization to avoid thick snow when AREA
549       is initilized with small values - does not change lab_sea results.
550     - added HsnowFile initialization capability
551    o pkg/smooth: addition to model/src and pkg/ctrl so allow
552     initialization of pkg/smooth and application to control vector
553    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
554    o dependencies: pkg/profiles requires pkg/cal
555    o pkg/profiles:
556     - added option ALLOW_PROFILES_GENERICGRID
557         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
558         that interpolation information (grid points and coefficients) is provided
559         within the netcdf input files.
560         -> sample matlab scripts can be found in MITgcm_contrib/gael
561         that allow you to prepare netcdf input files.
562     - also modified: cleaner include statements, cleaner error print statements,
563       cleaner stops when error, and more tests of the netcdf input files consistency.
564    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
565    o pkg/seaice:
566     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
567       requires a new routine: seaice_diagnostics_fill.F
568     - make sure that seaice does not move if not forced (pressure replacement
569       method, Hibler and Ip, 1995), changes results
570     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
571     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
572       It is turned off by default (=-1.), because it changes the results.
573     - make it possible to read AREA from a file, too.
574    
575    checkpoint59c
576    o add S/R and diagnostics for oceanic mixed-layer depth
577    o move GMRedi call after all vertical mixing schemes (including KPP)
578    o pkg/thsice:
579     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
580      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
581    o pkg/obcs:
582     - bug fix for balance code
583    o pkg/seaice:
584      - allow values of SEAICE_elasticParm > 1
585      - add new parameter SEAICE_evpTauRelax as an alternative
586        to SEAICE_elasticParm
587      - make lsr boundary conditions free slip (by default), changes result
588      - add code for no slip boundary conditions for lsr
589      - set minimum of zeta to zero (and not 4e8) (changes results)
590      - add a cap on AREA after advecting AREA if seaice_growth is not called
591    o change calculation of Visbeck K:
592      - no longer depend on tapering scheme; instead, compute slope (limited
593        by GM_maxSlope). this is equivalent to what was comuted before with
594        clipping or linear tappering.
595      - fix vertical averaging (wrong by 1/2 level)
596      - leave the old version (but will not be maintained) within
597        #ifdef OLD_VISBECK_CALC / #endif
598      - update output of exp. ideal_2D_oce
599    o change error catch in calc_r_star to improve vectorization
600    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
601      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
602    o adjoint:
603      Re-organized adjoint checkpointing according to Matt Mazloff
604      (but with modifs/completions/cleanups)
605      Storing is now bundled into large arrays to optimized I/O
606      (and second step in cleanup of the_main_loop)
607    
608    checkpoint59b
609    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
610      - export/import (between ocean & coupler) fields needed for ocean DIC.
611    o pkg/seaice:
612      - get rid of three more exchanges seaice_calc_viscosities (required
613        different loop boundaries in seaice_lsr and seaice_ocean_stress)
614      - bug fix in seaice_ocean_stress (update of lab_sea required)
615      - reduce loop boundaries to necessary minimum also in seaice_evp
616      - go back to the old way of computing deltaC/Z as the adjoint likes that
617        better
618    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
619      passive tracer to an Age Tracer) + update output.txt
620    o pkg/exf:
621      - implement A-grid / C-grid selection for wind-stress input files.
622      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
623      for now, in exf_bulk_largeyeager04.F only :
624      - change implementation for case where windspeed + 2. components wind-stress
625        are read-in. AND use rhoConstFresh to convert evap.
626    o pkg/seaice:
627      - use correct EXCH_UV for wind-forcing (on A-grid).
628      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
629        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
630    o pkg/exf:
631      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
632      EXF_INTERPOLATION:
633      - merge global_with_exf/code version of exf_interp_read.F
634        to the main code ;
635      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
636        reading the file ; Important: This options needs to be defined to recover
637        previous code.
