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revision 1.75 by jmc, Thu Jun 20 23:52:03 2002 UTC revision 1.363 by edhill, Thu Oct 7 19:31:14 2004 UTC
# Line 2  $Header$ Line 2  $Header$
2    
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    o further mnc-ification
7      - add verification/lab_sea to the list with mnc setups
8      - fix undefined mnc v-names in cd_code
9      - add kpp to mnc output (both snapshot and timeave)
10    o non-hydrostatic code
11      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
12        in calc_gw.F
13      - defaults to viscAh
14      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
15        friction or Leith) in non-hydrostatic mode, as long as there is
16        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
17    o pkg/cost
18      extend simple cost functions to treat time mean quantities
19      (T,U,V) via cost_accumulate_state from cost_tile
20    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
21        be 2 times larger than the minimum size the advection scheme requires.
22        now get a perfect conservation of salt in advect_cs test-exp (updated)
23    o GGL90 (Gaspar's TKE mixed layer)
24      - add horizontal diffusion of TKE, requires exchanges in
25        do_fields_blocking_exchanges, horizontal diffusivity is zero by
26        default. In OPA there is no horizontal diffusion of TKE but the
27        mixing coefficients are computed from a horizontal average of TKE of
28        6 points or so. I think that diffusion has a little more physical
29        justification.
30      - clean up ggl90_calc in the hope of reducing memory usage (this hope
31        was in vain)
32      - mask tke-variable in ggl90_init
33    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
34    o fix biharmonic diffusion on CS-grid.
35    o more obcs stuff
36      - added obcs_external_fields_load as an alternative to the EXF-pkg option
37        for reading boundary values. This routine is called from
38        obcs_prescribe_read
39      - updated obcs_check
40      - changed sponge layer relaxation parameter units for days to seconds
41      - turned off sponge layer by default
42      - changed argument list of OBCS_CALC to myTime+deltaTclock
43      - fixed about 35 bugs in obcs_external_fields_load
44    
45    checkpoint55c_post
46    o obcs stuff
47      - new runtime flags useOBCSprescribe, useOBCSbalance
48      - re-arranged obcs_calc
49      - moved exf_getobcs to obcs_prescibe_read
50        obcs_prescibe_read is called after ORLANSKI stuff
51        and independent of it (executable can contain all).
52      - updated obcs_check
53      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
54        These may be necessary only if tangential velocities are
55        prescribed at OB, not sure, needs testing.
56    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
57      which simplifies the calls and passes the ifc check-bounds test
58    
59    checkpoint55b_post
60    o add a 2D scalar, Z location, exchange_2 routine.
61    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
62      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
63      affects advect_cs results (for the wrong reason): update output.txt
64    o use a more standard discretization for biharmonic viscosity ;
65     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
66      affects results of dome set-up: update output.txt
67    o fix gad_advection.F (CubedSphere part), back to version 1.23
68    o fix bug in mom_vi_del2uv.F (CubedSphere part).
69    
70    checkpoint55a_post
71    o merged code to
72      * prescribe/read time-dependent open boundaries
73        (works in conjunction with exf, cal)
74      * sponge layer code for open boundaries
75      * each boundary N/S/E/W now has its own CPP option
76        (healthy for the adjoint)
77    
78    checkpoint55
79    o up-to-date adjoint of previous breaks
80      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
81      - global_ocean_ebm: adjoint still needs fix (TLM ok)
82      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
83      - carbon: * remove tr1-related adjoint verification
84                * add ptracer as control variable
85    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
86      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
87    
88    checkpoint54f_post
89    o in verification/carbin/ remove experiment related to
90      ALLOW_PASSIVE_TRACER (array tr1 etc)
91      code_ad/ input_ad/ results_ad
92    
93    o add two new packages
94      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
95        + subject to optimization (memory)
96      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
97        + subject to reordering (many GOTOs in the original code)
98        + so far opps is called for every (i,j) point, and then operates in
99          the vertical; one may want to reorder the scheme in order operate in
100          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
101          fields)
102    o overhaul of IO so that we now have flags for MDSIO and/or MNC
103      - all verification tests compile and run with linux_ia32_g77
104      - defaults are compatible with current input files--nothing
105        should change if you were not previously using MNC
106      - MNC output has been added in numerous places (eg. timeave)
107        but there are still a few writes not yet do-able with MNC
108        (this is in progress)
109      - flags now allow for either/or/both use of MDSIO and MNC and
110        documentation will soon follow
111      - numerous small formatting cleanups for ProTeX
112    o add version info (via BUILD_INFO.h) to MNC and stdout
113    
114    checkpoint54e_post
115    o add two new packages
116      - pp81 (Packanowski and Philander, 1981), Richardson number and
117        stratification dependent mixing
118      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
119      - these scheme operate in a similar manner as KPP (without ghat, of
120        course), however there is only one diffusivity that is used for both
121        temperature and salinity (and passive tracers)ç
122    o add offline package
123    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
124      provided by Stephanie Dutkiewicz
125    o genmake2: add ability to search for C compilers and cleanup test output
126      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
127    
128    checkpoint54d_post
129    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
130    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
131      leading to additional shift by 5 days each year of integration
132       (i.e. leading to considerable offset over the years)
133    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
134    o start with no AB and no initial filtering (staggerTimeStep):
135      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
136    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
137      (external loading & cpl import/export stay in forward_step.F)
138    o update coupling interface to work with new staggerTimeStep
139    o change MDSIO ptracers_pickup.
140    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
141    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
142    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
143    
144    checkpoint54c_post
145    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
146      this affects (truncation error) output.txt of test-exp:
147       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
148    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
149    o change Qnet to always be the net heat flux, (+upward).
150      affects (truncation error) output of natl_box exp.: updated
151    o define the max number of passive tracers in PTRACERS_SIZE.h
152    o start to test mnc routinely in exp0
153    o add sea-ice loading (sIceLoad) as a new forcing field.
154    
155    checkpoint54b_post
156    o add testreport "-j JOBS" option for parallel builds (tested and pretty
157       impressive on Altix and Opteron systems)
158    o diagnostics can now write NetCDF files through the mnc package
159    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
160    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
161    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
162      affects (truncation error) output of lab_sea & natl_box exp.: updated
163    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
164    
165    checkpoint54a_post
166    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
167    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
168    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
169    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
170      + internal_wave (shift in writing cg2d_ini_res)
171    checkpoint54a_pre
172    
173    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
174      - modified verification/lab_sea and natl_box_adjoint accordingly
175    
176    checkpoint54
177    checkpoint53g_post
178    o prepare splitting of thermodynamics: store convect.counter in common block
179    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
180      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
181    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
182    o new parameter "nShapS": allow to treat differently S from T (nShapT)
183    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
184    o restore adjointability
185    
186    checkpoint53f_post
187    o modifications that affect AIM experiment results (update output.txt):
188      - no advection of S at top interface Nr (pkg/generic_advdiff)
189      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
190    o AIM pkg:
191      - include stability function into surf.Flux derivative relative to Tsurf
192      - calculate clear-sky radiation & surface temp. change (for diagnostics)
193    
194    checkpoint53e_post
195    o merged cylindrical coord configuration
196    o added rotating_tank experiment
197    checkpoint53e_pre
198    
199    checkpoint53d_post
200    o faulks upgraded: re-generate output.txt that have changed:
201       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
202    o Added Bryan and Lewis, 1979, vertical diffusivity profile
203    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
204    o added Sadourny discretization of Coriolis
205      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
206      - re-enabled use of omega3 (useAbsVorticity)
207    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
208      vector-invariant equations
209      - note: does *NOT* yet use same variable visc. for no-slip BC's.
