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revision 1.7 by adcroft, Mon Jun 22 16:24:50 1998 UTC revision 1.631 by mlosch, Wed Mar 15 15:05:53 2006 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o seaice:
8      - modify advection so that it works also on the C-grid
9      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
10        problem in multi-tile runs with C-grid
11      - remove velocity clipping from seaice_dynsolver with C-grid
12      - fix drag (ocean on ice) formulation and a bug that caused noise in the
13        C-grid solver
14    
15    checkpoint58b_post
16    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
17      update output.txt of exp. aim.5l_cs.thSI
18    o various mnc cleanups and improvements:
19      + shrink lookup tables by factor of ~4
20      + better error reporting when running out of lookup space
21      + able to handle longer path/file names (up to 500 chars)
22    o adjoint:
23      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
24      - TBD: "hidden" mom_vecinv recomp. in dynamics
25    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
26     (allow to differentiate between forcing components using new integer flags:
27      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
28     and add new flag to put Dissipation tendency out of Adams-Bashforth.
29    o ecco
30      - enable trend removal from SSH anomaly obs.
31    o adjoint
32      - a fix for PmEpR when #undef EXACT_CONSERV
33      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
34      - try to fix "hidden" recomp. in forward_step for NLFS
35        (NLFS seems broken sometimes after I checked it in)
36    o seaice:
37     - add c-grid version of the dynamic solver:
38       + three new routines that are the c-grid substitute lsr, dynsolver
39         and ostres
40       + put a few fields that were local to dynsolver into global common
41         blocks, so that I can move the computation of stresses etc into
42         seaice_lsr (saves coding but may break the adjoint).
43     - replace more hardwired parameters by runtime parameters
44     - add ice masks that mask the rhs of the implicit solvers where there
45       is no ice (commented out in seaice_dynsolver, because i am not sure
46       if this works properly), eventually this should replace the clipping
47       of ice velocities in seaice_dynsolver to +/-40cm/s.
48    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
49      include it only where its needed
50    o move balancing of fluxes before the call of external_forcing_surf
51    o seaice:
52      - correct units of turning angles (now they are really in degrees)
53      - move computation of GWATX/Y out of main routine into dynsolver
54      - initialize GWATX/Y in seaice_init
55    o Apply mask on Fresh-Water flux (needed for SSH forcing).
56      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
57    o seaice: add runtime flags for turning angles (default to zero)
58    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
59      and trend from exf forcing and ctrl control adjustments
60    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
61      (since checkpoint57x_post)
62    o change the default rotation period to 86164.s = the Earth rotation
63    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
64      and based on a reference stratification. Tested within hs94.cs-32x32x5.
65    o seaice advection: add code for choosing between the default (2nd order
66      central differences) and multiDim advection schemes provided by
67      pkg/generic_advdiff
68    o seaice:
69      - removed all references to SEAICE_GRID.h fields from
70        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
71        (cubed-sphere configuration will change a little)
72      - grid computations in seaice_init are obsolete now.
73      - cleaned up code a little so that is easier to read (hopefully).
74      - added new (better?) discretizations of default advection and diffusion
75        (turn on with SEAICEuseFluxForm)
76      - replace 1 in 3d global fields by kSurface in growth.F
77      
78    checkpoint58a_post
79    o seaice:
80      - bug fix in advect.F
81    o shelfice:
82      - separate shelfice load anomaly from pload (breaks with time
83        dependent forcing), => introduce constant field shelficeLoadAnomaly.
84        Its default is 0., but it may be computed more cleverly from (unknown)
85        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
86        done offline. A good approximation of the pressure load anomaly is
87        necessary to avoid large initial adjustment processes underneath
88        deep-reaching shelfice.
89      - small fix in ISOMIP shelfice_thermodynamics
90      - add more sophisticated thermodynamics of Hellmer (1989), this is
91        now the default
92      - give a few constants more intuitive names
93    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
94      if bulk formulae are used in long integration (especially EmPmR). Turn
95      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
96      if balancePrintMean, the imbalance that is substracted is printed to
97      STDOUT.
98    o fix bug (typo) in obcs_apply_eta.F
99    o add a new package shelfice which enables us to model the circulation
100      underneath shelf-ice with draughts of hundreds of meters.
101     - works
102     - to do: + include improved thermodynamics
103              + check whether kSurfC (from model/inc/SURFACE.h) can be used
104                instead of new field kTopC
105              + can we use topoFile, Ro_surf and existing code in ini_depth.F
106                instead of new field R_shelfIce and new code in ini_depth.F
107                and ini_mask_etc.F?
108              + adjust vertical mixing schemes?
109    o seaice pkg:
110     - add a cpp-flag to include a simple formula for a salinity dependent
111       freezing point of sea water at the surface
112     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
113       meridional stresses are now different (and hopefully correct)
114    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
115       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
116       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
117    o pkg/diagnostics: add options and parameters for regional-statistics
118       diagnostics ; define regions by reading a region-mask from a file
119       (might add other options later)
120    o pkg/bulk_force:
121     - add option and parameters to use AIM surface-flux formulae.
122     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
123       others forcing fields (defined in PARM05, parameter file "data") are loaded
124       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
125     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
126     - use the right EXCH call for uwind,vwind (to work on CS-grid).
127     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
128       and parameters (note: calcWindStress replaces .NOT.readwindstress).
129     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
130    
131    checkpoint58
132    o add "--embed-source" option to genmake2 which, when the supporting
133      tools can be compiled (as determined by genmake2) will turn on the
134      embed_files package which then embeds the entire MITgcm source code
135      (*.[fFhc] + Makefile) used for the build within the executable
136      - requested by CNH but off by default
137      - adds a paltry <9MB to the mitgcmuv executable in most cases
138      - only writes the output when useEMBEDSRC in eedata is true
139    o clean up 3-dim. relaxation codes:
140      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
141      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
142      * Thanks to Tom Haine for testing!
143    
144    checkpoint57z_post
145    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
146      affects output (@ truncation level) of exp. plume_on_slope ; updated.
147    o fix the pickup behavior for obcs in combination with ptracers
148    o fix a bug in ptracers_external_fields_load
149    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
150      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
151    o transfered surface NH pressure to eta field (if exactConserv).
152    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
153         and update lab_sea output.txt file.
154    o completing 3-dim. relaxation code: additional term
155         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
156      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
157      * At compile time, in "EXF_OPTIONS.h" set
158          #define  ALLOW_CLIMTEMP_RELAXATION
159          #define  ALLOW_CLIMSALT_RELAXATION
160      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
161          tauThetaClimRelax3Dim = 15552000.0,
162          tauSaltClimRelax3Dim  = 15552000.0,
163      * 3 cases:
164          1) Use a constant-in-time 3-dim. field
165          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
166          3) Real-time relax. to time-evolving prescribed field
167    o Adding Laplacian-type smoothness constraint on
168      initial and boundary (forcing) controls (ic, bc)
169      * enable at compile-time via
170        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
171      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
172      * Absolute scale somewhat unclear so far
173      * no area weighting was included since no other cost term does so far
174    
175    checkpoint57y_post
176    First step for a NLFS adjoint
177    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
178    o new init. routines for calc_r_star, calc_surf_dr
179    o still need to deal with ini_masks_etc
180    o testreport seemed happy
181    checkpoint57y_pre
182    
183    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
184    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
185    o add new offset feature to offline pkg (plus minor cleanup)
186    o cfc fixes for final year of integration
187    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
188      be in GCHEM_OPTIONS).
189    
190    checkpoint57x_post
191    o fix testreport Pb in multiple test experiment.
192    o cleanup our namelist syntax in verification:
193      - make it more F95 standards compliant (some work still needed)
194      - allows the vast majority of our tests to work with gfortran
195    o Non-Hydrostatic:
196     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
197     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
198    o Allow to apply AB on T,S rather than on AB(gT,gS):
199     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
200     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
201       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
202     - need a "clever" read_pickup to restart from the other AB formulation
203    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
204    o remove some unused variables (reduces number of compiler warnings)
205    o adjoint
206      * Disable useVariableViscosity for adjoint for time being
207        (there are a number of extensive recomputations)
208      * Initialize certain variables needed for adjoint
209    
210    checkpoint57w_post
211    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
212                 fix the singleCpuIO RS version of MDSWRITEFIELD
213       and add a WARNING if using globalFiles=T with multi-processors.
214    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
215      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
216    o tracer advection scheme:
217      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
218       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
219       was not very convenient).
220      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
221       (further tests needed for the implicit DST & Flux-Limiter schemes).
222    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
223      and sRef for convenience, handy, when you want to initialize
224      ptracers in a large domain with a constant non-zero value. Also,
225      untangle ptracers_init.F a little.
226    
227    checkpoint57v_post
228    o change dome exp. to use variable viscosity in side-drag terms.
229    o remove all the files from the cfc_offline test since they are now
230      incorporated into tutorial_cfc_offline which has been producing
231      identical results for a few days of testing
232    o add new parameter: sideDragFactor to enable half-slip-side BC
233      and change side-drag S/R to use viscosity from mom_calc_visc
234      (can switch back by setting sideDragFactor=0.); affects results at
235      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
236       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
237    o vorticity & strain are now computed without masking, to account for
238      no-slip-side BC in variable viscosity calculation ; mask is applied
239      anyway later on, before computing advection/coriolis terms.
240    o modify exp4 to test new obcs support for reading from external files
241      and for passive tracers
242    o fix behavior of ptracers_monitor when monitor output is written to a
243      netcdf-file; still not independent of monitor.F (writes in the same
244      file).
245    o change default value of tRef (put a uniform, meaningful value for ocean
246      & atmos) and initialize sRef (was missing, as Martin mentioned).
247    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
248      to be proportional to enstrophy dissipation length.  Thus,
249       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
250      This is now consistent with Smagorinsky and with the manual.
251    
252    checkpoint57u_post
253    o OBCS and PTRACERS: add open boundary support for passive tracers
254      - either use homogenous (pseudo) v.Neumann conditions or prescribe
255        OB-values from file; this is not different from the way theta and salinity
256        are treated
257      - however, Orlanski-radiation conditions are not supported, and the model
258        will stop if you use pTracers and Orlanski at the same time.
259      - beefed up the rountine obcs_external_fields_load: now only those open
260        boundary values are overwritten with values from files for which there
261        are really files, otherwise the OB-fields remain untouched. This makes
262        it possible to use different OBs at different ends of the domain (as
263        with EXF)
264    o reduce number of exch calls in shap_filt (s2).
265    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
266      truncation level) 4/5 MLAdjust test results (11&12 digits match).
267    
268    checkpoint57t_post
269    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
270    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
271      same truncation, independent of the face number: affects affects several
272      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
273    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
274      note that biharmonic viscosity + no-slip was not tested in any experiment.
275    o fix bug in non-linear free-surf side-drag ; generate new output for
276      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
277    o make mnc honor the writeBinaryPrec flag for most kinds of output
278    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
279    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
280      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
281    o add brackets in multi-terms sum to get same truncation, independent of
282      the face number (manage to get exactly same value of gU,gV at the cs-edge)
283      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
284    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
285      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
286      a maximum grid-scale Reynolds number.  Also, changes all length calculations
287      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
288      Suggested values of viscosity parameters found in mom_calc_visc.
289      Many new viscosity diagnostics available.
290    
291    checkpoint57s_post
292    o Add clearing-house for viscosity calculations, mom_calc_visc and
293      correct numerous bugs in LeithD and Smagorinsky discretizations.  
294      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
295      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
296      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
297      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
298      The Strain-Tension form is now called with useStrainTensonVisc=.true.
299      ViscAhStrain and viscAhTension are now retired.
300    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
301    o In response to JMC's bug report, genmake2 now ignores any soft-links
302      that it finds in the *current* directory when searching for files.
303      Soft-links found in any other source directories will still work as
304      they did before.
305    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
306      a C routine to unlimit the stack size
307    o mnc-ify pkg/aim snapshot vars
308    o mnc-ify pkg/land as requested by Daniel
309    o various changes to mnc including:
310      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
311      - output can now be grouped so that all files within a group
312          change the ITER portion of their names in lock-step together
313      - can now read ("global") PER-FACE (in addition to PER-TILE) files
314          and works with both EXCH1 and EXCH2 (but needs more testing)
315      - writing works for all verification test cases w/ g77 on Linux
316    
317    checkpoint57r_post
318    o make MNC variable initialization happen earlier
319    o add diagnostics for (almost) each term of the momentum Eq.
320    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
321    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
322    o remove MINIMAL_TAVE_OUTPUT option ;
323      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
324    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
325      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
326    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
327    o add time-dependent SST, SSS control
328    o cost terms in ecco/ modularized (new cost_generic.F)
329    o cost_averages routines are modularized (new cost_averagesgeneric.F)
330    o new infrastructure for seaice model vs. obs misfits in seaice/
331      * driver from the_main_loop.F is seaice_cost_driver.F
332      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
333      * gradient check in Exp. 6a of natl_box_adjoint/
334    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
335      (see README file)
336    
337    checkpoint57q_post
338    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
339    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
340      - bug was reported by Jean-Michel and Ian Fenty
341    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
342      update exp. cpl_aim+ocn output.
