--- MITgcm/doc/tag-index	2009/10/31 03:22:33	1.1188
+++ MITgcm/doc/tag-index	2009/11/24 14:54:25	1.1199
@@ -1,9 +1,56 @@
-$Header: /home/ubuntu/mnt/e9_copy/MITgcm/doc/tag-index,v 1.1188 2009/10/31 03:22:33 jmc Exp $
+$Header: /home/ubuntu/mnt/e9_copy/MITgcm/doc/tag-index,v 1.1199 2009/11/24 14:54:25 mlosch Exp $
 $Name:  $
 
     Notes on tags used in MITgcmUV
     ==============================
 
+o mnc: add horizontal grid coordinates (XC,YC) and (XG,YG) to netcdf output 
+  for complex grids, for now only to "state", "adstate", "adexf", "adseaice"
+o model: add Christopher Wolfe's implemetation of the single reduction cg2d
+ (d'Azevedo, Eijkhout, and Romine, 1999) with CPP-flag ALLOW_SRCG and
+ runtime flag useSRCGSolver. Modify verification experiment global_with_exf 
+ to test this code
+o pkg/cd_code:
+  Change defaut D-grid time-stepping to get the same for D-grid momentum as for
+   C-grid momentum. D-grid velocity used to be stepped forward in time with
+   Adams-Bashforth only on surface pressure term. Tests show that using AB on
+   D-grid coriolis term improves stability (as expected from CD-scheme paper).
+  To reproduce old results, add 2 options (in CD_CODE_OPTIONS.h).
+  Update results of exp: global_with_exf (x2), ideal_2D_oce, isomip (x2),
+   lab_sea (3 Fwd +3 AD), natl_box (x2), tutorial_global_oce_biogeo (Fwd+AD),
+   tutorial_global_oce_latlon, tutorial_global_oce_optim & tutorial_tracer_adjsens.
+  Keep old results by adding CD_CODE_OPTIONS.h in exp: cfc_example, exp2,
+       lobal_ocean.90x40x15(+AD), global_ocean_ebm(+AD) and OpenAD.
+o pkg/obcs:
+ - fix bug in initialisation (broken since Oct 1rst modification)
+   for useOBCSprescribe without useEXF.
+
+checkpoint61y
+o pkg/seaice
+ - change (once again) the discretization for the evp solver: rather than
+   squaring the averages of strain rates, average the squares to give
+   a better approximation to VP behavior (in simple test); this breaks
+   verification experiments that use EVP (lab_sea and lab_sea.hb87)
+    --> update outputs
+o add CPP-flag (in mom_calc_visc.F) and TAF directive (in gmredi_slope_limit)
+  to improve vectorization of adjoint code on TARGET_NEC_SX
+o verification/vermix:
+  - change vermix to a more "classical" 1d column with high vertical 
+    resolution, seasonal heat flux forcing and constant wind forcing 
+    --> update outputs
+o pkg/seaice
+ - fix diagnostics of principal stress components for EVP
+ - add optional diagnostics of non-linear convergence for LSOR solver
+ - make maximum zeta a runtime parameter
+o model/src (3-d solver):
+  Undo modif from Dec 12, 2005 (solve_for_pressure.F cvs version v.49),
+   which consisted in removing the Surf. Non-Hydrostatic pressure from the
+   whole column and adding it to Eta (inspired from Casualli, 1999):
+   Only affects 3-D solver initial guess and only if using ExactConserv,
+   but tests did show a degradation of solver convergence. For this reason,
+   decide to disable this piece of code.
+   to recover previous version, just set zeroPsNH = exactConserv (line 78).
+  Update output of exp. global_ocean.cs32x15.viscA4 & hs94.cs-32x32x5.impIGW
 o pkg/ggl90: 
  - fix previous modif (unfortunatly has not been documented here).
 o pkg/seaice/autodiff:
@@ -12,7 +59,7 @@
    it was done by default, now clipping is disabled by default
  - modify computation and store zetaC/Z in seaice_evp for TAF
  - add CPP-flag SEAICE_ALLOW_CLIPVELS (undefined by default)
- - change seaice_calc_viscosities/strainraties for better
+ - change seaice_calc_viscosities/strainrates for better
    vectorization after AD by TAF
  - rearrange common blocks in SEAICE.h once again for easier dumps of
    adjoint output, adjust adcommon.h and g_common.h