210    o recoded the lateral boundary conditions for non-hydrostatic w, this time
211      hopefully without new bugs
212      - still to do: biharmonic friction for non-hydrostatic w
213    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
214    o regenerated output for global_ocean_ebm (using -ieee)
215    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
216      of mom_common/
217      - simple re-arrangement of instructions within computing loop
218    checkpoint53d_pre
219    
220    checkpoint53c_post
221    o new version of coupler for AIM+thSIce and Ocean models
222     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
223     - land: change Evaporation of snow
224     - aim with thSIce: fix bug in snow-precip.
225    o changes to calc_gw.F
226     - bug fix for w^2 term near the bottom boundary
227     - (hopefully) improve the lateral slip boundary condtions for use with
228        partial/looped cells
229      - because the bug fix changes two verification experiments anyway (exp5
230        and plume on slope), change the lateral boundary condition from half slip
231        to the value of no_slip_sides
232    o ebm package wasnt quite up to the parallel task. Fixed that.
233    o Adjoint of EBM package + verification
234      * TLM OK
235      * ADM not sufficient accuracy yet (needs further testing)
236    
237    checkpoint53b_post
238    o Commiting new energy balance model to repository
239      * package is pkg/ebm
240      * verif. is verification/global_ocean_ebm
241      * references are in ebm_driver.F
242    C      * X. Wang, P. Stone and J. Marotzke, 1999:
243    C        Global thermohaline circulation. Part I:
244    C        Sensitivity to atmospheric moisture transport.
245    C        J. Climate 12(1), 71-82
246    C      * X. Wang, P. Stone and J. Marotzke, 1999:
247    C        Global thermohaline circulation. Part II:
248    C        Sensitivity with interactive transport.
249    C        J. Climate 12(1), 83-91
250    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
251    C        Destabilization of the thermohaline circulation
252    C        by atmospheric eddy transports.
253    C        J. Climate 7(12), 1870-1882
254    o Will need long integration testing.
255    checkpoint53b_pre
256    
257    o created pkg/mom_common in preparation for variable viscosity code
258    o renamed and split ini_mnc_io
259    o pkg/land: only liquid water can diffuse or run-off
260    o AIM using land: soil wetness availability account for snow
261    o added printMapIncludesZeros to EEPARMS namelist
262    
263    checkpoint53a_post
264    o restore TAMC compatiility for exf_constants.h
265      (no usage of _d in .h)
266    o Additional storing in KPP in an attempt to fix
267      TAMC problem with adjoint of KPP code.
268      (no success...)
269      Identical code works fine with TAF.
270    o Fixed verification/natl_box_adjoint experiments.
271      Initial conditions for Experiments 4 and 5 are now
272      set to "SEAICE_initialHEFF=0", which is more reasonable,
273      and hence gives results closer to that of Experiment 2.
274      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
275    
276    checkpoint53
277    o stable checkpoint with up to date adjoint
278      TLM tests only run for 1st grdchk at the moment. Its unclear if
279      this is a code problem or a problem with resetting code for g_
280      variables that is being autogenerated wrong.
281      Otherwise:
282       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
283       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
284         are both still in chaos following their security messes.
285    
286    checkpoint52n_post
287    o various build (mostly genmake2) changes including:
288      - ability to build/run more easily within Cygwin and MacOS X
289      - more complicated Makefiles with a stronger dependence on Gnu Make
290    o pkg/seaice modifications
291      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
292        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
293        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
294      - changed proxy for geostrophic velocity and updated
295        verification/lab_sea/results/* accordingly
296      - removed ADI dynamic solver from pkg/seaice
297      - replaced all occurrences of 1/CSTICE or 1/CSUICE
298        they caused a segmentation fault under certain circumstances
299      - removed unused field WATR
300    o bug fix in exf-package:
301      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
302         now reflect that.
303    o small fixes in the cal-package:
304      - set reference date to first of January for the 'model'-calendar
305      - failing of cal_CheckDate in cal_FullDate now actually results in a
306        warning
307    o small modifications in exf-package to increase flexibility:
308      - change climtempfreeze from a constant to a runtime parameter that
309        is specified in data.exf_clim (default = -1.9)
310      - introduce runtime parameter windstressmax (default = 2.0) that is
311        specified in data.exf
312    o fix in pkg/thsice:
313      - update Evap (Tsf changes) to be consistent with Latent heat flux
314      - maintain snow precipitation unchanged (even if Tsf >=0).
315     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
316    
317    checkpoint52m_post
318    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
319      this does not change any of the results, because myIter=0 in swfrac always
320      lead to jwtype=2 (the default anyway), but the call makes little sense
321      as a default
322    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
323    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
324      atmospheric model (AIM) to use it ; add a "slab ocean" component.
325    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
326    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
327    o extending useSingleCpuIO option to work with new exch2 I/O format
328      - old-style, missing-tile I/O is still accessible by defining CPP
329        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
330    o monitor package can write to NetCDF files and/or STDOUT
331    o fix re-definition bug in MNC_GRID_INIT_ALL()
332    o doc/api_reference added
333      - a framework for building an API Reference Manual using all
334        the "protex" comments embedded in the code
335      - see pkg/generic_advdiff, pkg/mnc for examples
336    o MNC:
337      - make myThid the last argument for all subroutines
338      - new default for the grid files: NO halos
339      - add useMNC and other run-time flags
340      - separate per-file-group handling of the unlimited dimension
341      - early initialization of MNC w/ flags read at the eeboot stage
342        and lookup tables set in initialize_fixed
343      - write all MNC output to a freshly-created directory
344    o thermodynamics sea-ice (thsice) is now tested with testreport.
345    o test exp. advect_cs: use the standard cs32 grid ; update output.
346    o Added functionality to grdchk:
347      pick global i,j,k position (or nearest wet) where to perform check.
348    
349    checkpoint52l_post
350    o new land formulation:
351      a) use ground enthalpy as prognostic variable to ensure exact
352         energy conservation.
353      b) account for water temperature and for latent heat of freezing
354         in all processes (rain, run-off, ground storage)
355      c) compute surface and ground temperature implicitly.
356    o aim_v23 modification for new land model:
357      a) Treat separately land / ocean / sea-ice surface fluxes
358         to allow implicit computation of land & sea-ice surface temp.
359      b) add snow precipitation.