343    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
344      Needed for high-res. runs with large global files
345      to be able to limit tapelev size
346    o Changed some tests for adjoint:
347      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
348      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
349      * global_ocean.90x40x15/ back to default 3-level checkpointing
350    o Modifications to enable scripted COMMON to MODULE conversion
351      * verification/OpenAD/code/ has necessary scripts and description;
352      * converts, compiles and runs successfully;
353    
354    checkpoint57p_post
355    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
356    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
357      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
358    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
359    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
360      (was already the case for dissipation with mom_vecinv,
361       and also the case for grad.PhiHyd when staggered-timeStep)
362      This will allow to put dissipation out-off the AB time-stepping.
363     Unfortunately, affects truncation error. Update output of exp. that "fails"
364      (cg2d matching number) and leave the others for later: front_relax(10),
365      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
366      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
367    
368    checkpoint57o_post
369    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
370      (2) its ready to be documented during the 20050801 DocFest
371    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
372      for ideal_2D_oce and lab_sea on linux_ia32_g77
373    o set to #undef CTRL_SET_OLD_MAXCVARS_30
374      in global1x1_tot/code_seaice_adj to access indices 32, 33
375      (worth another tag)
376    
377    checkpoint57n_post
378    o adding precip control xx_precip 32
379    o adding swflux control xx_swflux 33
380    o Replacing 10 forcing penalty cost routines by 1 generic.
381    o Implementing partitioning in time-mean and variable adjustment
382      for atmos. state.
383    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
384    o in natl_box_adjoint:
385      * updated exp 1 to 10
386        (but does not have time-mean vs. variable split results yet)
387    o updated global1x1/*_seaice_adj/
388      to incorporate latest changes
389    o enable useSingleCpuIO for mdsio vector routines
390      (applies in particular to tapelev I/O)
391    o removed inefficient K-loop in all active_file*control*.F
392    
393    checkpoint57m_post
394    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
395      and advect_cs (use EXCH-2 and standard cs-32 grid files).
396    o pkg/exch2: filling of face-corner halo regions is optional
397      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
398    
399    checkpoint57l_post
400     tag before updating tutorials (pre-release-2)
401    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
402       for output and interpolation of input fields onto model grid)
403    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
404       Affects results of exp. rotating_tank ; update output.txt.
405    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
406          and taking the square quantity and/or using a fraction-weight field.
407    o fix aim_diagnostics_init.F mate numbers.
408    o add mnc output capability to diagnostics/diagstat and update
409      our cvsignore files for the ACSII output generated
410    
411    checkpoint57k_post
412    o lab_sea now uses diagnostics package and provides a suite of
413      new EXF diagnostics output.
414    
415    checkpoint57j_post
416    o exf
417      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
418        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
419        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
420      * extended diagnostics output
421        - now includes all EXF variables
422        - hs, hl moved to common block
423        - separate S/R for diagnostics, called after ctrl vector is added
424        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
425        - EXFqnet contains true Qnet (i.e. includes qsw)
426      * updated verif. lab_sea, global_with_exf
427      * Rearranging hflux (exf_mapfields -> exf_getforcing)
428        to ensure that diagnostics sees a true EXFqnet
429    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
430    o diagnostics pkg: change pointers so that 1 diagnostic can be used
431      several times with different frequencies.
432    o mnc-ify the thsice package as requested by Daniel Enderton
433      - the monitor--MNC output needs work
434      - many attributes need to be added (most are currently blank)
435    o mnc-ify theaim_v23 package as requested by Daniel Enderton
436      - many attributes need to be added (most are currently blank)
437    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
438    o add Sadourny like discretization to the 4th.O vorticity advection scheme
439    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
440      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
441         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
442    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
443     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
444    
445    checkpoint57i_post
446    o Diagnostics package was changed: diagnostic allocation is now deactivated
447      by setting an empty file name in the namelist (used to be by setting 0 frequency)
448    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
449      add 1rst Order upwind vertical Shear.
450    o add a quick fix for A/B checkpointing in OFFLINE mode
451    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
452      end-run around the C/Fortran linking horror in eesup/src/timers.F
453    o added pkg/runclock: allows user to terminate run based on wall clock
454    o added non-hydrostatic scaling parameter: nh_am2
455    o pkg/my82: futile attempt to make results compiler-independent by adding
456      some "_d 0", etc. no effect.
457    o for mnc output, fill the 'T' coordinate var with myTime and create a
458      separate 'iter' variable for iteration count
459    o pkg/diagnostics:
460      add new capability: output of Global/Regional & per-level statistics ;
461      tested against monitor output (including land & thSIce) on various exp.
462    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
463    
464    checkpoint57h_done
465      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
466      data.diagnostics, data.gchem, data.ptracers) is done.
467    
468    o pkg/diagnostics: prepare for Global/Regional statistics.
469      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
470    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
471      and rename it: DIFFERENT_MULTIPLE
472    
473    checkpoint57h_post
474    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
475    o pkg/diagnostics: change output frequency, now in seconds (instead
476      of Nb of iterations). This requires to change data.diagnostics.
477    checkpoint57h_pre
478    
479    o in mnc, let the user create the output dir if both mnc_outdir_date
480      and mnc_outdir_num are false
481    o add fflags() to pkg/diagnostics which allows one to specify, on a
482      per-file basis, the file precision [default behavior is unchanged]
483    o added diagnostics to pkg/kpp, including computation of mixed layer
484      depth based on a temperature/density criterion
485    o updated verification/natl_box to test the new pkg/kpp diagnostics
486    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
487    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
488    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
489      not mnc -- this mistake was found by JMC and is now corrected
490    
491    checkpoint57g_post
492    o add Adams-Bashforth 3rd Order time stepping:
493      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
494      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
495    checkpoint57g_pre
496    
497    o make lambda[Theta,Salt]ClimRelax spatially varying
498      (default remains spatially uniform constant based on tau)
499    o added new control variables
500      * init. uVel, vVel, etanN
501      * lambda[Theta,Salt]ClimRelax
502    o separate masks used for ctrl_pack/unpack 'from write_grid' output
503      (suggested by G. Forget)
504    
505    checkpoint57f_post
506    o add parameter "baseTime" = model base time = time at iteration zero
507      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
508      account for baseTime shift
509    o move Coriolis arrays from PARAMS.h to GRID.h
510    checkpoint57f_pre
511    
512    o mnc-ifying the seaice package
513    o introduced an alternative length scale calculation for use in the limiting
514      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
515    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
516    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
517      as well as grad(vort3).  Made it compatible with both approximate form
518      for the cubed sphere and full form of these gradients.  Added flag
519      useFullLeith to select between approximate and full form.  
520    o add "d0" in getcon.F to reduce differences between compilers/platforms
521      update output.txt of exp. fizhi-gridalt-hs
522    o change port_rand funtion to allow to set the seed.
523    o fix obscure MNC bug involving conversion between reals and integers
524      - it caused no problems with certain (eg. gcc, ifc) compilers but the
525        new version is now more standards-compliant
526    o adjoint-related modifications
527      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
528      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
529      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
530    
531    checkpoint57e_post
532    o Adding eddy stress controls a la Ferreira et al.
533    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
534    
535    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
536      update output.txt of exp. fizhi-gridalt-hs
537    o add more "Z" dimensions and associated coordinate vars to MNC
538    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
539    o parameter calendarDumps: when set, approximate months (30-31 days) and years
540      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
541      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
542      months and years.  Requires pkg/cal.
543    o diagnostics: add pickup functionality
544      - off by default for backwards compatibility
545      - current version only uses MDSIO -- MNC will be added
546    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
547    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
548    
549    checkpoint57d_post
550    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
551    o modify verification/ideal_2D_oce so that it tests the creation of mnc
552      output from the diagnostics package
553    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
554    o make genmake2 more portable by using ".$FS" instead of ".f" for more
555      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
556    o add coordinate variables to the MNC output from the diagnostics package
557    o change MNC-flags default value: true when useMNC=TRUE
558    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
559      the ability (off by default) to read the grid information using MNC
560    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
561    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
562    o do snap-shot diagnostics at the middle of the time-interval (instead of
563      at the end).
564    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
565      new test for AIM with thSIce + slab-ocean
566    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
567    o move state variable diagnostics to the beginning of the time step ;
568      (note: still needs some work specially for snap-shot diagnostics)
569      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
570    
571    checkpoint57c_post
572    o Change testing option (-ieee) to get closer agreement between g77 & ifort
573    o generate new output.txt files on faulks with g77 & the new -ieee option
574    checkpoint57c_pre
575    
576    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
577      update output.txt of exp. global_ocean.90x40x15
578    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
579      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
580    o add saltFlux(+File) forcing capability with periodicExternalForcing
581    o allow to use pkg diagnostics for GM-Redi & ThSIce output
582    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
583    o improvements for the MNC output from DIAGNOSTICS:
584      - correct handling of the unlimitied dimension
585      - all dims now have associated coordinate variables
586      - variables located at U, V, and Corner ("Z") points are now written
587        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
588        *all* data points are output
589    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
590    o added pkg/seaice/seaice_monitor.F
591    o mdsio_readfield.F can now read files visible only to master MPI process.
592    o pkg/seaice: some test code for ice-modified ocean stress
593    o exf_getffields interpolation defaults to bilinear for all scalar forcing
594      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
595      spurious negative numbers for precipitation and humidity.  Will cause
596      some small numerical differences for integrations using pkg/exf/exf_interp.F.
597    o pkg/ctrl/
598      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
599        May be enabled via doPackDiag
600      *  introduce z-scaling of
601         + gradient (doZscalePack) and
602         + control (doZscaleUnpack)
603    o pkg/mdsio/
604      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
605      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
606    
607    checkpoint57b_post
608    o simplify options in diagnostics_fill arguments (remove weird combinations)
609    o fix MNC coordinate variables so that they now contain per-face index
610      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
611      general, EXCH2 grids are only aligned to a "local" coordinate system
612    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
613    o Implement instantaneous output within pkg diagnostics:
614      setting a negative frequency in data.diagnostics produces
615     "snap-shot" output (as opposed to time-average if freq > 0)
616    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
617      NOTE: change ptracer diagnostics name: use 2 characters to work with
618            more than 9 tracers. Add also diagnostics of advect & diffus flux.
619    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
620      becomes the coordinate variable for the 'T' dimension
621    o add CF-style coordinate variables to MNC
622      - just a first cut:  numbers are meaningless on the cubesphere and
623        missing along the T axis but otherwise it works!
624    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
625    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
626    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
627      this is based directly on what the model compute, so that the content of
628      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
629    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
630    o clean up build options files for SunOS, in particular
631      - remove -traditional from xmakedepend
632      - change -xarch=v9 to -xarch=native for f77
633      - restore use of make (not gmake)
634      - add CC=gcc if using g77
635    o changes per discussion of AM, JMC, & EH3 today:
636      - move redundant "grid" variables out of "state" -- in preparation of
637        creating proper CF-style coordinate variables and in recognition
638        that any/all grid variables can be easily copied (eg. w/NCO) from
639        the grid files into any of the other NetCDF files
640      - *always* output grid variables with MDSIO (this will eventually be
641        changed)
642      - output MNC grid file if useMNC is true
643    o every instance of _END_MASTER() has been found and replaced with
644      _END_MASTER( myThid ) in order to satisfy certain picky Sun
645      preprocessors
646    o re-arrange diagnostics pkg initialisation:
647     - allow each package to extend the available diagnostics list
648     - add some checking and fix small problems (multi-threaded, ...)
649     - new S/R diagnostics_fill (replace fill_diagnostics):
650       look through the short list of active diag. (instead of the long list)
651       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
652    
653    checkpoint57a_post
654    o this set of changes restores TAMC compatibility
655      tested for global_ocean.90x40x15 adjoint on trough
656      (what a pain)
657    
658    checkpoint57a_pre
659    o some modifs in tools/build_options for sunos
660    o call ctrl_pack for ctrl at end for optimcycle=0
661    
662    checkpoint57
663    o add horizontal bi-harmonic viscosity for vertical velocity
664      - new parameter viscA4W (defaults to viscA4)
665      - affects only non-hydrostatic code
666      - to be done: no-slip lateral boundary conditions
667    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
668    o implement Implicit Vertical advection for pTracers
669    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
670      (implemented also for implicit vertical diffusion & advection)
671    o OBCS: extend application of tracer open boundary conditions
672      to a strip beyond the boundary of width Olx/Oly
673    o add call monitor to TAF set of required calls (flow directives)
674      and include in natl_box_adjoint
675    o untangle a few ifdefs related to cost, ctrl, autodiff
676      untangel a few ALLOW_ECCO_OPTIMIZATION
677    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
678      (theta2, salt2 in ecco_cost_weights)
679    
680    checkpoint56c_post
681    o OBCS as control variables
682      - update ctrl_ad_diff.list, obcs_ad_diff.list
683      - remove balance of obcs controls from default
684      - fix index bug nobcs in ctrl_init
685      - fix dummy fields filen in ctrl_pack
686      - add dummy weights for obcs
687    o lsopt: comment out fort.94 output
688    o optim:
689      - remove unnecessary header files
690      - adjusted namelists
691      - add xerbla.F to Makefile
692    o exf:
693      - multiple modifications of exf_check_range
694      - unit change in exf_init_runoff from [m/year] to [m/s]
695    o mdsio:
696      - i/o-vector change debugLevel from debLevA to debLevB
697    
698    checkpoint56b_post
699    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
700      is called from DO_THE_MODEL_IO
701      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
702      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
703      - clean up PTRACERS_WRITE_TIMEAVE a little
704    o add another verification experiment that tests both the cfc-pkg and
705      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
706      reactive tendencies treated inline with regular timestepping
707    o testreport previously did a lousy job of comparing small numbers, so
708      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
709      implemented in the little c-progam tmp_cmpnum.c which is embedded in
710      testreport.