638        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
639      - no longer loose real*8 precision along the way when using exf_iprec=64.
640    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
641      - change discretisation of evp-solver in order to avoid another exchange
642        (changes lab_sea) and clean up a little
643      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
644        help the adjoint (this also changes the results slightly)
645      - add a few "_d 0" where they had been missing in seaice_evp.F
646      - cleaning up: remove unused seaice_calc_rhs.F
647    o pkg/exf: some cleaning-up:
648      - change various "constants" into runtime parameters
649      - cleaned-up Large&Yeager04 routine which should eventually
650        replace exf_bulkformulae.F (changed names of S/R and CPP)
651        and merged various ALLOW_ATM_WIND options
652     only used with thsice pkg (in thsice_get_exf.F):
653      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
654        which are used when useStabilityFct_overIce=TRUE (= the default)
655      - change default values of ice & snow emissivity and scale downward LW
656        by ice & snow emissivity.
657    o pkg/thsice:
658     fix few little problems, in thsice_calc_thickn.F:
659      - growth vertically (and not laterally) if iceFrac == iceMaskMax
660      - melt only laterally if hIce < hThinIce (as the comments say)
661      and in thsice_extend.F:
662      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
663      - start to form ice as soon as the minimum ice-volume is reachable.
664     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
665      and cpl_aim+ocn
666    o pkg/kpp
667     - move computation of surface related input fields to KPP into a new
668       subroutine kpp_forcing_surf.F
669     - remove wrong (within bi,bj loops) EXCH calls.
670     - little cleaning (add argument myThid in last position, cvs header ...)
671     - for now, fix conservation problem by exchanging KPPviscAz (may not
672       be the best fix)
673    o pkg/seaice
674     - check for inconsistent evp parameter/cpp-flag combination
675     - remove leftover errIO flat for obsolete name list error handling
676    o OpenAD
677     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
678    
679    checkpoint59a
680    o pkg/seaice: some parameter clarifications and a little bit of clean up
681    o pkg/thsice: rename run-time parameters:
682       himin       -> hIceMin
683       himin0      -> hThinIce
684       hihig       -> hThickIce
685       i0          -> i0swFrac
686       transCoef   -> bMeltCoef
687       frac_energy -> fracMelting
688      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
689       with default values (for now) that do not change the results.
690      remove old version of thsice vars advection in pkg/seaice.
691    o in FFIELDS.h:
692      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
693      - make pLoad & sIceLoad always available (but still only used if
694         ATMOSPHERIC_LOADING is #define).
695    o pkg/kpp: replaced _KPP_RL with _RL
696    o bug fixes for vertical diffusivity computations when both KPP and
697        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
698        are no longer updating the vertical diffusivity array
699        (passed as argument) but are (re-) setting those arrays.
700    o pkg/seaice: fix bug in evp solver, while doing that
701      - change (improve?) discretization of stress computations for both
702        cgrid-lsr and evp solver
703      - add a new routine to compute strain rates
704      - the above changes lab_sea results
705      - add no slip conditions for evp solver (off by default), lsr-version
706        may follow
707      - fix exchange for shear at Z-points (does not change lab_sea)
708      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
709        (to force the user to pick a time step since there is not "safe" way
710        of choosing it)
711      - add principal stress diagnostics
712      - rearrange fields for evp a little to avoid having to call a: too many
713        exchanges and b: exchanges for stress trensor components which we do
714        not have.
715      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
716        of evp, complete rewrite for lsr case (latter is does not yet work
717        in all cases)
718    o pkg/kpp: add code to have mixing in shelf ice caverns
719      - add myThid to all kpp routines (long overdue)
720    
721    checkpoint59
722    o pkg/exf:
723      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
724        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
725      - move exf header files from lower_case.h to UPPER_CASE.h ;
726        add missing cvs Header & Name
727      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
728      - add namelist param. selectStressGridPosition, exf_monFreq
729      - retire many _CLIM routines, and remove data.exf_clim
730        + params moved to data.exf
731        + climsst, climsss now handled by exf_set_gen, i.e.
