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revision 1.550 by jmc, Tue Sep 20 18:09:04 2005 UTC revision 1.577 by jmc, Thu Nov 3 19:06:51 2005 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    checkpoint57w_post
8    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
9                 fix the singleCpuIO RS version of MDSWRITEFIELD
10       and add a WARNING if using globalFiles=T with multi-processors.
11    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
12      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
13    o tracer advection scheme:
14      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
15       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
16       was not very convenient).
17      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
18       (further tests needed for the implicit DST & Flux-Limiter schemes).
19    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
20      and sRef for convenience, handy, when you want to initialize
21      ptracers in a large domain with a constant non-zero value. Also,
22      untangle ptracers_init.F a little.
23    
24    checkpoint57v_post
25    o change dome exp. to use variable viscosity in side-drag terms.
26    o remove all the files from the cfc_offline test since they are now
27      incorporated into tutorial_cfc_offline which has been producing
28      identical results for a few days of testing
29    o add new parameter: sideDragFactor to enable half-slip-side BC
30      and change side-drag S/R to use viscosity from mom_calc_visc
31      (can switch back by setting sideDragFactor=0.); affects results at
32      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
33       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
34    o vorticity & strain are now computed without masking, to account for
35      no-slip-side BC in variable viscosity calculation ; mask is applied
36      anyway later on, before computing advection/coriolis terms.
37    o modify exp4 to test new obcs support for reading from external files
38      and for passive tracers
39    o fix behavior of ptracers_monitor when monitor output is written to a
40      netcdf-file; still not independent of monitor.F (writes in the same
41      file).
42    o change default value of tRef (put a uniform, meaningful value for ocean
43      & atmos) and initialize sRef (was missing, as Martin mentioned).
44    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
45      to be proportional to enstrophy dissipation length.  Thus,
46       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
47      This is now consistent with Smagorinsky and with the manual.
48    
49    checkpoint57u_post
50    o OBCS and PTRACERS: add open boundary support for passive tracers
51      - either use homogenous (pseudo) v.Neumann conditions or prescribe
52        OB-values from file; this is not different from the way theta and salinity
53        are treated
54      - however, Orlanski-radiation conditions are not supported, and the model
55        will stop if you use pTracers and Orlanski at the same time.
56      - beefed up the rountine obcs_external_fields_load: now only those open
57        boundary values are overwritten with values from files for which there
58        are really files, otherwise the OB-fields remain untouched. This makes
59        it possible to use different OBs at different ends of the domain (as
60        with EXF)
61    o reduce number of exch calls in shap_filt (s2).
62    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
63      truncation level) 4/5 MLAdjust test results (11&12 digits match).
64    
65    checkpoint57t_post
66    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
67    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
68      same truncation, independent of the face number: affects affects several
69      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
70    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
71      note that biharmonic viscosity + no-slip was not tested in any experiment.
72    o fix bug in non-linear free-surf side-drag ; generate new output for
73      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
74    o make mnc honor the writeBinaryPrec flag for most kinds of output
75    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
76    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
77      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
78    o add brackets in multi-terms sum to get same truncation, independent of
79      the face number (manage to get exactly same value of gU,gV at the cs-edge)
80      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
81    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
82      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
83      a maximum grid-scale Reynolds number.  Also, changes all length calculations
84      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
85      Suggested values of viscosity parameters found in mom_calc_visc.
86      Many new viscosity diagnostics available.
87    
88  checkpoint57s_post  checkpoint57s_post
89  o Add clearing-house for viscosity calculations, mom_calc_visc and  o Add clearing-house for viscosity calculations, mom_calc_visc and
90    correct numerous bugs in LeithD and Smagorinsky discretizations.      correct numerous bugs in LeithD and Smagorinsky discretizations.  

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