711    o ptracers_monitor: bug fix for MPI
712    
713    checkpoint56a_post
714    o GCHEM: finish reorganizating the package
715      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
716        (introduces another 3D-array for each passive tracer, but only if
717        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
718        gchemTendency is not needed because the timestep is done separately)
719      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
720      - GCHEM is now---more or less cleanly---separate from PTRACERS
721      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
722        so clear to me how that should be done in a general way.
723    o CFC: improve formatting of output in CFC_ATMOS
724    o PTRACERS:
725      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
726        that ALL experiments with ptracers enable can be checked. This makes
727        GCHEM_MONITOR obsolete.
728      - include a runtime parameter PTRACERS_monitorFreq that defaults to
729        monitorFreq
730      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
731    o add PTRACERS (PTR0[1-5]) to testreport output
732    o exf_check_range:
733      * default changed to .TRUE.
734      * will check values for niter0 if debLevA, every timestep if debLevB
735      * STOP in exf_check_range if 'out of range'
736      * range chosen generous to allow for potential extema
737      TBD: a version with stricter range
738           permitted range would be runtime parameters
739    o GMredi:
740      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
741      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
742      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
743    o GCHEM:
744      - move call to GCHEM_FORCING_SEP, so that it is now called before
745        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
746      - introduced a useGCHEM runtime flag and applied it everywhere.
747      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
748        this flag is now only visible within GCHEM-pkg routines.
749      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
750        be replaced by a 3D array that is computed before thermodynamics; for
751        this, the tracer ID iTracer had to be included into the parameter list
752        of ptracers_forcing
753      - set up forward_step to call gchem_forcing, that will replace
754        gchem_forcing_int in ptracers_forcing
755      - cleaning up
756    o small cleaning of exch2: remove files that are also in eesupp/src
757    
758    checkpoint56
759    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
760    o mnc: cleanup "full" files--fixes out-of-memory problem
761    o ECCO-GODAE
762      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
763      * fully merged and updated from SIO code
764        windstress sign change affects
765        - exf_inscal_[u/v]stress
766        - sign of xx_tau[u/v] adjustments
767        - signs in cost_scat
768      * ctrl_get_gen: avoid update of tau[u/v] for first few days
769      * natl_box_adjoint updated and compressed
770      * 2-level checkpoint switch added
771        (tested in EXP. 1 of natl_box_adjoint)
772      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
773    o SVD
774      * first complete, non-hacked version for SVD calculations
775      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
776        performed via direct access files admtlm_vector.it????
777        (via ctrl_[un]pack)
778      * optimcycle is used for ARPACK iteration counter
779        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
780      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
781        and add linear transforms where necessary
782      * controls are initial/final SST, SSS (can be extended; need to check
783        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
784    o mdsio: filename info to both stderr, stdout
785    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
786      from sign change
787    
788    checkpoint55j_post
789    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
790      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
791    o add consistent build directories and .cvsignore files to verification
792    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
793    o make all subroutines 30 or less characters in length for certain older
794      compilers to work (a thorough search only turns up two routines in
795      pkg/ptracers)
796    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
797      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
798    
799    checkpoint55i_post
800    o change arrays for total vertical diffusivity (2.D if explicit,
801      3.D if implicit) ; each ptracer uses its own background value.
802    o added mnc/NetCDF output capability to ocn_compon_interf
803      - added bits to verification/cpl_aim+ocn so that it can run on
804        ITRDA and other clusters without the mpirun "-wd" option
805    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
806      configuration
807    o give MNC the ability to create additional files rather than
808      exceeding a specified file size limit "MNC_MAX_FILESIZE"
809      - the default is just less than 2GB which is a practical limit
810        on many systems
811    o Compute the non-local term using either KPP vertical diffusivity (=default)
812       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
813    
814    checkpoint55h_post
815    o add verification test "vermix"
816    o remove all the *_ioinc flags and replace with the single global
817      outputTypesInclusive flag
818    o allow to set a vertical profile of vertical diffusivity for T & S
819    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
820    o useMNC moved from data.mnc to data.pkg
821    
822    checkpoint55g_post
823    o Renaming carbon AD experiments to comply with testreport conventions
824    o Updating adjoint of Held-Suarez hs94.1x64x5
825    o Fixing directives for non-ECCO forward_step, after ECCO directives
826      have been fixed to avoid recomp. of do_oceanic_phys
827      Works well for global_ocean.90x40x15,
828      but recomp. issue remains for carbon
829    o Updating adjoint output for natl_box_adjoint after
830      pkg/ecco has been modified (see taga c55d_post)
831    
832    checkpoint55f_post
833    o rename to timeave_init_fixed
834    
835    checkpoint55e_post
836    o some delicate re-shuffle of store directives to avoid one
837      extra call of do_oceanic_physics
838      affects ecco_the_main_loop.F, do_oceanic_physics.F
839      checkpoint_lev1_directives.h
840    o NB: this may break global_ocean adjoint temporarily,
841      but it is clear how to fix it. Will do later, need this now.
842    
843    checkpoint55d_post
844    o ECCO specific cost function terms (up-to-date with 1x1 runs)
845    o ecco_cost_weights is modified to 1x1 runs
846    o modifs to allow observations to be read in as
847      single file or yearly files
848    o enable to read exf forcing fields as either
849      single file or yearly files (flag useExfYearlyFields)
850    checkpoint55d_pre
851    
852    o switch between 2-level and 3-level checkpointing
853    o add ability of MNC to write local and "partial" (eg. 2D slices where
854      the full 3D field is never actually stored) arrays to NetCDF files
855      with the correct (that is, the complete multi-dimensional) set of
856      array indicies
857      - used in mom_vecinv() to write the diagFreq output
858      - tested (demonstrated) in verification/aim.5l_cs
859    o further mnc-ification
860      - add verification/lab_sea to the list with mnc setups
861      - fix undefined mnc v-names in cd_code
862      - add kpp to mnc output (both snapshot and timeave)
863    o non-hydrostatic code
864      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
865        in calc_gw.F
866      - defaults to viscAh
867      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
868        friction or Leith) in non-hydrostatic mode, as long as there is
869        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
870    o pkg/cost
871      extend simple cost functions to treat time mean quantities
872      (T,U,V) via cost_accumulate_state from cost_tile
873    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
874        be 2 times larger than the minimum size the advection scheme requires.
875        now get a perfect conservation of salt in advect_cs test-exp (updated)
876    o GGL90 (Gaspar's TKE mixed layer)
877      - add horizontal diffusion of TKE, requires exchanges in
878        do_fields_blocking_exchanges, horizontal diffusivity is zero by
879        default. In OPA there is no horizontal diffusion of TKE but the
880        mixing coefficients are computed from a horizontal average of TKE of
881        6 points or so. I think that diffusion has a little more physical
882        justification.
883      - clean up ggl90_calc in the hope of reducing memory usage (this hope
884        was in vain)
885      - mask tke-variable in ggl90_init
886    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
887    o fix biharmonic diffusion on CS-grid.
888    o more obcs stuff
889      - added obcs_external_fields_load as an alternative to the EXF-pkg option
890        for reading boundary values. This routine is called from
891        obcs_prescribe_read
892      - updated obcs_check
893      - changed sponge layer relaxation parameter units for days to seconds
894      - turned off sponge layer by default
895      - changed argument list of OBCS_CALC to myTime+deltaTclock
896      - fixed about 35 bugs in obcs_external_fields_load
897    
898    checkpoint55c_post
899    o obcs stuff
900      - new runtime flags useOBCSprescribe, useOBCSbalance
901      - re-arranged obcs_calc
902      - moved exf_getobcs to obcs_prescibe_read
903        obcs_prescibe_read is called after ORLANSKI stuff
904        and independent of it (executable can contain all).
905      - updated obcs_check
906      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
907        These may be necessary only if tangential velocities are
908        prescribed at OB, not sure, needs testing.
909    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
910      which simplifies the calls and passes the ifc check-bounds test
911    
912    checkpoint55b_post
913    o add a 2D scalar, Z location, exchange_2 routine.
914    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
915      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
916      affects advect_cs results (for the wrong reason): update output.txt
917    o use a more standard discretization for biharmonic viscosity ;
918     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
919      affects results of dome set-up: update output.txt
920    o fix gad_advection.F (CubedSphere part), back to version 1.23
921    o fix bug in mom_vi_del2uv.F (CubedSphere part).
922    
923    checkpoint55a_post
924    o merged code to
925      * prescribe/read time-dependent open boundaries
926        (works in conjunction with exf, cal)
927      * sponge layer code for open boundaries
928      * each boundary N/S/E/W now has its own CPP option
929        (healthy for the adjoint)
930    
931    checkpoint55
932    o up-to-date adjoint of previous breaks
933      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
934      - global_ocean_ebm: adjoint still needs fix (TLM ok)
935      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
936      - carbon: * remove tr1-related adjoint verification
937                * add ptracer as control variable
938    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
939      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
940    
941    checkpoint54f_post
942    o in verification/carbin/ remove experiment related to
943      ALLOW_PASSIVE_TRACER (array tr1 etc)
944      code_ad/ input_ad/ results_ad
945    
946    o add two new packages
947      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
948        + subject to optimization (memory)
949      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
950        + subject to reordering (many GOTOs in the original code)
951        + so far opps is called for every (i,j) point, and then operates in
952          the vertical; one may want to reorder the scheme in order operate in
953          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
954          fields)
955    o overhaul of IO so that we now have flags for MDSIO and/or MNC
956      - all verification tests compile and run with linux_ia32_g77
957      - defaults are compatible with current input files--nothing
958        should change if you were not previously using MNC
959      - MNC output has been added in numerous places (eg. timeave)
960        but there are still a few writes not yet do-able with MNC
961        (this is in progress)
962      - flags now allow for either/or/both use of MDSIO and MNC and
963        documentation will soon follow
964      - numerous small formatting cleanups for ProTeX
965    o add version info (via BUILD_INFO.h) to MNC and stdout
966    
967    checkpoint54e_post
968    o add two new packages
969      - pp81 (Packanowski and Philander, 1981), Richardson number and
970        stratification dependent mixing
971      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
972      - these scheme operate in a similar manner as KPP (without ghat, of
973        course), however there is only one diffusivity that is used for both
974        temperature and salinity (and passive tracers)ç
975    o add offline package
976    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
977      provided by Stephanie Dutkiewicz
978    o genmake2: add ability to search for C compilers and cleanup test output
979      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
980    
981    checkpoint54d_post
982    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
983    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
984      leading to additional shift by 5 days each year of integration
985       (i.e. leading to considerable offset over the years)
986    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
987    o start with no AB and no initial filtering (staggerTimeStep):
988      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
989    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
990      (external loading & cpl import/export stay in forward_step.F)
991    o update coupling interface to work with new staggerTimeStep
992    o change MDSIO ptracers_pickup.
993    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
994    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
995    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
996    
997    checkpoint54c_post
998    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
999      this affects (truncation error) output.txt of test-exp:
1000       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1001    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1002    o change Qnet to always be the net heat flux, (+upward).
1003      affects (truncation error) output of natl_box exp.: updated
1004    o define the max number of passive tracers in PTRACERS_SIZE.h
1005    o start to test mnc routinely in exp0
1006    o add sea-ice loading (sIceLoad) as a new forcing field.
1007    
1008    checkpoint54b_post
1009    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1010       impressive on Altix and Opteron systems)
1011    o diagnostics can now write NetCDF files through the mnc package
1012    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1013    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1014    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1015      affects (truncation error) output of lab_sea & natl_box exp.: updated
1016    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1017    
1018    checkpoint54a_post
1019    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1020    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1021    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1022    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1023      + internal_wave (shift in writing cg2d_ini_res)
1024    checkpoint54a_pre
1025    
1026    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1027      - modified verification/lab_sea and natl_box_adjoint accordingly
1028    
1029    checkpoint54
1030    checkpoint53g_post
1031    o prepare splitting of thermodynamics: store convect.counter in common block
1032    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1033      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1034    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1035    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1036    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1037    o restore adjointability
1038    
1039    checkpoint53f_post
1040    o modifications that affect AIM experiment results (update output.txt):
1041      - no advection of S at top interface Nr (pkg/generic_advdiff)
1042      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1043    o AIM pkg:
1044      - include stability function into surf.Flux derivative relative to Tsurf
1045      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1046    
1047    checkpoint53e_post
1048    o merged cylindrical coord configuration
1049    o added rotating_tank experiment
1050    checkpoint53e_pre
1051    
1052    checkpoint53d_post
1053    o faulks upgraded: re-generate output.txt that have changed:
1054       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1055    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1056    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1057    o added Sadourny discretization of Coriolis
1058      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1059      - re-enabled use of omega3 (useAbsVorticity)
1060    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1061      vector-invariant equations
1062      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1063    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1064      hopefully without new bugs
1065      - still to do: biharmonic friction for non-hydrostatic w
1066    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1067    o regenerated output for global_ocean_ebm (using -ieee)
1068    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1069      of mom_common/
1070      - simple re-arrangement of instructions within computing loop
1071    checkpoint53d_pre
1072    
1073    checkpoint53c_post
1074    o new version of coupler for AIM+thSIce and Ocean models
1075     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1076     - land: change Evaporation of snow
1077     - aim with thSIce: fix bug in snow-precip.