360    checkpoint52l_pre
361    
362    o fix problem (when 1 tile is empty) in min/max monitor.
363    o fix bug in timeAve (u,vZetatave in common block)
364    o no restoring terms under ice for pkg/seaice
365    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
366    o bug fix for pkg/seaice pickups
367    o change MNC call locations and add coordinate attributes
368    o mask vorticity at the corner ; affects global_ocean.cs output
369    o fix ini_curvilinear_grid ; test CS experiments with mpi
370    o aim.5l_cs: modify sea-ice fraction input file ; update output
371    o exf: Adding simple range check routine for exf fields after read
372    
373    checkpoint52k_post
374    o removed top-level directory "diags"
375      - we migrated these functions to pkg/timeave a long time ago
376    o fixed bug introduced in pkg/monitor
377    o accuracy ctrlprec = 32 insuffient for gradient checks using
378      averaged fields (I/O via cost_averages)
379      -> use ctrl.h in active_file*.F to control I/O precision.
380    o paramter list of CALL ADTHE_MAIN_LOOP
381    o added initial do_the_model_io to ecco
382    o set all ...Freq to zero after cost_final
383      taveFreq, dumpFreq, pChkptFreq
384    o MAIN and ECCO differentiability restored
385    
386    checkpoint52j_post
387    o fix nchklev in tamc.h for global_ocean...
388    o Bringing flow and store directives up-to-date
389    o Really weird thing!
390      call do_the_model_io from the_main_loop with parameters
391      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
392      TAF places a faulty re-call of initialise_varia
393      after cost_final call which should not be there!
394    checkpoint52j_pre
395    
396    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
397      error messages
398    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
399    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
400      debug output
401    o modfied mdsio_writefield.F to handle non-global files under exch2
402    o update AIM Cubed-Sphere exp (aim.5l_cs):
403      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
404    o update AIM Equatorial Channel exp:
405      use standard aim_v23 pkg and change the SST fields to be more realistic.
406    o globalFile now works with exch2
407    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
408      mon_vort3.F to make exch2 friendly with >1 tile per cube face
409    o limit timeave output for hi-res integrations
410    
411    checkpoint52i_post
412    o removed CPP_EEOPTIONS.h from verification/*/code
413    o updated the tiling for global_ocean_pressure
414    checkpoint52i_pre
415    
416    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
417      the old pkg/aim).
418    
419    checkpoint52h_pre
420    o shortened offending lines in exch2_send_rx?.template
421    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
422    o genmake2: add build & execute test for NetCDF code
423    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
424      old grid files, moved CPP_EEMACROS.h to pkg/exch2
425    o added useSingleCPUIO flag to monitor.F and mon_out.F
426    o added temporary hack for sea-ice dynamics on the cube:
427      metric terms are ignored and it is assumed that
428      there is no sea-ice on cube faces 1, 2, 4, and 5.
429    
430    checkpoint52f_post
431    o added exch2 cube routines to pkg/exch2
432    o modified hs94.cs-32x32x5 to use it
433    o added new grid files to hs94.cs-32x32x5
434    checkpoint52f_pre
435    
436    checkpoint52e_post
437    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
438      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
439    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
440      to work with implicit vertical advection and AB ;
441    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
442    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
443     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
444    checkpoint52e_pre
445    
446    o fix bug in impldiff when Nr=1 or Nr=2.
447    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
448    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
449    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
450      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
451    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
452    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
453    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
454    
455    checkpoint52d_post
456    o re-tiled many expts to allow comparison in multi-processor mode
457      - updated output accordingly
458      - changed hs94.128x64x5 to use intial T from file rather than use the
459        random number generator
460    o add infrastructure in model routines for fizhi and gridalt packages
461    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
462    o changes to permit hi-res, cubed-sphere, configuration
463      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
464      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
465      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
466        of surface winds for the cube
467      (A verification experiment, based on global_ocean.cs32x15, but with
468       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
469       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
470       complete with example surface forcing files and matlab scripts to look
471       at the output and compare it with that of global_ocean.cs32x15.)
472    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
473       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
474       to conform to the common rule.
475    o check-in the first version of the coupler + interfaces for multi-components
476       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
477       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
478       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
479       - ocean and atmos. share the same horizontal grid (no interpolation).
480       - exchanges between component and coupler is done in forward_step
481    o new verification experiment, cpl_aim+ocn:
482       coupled ocean - AIM atmosphere on cs32 grid.
483    
484    checkpoint52d_pre
485    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
486    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
487    
488    checkpoint52c_post
489    o Fixing OPTIONS files for use of exf:
490      - ALLOW_ECCO not needed
491      - ECCO_CPPOPTIONS.h should not be included from
492        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
493        as has been the case in the past
494      - All cal/exf related options are currently set in
495        single header file. Should remain so until we
496        agree on a consistent new policy.
497    o Removed all CPP options for cal package.
498      cal has no more CPP options.
499    o modified STOREs in GAD_ADVECTION
500    o corrected key comp. for passkey
501    
502    checkpoint52b_post
503    o new version: "thsice" of thermodynamic sea-ice pkg:
504     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
505     - modify fluxes but do not change theta directly;
506     - light cleaning of bulk_force pkg (still needed with thsice).
507     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
508       + output_thsice.txt to test thsice & bulk_force pkgs.
509    o put back grid & coriolis monitor output.
510    checkpoint52b_pre
511    
512    o call "do_the_model_io" at the beginning (=> dump initial state)
513    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
514    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
515      (need info on NUMBER_OF_PTRACERS)
516    o missing PTRACERS headers in some routines
517    o default tamc.h in pkg/autodiff supposed to crash
518      to ensure proper customization
519    
520    checkpoint52a_post
521    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
522      - moved surfaceTendencyTice from pkg/seaice to main code
523      - subroutine FREEZE_SURFACE now limits only surface temperature
524        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
525        => new output.txt for global_ocean.cs32x15 & global_with_exf
526      - keep the old version of FREEZE for backward compatibility;
527        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
528      - corresponding modifs for TAF directives
529    o added surface flux output variables to TIMEAVE_STATVARS
530    o time-averaged output for pkg/ptracers
531    o fix problem with ECCO-related divided adjoint
532      snapshot file was missing some ad-variables,
533      but no warning issued by TAF
534    
535    checkpoint52a_pre
536    o some bug fixes for #undef REAL4_IS_SLOW
537    
538    checkpoint52 = ecco_c52_e35
539    o after testing adjoints of checkpoint51u_post
540    
541    checkpoint51u_post
542    o this is the post-merge tag of the ecco-branch
543      (needs another clean checkout and re-testing)
544    o various natl_box_adjoint configs and results
545      but no input fields
546    o obcs adjoint not yet merged!
