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revision 1.562 by mlosch, Mon Oct 10 05:55:52 2005 UTC revision 1.627 by jmc, Mon Mar 13 04:36:59 2006 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
8      update output.txt of exp. aim.5l_cs.thSI
9    o various mnc cleanups and improvements:
10      + shrink lookup tables by factor of ~4
11      + better error reporting when running out of lookup space
12      + able to handle longer path/file names (up to 500 chars)
13    o adjoint:
14      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
15      - TBD: "hidden" mom_vecinv recomp. in dynamics
16    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
17     (allow to differentiate between forcing components using new integer flags:
18      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
19     and add new flag to put Dissipation tendency out of Adams-Bashforth.
20    o ecco
21      - enable trend removal from SSH anomaly obs.
22    o adjoint
23      - a fix for PmEpR when #undef EXACT_CONSERV
24      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
25      - try to fix "hidden" recomp. in forward_step for NLFS
26        (NLFS seems broken sometimes after I checked it in)
27    o seaice:
28     - add c-grid version of the dynamic solver:
29       + three new routines that are the c-grid substitute lsr, dynsolver
30         and ostres
31       + put a few fields that were local to dynsolver into global common
32         blocks, so that I can move the computation of stresses etc into
33         seaice_lsr (saves coding but may break the adjoint).
34     - replace more hardwired parameters by runtime parameters
35     - add ice masks that mask the rhs of the implicit solvers where there
36       is no ice (commented out in seaice_dynsolver, because i am not sure
37       if this works properly), eventually this should replace the clipping
38       of ice velocities in seaice_dynsolver to +/-40cm/s.
39    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
40      include it only where its needed
41    o move balancing of fluxes before the call of external_forcing_surf
42    o seaice:
43      - correct units of turning angles (now they are really in degrees)
44      - move computation of GWATX/Y out of main routine into dynsolver
45      - initialize GWATX/Y in seaice_init
46    o Apply mask on Fresh-Water flux (needed for SSH forcing).
47      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
48    o seaice: add runtime flags for turning angles (default to zero)
49    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
50      and trend from exf forcing and ctrl control adjustments
51    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
52      (since checkpoint57x_post)
53    o change the default rotation period to 86164.s = the Earth rotation
54    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
55      and based on a reference stratification. Tested within hs94.cs-32x32x5.
56    o seaice advection: add code for choosing between the default (2nd order
57      central differences) and multiDim advection schemes provided by
58      pkg/generic_advdiff
59    o seaice:
60      - removed all references to SEAICE_GRID.h fields from
61        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
62        (cubed-sphere configuration will change a little)
63      - grid computations in seaice_init are obsolete now.
64      - cleaned up code a little so that is easier to read (hopefully).
65      - added new (better?) discretizations of default advection and diffusion
66        (turn on with SEAICEuseFluxForm)
67      - replace 1 in 3d global fields by kSurface in growth.F
68      
69    checkpoint58a_post
70    o seaice:
71      - bug fix in advect.F
72    o shelfice:
73      - separate shelfice load anomaly from pload (breaks with time
74        dependent forcing), => introduce constant field shelficeLoadAnomaly.
75        Its default is 0., but it may be computed more cleverly from (unknown)
76        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
77        done offline. A good approximation of the pressure load anomaly is
78        necessary to avoid large initial adjustment processes underneath
79        deep-reaching shelfice.
80      - small fix in ISOMIP shelfice_thermodynamics
81      - add more sophisticated thermodynamics of Hellmer (1989), this is
82        now the default
83      - give a few constants more intuitive names
84    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
85      if bulk formulae are used in long integration (especially EmPmR). Turn
86      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
87      if balancePrintMean, the imbalance that is substracted is printed to
88      STDOUT.
89    o fix bug (typo) in obcs_apply_eta.F
90    o add a new package shelfice which enables us to model the circulation
91      underneath shelf-ice with draughts of hundreds of meters.
92     - works
93     - to do: + include improved thermodynamics
94              + check whether kSurfC (from model/inc/SURFACE.h) can be used
95                instead of new field kTopC
96              + can we use topoFile, Ro_surf and existing code in ini_depth.F
97                instead of new field R_shelfIce and new code in ini_depth.F
98                and ini_mask_etc.F?
99              + adjust vertical mixing schemes?
100    o seaice pkg:
101     - add a cpp-flag to include a simple formula for a salinity dependent
102       freezing point of sea water at the surface
103     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
104       meridional stresses are now different (and hopefully correct)
105    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
106       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
107       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
108    o pkg/diagnostics: add options and parameters for regional-statistics
109       diagnostics ; define regions by reading a region-mask from a file
110       (might add other options later)
111    o pkg/bulk_force:
112     - add option and parameters to use AIM surface-flux formulae.
113     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
114       others forcing fields (defined in PARM05, parameter file "data") are loaded
115       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
116     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
117     - use the right EXCH call for uwind,vwind (to work on CS-grid).
118     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
119       and parameters (note: calcWindStress replaces .NOT.readwindstress).