1078    o changes to calc_gw.F
1079     - bug fix for w^2 term near the bottom boundary
1080     - (hopefully) improve the lateral slip boundary condtions for use with
1081        partial/looped cells
1082      - because the bug fix changes two verification experiments anyway (exp5
1083        and plume on slope), change the lateral boundary condition from half slip
1084        to the value of no_slip_sides
1085    o ebm package wasnt quite up to the parallel task. Fixed that.
1086    o Adjoint of EBM package + verification
1087      * TLM OK
1088      * ADM not sufficient accuracy yet (needs further testing)
1089    
1090    checkpoint53b_post
1091    o Commiting new energy balance model to repository
1092      * package is pkg/ebm
1093      * verif. is verification/global_ocean_ebm
1094      * references are in ebm_driver.F
1095    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1096    C        Global thermohaline circulation. Part I:
1097    C        Sensitivity to atmospheric moisture transport.
1098    C        J. Climate 12(1), 71-82
1099    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1100    C        Global thermohaline circulation. Part II:
1101    C        Sensitivity with interactive transport.
1102    C        J. Climate 12(1), 83-91
1103    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1104    C        Destabilization of the thermohaline circulation
1105    C        by atmospheric eddy transports.
1106    C        J. Climate 7(12), 1870-1882
1107    o Will need long integration testing.
1108    checkpoint53b_pre
1109    
1110    o created pkg/mom_common in preparation for variable viscosity code
1111    o renamed and split ini_mnc_io
1112    o pkg/land: only liquid water can diffuse or run-off
1113    o AIM using land: soil wetness availability account for snow
1114    o added printMapIncludesZeros to EEPARMS namelist
1115    
1116    checkpoint53a_post
1117    o restore TAMC compatiility for exf_constants.h
1118      (no usage of _d in .h)
1119    o Additional storing in KPP in an attempt to fix
1120      TAMC problem with adjoint of KPP code.
1121      (no success...)
1122      Identical code works fine with TAF.
1123    o Fixed verification/natl_box_adjoint experiments.
1124      Initial conditions for Experiments 4 and 5 are now
1125      set to "SEAICE_initialHEFF=0", which is more reasonable,
1126      and hence gives results closer to that of Experiment 2.
1127      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1128    
1129    checkpoint53
1130    o stable checkpoint with up to date adjoint
1131      TLM tests only run for 1st grdchk at the moment. Its unclear if
1132      this is a code problem or a problem with resetting code for g_
1133      variables that is being autogenerated wrong.
1134      Otherwise:
1135       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1136       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1137         are both still in chaos following their security messes.
1138    
1139    checkpoint52n_post
1140    o various build (mostly genmake2) changes including:
1141      - ability to build/run more easily within Cygwin and MacOS X
1142      - more complicated Makefiles with a stronger dependence on Gnu Make
1143    o pkg/seaice modifications
1144      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1145        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1146        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1147      - changed proxy for geostrophic velocity and updated
1148        verification/lab_sea/results/* accordingly
1149      - removed ADI dynamic solver from pkg/seaice
1150      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1151        they caused a segmentation fault under certain circumstances
1152      - removed unused field WATR
1153    o bug fix in exf-package:
1154      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1155         now reflect that.
1156    o small fixes in the cal-package:
1157      - set reference date to first of January for the 'model'-calendar
1158      - failing of cal_CheckDate in cal_FullDate now actually results in a
1159        warning
1160    o small modifications in exf-package to increase flexibility:
1161      - change climtempfreeze from a constant to a runtime parameter that
1162        is specified in data.exf_clim (default = -1.9)
1163      - introduce runtime parameter windstressmax (default = 2.0) that is
1164        specified in data.exf
1165    o fix in pkg/thsice:
1166      - update Evap (Tsf changes) to be consistent with Latent heat flux
1167      - maintain snow precipitation unchanged (even if Tsf >=0).
1168     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1169    
1170    checkpoint52m_post
1171    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1172      this does not change any of the results, because myIter=0 in swfrac always
1173      lead to jwtype=2 (the default anyway), but the call makes little sense
1174      as a default
1175    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1176    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1177      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1178    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1179    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1180    o extending useSingleCpuIO option to work with new exch2 I/O format
1181      - old-style, missing-tile I/O is still accessible by defining CPP
1182        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1183    o monitor package can write to NetCDF files and/or STDOUT
1184    o fix re-definition bug in MNC_GRID_INIT_ALL()
1185    o doc/api_reference added
1186      - a framework for building an API Reference Manual using all
1187        the "protex" comments embedded in the code
1188      - see pkg/generic_advdiff, pkg/mnc for examples
1189    o MNC:
1190      - make myThid the last argument for all subroutines
1191      - new default for the grid files: NO halos
1192      - add useMNC and other run-time flags
1193      - separate per-file-group handling of the unlimited dimension
1194      - early initialization of MNC w/ flags read at the eeboot stage
1195        and lookup tables set in initialize_fixed
1196      - write all MNC output to a freshly-created directory
1197    o thermodynamics sea-ice (thsice) is now tested with testreport.
1198    o test exp. advect_cs: use the standard cs32 grid ; update output.
1199    o Added functionality to grdchk:
1200      pick global i,j,k position (or nearest wet) where to perform check.
1201    
1202    checkpoint52l_post
1203    o new land formulation:
1204      a) use ground enthalpy as prognostic variable to ensure exact
1205         energy conservation.
1206      b) account for water temperature and for latent heat of freezing
1207         in all processes (rain, run-off, ground storage)
1208      c) compute surface and ground temperature implicitly.
1209    o aim_v23 modification for new land model:
1210      a) Treat separately land / ocean / sea-ice surface fluxes
1211         to allow implicit computation of land & sea-ice surface temp.
1212      b) add snow precipitation.
1213    checkpoint52l_pre
1214    
1215    o fix problem (when 1 tile is empty) in min/max monitor.
1216    o fix bug in timeAve (u,vZetatave in common block)
1217    o no restoring terms under ice for pkg/seaice
1218    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1219    o bug fix for pkg/seaice pickups
1220    o change MNC call locations and add coordinate attributes
1221    o mask vorticity at the corner ; affects global_ocean.cs output
1222    o fix ini_curvilinear_grid ; test CS experiments with mpi
1223    o aim.5l_cs: modify sea-ice fraction input file ; update output
1224    o exf: Adding simple range check routine for exf fields after read
1225    
1226    checkpoint52k_post
1227    o removed top-level directory "diags"
1228      - we migrated these functions to pkg/timeave a long time ago
1229    o fixed bug introduced in pkg/monitor
1230    o accuracy ctrlprec = 32 insuffient for gradient checks using
1231      averaged fields (I/O via cost_averages)
1232      -> use ctrl.h in active_file*.F to control I/O precision.
1233    o paramter list of CALL ADTHE_MAIN_LOOP
1234    o added initial do_the_model_io to ecco
1235    o set all ...Freq to zero after cost_final
1236      taveFreq, dumpFreq, pChkptFreq
1237    o MAIN and ECCO differentiability restored
1238    
1239    checkpoint52j_post
1240    o fix nchklev in tamc.h for global_ocean...
1241    o Bringing flow and store directives up-to-date
1242    o Really weird thing!
1243      call do_the_model_io from the_main_loop with parameters
1244      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1245      TAF places a faulty re-call of initialise_varia
1246      after cost_final call which should not be there!
1247    checkpoint52j_pre
1248    
1249    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1250      error messages
1251    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1252    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1253      debug output
1254    o modfied mdsio_writefield.F to handle non-global files under exch2
1255    o update AIM Cubed-Sphere exp (aim.5l_cs):
1256      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1257    o update AIM Equatorial Channel exp:
1258      use standard aim_v23 pkg and change the SST fields to be more realistic.
1259    o globalFile now works with exch2
1260    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1261      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1262    o limit timeave output for hi-res integrations
1263    
1264    checkpoint52i_post
1265    o removed CPP_EEOPTIONS.h from verification/*/code
1266    o updated the tiling for global_ocean_pressure
1267    checkpoint52i_pre
1268    
1269    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1270      the old pkg/aim).
1271    
1272    checkpoint52h_pre
1273    o shortened offending lines in exch2_send_rx?.template
1274    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1275    o genmake2: add build & execute test for NetCDF code
1276    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1277      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1278    o added useSingleCPUIO flag to monitor.F and mon_out.F
1279    o added temporary hack for sea-ice dynamics on the cube:
1280      metric terms are ignored and it is assumed that
1281      there is no sea-ice on cube faces 1, 2, 4, and 5.
1282    
1283    checkpoint52f_post
1284    o added exch2 cube routines to pkg/exch2
1285    o modified hs94.cs-32x32x5 to use it
1286    o added new grid files to hs94.cs-32x32x5
1287    checkpoint52f_pre
1288    
1289    checkpoint52e_post
1290    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1291      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1292    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1293      to work with implicit vertical advection and AB ;
1294    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1295    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1296     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1297    checkpoint52e_pre
1298    
1299    o fix bug in impldiff when Nr=1 or Nr=2.
1300    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1301    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1302    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1303      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1304    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1305    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1306    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1307    
1308    checkpoint52d_post
1309    o re-tiled many expts to allow comparison in multi-processor mode
1310      - updated output accordingly
1311      - changed hs94.128x64x5 to use intial T from file rather than use the
1312        random number generator
1313    o add infrastructure in model routines for fizhi and gridalt packages
1314    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1315    o changes to permit hi-res, cubed-sphere, configuration
1316      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1317      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1318      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1319        of surface winds for the cube
1320      (A verification experiment, based on global_ocean.cs32x15, but with
1321       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1322       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1323       complete with example surface forcing files and matlab scripts to look
1324       at the output and compare it with that of global_ocean.cs32x15.)
1325    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1326       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1327       to conform to the common rule.
1328    o check-in the first version of the coupler + interfaces for multi-components
1329       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1330       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1331       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1332       - ocean and atmos. share the same horizontal grid (no interpolation).
1333       - exchanges between component and coupler is done in forward_step
1334    o new verification experiment, cpl_aim+ocn:
1335       coupled ocean - AIM atmosphere on cs32 grid.
1336    
1337    checkpoint52d_pre
1338    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1339    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1340    
1341    checkpoint52c_post
1342    o Fixing OPTIONS files for use of exf:
1343      - ALLOW_ECCO not needed
1344      - ECCO_CPPOPTIONS.h should not be included from
1345        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1346        as has been the case in the past
1347      - All cal/exf related options are currently set in
1348        single header file. Should remain so until we
1349        agree on a consistent new policy.
1350    o Removed all CPP options for cal package.
1351      cal has no more CPP options.
1352    o modified STOREs in GAD_ADVECTION
1353    o corrected key comp. for passkey
1354    
1355    checkpoint52b_post
1356    o new version: "thsice" of thermodynamic sea-ice pkg:
1357     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1358     - modify fluxes but do not change theta directly;
1359     - light cleaning of bulk_force pkg (still needed with thsice).
1360     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1361       + output_thsice.txt to test thsice & bulk_force pkgs.
1362    o put back grid & coriolis monitor output.
1363    checkpoint52b_pre
1364    
1365    o call "do_the_model_io" at the beginning (=> dump initial state)
1366    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1367    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1368      (need info on NUMBER_OF_PTRACERS)
1369    o missing PTRACERS headers in some routines
1370    o default tamc.h in pkg/autodiff supposed to crash
1371      to ensure proper customization
1372    
1373    checkpoint52a_post
1374    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1375      - moved surfaceTendencyTice from pkg/seaice to main code
1376      - subroutine FREEZE_SURFACE now limits only surface temperature
1377        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1378        => new output.txt for global_ocean.cs32x15 & global_with_exf
1379      - keep the old version of FREEZE for backward compatibility;
1380        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1381      - corresponding modifs for TAF directives
1382    o added surface flux output variables to TIMEAVE_STATVARS
1383    o time-averaged output for pkg/ptracers
1384    o fix problem with ECCO-related divided adjoint
1385      snapshot file was missing some ad-variables,
1386      but no warning issued by TAF
1387    
1388    checkpoint52a_pre
1389    o some bug fixes for #undef REAL4_IS_SLOW
1390    
1391    checkpoint52 = ecco_c52_e35
1392    o after testing adjoints of checkpoint51u_post
1393    
1394    checkpoint51u_post
1395    o this is the post-merge tag of the ecco-branch
1396      (needs another clean checkout and re-testing)
1397    o various natl_box_adjoint configs and results
1398      but no input fields
1399    o obcs adjoint not yet merged!
1400    o adding ECCO global 1x1 and 2x2 degree configs
1401    o updated/extended some store directives for seaice
1402    o pkg/ecco now containes ecco-specific part of cost function
1403    o top level routines the_main_loop, forward_step
1404      supersede those in model/src/
1405      previous input data.cost now in data.ecco
1406      (new namelist ecco_cost_nml)
1407    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1408    
1409    checkpoint51t_post
1410    o this is the pre-merge tag of the ecco-branch
1411    
1412    checkpoint51s_post
1413    o cleanup: removed various obsolete #define-s
1414    o pkg/grdchk
1415      - renamed 'ph-grd 3' to 'grad-res'
1416      - merged from ecco-branch
1417        (remaining bug fixes for obcs gradient checks)
1418      - additional high-precision output for testreport
1419        (grep for 'precision_grdchk_result')
1420    
1421    checkpoint51r_post
1422    o cleaned up or removed CPP_OPTIONS.h files
1423    o updated results for some of the tests to reflect the new
1424      optfiles (-ieee: -O0 instead of -O3)
1425    
1426    checkpoint51q_post
1427    o cd_code:
1428      - moved cd_scheme.F -> cd_code_scheme.F
1429      - separate read_checkpoint from cd_code_ini_vars.F
1430      - separated cd_code part from write_checkpoint
1431      - updated AD_SOURCE, generated .flow
1432      - added CD_CODE_VARS.h to the_main_loop
1433      - Moving cd_code specific store dir.s to pkg/cd_code
1434    o ctrl package totally restructured
1435      - pack/unpack now optional and decoupled from
1436        xx_/adxx_ I/O
1437      - ctrl_pack/unpack cleaned
1438        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1439      - confined inclusion of AD_CONFIG.h to where necessary.
