--- MITgcm/doc/tag-index	2004/09/21 15:47:59	1.348
+++ MITgcm/doc/tag-index	2004/09/27 14:54:35	1.358
@@ -1,7 +1,50 @@
-$Header: /home/ubuntu/mnt/e9_copy/MITgcm/doc/tag-index,v 1.348 2004/09/21 15:47:59 jmc Exp $
+$Header: /home/ubuntu/mnt/e9_copy/MITgcm/doc/tag-index,v 1.358 2004/09/27 14:54:35 jmc Exp $
 
     Notes on tags used in MITgcmUV
     ==============================
+
+o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
+    be 2 times larger than the minimum size the advection scheme requires.
+    now get a perfect conservation of salt in advect_cs test-exp (updated)
+o GGL90 (Gaspar's TKE mixed layer)
+  - add horizontal diffusion of TKE, requires exchanges in 
+    do_fields_blocking_exchanges, horizontal diffusivity is zero by 
+    default. In OPA there is no horizontal diffusion of TKE but the 
+    mixing coefficients are computed from a horizontal average of TKE of
+    6 points or so. I think that diffusion has a little more physical
+    justification.
+  - clean up ggl90_calc in the hope of reducing memory usage (this hope 
+    was in vain)
+  - mask tke-variable in ggl90_init
+o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
+o fix biharmonic diffusion on CS-grid.
+o more obcs stuff
+  - added obcs_external_fields_load as an alternative to the EXF-pkg option
+    for reading boundary values. This routine is called from 
+    obcs_prescribe_read
+  - updated obcs_check
+  - changed sponge layer relaxation parameter units for days to seconds
+  - turned off sponge layer by default
+
+checkpoint55c_post
+o obcs stuff
+  - new runtime flags useOBCSprescribe, useOBCSbalance
+  - re-arranged obcs_calc
+  - moved exf_getobcs to obcs_prescibe_read
+    obcs_prescibe_read is called after ORLANSKI stuff
+    and independent of it (executable can contain all).
+  - updated obcs_check
+  - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
+    These may be necessary only if tangential velocities are
+    prescribed at OB, not sure, needs testing.
+o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
+  which simplifies the calls and passes the ifc check-bounds test
+
+checkpoint55b_post
+o add a 2D scalar, Z location, exchange_2 routine.
+o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
+  to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
+  affects advect_cs results (for the wrong reason): update output.txt
 o use a more standard discretization for biharmonic viscosity ; 
  (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
   affects results of dome set-up: update output.txt