120     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
121    
122    checkpoint58
123    o add "--embed-source" option to genmake2 which, when the supporting
124      tools can be compiled (as determined by genmake2) will turn on the
125      embed_files package which then embeds the entire MITgcm source code
126      (*.[fFhc] + Makefile) used for the build within the executable
127      - requested by CNH but off by default
128      - adds a paltry <9MB to the mitgcmuv executable in most cases
129      - only writes the output when useEMBEDSRC in eedata is true
130    o clean up 3-dim. relaxation codes:
131      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
132      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
133      * Thanks to Tom Haine for testing!
134    
135    checkpoint57z_post
136    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
137      affects output (@ truncation level) of exp. plume_on_slope ; updated.
138    o fix the pickup behavior for obcs in combination with ptracers
139    o fix a bug in ptracers_external_fields_load
140    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
141      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
142    o transfered surface NH pressure to eta field (if exactConserv).
143    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
144         and update lab_sea output.txt file.
145    o completing 3-dim. relaxation code: additional term
146         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
147      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
148      * At compile time, in "EXF_OPTIONS.h" set
149          #define  ALLOW_CLIMTEMP_RELAXATION
150          #define  ALLOW_CLIMSALT_RELAXATION
151      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
152          tauThetaClimRelax3Dim = 15552000.0,
153          tauSaltClimRelax3Dim  = 15552000.0,
154      * 3 cases:
155          1) Use a constant-in-time 3-dim. field
156          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
157          3) Real-time relax. to time-evolving prescribed field
158    o Adding Laplacian-type smoothness constraint on
159      initial and boundary (forcing) controls (ic, bc)
160      * enable at compile-time via
161        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
162      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
163      * Absolute scale somewhat unclear so far
164      * no area weighting was included since no other cost term does so far
165    
166    checkpoint57y_post
167    First step for a NLFS adjoint
168    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
169    o new init. routines for calc_r_star, calc_surf_dr
170    o still need to deal with ini_masks_etc
171    o testreport seemed happy
172    checkpoint57y_pre
173    
174    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
175    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
176    o add new offset feature to offline pkg (plus minor cleanup)
177    o cfc fixes for final year of integration
178    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
179      be in GCHEM_OPTIONS).
180    
181    checkpoint57x_post
182    o fix testreport Pb in multiple test experiment.
183    o cleanup our namelist syntax in verification:
184      - make it more F95 standards compliant (some work still needed)
185      - allows the vast majority of our tests to work with gfortran
186    o Non-Hydrostatic:
187     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
188     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
189    o Allow to apply AB on T,S rather than on AB(gT,gS):
190     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
191     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
192       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
193     - need a "clever" read_pickup to restart from the other AB formulation
194    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
195    o remove some unused variables (reduces number of compiler warnings)
196    o adjoint
197      * Disable useVariableViscosity for adjoint for time being
198        (there are a number of extensive recomputations)
199      * Initialize certain variables needed for adjoint
200    
201    checkpoint57w_post
202    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
203                 fix the singleCpuIO RS version of MDSWRITEFIELD
204       and add a WARNING if using globalFiles=T with multi-processors.
205    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
206      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
207    o tracer advection scheme:
208      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
209       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
210       was not very convenient).
211      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
212       (further tests needed for the implicit DST & Flux-Limiter schemes).
213    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
214      and sRef for convenience, handy, when you want to initialize
215      ptracers in a large domain with a constant non-zero value. Also,
216      untangle ptracers_init.F a little.
217    
218    checkpoint57v_post
219    o change dome exp. to use variable viscosity in side-drag terms.
220    o remove all the files from the cfc_offline test since they are now
221      incorporated into tutorial_cfc_offline which has been producing
222      identical results for a few days of testing
223    o add new parameter: sideDragFactor to enable half-slip-side BC
224      and change side-drag S/R to use viscosity from mom_calc_visc
225      (can switch back by setting sideDragFactor=0.); affects results at
226      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
227       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
228    o vorticity & strain are now computed without masking, to account for
229      no-slip-side BC in variable viscosity calculation ; mask is applied
230      anyway later on, before computing advection/coriolis terms.
231    o modify exp4 to test new obcs support for reading from external files
232      and for passive tracers
233    o fix behavior of ptracers_monitor when monitor output is written to a
234      netcdf-file; still not independent of monitor.F (writes in the same
235      file).
236    o change default value of tRef (put a uniform, meaningful value for ocean
237      & atmos) and initialize sRef (was missing, as Martin mentioned).
238    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
239      to be proportional to enstrophy dissipation length.  Thus,
240       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
241      This is now consistent with Smagorinsky and with the manual.
242    
243    checkpoint57u_post
244  o OBCS and PTRACERS: add open boundary support for passive tracers  o OBCS and PTRACERS: add open boundary support for passive tracers
245    - either use homogenous (pseudo) v.Neumann conditions or prescribe    - either use homogenous (pseudo) v.Neumann conditions or prescribe
246      OB-values from file; this is not different from the way theta and salinity      OB-values from file; this is not different from the way theta and salinity

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