1440    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1441    
1442    checkpoint51p_post
1443    o create initial cd_code package
1444      - WARNING: the initialization of fields within packages
1445        is broken because INI_FIELDS (where READ_CHECKPOINT is
1446        called) is called *before* PACKAGES_INIT_VARIABLES.
1447        This seems to be backwards since
1448        1) its important to initially zero the entire field including
1449           the "halo" region
1450        2) zeroing needs to be done *before* reading pickup info
1451           and the pickup call might or might not happen in any
1452           particular run
1453      - this needs an overhaul for R2
1454    o cleanup verification/*/code/GMREDI_OPTIONS.h
1455    o cleanup testreport
1456    
1457    checkpoint51o_post
1458    o bringing AD-related verif's up to date with genmake2
1459      - carbon/
1460      - global_ocean.90x40x15/
1461      - hs.94.1x64x5/
1462      - (front_relax/ )
1463    o (more) consistent directory structure for AD-related verif.'s
1464    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1465    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1466    o bug fix in find_alpha.F for MDJWF:
1467      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1468        change rho -> rho-rhoConst
1469      - replace call find_rho to find_rhonum
1470    o initialisation of rFlx extended to full array (required by TAF)
1471      and shifted to thermodynamics
1472    o removed PTRACERS.h in ptracers routine
1473    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1474    o Correcting initialisations for fVerU, fVerV.
1475    o helping TAF to recognize dependency on kUp for
1476      fVerU, fVerV
1477    o Replacing delZ by delR in pkg/ctrl/
1478    checkpoint51o_pre
1479    
1480    o undid all of cp51 pending some cleanups and discussion
1481    o added the [#include "AD_CONFIG.h"] statement to all files that need
1482       it for adjoint/tl #defines
1483     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1484     o removed tools/genmake since it no longer works
1485    
1486    checkpoint51n_post
1487    o modifications to make FREEZE flux visible to pkg/kpp
1488      - moved surfaceTendencyTice from pkg/seaice to main code
1489      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1490      - subroutine FREEZE now limits only surface temperature
1491        (this means new output.txt for global_ocean.90x40x15,
1492         global_ocean.cs32x15, and global_with_exf)
1493    o added surface flux output variables to TIMEAVE_STATVARS
1494    
1495    checkpoint51n_pre
1496    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1497    o added [#include "AD_CONFIG.h"] to all files that use the following
1498      defines:
1499      - ALLOW_ADJOINT_RUN
1500      - ALLOW_TANGENTLINEAR_RUN
1501      - ALLOW_ECCO_OPTIMIZATION
1502    
1503    checkpoint51m_post
1504    o incorporating changes to get TAMC/TAF working in genmake2
1505      - added new TAMC/TAF targets to the Makefile
1506      - various cleanups related to package handling
1507      - these changes should have no impact on the forward model
1508    
1509    checkpoint51l_post
1510    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1511     - faster algorithm for cal_addtime.F
1512     - higher precision arithmetic, where needed
1513     - pkg/exf *startdate variables changed from calendar date to
1514       model integration time
1515    
1516    checkpoint51l_pre
1517    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1518    o enable to apply restoring on S & T only in a latitude band.
1519    o update output (external_forcing_surf modif. change truncation errors)
1520       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1521    
1522    checkpoint51k_post
1523    o change default to: useNHMTerms=.FALSE.
1524     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1525       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1526     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1527        exp1, ideal_2D_oce
1528     - change data file of oceanic exp (leave the results unchanged for now)
1529       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1530    o set gravitySign automatically according to the vertical coordinate used
1531      (and change sign: back to "logical" value: +1 when R increases downward)
1532    o added an include barrier to the default CPP_OPTIONS.h and
1533      removed the #include "PACKAGES_CONFIG.h" from it
1534    o fix a bug in mom_fluxform (from chk51j_post)
1535    
1536    checkpoint51j_post
1537    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1538    o adjusted some flow directives (dynamics, thermodynamics)
1539    o added cubed-sphere case to test cost function
1540    o heckpoint_lev?_directives.h now include
1541      pkg-specific directives, whenever those are enabled.
1542    o Moving pkg-specific flow directives to corresponding pkg
1543      Moving pkg-specific differentiation list to corresponding pkg
1544      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1545      ---> conventions are
1546           - pkg_ad.flow
1547           - pkg_ad_diff.list
1548           - pkg_ad_check_lev?_dir.h
1549    
1550    checkpoint51i_post
1551    o merge of the branch-genmake2
1552      - knowingly breaks the older genmake
1553      - automatic generation of all ALLOW_${PKG_NAME} defines
1554      - new testreport supersedes older testscript
1555    o large number of package inclusion and header cleanups
1556    checkpoint51i_pre
1557    
1558    o new output for adjoin of global ocean vector invariant
1559    o fix for checkpoint of thermodynamic seaice and bulk_force
1560    o Steph gchem various cleanups
1561    
1562    checkpoint 51h_pre
1563    o fixed some single quotes
1564    o modify gchem pkg to be more versatile
1565    o modifications to clean up dic pkg
1566    o add pkg/cfc
1567    
1568    checkpoint51g_post
1569    o provide links for ARPACK and ADM*TLM
1570    o start removing verification/vero/
1571    o update AD-related stuff
1572      (in particular some IF-statements in model/src/ routines)
1573    o adding to verification/global_ocean.90x40x15/ adjoint of
1574      vector invariant setup
1575    
1576    checkpoint51f_post
1577    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1578    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1579      of tracer Green's fucntions for ocean inversion project.
1580    
1581    checkpoint51f_pre
1582    o Added on-the-fly spatial interpolation capability
1583        "USE_EXF_INTERPOLATION" to pkg/exf.
1584      - This is a temporary Cartesian-grid hack until
1585        the super-duper ESMF coupler becomes available.
1586      - See verification/global_with_exf/README for usage example.
1587      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1588        flags and modified pkg/seaice accordingly.
1589    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1590        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1591        non-local transport term.
1592    
1593    checkpoint51e_post
1594    o pkg/mom_vecinv:
1595      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1596      - add time-ave diagnostic of vorticity advection.
1597    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1598    o atmospheric geopotential: - include water vapor effect;
1599                                - use p^kappa in p* scaling.
1600    o land pkg: read initial state from files.
1601    o AIM : add stratospheric drag in the upper level
1602    
1603    checkpoint51d_post
1604    o change function ILNBLNK (=> last non-blank char.) to return zero
1605      (instead of the string length) when the string. char is empty
1606    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1607    o modif's to restore TAMC compatibility
1608      - avoid "_d" constructs in PARAMETER declarations
1609      - avoid interrupting lines by comment lines
1610    o Use cluster local disks for purely local I/O
1611      vs. globally visible disks needed for ctrl stuff
1612      (merged from ecco-branch)
1613      - new active_file_loc... and mdsio_..._loc routines
1614      - affected packages: autodiff, ctrl, grdchk, mdsio
1615    
1616    checkpoint51c_post
1617    o introducing integer flag debugLevel
1618      - debLevZero: suppress all output
1619      - debLevA: standard
1620      - debLevB: equivalent to current debugMode=.TRUE.
1621    o introducing pathname variable mdsioLocalDir for mdsio
1622      that can be specified at runtime
1623      (relevant for cluster I/O to local disk)
1624    `
1625    >>>checkpoint51b_post
1626    adjoint of ptracers
1627    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1628    o extended state in checkpoint_lev?, etc.
1629    o alternative ctrl/cost with tr1 or ptracer
1630    o new comlev1_bibj_ptracers
1631    o new ptracers.flow
1632    o made ptracers_forcing same as external_forcing_s
1633    o added verification for adjoint with ptracers
1634      - adm. grdchk fail so far
1635      - tlm. grdchk OK
1636      - checked tapelev/comlev recomputations: OK
1637    <<<checkpoint51b_pre
1638    
1639    checkpoint51a_post
1640    o added code for biogeochemistry package
1641      - new pkgs: dic, gchem
1642      - new subroutine in ptracers
1643    o modify code for biogeo packages
1644      - in model/src and pkg/ptracers
1645    
1646    checkpoint51
1647    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1648      - autodiff, ctrl, exf, grdchk, seaice
1649      kept separate packages
1650      - cost, ecco, obcs
1651    o updating verification/internal_wave, verification/lab_sea
1652      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1653    
1654    checkpoint50i_post
1655    o Preparing next differentiable checkpoint and sync
1656      of MAIN vs. ecco-branch
1657      - 1st step: this one is differentiable
1658      - 2nd step: next(! not this) checkpoint will have updated packages
1659                  from ecco-branch)
1660    
1661    checkpoint50h_post
1662    o new package "land": provide surface BC for AIM.
1663    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1664    o AIM: use true log-P extrapolation for near surface temp (= as in
1665        F.Molteni paper) ; update aim.5l_cs output.
1666    o New variable in PARM03 for more flexible pickups
1667    o somewhat cleaned package initialisation sequence for
1668      ctrl/ cost/ ecco/ in packages_... routines
1669    
1670    checkpoint50g_post
1671    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1672      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1673      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1674        made the default because of faster convergence than ADI
1675    
1676    checkpoint50f_post
1677    o exf totally restructured
1678      - replaced all exf_set_ routines by one generic exf_set_gen.F
1679        and made sure it's still differentiable
1680      - split exf_getffields.F into new exf_bulkformulae.F
1681      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1682      - updated adjoint/makefile and relevant verif. accordingly
1683    
1684    checkpoint50f_pre
1685     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1686          + change Evap over land. (update aim.5l_cs output)
1687     o added missing .cvsignores and made uniform across expts
1688     o changed configuration of tidal_basin_2d expt
1689     o added pkg/debug functions for tracing code in fatal crashes
1690     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1691     o new fn in pkg/monitor to stop model if solution grows too big
1692     o removed lots of single quotes from comments
1693    
1694    checkpoint50e_post
1695    o make KPP work with PTRACERS
1696     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1697       nearly a copy of kpp_transport_s
1698     - there is no analogue to SurfaceTendencyS, so I have to use
1699       gPtr(of the surface layer) instead
1700    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1701    checkpoint50e_pre
1702    
1703    checkpoint50d_post
1704    o change kpp output from multiple-record state files to single-record state
1705      files analogous to write_state.F
1706    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1707      analogous to the cg2d-related output.
1708    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1709      so that writing to internal file fn (with length 512) fails.
1710    checkpoint50d_pre
1711    
1712    checkpoint50c_post
1713    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1714    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1715    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1716    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1717    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1718    
1719    checkpoint50c_pre
1720    Merging from release1_p13:
1721    o bug fix for pkg/seaice dynamic solver
1722    o Added SEAICE_initialHEFF to pkg/seaice
1723    
1724    checkpoint50b_post
1725    o store u*,v* in gU,V instead of in guNm1,gvNm1
1726    o in order to put the momForcing out of the Adams-Bashforth:
1727      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1728      to timestep.F
1729    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1730    o re-generate output for highly sensitive test-exp:
1731       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1732    
1733    checkpoint50b_pre
1734    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1735    o corrected CPP option mismatch in exf_Bulk... functions for case
1736      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1737    
1738    checkpoint50a_post
1739    o Bug fix for merging between c50 and KPP.
1740      ikey was passed from thermodynamics to kpp_calc via
1741      common block rather than being recomputed in kpp_calc,
1742      in contradiction with new key itdkey.
1743      New key ikppkey created, and tamc.h headers updated.
1744    
1745    checkpoint50
1746    - 2nd step of merge with ecco-branch:
1747      merge changes in ecco-branch back into main trunk
1748    - bug fix in find_alpha
1749    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1750    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1751    - merged some sliced AD support routines
1752    
1753    checkpoint49
1754    merged from ecco-branch:
1755    o exf:
1756      - Enable initialisation of forcing fields to constant
1757        (runtime) values.
1758      - in exf_getffields.F
1759        Reduce i-/j-loop to interior domain, discarding overlaps.
1760        That also fixes wrong TAF-key computations for key_1, key_2
1761        with bulf formulae.
1762      - exf_init.F modify #ifdef for exf_init_evap
1763      - exf_getffieldrec.F, ctrl_getrec.F
1764        The following INT-usages are not safe:
1765          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1766          fldcount = int(fldsecs/fldperiod) + 1
1767        and were modified.
1768    o autodiff: checkpoint_lev...
1769      - updated storing for bulk formulae (some arrays were missing)
1770      - added state for seaice package
1771      - synchronized with main branch
1772    o DIVA:
1773      Modif.s in
1774      - the_main_loop.F
1775      - the_model_main.F
1776      and added cost_final_restore.F cost_final_store.F
1777      o With these changes, it is possible to fully separate
1778        the first forward run to compute the cost function (mdthe_main_loop)
1779        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1780        into separate model executions.