732          climss?period=0 refers to constant field,
733          climss?period=-12 to monthly forcing
734      - split up namelists in data.exf
735    o pkg/seaice:
736      - remove seaice_exch and seaice_exch_uv
737      - remove superfluous exchange of theta
738      - add myThid to seaice_budget_ocean/ice
739      - add new interface for atmospheric wind forcing (C-grid only)
740        + new routine
741        + two new field (taux, tauy for stress over ice)
742        + removed one global field (DAIRN) for C-grid case only
743    o pkg/thsise
744      - 2nd set of modifs for thsice adjoint in conjunction with exf
745    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
746    
747    checkpoint58y_post
748    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
749      vertical diffusivity, similar to that in MOM4; turned on using
750      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
751      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
752    o Added capability for 3D specification of background vertical diffusion
753      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
754      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
755      "data" file that contains the 3D vertical diffusivity coefficients.
756    o ice dynamics (pkg/seaice) with thsice thermodynamics:
757      - add code within pkg thsice to advect & diffuse sea-ice fields
758      similar to (and will replace) what has been added in  seaice_advdiff.F,
759      but: - conserving Mass, Heat & Salt.
760           - better when using non-linear advection scheme (not yet fully tested)
761           - can also be used in atmospheric set-up (for now, only the diffusion).
762    
763    checkpoint58x_post
764    o IO option for global-file compact format:
765      - add options when generating topology (utils/exch2/matlab-topology-generator)
766      - add I/O capability (pkg/mdsio).
767      - adapt utils/matlab/rdmds.m to read this format.
768      for now long-line format not yet supported by pkg/mdsio (& exch2).
769    o shelfice: add a few diagnostics
770    
771    checkpoint58w_post
772    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
773      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
774      (and replace horiVertRatio in NH code).
775      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
776                         and tutorial_plume_on_slope (sensitive to truncation)
777    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
778      directly to drive seaice model (C-grid only)
779    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
780     - reintroduce computation of wind from stress,
781     - compute tau (in exf_bulkformulae.F) from windstress averaged to
782       mass points to avoid tau = 0
783     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
784    o rdmnc.m: make it work with "global" files created with gluemnc
785    o rdmnc.m : some improvements in dealing with singleton dimension
786      (tested on all testreport mnc output files).
787    o genmake2: disable pkg/profiles if netcdf test fails.
788    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
789    o move call to cal_readparms up to make calendar parameters/variable available
790      to all packages
791    
792    checkpoint58v_post
793    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
794      useDynP_inEos_Zc tested.
795    o pkg/exf: changes to properly interpolate/mask/scale initial fields
796    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
797      and portions thereof.  See read_cs.txt for description and examples.
798    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
799      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
800      following the great-circle arc between those 2 points.
801    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
802      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
803    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
804     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
805     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
806     - still needs work (not working with some options ; efficiency to improve)
807       and serious testing.
808     - use this scheme for temperature & salinity in 2 advection test exp.:
809       advect_xy & advect_xz, respectively.
810    
811    checkpoint58u_post
812    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
813    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
814    o testreport: add option "-skipdir" to skip some test.
815    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
816      momentum calculation.
817    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
818    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
819      remove checkpoint.F and the_correction_step.F (no longer used);
820      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
821    o add option (linFSConserveTr) to correct for tracer source/sink due to
822      Linear Free surface
823    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
824    o pkg/thsice: fix reading mnc-pickups
825    
826    checkpoint58t_post
827    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
828    o pkg/mdsio:
829     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
830       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
831       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
832     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
833     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
834       either MDS_READ_FIELD or MDS_WRITE_FIELD )
835     - new S/R (to replace MDSWRITEMETA), which allows to write more
836       informations (variable names, time ...) to meta files.