547    o adding ECCO global 1x1 and 2x2 degree configs
548    o updated/extended some store directives for seaice
549    o pkg/ecco now containes ecco-specific part of cost function
550    o top level routines the_main_loop, forward_step
551      supersede those in model/src/
552      previous input data.cost now in data.ecco
553      (new namelist ecco_cost_nml)
554    o in ctrl/ cleaned some cross-dependencies and updated CPP options
555    
556    checkpoint51t_post
557    o this is the pre-merge tag of the ecco-branch
558    
559    checkpoint51s_post
560    o cleanup: removed various obsolete #define-s
561    o pkg/grdchk
562      - renamed 'ph-grd 3' to 'grad-res'
563      - merged from ecco-branch
564        (remaining bug fixes for obcs gradient checks)
565      - additional high-precision output for testreport
566        (grep for 'precision_grdchk_result')
567    
568    checkpoint51r_post
569    o cleaned up or removed CPP_OPTIONS.h files
570    o updated results for some of the tests to reflect the new
571      optfiles (-ieee: -O0 instead of -O3)
572    
573    checkpoint51q_post
574    o cd_code:
575      - moved cd_scheme.F -> cd_code_scheme.F
576      - separate read_checkpoint from cd_code_ini_vars.F
577      - separated cd_code part from write_checkpoint
578      - updated AD_SOURCE, generated .flow
579      - added CD_CODE_VARS.h to the_main_loop
580      - Moving cd_code specific store dir.s to pkg/cd_code
581    o ctrl package totally restructured
582      - pack/unpack now optional and decoupled from
583        xx_/adxx_ I/O
584      - ctrl_pack/unpack cleaned
585        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
586      - confined inclusion of AD_CONFIG.h to where necessary.
587    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
588    
589    checkpoint51p_post
590    o create initial cd_code package
591      - WARNING: the initialization of fields within packages
592        is broken because INI_FIELDS (where READ_CHECKPOINT is
593        called) is called *before* PACKAGES_INIT_VARIABLES.
594        This seems to be backwards since
595        1) its important to initially zero the entire field including
596           the "halo" region
597        2) zeroing needs to be done *before* reading pickup info
598           and the pickup call might or might not happen in any
599           particular run
600      - this needs an overhaul for R2
601    o cleanup verification/*/code/GMREDI_OPTIONS.h
602    o cleanup testreport
603    
604    checkpoint51o_post
605    o bringing AD-related verif's up to date with genmake2
606      - carbon/
607      - global_ocean.90x40x15/
608      - hs.94.1x64x5/
609      - (front_relax/ )
610    o (more) consistent directory structure for AD-related verif.'s
611    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
612    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
613    o bug fix in find_alpha.F for MDJWF:
614      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
615        change rho -> rho-rhoConst
616      - replace call find_rho to find_rhonum
617    o initialisation of rFlx extended to full array (required by TAF)
618      and shifted to thermodynamics
619    o removed PTRACERS.h in ptracers routine
620    o added surfacetendencyPtr to S/R parameter list pracers_forcing
621    o Correcting initialisations for fVerU, fVerV.
622    o helping TAF to recognize dependency on kUp for
623      fVerU, fVerV
624    o Replacing delZ by delR in pkg/ctrl/
625    checkpoint51o_pre
626    
627    o undid all of cp51 pending some cleanups and discussion
628    o added the [#include "AD_CONFIG.h"] statement to all files that need
629       it for adjoint/tl #defines
630     o re-worked the build logic in genmake2 to support AD_CONFIG.h
631     o removed tools/genmake since it no longer works
632    
633    checkpoint51n_post
634    o modifications to make FREEZE flux visible to pkg/kpp
635      - moved surfaceTendencyTice from pkg/seaice to main code
636      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
637      - subroutine FREEZE now limits only surface temperature
638        (this means new output.txt for global_ocean.90x40x15,
639         global_ocean.cs32x15, and global_with_exf)
640    o added surface flux output variables to TIMEAVE_STATVARS
641    
642    checkpoint51n_pre
643    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
644    o added [#include "AD_CONFIG.h"] to all files that use the following
645      defines:
646      - ALLOW_ADJOINT_RUN
647      - ALLOW_TANGENTLINEAR_RUN
648      - ALLOW_ECCO_OPTIMIZATION
649    
650    checkpoint51m_post
651    o incorporating changes to get TAMC/TAF working in genmake2
652      - added new TAMC/TAF targets to the Makefile
653      - various cleanups related to package handling
654      - these changes should have no impact on the forward model
655    
656    checkpoint51l_post
657    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
658     - faster algorithm for cal_addtime.F
659     - higher precision arithmetic, where needed
660     - pkg/exf *startdate variables changed from calendar date to
661       model integration time
662    
663    checkpoint51l_pre
664    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
665    o enable to apply restoring on S & T only in a latitude band.
666    o update output (external_forcing_surf modif. change truncation errors)
667       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
668    
669    checkpoint51k_post
670    o change default to: useNHMTerms=.FALSE.
671     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
672       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
673     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
674        exp1, ideal_2D_oce
675     - change data file of oceanic exp (leave the results unchanged for now)
676       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
677    o set gravitySign automatically according to the vertical coordinate used
678      (and change sign: back to "logical" value: +1 when R increases downward)
679    o added an include barrier to the default CPP_OPTIONS.h and
680      removed the #include "PACKAGES_CONFIG.h" from it
681    o fix a bug in mom_fluxform (from chk51j_post)
682    
683    checkpoint51j_post
684    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
685    o adjusted some flow directives (dynamics, thermodynamics)
686    o added cubed-sphere case to test cost function
687    o heckpoint_lev?_directives.h now include
688      pkg-specific directives, whenever those are enabled.
689    o Moving pkg-specific flow directives to corresponding pkg
690      Moving pkg-specific differentiation list to corresponding pkg
691      Moving pkg-specific checkpoint-lev storing to corresponding pkg
692      ---> conventions are
693           - pkg_ad.flow
694           - pkg_ad_diff.list
695           - pkg_ad_check_lev?_dir.h
696    
697    checkpoint51i_post
698    o merge of the branch-genmake2
699      - knowingly breaks the older genmake
700      - automatic generation of all ALLOW_${PKG_NAME} defines
701      - new testreport supersedes older testscript
702    o large number of package inclusion and header cleanups
703    checkpoint51i_pre
704    
705    o new output for adjoin of global ocean vector invariant
706    o fix for checkpoint of thermodynamic seaice and bulk_force
707    o Steph gchem various cleanups
708    
709    checkpoint 51h_pre
710    o fixed some single quotes
711    o modify gchem pkg to be more versatile
712    o modifications to clean up dic pkg
713    o add pkg/cfc
714    
715    checkpoint51g_post
716    o provide links for ARPACK and ADM*TLM
717    o start removing verification/vero/
718    o update AD-related stuff
719      (in particular some IF-statements in model/src/ routines)
720    o adding to verification/global_ocean.90x40x15/ adjoint of
721      vector invariant setup
722    
723    checkpoint51f_post
724    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
725    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
726      of tracer Green's fucntions for ocean inversion project.
727    
728    checkpoint51f_pre
729    o Added on-the-fly spatial interpolation capability
730        "USE_EXF_INTERPOLATION" to pkg/exf.