1781        This enables better tuning of DIVA to given queue sizes.
1782      o Loss of cost function value in consecutive DIVA runs is
1783        fixed by storing to 'costfinal' file.
1784      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1785        beginning/end of adjoint integration is accounted for.
1786      The current changes apply to TAF-1.4.26.
1787      TAF has one remaining bug, requiring one manual change
1788      (see MITgcm manual).
1789    o cal: synchronized between MAIN and ecco-branch
1790    
1791    checkpoint48i_post
1792    o Changes to restore differentiability of code w.r.t. previous tag
1793      (mostly adding new routines to make list and replacing
1794      pressure by totPhiHyd).
1795    o Updated and merged grdchk package
1796      - has both ADM and TLM checks
1797      - works for single- and multi-proc.
1798      - output cleaned
1799      - worked successfully for parallel DIVA
1800    o genmake:
1801      - Adding -platform=SP4
1802      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1803    o Modif. for DIVA:
1804      ctrl_unpack should not be called in intermediate DIVA interval.
1805      (similar thing would apply for active files such as
1806      tbar, sbar, psbar, which should not be reinitialised;
1807      only relevant for ecco-branch)
1808    
1809    checkpoint48h_post
1810    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1811    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1812    o Added SEAICE_initialHEFF to pkg/seaice
1813    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1814    
1815    checkpoint48g_post
1816    --- EOS:
1817    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1818      store total Potential in totPhyHyd for diagnostics & EOS.
1819    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1820    --- Pressure/geopotential gradient:
1821    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1822    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1823      ( changes results of global_ocean_pressure )
1824    o NLFS + z-coord.: add eta*Rho' contribution.
1825    o accurate phiHyd when using interface-W at the middle between 2 centers
1826     ( changes results of ideal_2D_oce )
1827    o includes r* 2nd term in potential gradient.
1828    
1829    checkpoint48f_post
1830    Merging from release1_p12:
1831    o Modifications for using pkg/exf with pkg/seaice
1832      - improved description of the various forcing configurations
1833      - added basic radiation bulk formulae to pkg/exf
1834      - units/sign fix for evap computation in exf_getffields.F
1835      - updated verification/global_with_exf/results/output.txt
1836    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1837      (SBO) core products, including oceanic mass, center-of-mass,
1838      angular, and bottom pressure (see pkg/sbo/README.sbo).
1839    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1840      to avoid negative values in shallow regions.
1841      - updated verification/natl_box/results/output.txt
1842      - updated verification/lab_sea/results/output.txt
1843    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1844    o Added useSingleCpuIO option (see PARAMS.h).
1845    o Updated useSingleCpuIO option in mdsio_writefield.F to
1846      work with multi-field files, e.g., for single-file pickup.
1847    o pkg/seaice:
1848      - bug fix in growth.F: QNET for no shortwave case
1849      - added HeffFile for specifying initial sea-ice thickness
1850      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1851    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1852      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1853    o pkg/seaice:
1854      - adjoint-friendly modifications
1855      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1856    
1857    checkpoint48e_post
1858    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1859    o dynamics: change definition of computational domain & adapt mom_fluxform
1860      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1861    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1862        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1863        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1864        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1865        inverted_barometer solid-body.cs-32x32x1
1866      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1867    
1868    checkpoint48d_post
1869    o in preparation for r*:
1870     a) use pre-computed gradient of hydrostatic potential:
1871        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1872     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1873        => affects results of glob_oce_pressure (different truncation error)  
1874      update output.txt of ideal_2D_oce & global_ocean_pressure
1875    
1876    checkpoint48d_pre
1877    o in preparation for r*:
1878      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1879      pass the 2 comp. of the grad. as arguments to momentum S/R.
1880      but for the moment, only used if it does not change the results.
1881    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1882    
1883    checkpoint48c_post
1884    Modifications in treatment of initial flux forcing controls
1885    to avoid extra storing of flux fields.
1886    
1887    checkpoint48c_pre
1888    o Added tidal_basin_2d experiment (currently 1D!)
1889    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1890    
1891    checkpoint48b_post
1892    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1893     (modification to pressure gradient not yet implemented)
1894    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1895      (for U & V) that are used for vertical advection of momentum.
1896    
1897    checkpoint48a_post
1898    o In preparation for r*, use temp. array to compute vertical transport
1899       in flux-form momentum pkg. => change results of few test-exp.
1900      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1901                        lab_sea, natl_box & plume_on_slope
1902    
1903    checkpoint48
1904    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1905    
1906    checkpoint47j_post
1907    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1908    o moved adexch from forward_step to addummy_in_stepping
1909    o added exch in ctrl_map_...
1910    o aveFreq.=0. at end of cost_final to avoid overwrite in
1911      reverse checkpointing loop
1912    o Yet more changes in gmredi:
1913      * adgmredi_calc_tensor
1914        avoiding all recomputation of gmredi_slope_limit
1915      * adgmredi_x/y/rtransport
1916        added flag for excessive storing to avoid recomp. of
1917        u/v/rtans, dTdx/y/z
1918        -> this is not really necessary and very memory-consuming
1919      * adgmredi_slope_psi:
1920        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1921      * gmredi_slope_limit
1922        re-activated full calculation of taperfct for case 'ac02'
1923    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1924    
1925    checkpoint47i_post
1926    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1927    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1928      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1929    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1930    o gmredi: fix few bugs.
1931    
1932    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1933    This will be a good checkpoint to plug into the ecco-branch.
1934    o few modif.'s to get latest version adjointed
1935      (mainly kick out code in ini_linear_phisurf)
1936    o modif's to run adjoint with exactConserv
1937    o case GM_BOLUS_ADVEC should be cleaned
1938      S/R gmredi_slope_psi should be cleaned
1939    o verification/carbon now has exactConserv=.TRUE.
1940    
1941    checkpoint47g_post
1942    o time-average AIM output: becomes independent from statvars time-average
1943      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1944    o After TAF bug fix:
1945      Tested adjoint of gmredi package.
1946      Tests were done with checkpoint47 rather than with latest
1947      checkpoint47f_post since the latter is broken for the adjoint
1948      verification/carbon/ contains both ADM and TLM gradient checks.
1949    Here they are, before they get changed/lost/stolen.
1950    Mostly modif.'s to fix numerical sensitivities.
1951    Gradient checks OK for
1952    - GM_taper_scheme:
1953      * clipping
1954      * ac02
1955      * linear
1956      * glw91
1957      * dm95
1958      * ldd97
1959    - GMREDI_OPTIONS:
1960      * GM_VISBECK_VARIABLE_K
1961      * GM_NON_UNITY_DIAGONAL
1962      * GM_EXTRA_DIAGONAL
1963      * GM_BOLUS_ADVEC
1964    in conjunction with data.gmredi parameters to be checked in
1965    in a few minutes under verification/carbon/code/
1966    
1967    checkpoint47f_post
1968    Merging from release1_p10:
1969    o modifications for using pkg/exf with pkg/seaice
1970      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1971        and SEAICE_EXTERNAL_FLUXES
1972      - pkg/exf CPP options EXF_READ_EVAP and
1973        EXF_NO_BULK_COMPUTATIONS
1974      - usage examples are Experiments 8 and 9 in
1975        verification/lab_sea/README
1976      - verification/lab_sea default experiment now uses
1977        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1978    
1979    checkpoint47e_post
1980    o created a tag prior to creating a branch
1981    
1982    checkpoint47d_post
1983    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1984      at the bottom boundary had an erroneous half slip boundary condition
1985    o added bottom drag and no slip boundary condition capabilities to
1986      oceanic pressure coordinates code
1987    o added new verification experiment global_ocean_pressure, this experiment is
1988      also described in the tutorial section of the manual
1989    checkpoint47d_pre
1990    
1991    checkpoint47c_post
1992    o Added a verification experiment for a global cubed-sphere ocean run
1993      -  verification/global_ocean.cubed32x32x30
1994      -  uses pkg/therm_seaice and pkg/bulk_forcing
1995    
1996    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1997    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1998      when using P-coordinate; only implemented for atmospheric config.
1999    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2000      NOTES: requires option NONLIN_FRSURF to be "#define".
2001    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2002    
2003    checkpoint47b_post
2004    Merging from release1_p9:
2005    o pkg/seaice
2006      - removed GOTO's and added taf directives
2007      - double precision constants to reduce the g77 (Linux)
2008        to F77 (SGI) differences reported in release1_p8
2009    o tools/genmake
2010      - added SGI options
2011    o verification/testscript
2012      - updated to that of checkpoint47a_post
2013    o verification/global_ocean.90x40x15/input/eedata
2014      - modified for SGI f77 compatibility
2015    o verification/lab_sea
2016      - added description of sea-ice model
2017      - added missing matlab routines
2018      - added test of thermodynamics parallelization
2019    
2020    checkpoint47a_post
2021    o new pkg: aim_v23
2022     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2023       for now, keep the same surface forcing as before.
2024     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2025     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2026     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2027    o add diagnostic of surface correction term in monitor output
2028    
2029    o bulk_force and therm_seaice
2030    - Two packages:  bulk_force (Bulk forcing)
2031      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2032    - Earlier integration from Stephaine Dutkiewicz
2033      and Patrick Heimbach.
2034    - Two ifdef statements for compile time,
2035       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2036    
2037    checkpoint47
2038    differentiable version of checkpoint46n_post
2039    o bug fix in quasihydrostaticterms
2040    o * "clean" adjoint code (in terms of extensive recomputations)
2041        can now be obtained for all GMREDI options (i.e. for
2042        - GM_VISBECK_VARIABLE_K
2043        - GM_NON_UNITY_DIAGONAL
2044        - GM_EXTRA_DIAGONAL
2045        - GM_BOLUS_ADVEC )
2046      * However, wrong gradient check problem remains unsolved.
2047      * New CPP options have been introduced for different
2048        tapering schemes
2049    o external_fields_load now part of differentiation list
2050    o pressure needs multiple storing;
2051      would be nice to have store_pressure at beginning or
2052      end of forward_step, e.g. by having phiHyd global (5-dim.)
2053      (NB: pressure is needed for certain cases in find_rho,
2054      which is also invoked through convective_adjustment).
2055    o recomputations in find_rho for cases
2056     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2057    o #define ATMOSPHERIC_LOADING should be differentiable
2058    o ini_forcing shifted to begining of initialise_varia
2059    o Incorporating QNVS line search routines into MITgcm
2060      (this is separate code, and therefore not under pkg)
2061      lsopt/, optim/
2062    o Updated verification/carbon/
2063      - #define GM_VISBECK_VARIABLE_K
2064      - GM_taper_scheme    = 'ldd97'    
2065    
2066    checkpoint46n_post
2067    Merging from release1_p8:
2068    o verification/natl_box:
2069      updating new external_fields_load routine
2070    o New package: pkg/seaice
2071      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2072      The sea-ice code is based on Hibler (1979-1980).
2073      Two sea-ice dynamic solvers, ADI and LSR, are included.
2074      In addition to computing prognostic sea-ice variables and diagnosing
2075      the forcing/external data fields that drive the ocean model,
2076      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2077      The implied surface heat flux is then stored in variable
2078      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2079      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2080      non-local transport term.  Because this call precedes model
2081      thermodynamics, temperature under sea-ice may not be "exactly" at
2082      the freezing point by the time theta is dumped or time-averaged.
2083      N.B.: fairly large differences in accuracy occur across
2084            different platforms/compilers; comparison between
2085            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2086            generated output gives:
2087       T           S           U           V
2088      C D M    c        m  s        m  s        m  s        m  s
2089      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2090      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2091      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2092    
2093      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2094    o GAD:
2095      - generated new common blocks to account for call of
2096        same gad routines with differing traceridentities
2097        (needed to modify tracerIdentity indices in GAD.h)
2098      - generated separate common blocks for case useCubedSphereExchange
2099        (Department of Futurology)
2100      - parameter lists to gmredi_?transport: added tracerIdentity
2101      - added new key indices to tamc.h
2102    o external_fields_load:
2103      - added this routine to TAF list
2104      - needed to make some common blocks global and additional storing
2105        along the same lines as exf package (checkpoint_lev?_directives.h)
2106    o exf:
2107      updated external forcing package
2108      - bug fixes carried over from ecco-branch
2109        (missing OBCS_OPTIONS.h in two routines)
2110      - enable easy to use "no forcing".
2111      - added exf I/O for atmospheric loading
2112      - added exf I/O for runoff data
2113      - transfered scaling between exf <-> MITgcm to exf namelist
2114    o Adding new verification experiment global_with_exf.
2115      This verification experiment is almost identical to the
2116      global_ocean.90x40x15 experiment, except that it uses
2117      the exf (and cal) package instead of the
2118      external_fields_load routine (cf README file).
2119    
2120    checkpoint46m_post
2121    o modified testscript to return -- when there are no lines of "%MON" output
2122    o added new flag "quasiHydrostatic" for QH mode
2123      and new routine quasihydrostaticterms()
2124    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2125      New routine: mom_u_coriolis_nh()
2126    o fixed sign of non-hydrostatic metric terms in u and v equations.