837     - modify rdmds.m to give back the meta file content.
838    o pkg/diagnostics: change vertical interpolation to be safer, and more
839       flexible (define p-levels to interpolate to in data.diagnostics);
840      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
841       diagnostic pointer.
842    o pkg/seaice: more cleaning up of seaice_growth, added many comments
843    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
844    o fix multi-category seaice:
845     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
846       SEAICE_MULTICATEGORY
847     - fix short wave heat flux
848    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
849       and allow to use EVP solver. Change forward lab_sea: test both EVP
850       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
851    o Initial check-in of lab_sea adjoint
852      (very similar to natl_box_adjoint/code_seaice)
853      * used C-grid and EVP solver
854      * used KPP, GM/Redi
855      * uses inAdExact=.TRUE.
856      * gradient checks fail for both ADM and TLM
857        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
858        f.d. gradients actually seem more problematic than ADM, TLM gradients;
859        issue is related to forward mismatch between g77 an ifort
860    o pkg/seaice: overhaul of thermodynamics
861     - growth.F and groatb.F are replaced by new routine seaice_growth.F
862     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
863     - move a few global fields out of SEAICE.h into seaice_growth.F and
864       make them 2D (FICE/QNETO/ ...)
865     - remove FO (it is the same as QNETO)
866     - introduce a few local fields to avoid modifying external fields such
867       as atemp, etc.
868    
869    checkpoint58s_post
870    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
871      changed exf_set_gen.F so that
872        genperiod=0 means input file is one time-constant field and
873        genperiod=-12 means input file contains 12 monthly means
874    o CG2D: use pre-computed solver main-diagonal (stored in common block);
875      this affects truncation error ; generate new output file for exp. which
876      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
877        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
878        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
879        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
880        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
881        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
882    o start implementation of deep-atmosphere and anelastic formulation
883    o verification: remove 2nd copy of input files and use script "prepare_run"
884      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
885    o mom_common/vecinv/fluxform: fix a few initialisation isssues
886    o profiles: fix for multithreaded case
887    
888    o diagnostics: rename few diags:
889      s/'PRESSURE'/'RCENTER '/g
890      s/'TICE    '/'oceFreez'/g
891      s/'TAUX    '/'oceTAUX '/g
892      s/'TAUY    '/'oceTAUY '/g
893      s/'SWFLUX  '/'oceQsw  '/g
894      s/DIFx/DFxE/g
895      s/DIFy/DFyE/g
896      and add few ocean-forcing diagnostics:
897      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
898    o modifications to pkg/seaice/growth.F and budget.F, which change results of
899      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
900      as actual snow thickness.  It now refers everywhere to effective snow
901      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
902    
903    checkpoint58r_post
904    o modifications to pkg/seaice/growth.F, which change results of
905      lab_sea experiment: fixes pertain to melting snow over open water, to
906      masking EVAP under sea ice, and to using the correct AREA variable for
907      computations of EVAP, PRECIP, HSNOW, and GHEFF
908    o add ability to read bathy, salt, and theta using MNC (off by def)
909    o add flooding algorithm and advection of HSNOW for pkg/seaice;
910      both are turned off by default and do no change any results
911    o seaice advection with pkg/thsice: a step toward the use of non-linear
912      advection scheme, but #ifdef or commented out for now (requires more EXCH).
913    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
914      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
915      in natl_box (affects results @ truncation level: update output.txt)
916    o multi-threading and IO:
917      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
918      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
919        (needed to work with SingleCpuIO): tested in all verif. exp.
920    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
921      affects the results (but none of the verification test uses this scheme).
922    o Adding some pkg/diagnostics capability to pkg/seaice
923      (will certainly be subject to changes)
924    o ctrl: adding new control variables:
925      lwflux, lwdown, evap, snowprecip, apressure, runoff
926    
927    checkpoint58q_post
928    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
929      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
930      high_res_cube configuration by 4% on Columbia.