731      - This is a temporary Cartesian-grid hack until
732        the super-duper ESMF coupler becomes available.
733      - See verification/global_with_exf/README for usage example.
734      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
735        flags and modified pkg/seaice accordingly.
736    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
737        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
738        non-local transport term.
739    
740    checkpoint51e_post
741    o pkg/mom_vecinv:
742      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
743      - add time-ave diagnostic of vorticity advection.
744    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
745    o atmospheric geopotential: - include water vapor effect;
746                                - use p^kappa in p* scaling.
747    o land pkg: read initial state from files.
748    o AIM : add stratospheric drag in the upper level
749    
750    checkpoint51d_post
751    o change function ILNBLNK (=> last non-blank char.) to return zero
752      (instead of the string length) when the string. char is empty
753    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
754    o modif's to restore TAMC compatibility
755      - avoid "_d" constructs in PARAMETER declarations
756      - avoid interrupting lines by comment lines
757    o Use cluster local disks for purely local I/O
758      vs. globally visible disks needed for ctrl stuff
759      (merged from ecco-branch)
760      - new active_file_loc... and mdsio_..._loc routines
761      - affected packages: autodiff, ctrl, grdchk, mdsio
762    
763    checkpoint51c_post
764    o introducing integer flag debugLevel
765      - debLevZero: suppress all output
766      - debLevA: standard
767      - debLevB: equivalent to current debugMode=.TRUE.
768    o introducing pathname variable mdsioLocalDir for mdsio
769      that can be specified at runtime
770      (relevant for cluster I/O to local disk)
771    `
772    >>>checkpoint51b_post
773    adjoint of ptracers
774    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
775    o extended state in checkpoint_lev?, etc.
776    o alternative ctrl/cost with tr1 or ptracer
777    o new comlev1_bibj_ptracers
778    o new ptracers.flow
779    o made ptracers_forcing same as external_forcing_s
780    o added verification for adjoint with ptracers
781      - adm. grdchk fail so far
782      - tlm. grdchk OK
783      - checked tapelev/comlev recomputations: OK
784    <<<checkpoint51b_pre
785    
786    checkpoint51a_post
787    o added code for biogeochemistry package
788      - new pkgs: dic, gchem
789      - new subroutine in ptracers
790    o modify code for biogeo packages
791      - in model/src and pkg/ptracers
792    
793    checkpoint51
794    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
795      - autodiff, ctrl, exf, grdchk, seaice
796      kept separate packages
797      - cost, ecco, obcs
798    o updating verification/internal_wave, verification/lab_sea
799      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
800    
801    checkpoint50i_post
802    o Preparing next differentiable checkpoint and sync
803      of MAIN vs. ecco-branch
804      - 1st step: this one is differentiable
805      - 2nd step: next(! not this) checkpoint will have updated packages
806                  from ecco-branch)
807    
808    checkpoint50h_post
809    o new package "land": provide surface BC for AIM.
810    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
811    o AIM: use true log-P extrapolation for near surface temp (= as in
812        F.Molteni paper) ; update aim.5l_cs output.
813    o New variable in PARM03 for more flexible pickups
814    o somewhat cleaned package initialisation sequence for
815      ctrl/ cost/ ecco/ in packages_... routines
816    
817    checkpoint50g_post
818    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
819      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
820      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
821        made the default because of faster convergence than ADI
822    
823    checkpoint50f_post
824    o exf totally restructured
825      - replaced all exf_set_ routines by one generic exf_set_gen.F
826        and made sure it's still differentiable
827      - split exf_getffields.F into new exf_bulkformulae.F
828      - exf_inscal_/exf_outscal_ suffixes consistent with field names
829      - updated adjoint/makefile and relevant verif. accordingly
830    
831    checkpoint50f_pre
832     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
833          + change Evap over land. (update aim.5l_cs output)
834     o added missing .cvsignores and made uniform across expts
835     o changed configuration of tidal_basin_2d expt
836     o added pkg/debug functions for tracing code in fatal crashes
837     o tidied pkg/monitor to use MONITOR_OPTIONS.h
838     o new fn in pkg/monitor to stop model if solution grows too big
839     o removed lots of single quotes from comments
840    
841    checkpoint50e_post
842    o make KPP work with PTRACERS
843     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
844       nearly a copy of kpp_transport_s
845     - there is no analogue to SurfaceTendencyS, so I have to use
846       gPtr(of the surface layer) instead
847    o add a new platform SunFire+mpi (SunFire 15000) to genmake
848    checkpoint50e_pre
849    
850    checkpoint50d_post
851    o change kpp output from multiple-record state files to single-record state
852      files analogous to write_state.F
853    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
854      analogous to the cg2d-related output.
855    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
856      so that writing to internal file fn (with length 512) fails.
857    checkpoint50d_pre
858    
859    checkpoint50c_post
860    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
861    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
862    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
863    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
864    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
865    
866    checkpoint50c_pre
867    Merging from release1_p13:
868    o bug fix for pkg/seaice dynamic solver
869    o Added SEAICE_initialHEFF to pkg/seaice
870    
871    checkpoint50b_post
872    o store u*,v* in gU,V instead of in guNm1,gvNm1
873    o in order to put the momForcing out of the Adams-Bashforth:
874      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
875      to timestep.F
876    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
877    o re-generate output for highly sensitive test-exp:
878       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
879    
880    checkpoint50b_pre
881    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
882    o corrected CPP option mismatch in exf_Bulk... functions for case
883      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
884    
885    checkpoint50a_post
886    o Bug fix for merging between c50 and KPP.
887      ikey was passed from thermodynamics to kpp_calc via
888      common block rather than being recomputed in kpp_calc,
889      in contradiction with new key itdkey.
890      New key ikppkey created, and tamc.h headers updated.
891    
892    checkpoint50
893    - 2nd step of merge with ecco-branch:
894      merge changes in ecco-branch back into main trunk
895    - bug fix in find_alpha
896    - more storing in gmredi_calc_tensor.F, kpp_routines.F
897    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
898    - merged some sliced AD support routines
899    
900    checkpoint49
901    merged from ecco-branch:
902    o exf:
903      - Enable initialisation of forcing fields to constant
904        (runtime) values.
905      - in exf_getffields.F
906        Reduce i-/j-loop to interior domain, discarding overlaps.
907        That also fixes wrong TAF-key computations for key_1, key_2
908        with bulf formulae.
909      - exf_init.F modify #ifdef for exf_init_evap
910      - exf_getffieldrec.F, ctrl_getrec.F
911        The following INT-usages are not safe:
912          fldsecs  = int(fldsecs/fldperiod)*fldperiod
913          fldcount = int(fldsecs/fldperiod) + 1
914        and were modified.
915    o autodiff: checkpoint_lev...
916      - updated storing for bulk formulae (some arrays were missing)
917      - added state for seaice package
918      - synchronized with main branch
919    o DIVA:
920      Modif.s in
921      - the_main_loop.F
922      - the_model_main.F
923      and added cost_final_restore.F cost_final_store.F
924      o With these changes, it is possible to fully separate
925        the first forward run to compute the cost function (mdthe_main_loop)
926        and adjoint runs over individual DIVA intervals (adthe_main_loop)
927        into separate model executions.