2127      Depend on correct sign of gravitySign.
2128    o added work.pc* to .cvsignore in aim directories using ifc
2129    o introduced flag for controllin non-hydrostatic metric terms
2130    o removed gravitySign from PARM04
2131    o switched to g77/ifc from pgf77 in aim experiments
2132    
2133    checkpoint46l_post
2134    o made convective adjustment work with pressure coordinates:
2135     - changed the direction of k-loop in convective_adjustment.F for the
2136       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2137     - adjusted the reference pressure k-index in convective_adjustment.F
2138     - adjusted the convection condition in convect.F (in analogy to
2139       calc_ivdc.F)
2140     - convective_adjustment no longer computes anything on the halos
2141     - removed the warnings about negative salinity from find_rho.F and
2142       find_alpha.F; instead the new routine look_for_neg_salinity, called
2143       at the beginning of find_rho, find_alpha, and find_beta, does a
2144       check of the entire slice, if CPP-option
2145       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2146    checkpoint46l_pre
2147    
2148    checkpoint46k_post
2149    o fixed the verification/global_ocean.90x40x15 experiment:
2150     - new bathymetry (the world according to A., JMC, and M.)
2151     - new initial fields and forcing fields (*.bin files)
2152     - new POLY3.COEFFS (for the next release one should switch to a full
2153       equation of state: JMD95P or MDJWF)
2154     - fixed several errors and redundancies in the data file
2155     - experiment uses looped cells
2156     - added matlab directory with diagnostic scripts for plotting of output
2157    
2158    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2159     - read AIM physics parameters from a file (data.aimphys)
2160     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2161    
2162    checkpoint46j_post
2163    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2164    o move wVel computation at the end of the time step, in S/R integr_continuity
2165    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2166    o update timeave pkg for wVel diagnostic.
2167    checkpoint46j_pre
2168    
2169    checkpoint46i_post
2170    o Clean up AIM package (and keep the results unchanged):
2171      include CPP_OPTION and use IMPLICT NONE in all routines ;
2172      declare all the variables _RL ; use _d 0 for all numerical constants.
2173      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2174    
2175    checkpoint46h_post
2176    o cleaned up the use of rhoNil and rhoConst.
2177      - rhoNil should only appear in the LINEAR equation of state, everywhere
2178        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2179        and the dynamical equations are all divided by rhoConst
2180    o introduced new parameter rhoConstFresh, a reference density of fresh
2181      water, to remove the fresh water flux's dependence on rhoNil. The default
2182      value is 999.8 kg/m^3
2183    o cleanup up external_forcing.F and external_forcing_surf.F
2184      - can now be used by both OCEANIC and OCEANICP
2185    checkpoint46h_pre
2186    
2187     Added code to convert surface volume flux (fresh water) into
2188     a mass flux when using P coordinates in the ocean (OCEANICP).
2189     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2190    
2191    checkpoint46g_post
2192    o Include a new diagnostic variable phiHydLow for the ocean model
2193      - in z-coordinates, it is the bottom pressure anomaly
2194      - in p-coordinates, it is the sea surface elevation
2195      - in both cases, these variable have global drift, reflecting the mass
2196        drift in z-coordinates and the volume drift in p-coordinates
2197      - included time averaging for phiHydLow, be aware of the drift!
2198    o depth-dependent computation of Bo_surf for pressure coordinates
2199      in the ocean (buoyancyRelation='OCEANICP')
2200      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2201        Theta, Salinity, and Pressure in the parameter list. This routine is
2202        presently contained in find_rho.F. This routine does not give the
2203        correct density for 'POLY3', which would be a z-dependent reference
2204        density.
2205    o cleaned up find_rho
2206      - removed obsolete 'eqn' from the parameter list.
2207    o added two new verification experiments: gop and goz
2208      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2209    checkpoint46g_pre
2210    
2211    checkpoint46f_post
2212    o Enable tangent linear (forward mode) gradient checks:
2213      - extended active file handling to g_... files
2214      - added TANGENT_SIMULATION to theSimulationMode
2215      - extended grdchk package accordingly
2216    o added tangent linear setup in verification/carbon/code_ftl
2217    o added adjoint setup in verification/front_relax/code_ad
2218    
2219    checkpoint46e_post
2220    o Added new equation of state -> MDJWF
2221      - EOS of McDougall et al., 2002, JAOT, submitted
2222      - caveat: the equation of state is only valid for a smaller (more
2223        realistic?) range of values than JMD95P/Z and UNESCO
2224      - added masks to the calculation of pressure in store_pressure
2225      - added more check values for density in check_eos (ini_eos.F), some of
2226        the old check values are out of the range of the MDJWF-eos, so don't
2227        expect perfect matches for those
2228    checkpoint46e_pre
2229    
2230    checkpoint46d_post
2231    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2232      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2233      case of pressure coordinates. eosType='JMD95Z' in
2234      combination with buoyancyRelation='OCEANICP' now causes an error.
2235    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2236      in find_alpha/beta.
2237    checkpoint46d_pre
2238    
2239    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2240      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2241    
2242    checkpoint46c_post
2243    o Changes necessary for ocean in p-coordinates
2244     -  Added new buoyancy relation = 'OCEANICP'
2245     -  Added new parameters = gravitySign (this used to be contained inside
2246        the factor dRdZ which I added when we first switched to R coordinates).
2247     X GM/Redi is not compatible (yet)
2248     X bottom drag and no-slip need to be debugged.
2249    checkpoint46c_pre
2250    
2251    checkpoint46b_post
2252    o Added new equation of state -> JMD95Z and JMD95P
2253      - EOS of Jackett and McDougall, 1995, JAOT
2254      - moved all EOS parameters into EOS.h
2255      - new routines ini_eos.F, store_pressure.F
2256    o Added UNESCO EOS, but not recommended because it requires
2257      in-situ temperature (see JMD95)
2258    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2259      unesco.f to be used with POLY3
2260    checkpoint46b_pre
2261    
2262    checkpoint46a_post
2263    o Added (atmospheric) pressure loading
2264      - new field in FFIELDS.h, etc...
2265      - new cpp flag ATMOSPHERIC_LOADING
2266    o Changed hFacC to _hFacC in calc_phi_hyd.F
2267    o Added SHORTWAVE_HEATING to some files for consistency
2268    checkpoint46a_pre
2269    
2270    checkpoint46
2271    further merges from release1_p5
2272    o new ctrl package
2273      - adopted from ECCO environment to enable optimization
2274      - added Eliassen Palm fluxes to controls
2275    o added Eliassen Palm flux controls to gradient check package
2276    o cost package
2277      - Compatible with new ctrl package
2278      - added Eliassen Palm cost hooks
2279      - modif's of existing cost functions
2280    o Adjoint-related bug fixes in kpp:
2281      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2282      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2283    o autodiff package
2284      - flow directives:
2285        + new for S/R do_the_model_io
2286        + enhanced for S/R checkpoint
2287        + new gmredi.flow
2288      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2289        disable adcommon.h/g_common.h by default.
2290      - fixed problem for adjoint of global_max
2291    o modified verification/carbon/
2292    o New setup for adjoint of global_ocean
2293    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2294    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2295    o incorporated hooks for sponge layer code (external_forcing.F)
2296    
2297    checkpoint45d_post
2298    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2299    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2300      (affects plume_on_slope "cg2d" output)
2301    o add new parameter deltaTfreesurf for free-surface time stepping
2302    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2303    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2304    o change phiMin in exp1 (to agree with documentation)
2305    o add new flags:
2306     - T,S forcing inside/outside Adams-Bashforth
2307     - turn off temp,salt advection and/or forcing
2308     - for each tracer, define internal flag for multiDimAdvection & A-B
2309    o monitor: change definition of KE to check conservation of Energy
2310    
2311    checkpoint45c_post
2312    o Removed f90 comments ("!")
2313    o Modified initialisations to enable exf package for MITgcm
2314      (without invoking ECCO_PACKAGE).
2315    o modifications to gradient check package (Martin Losch)
2316      - enable centered differences
2317      - modified format of standard output
2318    
2319    checkpoint45b_post
2320    o cleaned exchange calls in cg2d
2321    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2322    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2323      to configure barotropic setup (Martin Losch)
2324    o moved some initialisations within bi,bj loop in dynamics
2325      (TAF flow dependency)
2326    o in initialise_varia, moved call packages_init_variables
2327      before convective_adjustment_init
2328      (corresponding adjustment of TAF tape initialisation).
2329    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2330    
2331    checkpoint45a_post
2332    o compute Rho over the whole domain (extend iMin,jMin indices)
2333    o specific exchange for X-slice domain (case Ny=1)
2334    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2335    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2336    
2337    checkpoint44h_post = checkpoint45
2338    o Fix to restore differentiability:
2339      place at which packages_init_variables is called in
2340      initialise_varia is crucial for reverse control flow.
2341    o modifications in GMRedi to enable stable adjoint
2342      (corresponding modif's in thermodynamics, dynamics)
2343    o added missing hook for sponge layer code in external_forcing
2344    o modified test cost functions
2345    o storing in gad_advection (plus removal of write(0,*)!
2346    o missing headers TR1.h added in convective_adjustment routines
2347    o errorMessageUnit set non-equal zero in eeboot
2348      (conflict on some platforms, e.g. IBM SP3)
2349    o modified carbon verif.
2350    
2351    checkpoint44h_pre
2352    o vertical grid option: allow to put the Interface at the middle between
2353      2 cell-centers ; replace delZ in pkg/kpp by drF.
2354    o GM Advective form: Tracers are advected using the residual transport (=
2355      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
2356    
2357    checkpoint44g_post
2358    o fix surface correction term in multiDimAdvection (affects plume_on_slope
2359      results) ; ifdef missing in thermodynamics.F
2360    
2361    checkpoint44f_pre,checkpoint44f_post
2362    o added PTRACERS package
2363      This allows an arbitrary number of passive tracers to be integrated
2364      forward simultaneously with the dynamicaly model.
2365      + Implemented so far:
2366        - basic forward algorithm (time-stepping, advection, diffusion, convection)
2367        - I/O and checkpointing
2368        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
2369      + Not implemented so far:
2370        - KPP
2371        - OBCS
2372      + No specific example supplied (yet) but global_ocean.90x40x15 has the
2373        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
2374        line in data.pkg.
2375      + This package is disabled by default since it increases storage.
2376    
2377    
2378    o testscript: added -cleanup option
2379    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
2380                 b) enable to filter 2D fields.
2381    
2382    checkpoint44e_pre,post
2383    o re-wrote convective adjustment to use pre-calculated weights
2384      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
2385      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
2386      Original calls to convect() still in place.
2387    
2388    chkpt44d_pre,post
2389    o added missing EXCLUDE_MONITOR flags
2390    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
2391      (incompatible typ in MIN/MAX expressions caused problems
2392      on IBM SP3)
2393    o in genmake added variable MAKEDEPEND
2394      plus resetting for case SunOS
2395    o added timer_stats.c routine for IBM SP3
2396    o removed variables in dynamics
2397    !!! I forgot to create tag chkpt44d_pre !!!
2398    !!! But chkpt44d_pre = chkpt44c_post    !!!
2399    
2400    o real fresh water flux implemented with non-linear free-surface.
2401    
2402    chkpt44c_pre,post
2403    o few fix (mask in shap_s2, EmPmR in external_field_load,
2404      USE_NATURAL_BCS in solve_for_P);
2405    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
2406    
2407    checkpoint44b_pre/_post
2408    o merge of relevant stuff from the ecco-branch:
2409      - genmake: removed $S64 overwrite for case SunOS
2410      - pkg/exf: update and corrections for field swapping and obcs
2411      - pkg/ecco: parameter lists for the_model_main, the_main_loop
2412                  harmonized between ECCO and MITgcm
2413      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
2414                      updated checkpointing_lev... lists for obcs
2415      - model/src: minor changes in forward_step, plot_field
2416                   added directive for divided adjoint in the_main_loop
2417      - pkg/mdsio: added mdsio_gl_slice
2418    
2419    o check parameters & config (chkpt44a_pre,post)
2420    o OBC and NonLin_FrSurf.
2421    
2422    checkpoint44
2423    o fix bug in mom_vi_del2uv
2424    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
2425    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
2426    o update AIM experiments (NCEP input files)
2427    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
2428    o added some stuff for AD
2429    
2430    checkpoint43
2431    o added two new advection tests
2432    o added global 4x4 degree ocean test
2433    o added test of H&S94 with free surface on cube
2434    o some final mods for gradient check, adjoint,...
2435    
2436    checkpoint42
2437      Fixed AD-related problems:
2438    o Store directives up-to-date with re-arranged Adams-Bashforth
2439      (mainly thermodynamics.F)
2440    o New store directives for multi-dim. advection schemes
2441      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
2442      * new common block and key passkey
2443      (mainly gad_advection.F)
2444    o Modified store directives for split of dynamics/thermodynamics
2445      for the case ALLOW_KPP
2446    o Cleaned argument list for timestep_tracer.F
2447    
2448    checkpoint41
2449    o re-formatted/added comments in prologues of key subroutines
2450      to work with protex
2451    
2452    checkpoint40
2453    o moved calc_gs, calc_gt and calc_tr1 back to model/src
2454    o added FLT (floats) package from Arne along with demo. experiment
2455    o re-arranged Adams-Bashforth scheme for tracers to allow easier
2456      implementation of forward-in-time forcing terms
2457    o more mods for non-linear free-surface including new variable
2458    o modified multi-dim method to work on cube
2459    o bug fix in KPP (from DM)
2460    
2461    checkpoint40pre9
2462    o added DST advection schemes
2463    o fix MPI bug on SGI's
2464    o modifications for non-linear free-surface
2465    o fixed conditionals for fixed flow/passive tracer only mode
2466    o added tension/strain form of stress tensor
2467    o changes to commenting of arguments for TAF/TAMC
2468    o added/updated many matlab scripts
2469    o added multi-dimensional advection method for tracers
2470      
2471    checkpoint40pre8
2472    o new package rw/
2473      Added method for dumping intermediate local arrays:
2474      mdsio_writetile - same as mdsio_writefield except works from inside
2475                        bi,bj loop
2476      mdsio_writelocal - same as mdsio_writetile except works for local
2477                         arrays
2478      write_local_r? - higher-level wrapper for mdsio_writelocal
2479      Controlled by diagFreq. Defaults to zero (ie. no dumps)
2480      Example given at end of mom_vecinv.F that dumps some local arrays.
2481    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
2482      control flux-form versus vector invariant code.