931    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
932      add (in global_with_exf/code) a version of EXF_INTERP_READ without
933      dynamical allocation (seems to work in multi-threaded).
934    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
935      single CPU io) so that TAF does not have to see EESUPPORT.h
936    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
937    
938    checkpoint58p_post
939    o obcs: stop if obcs is used with useCDscheme = .true.
940    o shelfice:
941     - fix a sign error so that no slip at shelfice interface works
942     - remove stop for combination non-hydrostatic code and shelfice. That does
943       not mean, that the results are correct, but at least they are numerically
944       stable
945    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
946    o added adjoint exch routined for all exch*3d* routines
947      and updated flow directives
948    
949    checkpoint58o_post
950    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
951      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
952    o change controling S/R for writing pickup file (new S/R do_write_pickup)
953      and clean-up reading/writing of pickup files.
954    o fix local version of read/write pickup (NH part) in rotating_tank/code
955    o simplify EXCH interface:
956     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
957     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
958    o added the regrid package
959    o shelfice:
960     - add a simple boundary layer scheme to reduce noise
961     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
962    
963    checkpoint58n_post
964    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
965       local variable (not in common block).
966    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
967      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
968      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
969        to work with SingleCpuIO.
970    o add "_d 0" to real constant of pkg/cfc subroutines ;
971       update exp. cfc_exemple & tutorial_cfc_offline output files.
972    o multi-threading and IO:
973      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
974        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
975      - barrier before and after reading.
976      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
977      - avoid using MDS_WRITELOCAL for LAND pkg output.
978      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
979        common-block variables ; Allows multi-threading with master-thread IO.
980    o change default MAX_NO_THREADS from 32 to 4 ;
981      and stop cleanly when MAX_NO_THREADS is too small.
982    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
983    
984    checkpoint58m_post
985    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
986       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
987    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
988       keep global_ocean.90x40x15 (for AD testing) with former secondary test
989       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
990    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
991        add MITgcm_tutorials (= code + all the tutorials)
992    o ecco, option to compute cost for total ssh (mean+anom)
993    o consistent with addition of ptracer and ssh in pkg/profiles
994    o profiles: adding ptracer and ssh
995    o testreport: change multi-test output-file name
996      (from output.txt.{name} to output.{name}.txt)
997    o profiles: now ok for mutli-tiles case
998    o seaice: add 4 parameters for different advection schemes for area,
999      (effective) seaice thickness, enthalphy, and snow height. Their default
1000      is the standard parameter SEAICEadvScheme
1001    o calc_gw:
1002     - add cosFacU in zonal viscous flux (harmonic.visc.).
1003     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
1004       of tutorial_plume_on_slope.
1005    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
1006    o calc_gw: true flux-form, account for horizontal grid spacing.
1007      update rotating_tank results, but not plume_on_slope (affected at
1008      truncation level, 11 digits).
1009    
1010    checkpoint58l_post
1011    o calc_gw:
1012     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
1013     - remove side-drag for now (need to fix it); update plume_on_slope results.
1014     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
1015    o commit code to make SST/SSS weights spatially variable
1016      (based on either variable in-situ or variable initial T/S weights)
1017    o pkg/ecco:
1018      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
1019        now based on horizontally varying weights wthetaLev, wsaltLev
1020      * cost_averagesflags now returns year indices in addition to day, month
1021      * sflux balance is performed on annual basis
1022        (sflxumm, sfluxmm2, bal_sfluxmm)
1023      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
1024        including separate counting and multipliers
1025    o pkg/rbcs
1026      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
1027    
1028    checkpoint58k_post
1029    o testreport:
1030     - always build in dir. "build" (if not there, mkdir build instead of building
1031       & running in input)
1032     - run in dir run (if it exists), in build otherwise.