928        This enables better tuning of DIVA to given queue sizes.
929      o Loss of cost function value in consecutive DIVA runs is
930        fixed by storing to 'costfinal' file.
931      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
932        beginning/end of adjoint integration is accounted for.
933      The current changes apply to TAF-1.4.26.
934      TAF has one remaining bug, requiring one manual change
935      (see MITgcm manual).
936    o cal: synchronized between MAIN and ecco-branch
937    
938    checkpoint48i_post
939    o Changes to restore differentiability of code w.r.t. previous tag
940      (mostly adding new routines to make list and replacing
941      pressure by totPhiHyd).
942    o Updated and merged grdchk package
943      - has both ADM and TLM checks
944      - works for single- and multi-proc.
945      - output cleaned
946      - worked successfully for parallel DIVA
947    o genmake:
948      - Adding -platform=SP4
949      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
950    o Modif. for DIVA:
951      ctrl_unpack should not be called in intermediate DIVA interval.
952      (similar thing would apply for active files such as
953      tbar, sbar, psbar, which should not be reinitialised;
954      only relevant for ecco-branch)
955    
956    checkpoint48h_post
957    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
958    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
959    o Added SEAICE_initialHEFF to pkg/seaice
960    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
961    
962    checkpoint48g_post
963    --- EOS:
964    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
965      store total Potential in totPhyHyd for diagnostics & EOS.
966    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
967    --- Pressure/geopotential gradient:
968    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
969    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
970      ( changes results of global_ocean_pressure )
971    o NLFS + z-coord.: add eta*Rho' contribution.
972    o accurate phiHyd when using interface-W at the middle between 2 centers
973     ( changes results of ideal_2D_oce )
974    o includes r* 2nd term in potential gradient.
975    
976    checkpoint48f_post
977    Merging from release1_p12:
978    o Modifications for using pkg/exf with pkg/seaice
979      - improved description of the various forcing configurations
980      - added basic radiation bulk formulae to pkg/exf
981      - units/sign fix for evap computation in exf_getffields.F
982      - updated verification/global_with_exf/results/output.txt
983    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
984      (SBO) core products, including oceanic mass, center-of-mass,
985      angular, and bottom pressure (see pkg/sbo/README.sbo).
986    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
987      to avoid negative values in shallow regions.
988      - updated verification/natl_box/results/output.txt
989      - updated verification/lab_sea/results/output.txt
990    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
991    o Added useSingleCpuIO option (see PARAMS.h).
992    o Updated useSingleCpuIO option in mdsio_writefield.F to
993      work with multi-field files, e.g., for single-file pickup.
994    o pkg/seaice:
995      - bug fix in growth.F: QNET for no shortwave case
996      - added HeffFile for specifying initial sea-ice thickness
997      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
998    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
999      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1000    o pkg/seaice:
1001      - adjoint-friendly modifications
1002      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1003    
1004    checkpoint48e_post
1005    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1006    o dynamics: change definition of computational domain & adapt mom_fluxform
1007      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1008    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1009        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1010        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1011        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1012        inverted_barometer solid-body.cs-32x32x1
1013      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1014    
1015    checkpoint48d_post
1016    o in preparation for r*:
1017     a) use pre-computed gradient of hydrostatic potential:
1018        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1019     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1020        => affects results of glob_oce_pressure (different truncation error)  
1021      update output.txt of ideal_2D_oce & global_ocean_pressure
1022    
1023    checkpoint48d_pre
1024    o in preparation for r*:
1025      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1026      pass the 2 comp. of the grad. as arguments to momentum S/R.
1027      but for the moment, only used if it does not change the results.
1028    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1029    
1030    checkpoint48c_post
1031    Modifications in treatment of initial flux forcing controls
1032    to avoid extra storing of flux fields.
1033    
1034    checkpoint48c_pre
1035    o Added tidal_basin_2d experiment (currently 1D!)
1036    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1037    
1038    checkpoint48b_post
1039    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1040     (modification to pressure gradient not yet implemented)
1041    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1042      (for U & V) that are used for vertical advection of momentum.
1043    
1044    checkpoint48a_post
1045    o In preparation for r*, use temp. array to compute vertical transport
1046       in flux-form momentum pkg. => change results of few test-exp.
1047      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1048                        lab_sea, natl_box & plume_on_slope
1049    
1050    checkpoint48
1051    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1052    
1053    checkpoint47j_post
1054    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1055    o moved adexch from forward_step to addummy_in_stepping
1056    o added exch in ctrl_map_...
1057    o aveFreq.=0. at end of cost_final to avoid overwrite in
1058      reverse checkpointing loop
1059    o Yet more changes in gmredi:
1060      * adgmredi_calc_tensor
1061        avoiding all recomputation of gmredi_slope_limit
1062      * adgmredi_x/y/rtransport
1063        added flag for excessive storing to avoid recomp. of
1064        u/v/rtans, dTdx/y/z
1065        -> this is not really necessary and very memory-consuming
1066      * adgmredi_slope_psi:
1067        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1068      * gmredi_slope_limit
1069        re-activated full calculation of taperfct for case 'ac02'
1070    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1071    
1072    checkpoint47i_post
1073    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1074    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1075      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1076    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1077    o gmredi: fix few bugs.
1078    
1079    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1080    This will be a good checkpoint to plug into the ecco-branch.
1081    o few modif.'s to get latest version adjointed
1082      (mainly kick out code in ini_linear_phisurf)
1083    o modif's to run adjoint with exactConserv
1084    o case GM_BOLUS_ADVEC should be cleaned
1085      S/R gmredi_slope_psi should be cleaned
1086    o verification/carbon now has exactConserv=.TRUE.
1087    
1088    checkpoint47g_post
1089    o time-average AIM output: becomes independent from statvars time-average
1090      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1091    o After TAF bug fix:
1092      Tested adjoint of gmredi package.
1093      Tests were done with checkpoint47 rather than with latest
1094      checkpoint47f_post since the latter is broken for the adjoint
1095      verification/carbon/ contains both ADM and TLM gradient checks.