2483      Switch is runtime flag vectorInvariantMomentum (defaults to false)
2484      or genmake -DISABLE ...
2485    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
2486      (additional storing is now needed for case vecinv;
2487      currently nothing implemented to switch this storing off
2488      in case fluxform is used since no CPP flag available).
2489    
2490    checkpoint40pre7
2491    o bug fix in dynamics.F
2492      calc_viscosity called before k=1,Nr loop.
2493    o added some #ifdef's ALLOW_PASSIVE_TRACER
2494    o cleaned initialisations in ctrl_map_ini
2495      related to TAF
2496    
2497    checkpoint40pre6
2498    o split dynamics into thermodynamics & dynamics
2499    o corresponding split of calc_diffusivity into
2500      calc_diffusivity, calc_viscosity
2501      (kpp_calc_diff, kpp_calc_visc).
2502    o Added diffkr, kapgm to control variables
2503    o bug fix in gmredi_slope_limit for ldd97
2504    
2505    checkpoint40pre5
2506    o proper initialization of Adams-Bashforth time stepping
2507      + uses forward step for very first step of model (iter=0)
2508    o re-generated *all* output since almost all output is modified by this
2509      change (sorry but we've been putting this one off for about 2 years)
2510      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
2511        *not* regenerated since they are already out of date and I don't
2512        want to create the impression that they are suddenly working.
2513    o removed KAP stuff for DEC's
2514    o modified/added many .cvsignore files in */code and */input
2515    o added new expt "solid-body.cs-32x32x1"
2516      + this uses an alternative form of ini_curvilinear_grid.F which
2517        is not necessarily any better than the current one...
2518    
2519    checkpoint40pre4
2520    o added re-initialisations of utrans,vtrans,rtrans in
2521      calc_common_factors which are crucial for TAF.
2522    o extended iMin,jMin range for calc_common_factors,
2523      calc_diffusivity
2524    o added option ALLOW_PASSIVE_TRACER
2525    o a few minor updates and fixes
2526    
2527    checkpoint40pre3
2528    o created calc_gtr1.F for gad package
2529    o split the_main_loop and re-introduced forward_step
2530    o some recomputations of nIter0 for TAMC
2531    
2532    checkpoint40pre2
2533    o Updated to latest branch of AJA, JMC
2534    o Added gradient check package
2535    o Added routines for passive tracer handling
2536    o Added carbon sequestration sensitivity experiment
2537    
2538    checkpoint39
2539     o Modifications and fixes to support TAMC
2540       (mainly missing or wrong directives)
2541     o Corrected common blocks when fooling TAMC to produce adjoint I/O
2542       in addummy_in_stepping
2543     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
2544     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
2545     o Included following packages:
2546       cal: calendar
2547       exf: external forcing
2548       ecco: essential routines to control use of cal, exf
2549             (NB: this is not the full ECCO environment)
2550     o disabled some packages by default in genmake
2551    
2552    checkpoint38
2553     o see notes_c37_adj.txt
2554     o corrected wrong layer index in external_forcing_t
2555     o replaced the_main_loop/forward_step by the_main_loop
2556     o removed forceoutput from write_state
2557       (replaced criteria for initial/final state)
2558     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
2559    
2560    checkpoint37
2561     o mdsio.F routine split and packaged in pkg/mdsio
2562       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
2563        used unless genmake -disable=mdsio)
2564     o allow a more precise surface-geopotential gradient for the atmosphere
2565       taking into account the change in space of Alpha (=1/rho) at the surface.
2566     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
2567       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
2568     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
2569       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
2570       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
2571     o Time-Average diagnostics defined as a pseudo package "timeave".
2572     o pickup files : old pickup (before c35) did not work with new code (c35
2573       and after) unless activating 2 commented lines in initialise-varia.
2574     o Non-Hydrostatic pickup file Pb fixed.
2575     o bug with Rigid-lid version (since c35) fixed.  
2576    
2577    checkpoint36
2578     o implement Crank-Nickelson barotropic time-stepping
2579     o recover Time-Average diagnostics
2580     o fix Pb in checkpoint (PR#19)
2581     o AIM become a standard package ; clean unused CPP_kees
2582    
2583    checkpoint35
2584     o subtantial rewrite of dynamics.f
2585     o allows staggered time-stepping
2586     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
2587     o added bottom drag (linear + quadratic)
2588    
2589    checkpoint34
2590     o Modified exchange routines for correct reverse simulation.
2591     o Added verification output to comply with bug fix in impldiff.F
2592       as of c33 (exp2, natl_box).
2593     o Corrected store directives in dynamics.F
2594     o Corrected array boundaries in impldiff.F
2595     o Corrected array dimensions in gmredi.
2596       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
2597     o Added routine GLOBAL_SUM_INT to global_sum.F
2598     o Added mdsio_gl.F for ECCO purposes.
2599    
2600    checkpoint33
2601     o Fixed bug in lower BC in impldiff.F
2602     o Fixed confusion about units of forcing arrays in FFIELDS.h
2603       namely Fu,Fv,Qnet,Qsw,EmPmR:
2604       - Removed verification/natl_box/code/external_fields_scale.F
2605         (did not differ from that in model/src)
2606       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
2607         (see FFIELDS.h for description)
2608       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
2609         kpp_calc.F and kpp_transport_t.F
2610       - Removed model/src/external_fields_scale.F and calls to it
2611       - verification/natl_box uses flux data with "atmospheric" sign so
2612         a special version of external_fields_load.F is used to
2613         change the data as it's read in. This way, the arrays
2614         have the right units and signs at all times tha a user could
2615         possibly use them.
2616     o Corrected genmake to delete a temporary file during configuration
2617    
2618    checkpoint32
2619     o Scaling of forcing fields moved from external_forcing.F to
2620       external_fields_scale.F, called directly after loading fields.
2621     o Surface relaxation terms added to surface tendency fields in
2622       extra subroutine.
2623     o impldiff.F changed to avoid storing by TAMC of huge intermediate
2624       fields.
2625     o Changes in GMRedi to comply with packaging structure.
2626     o Modifications and bug fixes in KPP package.
2627     o Verification experiment for KPP added (verification/nat_box/)
2628    
2629    checkpoint31
2630     o Packages interface brought in line with defined standard
2631       -> new routines packages_...F
2632       -> changes in initialise_fixed.F, initialise_varia.F
2633       -> enables initialisation interface for ECCO package
2634     o Rescaling of external forcing fields immediately after read
2635       (removed from external_forcing.F)
2636       -> new: surface_fields_scale.F
2637       -> affects ini_foorcing.F, external_fields_load.F
2638     o Computation of surface tendencies before tendency updates.
2639       -> new: external_forcing_surf.F
2640     o Change of variable names useGMRedi, useKPP, useECCO
2641     o Further changes in dynamics.F, impldiff.F for TAMC
2642     o Tested for experiments 0, 2, 4.
2643       - not yet tested for GMRedi.
2644       - not yet tested for KPP.
2645    
2646    checkpoint30
2647     o Updates for OBCs
2648     o New experiment for test OBCs (internal_wave)
2649     o New output.txt in verification/exp4/results/
2650     o Updates for KPP: calculation of viscosity corrected, new variables
2651       kpp_dumpFreq and kpp_taveFreq
2652     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
2653       and entry for T90 in genmake
2654    
2655    checkpoint29
2656     o packaged KPP and GM/Redi
2657    
2658    checkpoint28
2659     o Corrected initialization of hFacMin for difference vertical coordinates
2660     o Modified calculation of partial cell thickness to more robust algorithm
2661     o config_summary.F: replaced write_1D_... by write_0D_...
2662       read_write.F: added subroutines write_0D_...
2663     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
2664       included some initialisations required for TAMC.
2665     o routine calc_isoslopes: modified sqrt computation to make it
2666       differentiable for zero argument.
2667     o routines dynamics, impldiff:
2668       included store directives and tape key computations required for TAMC.
2669     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
2670    
2671    checkpoint27
2672     o fixed calc_isoslopes() to so that cancellation of terms in tensor
2673       formulation works properly with variable resolution.
2674     o restructured the calling tree between the_model_main() and dynamics()
2675     o split initialise() into initialise_fixed() and initialise_varia()
2676     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
2677       in new routine ini_psurf()
2678    
2679    checkpoint26
2680     o moved some #ifdef in optional routines to encompass everything
2681       except the argument declarations. This was using up some memory.
2682     o fixed macros like _ADT to work with both versions of Linux cpp
2683     o cleaned up some unused and uninitialized variables
2684       (helps when debugging with strict compile options)
2685     o split up CPP_EEOPTIONS.h into options and macros
2686       (macros are now in eesupp/inc/CPP_EEMACROS.h)
2687     o patch for 2 processor JAM mode
2688    
2689    checkpoint25
2690     o updates for OBCs and NH
2691     o dramatically reduced memory usage
2692     o added "JAM" routines for use on Artic network
2693     o parameterization of convection by implicit vertical diffusion
2694     o added a diagnostic of convective index
2695     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
2696       (this is was partly for OBCs and NH but also in anticipation of
2697        an explicit free-surface option)
2698     o initial state input files for U and V
2699    
2700    checkpoint24
2701     o Removed some spurious "REAL"s
2702     o Updated KPP to latest version from JPL
2703     o Added a COS(latitude) in horizontal viscosity
2704    
2705    checkpoint23
2706     o Added del^4 diffusion for salt and temperature
2707     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
2708    
2709    checkpoint22
2710     o Made many small changes: implicit none, format(i5), etc...
2711     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
2712    
2713    checkpoint21
2714     o Introduced new I/O package that supports direct-access records (mdsio.F)
2715     o Split-up mid-level I/O routines
2716     o Updated input data for experiments 0,1,2,4 and 5
2717     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
2718    
2719    checkpoint20
2720     o Tidied up open-boundaries some more
2721     o Added non-hydrostatic code
2722     o Fixed some input data
2723     o Modified MPI start-up to work in "coupled" context.
2724    
2725    checkpoint19
2726     o Tidied up directory structure for verification experiments.
2727     o Added new code for open boundaries.
2728     o Corrected advective terms near boundaries.
2729     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
2730     o Implemented free-slip/no-slip BCs and del^4 dissipation.
2731     o Split default parameters out of ini_parms.F into set_defaults.F.
2732    
2733    checkpoint18
2734     o Further changes for optional code generation with
2735       CPP - ugh!
2736    
2737    checkpoint17
2738     o Beginning to incorporating modularity
2739       for supporting atmos. and ocean configs.
2740     o Small changes for TAMC complinace
2741     o New ultra simple test case. Barotropic box
2742       configuration "exp0".
2743    
2744    checkpoint16
2745     o Minor changes to exchange routines to support
2746       accumulation in reverse mode. Adjoint of an
2747       assignment is an addition.
2748     o Changes to support compilation by TAMC (LR(1)
2749       syntax) and by g77 under Linux ( 72 character
2750       limit ).
2751    
2752    checkpoint15
2753     Rewrote exchange routines to allow
2754     o General tile <-> tile connectivity.
2755     o TAMC reverse mode flag ( is this really needed? )
2756     o Variable width overlap and exchange region widths.
2757     o Hooks for sharing data via DMA, Arctic, Memory Channel,
2758       shmput/shmget, VIA, SYSV shmem and every other cool
2759       communication method.
2760    
2761    checkpoint14
2762     Consistent isomorphism chages made. These allow dynamical core
2763     to support both pressure and meters as a vertical coordinate.
2764    
2765    checkpoint13
2766     Release which corrects global_max problem and a couple
2767     of KGM time-averaging diagnostic errors. Also contains
2768     a double-gyre experiment setup as well as the baseline
2769     4 degree global template. The double gyre template is
2770     organised to allow it to be applied automatically to
2771     the baseline configuration.
2772    
2773    branch-point-rdot
2774     A few tidy-ups have been made bt the real point of this
2775     check-point (excuse the pun) is to allow a branch to be
2776     made for the purposes of adding the rDot alterations.
2777     I don't want to commit the rDot to the main-trunk until
2778     we've actually tested it...
2779    
2780    checkpoint12
2781     Tidy up and added generic genmake script (formerly
2782     configure script).
2783     Released to testers.
2784    
2785    checkpoint11
2786     Re-arranged initialise() and introduced ini_vertical_grid()
2787     and ini_masks_etc().
2788    
2789    checkpoint10
2790     Introduced the configure script.
2791     Separated out the diags package.
2792     Added template for writing time-averages of tile/intermediate quantities.
2793     Updated SIZE.h in exp2 and made the data big-endian.
2794    
2795  checkpoint9  checkpoint9
2796   MPI fix. Filename changes (meta/data). salbin*y stuff.   MPI fix. Filename changes (meta/data). salbin*y stuff.
2797   General tidy-up.   General tidy-up.

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