1033     - call prepare_run (if input/prepare_run exists)
1034     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
1035    o pkg/exf modifications to interpolation and rotation routines for more
1036       reasonable treatment of North Pole singularity: for tracers North Pole
1037       value is set to northernmost zonal-mean value, for zonal velocity it is
1038       set to zero, and for meridional velocity it is set to northernmost value.
1039    o pkg/exf/exf_check_range.F
1040     - add tile index to diagnostics and move stop statement to the very
1041       end of the routine.
1042    o pkg/diagnostics: (diagnostics_main_init.F)
1043      define title of isomorphic variables according to the current config.
1044    o pkg/thsice with pkg/seaice dynamics:
1045    - fix domain of computation (interior only, required for exf) and do exchanges
1046    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
1047    o towards a standard way of dealing with multi-threading in MONITOR
1048      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
1049    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
1050       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
1051    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
1052    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
1053    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
1054       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
1055    o tracer advection:
1056     - clean-up and simplify calc_common_factors.F
1057     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
1058       advection subroutine (but still not used within DST advection S/R)
1059    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
1060    
1061    checkpoint58j_post
1062    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
1063      from file (collects calls previously in FORWARD_STEP)
1064    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
1065    o adjoint store dir. adjusted accordingly
1066    o genmake2
1067      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
1068    
1069    checkpoint58i_post
1070    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
1071      on wind stress (SEAICEstressFactor defaults to 1.)
1072    o Total number of Timers is finite (<=40): comment out 2 non-essential one
1073      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
1074    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
1075      on CS-grid: no longer loosing mass.
1076    o exf & curvilinear-grid: no longer modify longitude xC & xG.
1077    o pkg/ggl90: fix sloppy output and fix a bug
1078    o pkg/seaice: added SEAICEuseEVPpickup parameter
1079      - Set to false in order to start EVP solver with
1080        non-EVP pickup files when using SEAICEuseEVP
1081      - fix sign error in diffusion in seaice_calc_rhs
1082    
1083    checkpoint58h_post
1084    * Modifications for bottom topography control
1085      o replace hFacC by _hFacC at various places
1086      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
1087      o add non-self-adjoint cg2d_nsa
1088      o update autodiff support routines
1089      o re-initialise hfac after ctrl_depth_ini
1090      o works for 5x5 box, doesnt work for global_ocean.90x40x15
1091    * Adding verification for 5x5 box (4-layer) bottom topography control
1092    
1093    checkpoint58g_post
1094    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
1095       used for mean seasonal cycle, mean diurnal cycle); add an example
1096       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
1097    o pkg/ggl90:
1098      - add parameter (minimum surface kinetic energy)
1099      - fix bug (avoiding division by zero)
1100    o couple pkg/thsice to pkg/seaice:
1101      - modify advection in seaice to accomodate new scalar fields to be advected
1102      - only muliDimAdection scheme work with seaice/thsice
1103      - mapping of thsice-variables to seaice-variables, back and forth
1104      - does not break the verification experiments, but does not give the
1105        desired results either
1106    o pkg/seaice
1107      - make (default) second order advection a bit less confusing?
1108    
1109    checkpoint58f_post
1110    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
1111      to pkg/seaice):
1112      - new routines thsice_map_exf and thsice_get_exf provide the interface
1113      - add an additional formal parameter to thsice_solve4temp
1114    o pkg/exf:
1115      - add new fields wspeed, snowprecip (to be able to couple to thsice)
1116      - correct Stefan-Boltzmann constant
1117      - new parameter for longwave surface emittance
1118      - separate some stuff from exf_bulkformulae into new routines  
1119        exf_radiation, exf_wind
1120      - add new parameters and constants: longwave emissivity for ocean, ice
1121        and snow, evaporation parameters over ice
1122      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
1123        either wind from stress or stress from wind
1124    o pkg/thSIce:
1125    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
1126    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
1127       and THSICE_CALC_THICKN
1128    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
1129    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
1130      to make debugging easier.