1096    Here they are, before they get changed/lost/stolen.
1097    Mostly modif.'s to fix numerical sensitivities.
1098    Gradient checks OK for
1099    - GM_taper_scheme:
1100      * clipping
1101      * ac02
1102      * linear
1103      * glw91
1104      * dm95
1105      * ldd97
1106    - GMREDI_OPTIONS:
1107      * GM_VISBECK_VARIABLE_K
1108      * GM_NON_UNITY_DIAGONAL
1109      * GM_EXTRA_DIAGONAL
1110      * GM_BOLUS_ADVEC
1111    in conjunction with data.gmredi parameters to be checked in
1112    in a few minutes under verification/carbon/code/
1113    
1114    checkpoint47f_post
1115    Merging from release1_p10:
1116    o modifications for using pkg/exf with pkg/seaice
1117      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1118        and SEAICE_EXTERNAL_FLUXES
1119      - pkg/exf CPP options EXF_READ_EVAP and
1120        EXF_NO_BULK_COMPUTATIONS
1121      - usage examples are Experiments 8 and 9 in
1122        verification/lab_sea/README
1123      - verification/lab_sea default experiment now uses
1124        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1125    
1126    checkpoint47e_post
1127    o created a tag prior to creating a branch
1128    
1129    checkpoint47d_post
1130    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1131      at the bottom boundary had an erroneous half slip boundary condition
1132    o added bottom drag and no slip boundary condition capabilities to
1133      oceanic pressure coordinates code
1134    o added new verification experiment global_ocean_pressure, this experiment is
1135      also described in the tutorial section of the manual
1136    checkpoint47d_pre
1137    
1138    checkpoint47c_post
1139    o Added a verification experiment for a global cubed-sphere ocean run
1140      -  verification/global_ocean.cubed32x32x30
1141      -  uses pkg/therm_seaice and pkg/bulk_forcing
1142    
1143    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1144    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1145      when using P-coordinate; only implemented for atmospheric config.
1146    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1147      NOTES: requires option NONLIN_FRSURF to be "#define".
1148    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1149    
1150    checkpoint47b_post
1151    Merging from release1_p9:
1152    o pkg/seaice
1153      - removed GOTO's and added taf directives
1154      - double precision constants to reduce the g77 (Linux)
1155        to F77 (SGI) differences reported in release1_p8
1156    o tools/genmake
1157      - added SGI options
1158    o verification/testscript
1159      - updated to that of checkpoint47a_post
1160    o verification/global_ocean.90x40x15/input/eedata
1161      - modified for SGI f77 compatibility
1162    o verification/lab_sea
1163      - added description of sea-ice model
1164      - added missing matlab routines
1165      - added test of thermodynamics parallelization
1166    
1167    checkpoint47a_post
1168    o new pkg: aim_v23
1169     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1170       for now, keep the same surface forcing as before.
1171     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1172     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1173     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1174    o add diagnostic of surface correction term in monitor output
1175    
1176    o bulk_force and therm_seaice
1177    - Two packages:  bulk_force (Bulk forcing)
1178      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1179    - Earlier integration from Stephaine Dutkiewicz
1180      and Patrick Heimbach.
1181    - Two ifdef statements for compile time,
1182       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1183    
1184    checkpoint47
1185    differentiable version of checkpoint46n_post
1186    o bug fix in quasihydrostaticterms
1187    o * "clean" adjoint code (in terms of extensive recomputations)
1188        can now be obtained for all GMREDI options (i.e. for
1189        - GM_VISBECK_VARIABLE_K
1190        - GM_NON_UNITY_DIAGONAL
1191        - GM_EXTRA_DIAGONAL
1192        - GM_BOLUS_ADVEC )
1193      * However, wrong gradient check problem remains unsolved.
1194      * New CPP options have been introduced for different
1195        tapering schemes
1196    o external_fields_load now part of differentiation list
1197    o pressure needs multiple storing;
1198      would be nice to have store_pressure at beginning or
1199      end of forward_step, e.g. by having phiHyd global (5-dim.)
1200      (NB: pressure is needed for certain cases in find_rho,
1201      which is also invoked through convective_adjustment).
1202    o recomputations in find_rho for cases
1203     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1204    o #define ATMOSPHERIC_LOADING should be differentiable
1205    o ini_forcing shifted to begining of initialise_varia
1206    o Incorporating QNVS line search routines into MITgcm
1207      (this is separate code, and therefore not under pkg)
1208      lsopt/, optim/
1209    o Updated verification/carbon/
1210      - #define GM_VISBECK_VARIABLE_K
1211      - GM_taper_scheme    = 'ldd97'    
1212    
1213    checkpoint46n_post
1214    Merging from release1_p8:
1215    o verification/natl_box:
1216      updating new external_fields_load routine
1217    o New package: pkg/seaice
1218      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1219      The sea-ice code is based on Hibler (1979-1980).
1220      Two sea-ice dynamic solvers, ADI and LSR, are included.
1221      In addition to computing prognostic sea-ice variables and diagnosing
1222      the forcing/external data fields that drive the ocean model,
1223      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1224      The implied surface heat flux is then stored in variable
1225      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1226      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1227      non-local transport term.  Because this call precedes model
1228      thermodynamics, temperature under sea-ice may not be "exactly" at
1229      the freezing point by the time theta is dumped or time-averaged.
1230      N.B.: fairly large differences in accuracy occur across
1231            different platforms/compilers; comparison between
1232            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1233            generated output gives:
1234       T           S           U           V
1235      C D M    c        m  s        m  s        m  s        m  s
1236      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1237      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1238      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1239    
1240      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1241    o GAD:
1242      - generated new common blocks to account for call of
1243        same gad routines with differing traceridentities
1244        (needed to modify tracerIdentity indices in GAD.h)
1245      - generated separate common blocks for case useCubedSphereExchange
1246        (Department of Futurology)
1247      - parameter lists to gmredi_?transport: added tracerIdentity
1248      - added new key indices to tamc.h
1249    o external_fields_load:
1250      - added this routine to TAF list
1251      - needed to make some common blocks global and additional storing
1252        along the same lines as exf package (checkpoint_lev?_directives.h)
1253    o exf:
1254      updated external forcing package
1255      - bug fixes carried over from ecco-branch
1256        (missing OBCS_OPTIONS.h in two routines)
1257      - enable easy to use "no forcing".
1258      - added exf I/O for atmospheric loading
1259      - added exf I/O for runoff data
1260      - transfered scaling between exf <-> MITgcm to exf namelist
1261    o Adding new verification experiment global_with_exf.
1262      This verification experiment is almost identical to the
1263      global_ocean.90x40x15 experiment, except that it uses
1264      the exf (and cal) package instead of the
1265      external_fields_load routine (cf README file).
1266    
1267    checkpoint46m_post
1268    o modified testscript to return -- when there are no lines of "%MON" output
1269    o added new flag "quasiHydrostatic" for QH mode
1270      and new routine quasihydrostaticterms()
1271    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1272      New routine: mom_u_coriolis_nh()
1273    o fixed sign of non-hydrostatic metric terms in u and v equations.
1274      Depend on correct sign of gravitySign.
1275    o added work.pc* to .cvsignore in aim directories using ifc
1276    o introduced flag for controllin non-hydrostatic metric terms
1277    o removed gravitySign from PARM04
1278    o switched to g77/ifc from pgf77 in aim experiments
1279    
1280    checkpoint46l_post
1281    o made convective adjustment work with pressure coordinates:
1282     - changed the direction of k-loop in convective_adjustment.F for the
1283       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1284     - adjusted the reference pressure k-index in convective_adjustment.F
1285     - adjusted the convection condition in convect.F (in analogy to
1286       calc_ivdc.F)
1287     - convective_adjustment no longer computes anything on the halos
1288     - removed the warnings about negative salinity from find_rho.F and
1289       find_alpha.F; instead the new routine look_for_neg_salinity, called
1290       at the beginning of find_rho, find_alpha, and find_beta, does a
1291       check of the entire slice, if CPP-option
1292       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1293    checkpoint46l_pre
1294    
1295    checkpoint46k_post
1296    o fixed the verification/global_ocean.90x40x15 experiment:
1297     - new bathymetry (the world according to A., JMC, and M.)