1131    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
1132    o pkg/bulk_force:
1133      - clean-up comments and parameters ;
1134      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
1135    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
1136      generate new output for test-experiment: aim.5l_cs.thSI
1137    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
1138      testreport accordingly
1139    
1140    checkpoint58e_post
1141    o SEAICE_CGRID adjoint done
1142    o R_STAR adjoint implemented.
1143      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
1144      * need to sort out init. of h0facc, etc.
1145    o Make pkg/profile fully independent of ecco,cost, etc. stuff
1146      to be able to use it in pure forward.
1147    
1148    checkpoint58d_post
1149    o upgrade simple test-experiment to tutorial example:
1150     step.1: duplicate the experiment and (step.2) will remove the old copy.
1151      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
1152      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
1153      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
1154      tutorial_global_oce_biogeo    <- copy of dic_example
1155      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
1156      tutorial_plume_on_slope       <- copy of plume_on_slope
1157      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
1158      tutorial_global_oce_optim     <- empty for now (David ?)
1159      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
1160     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
1161    o correct a sign problem in cost_scat.F
1162    o obcs and ptracers: fix boundary conditions for advections schemes
1163      with larger stencil
1164    o thsice adjoint: start
1165    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
1166      completeness
1167    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
1168      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
1169    o ptracers adjoint:
1170      * avoid extensive recomputatations
1171      * fix missing re-init. of gptr (missed by TAF)
1172    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
1173      me to turn off the excessive output to STDOUT that this package produces
1174    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
1175      and add those terms in Vector-Invariant formulation.
1176    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
1177      if the control period (xx_hfluxperiod etc) is 0
1178    o in profiles pkg, clean routines and fix details
1179    o in ecco pkg, reading ssh data:
1180      fix problem in case the model does not start at iter0=0
1181    o fix mnc-pickup/restart for ptracers
1182    o new package prifiles:
1183      code to compute profile-based cost by Gael Forget
1184      (modifs in ecco, ctrl, autodiff)
1185    o Benign bug fix in initialization (spotted by M. Mazloff) of
1186      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
1187    
1188    checkpoint58c_post
1189    o adjoint: finish NLFS adjoint and provide reference output in
1190      verification/global_ocean.90x40x15/results_ad_nlfs
1191    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
1192      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
1193      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
1194      with SEAICE_CGRID defined.
1195    o move calendarDumps from "data" to "data.cal" and clean-up the code
1196      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
1197    o add useEXF & useCAL flags (for now, set in hard-coded way)
1198    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
1199      (were missing in NH mode, and wrong in quasihydrostatic mode).
1200      waiting for Chris updated version of calc_gw to add those CALLs.
1201    o fix bug in quasihydrostatic S/R ;
1202      add a test for this option: global_ocean.90x40x15.qshyd
1203    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
1204      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
1205    o add on/off flag useOffLine for package OFFLINE
1206    o seaice:
1207      - modify advection so that it works also on the C-grid
1208      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
1209        problem in multi-tile runs with C-grid
1210      - add flags for clipping ice velocities and/or masking solver forcing
1211      - fix drag (ocean on ice) formulation and a bug that caused noise in the
1212        C-grid solver
1213      - added a few comments to seaice_diffusion.F
1214      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
1215        are now exclusive)
1216      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
1217        required re-ordering the code a little:
1218       + make DAIRN global variable (defined in SEAICE)
1219       + move computation of the viscosities eta and zeta into a new separate
1220         routine (because I need to recompute them in seaice_ocean_stress.F)
1221    
1222  checkpoint58b_post  checkpoint58b_post
1223  o AIM+thSIce: fix sign of Short-Wave through the Ice ;  o AIM+thSIce: fix sign of Short-Wave through the Ice ;
1224    update output.txt of exp. aim.5l_cs.thSI    update output.txt of exp. aim.5l_cs.thSI

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