1298     - new initial fields and forcing fields (*.bin files)
1299     - new POLY3.COEFFS (for the next release one should switch to a full
1300       equation of state: JMD95P or MDJWF)
1301     - fixed several errors and redundancies in the data file
1302     - experiment uses looped cells
1303     - added matlab directory with diagnostic scripts for plotting of output
1304    
1305    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1306     - read AIM physics parameters from a file (data.aimphys)
1307     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1308    
1309    checkpoint46j_post
1310    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1311    o move wVel computation at the end of the time step, in S/R integr_continuity
1312    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1313    o update timeave pkg for wVel diagnostic.
1314    checkpoint46j_pre
1315    
1316    checkpoint46i_post
1317    o Clean up AIM package (and keep the results unchanged):
1318      include CPP_OPTION and use IMPLICT NONE in all routines ;
1319      declare all the variables _RL ; use _d 0 for all numerical constants.
1320      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1321    
1322    checkpoint46h_post
1323    o cleaned up the use of rhoNil and rhoConst.
1324      - rhoNil should only appear in the LINEAR equation of state, everywhere
1325        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1326        and the dynamical equations are all divided by rhoConst
1327    o introduced new parameter rhoConstFresh, a reference density of fresh
1328      water, to remove the fresh water flux's dependence on rhoNil. The default
1329      value is 999.8 kg/m^3
1330    o cleanup up external_forcing.F and external_forcing_surf.F
1331      - can now be used by both OCEANIC and OCEANICP
1332    checkpoint46h_pre
1333    
1334     Added code to convert surface volume flux (fresh water) into
1335     a mass flux when using P coordinates in the ocean (OCEANICP).
1336     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1337    
1338    checkpoint46g_post
1339    o Include a new diagnostic variable phiHydLow for the ocean model
1340      - in z-coordinates, it is the bottom pressure anomaly
1341      - in p-coordinates, it is the sea surface elevation
1342      - in both cases, these variable have global drift, reflecting the mass
1343        drift in z-coordinates and the volume drift in p-coordinates
1344      - included time averaging for phiHydLow, be aware of the drift!
1345    o depth-dependent computation of Bo_surf for pressure coordinates
1346      in the ocean (buoyancyRelation='OCEANICP')
1347      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1348        Theta, Salinity, and Pressure in the parameter list. This routine is
1349        presently contained in find_rho.F. This routine does not give the
1350        correct density for 'POLY3', which would be a z-dependent reference
1351        density.
1352    o cleaned up find_rho
1353      - removed obsolete 'eqn' from the parameter list.
1354    o added two new verification experiments: gop and goz
1355      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1356    checkpoint46g_pre
1357    
1358    checkpoint46f_post
1359    o Enable tangent linear (forward mode) gradient checks:
1360      - extended active file handling to g_... files
1361      - added TANGENT_SIMULATION to theSimulationMode
1362      - extended grdchk package accordingly
1363    o added tangent linear setup in verification/carbon/code_ftl
1364    o added adjoint setup in verification/front_relax/code_ad
1365    
1366    checkpoint46e_post
1367    o Added new equation of state -> MDJWF
1368      - EOS of McDougall et al., 2002, JAOT, submitted
1369      - caveat: the equation of state is only valid for a smaller (more
1370        realistic?) range of values than JMD95P/Z and UNESCO
1371      - added masks to the calculation of pressure in store_pressure
1372      - added more check values for density in check_eos (ini_eos.F), some of
1373        the old check values are out of the range of the MDJWF-eos, so don't
1374        expect perfect matches for those
1375    checkpoint46e_pre
1376    
1377    checkpoint46d_post
1378    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1379      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1380      case of pressure coordinates. eosType='JMD95Z' in
1381      combination with buoyancyRelation='OCEANICP' now causes an error.
1382    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1383      in find_alpha/beta.
1384    checkpoint46d_pre
1385    
1386    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1387      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1388    
1389    checkpoint46c_post
1390    o Changes necessary for ocean in p-coordinates
1391     -  Added new buoyancy relation = 'OCEANICP'
1392     -  Added new parameters = gravitySign (this used to be contained inside
1393        the factor dRdZ which I added when we first switched to R coordinates).
1394     X GM/Redi is not compatible (yet)
1395     X bottom drag and no-slip need to be debugged.
1396    checkpoint46c_pre
1397    
1398    checkpoint46b_post
1399    o Added new equation of state -> JMD95Z and JMD95P
1400      - EOS of Jackett and McDougall, 1995, JAOT
1401      - moved all EOS parameters into EOS.h
1402      - new routines ini_eos.F, store_pressure.F
1403    o Added UNESCO EOS, but not recommended because it requires
1404      in-situ temperature (see JMD95)
1405    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1406      unesco.f to be used with POLY3
1407    checkpoint46b_pre
1408    
1409    checkpoint46a_post
1410    o Added (atmospheric) pressure loading
1411      - new field in FFIELDS.h, etc...
1412      - new cpp flag ATMOSPHERIC_LOADING
1413    o Changed hFacC to _hFacC in calc_phi_hyd.F
1414    o Added SHORTWAVE_HEATING to some files for consistency
1415    checkpoint46a_pre
1416    
1417    checkpoint46
1418    further merges from release1_p5
1419    o new ctrl package
1420      - adopted from ECCO environment to enable optimization
1421      - added Eliassen Palm fluxes to controls
1422    o added Eliassen Palm flux controls to gradient check package
1423    o cost package
1424      - Compatible with new ctrl package
1425      - added Eliassen Palm cost hooks
1426      - modif's of existing cost functions
1427    o Adjoint-related bug fixes in kpp:
1428      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1429      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1430    o autodiff package
1431      - flow directives:
1432        + new for S/R do_the_model_io
1433        + enhanced for S/R checkpoint
1434        + new gmredi.flow
1435      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1436        disable adcommon.h/g_common.h by default.
1437      - fixed problem for adjoint of global_max
1438    o modified verification/carbon/
1439    o New setup for adjoint of global_ocean
1440    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1441    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1442    o incorporated hooks for sponge layer code (external_forcing.F)
1443    
1444    checkpoint45d_post
1445    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1446    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1447      (affects plume_on_slope "cg2d" output)
1448    o add new parameter deltaTfreesurf for free-surface time stepping
1449    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1450  o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B  o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1451  o change phiMin in exp1 (to agree with documentation)  o change phiMin in exp1 (to agree with documentation)
1452  o add new flags:  o add new flags:

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