--- MITgcm/doc/tag-index	2002/09/16 18:23:22	1.85
+++ MITgcm/doc/tag-index	2002/09/27 20:19:19	1.88
@@ -1,8 +1,50 @@
-$Header: /home/ubuntu/mnt/e9_copy/MITgcm/doc/tag-index,v 1.85 2002/09/16 18:23:22 heimbach Exp $
+$Header: /home/ubuntu/mnt/e9_copy/MITgcm/doc/tag-index,v 1.88 2002/09/27 20:19:19 jmc Exp $
 
     Notes on tags used in MITgcmUV
     ==============================
 
+checkpoint46i_post
+o Clean up AIM package (and keep the results unchanged):
+  include CPP_OPTION and use IMPLICT NONE in all routines ; 
+  declare all the variables _RL ; use _d 0 for all numerical constants.
+  use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
+
+checkpoint46h_post
+o cleaned up the use of rhoNil and rhoConst. 
+  - rhoNil should only appear in the LINEAR equation of state, everywhere 
+    else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
+    and the dynamical equations are all divided by rhoConst
+o introduced new parameter rhoConstFresh, a reference density of fresh 
+  water, to remove the fresh water flux's dependence on rhoNil. The default
+  value is 999.8 kg/m^3
+o cleanup up external_forcing.F and external_forcing_surf.F
+  - can now be used by both OCEANIC and OCEANICP
+checkpoint46h_pre
+
+ Added code to convert surface volume flux (fresh water) into
+ a mass flux when using P coordinates in the ocean (OCEANICP).
+ Note: It assumes you have set rho0=rhoConst=density of fresh water.
+
+checkpoint46g_post
+o Include a new diagnostic variable phiHydLow for the ocean model
+  - in z-coordinates, it is the bottom pressure anomaly
+  - in p-coordinates, it is the sea surface elevation
+  - in both cases, these variable have global drift, reflecting the mass
+    drift in z-coordinates and the volume drift in p-coordinates
+  - included time averaging for phiHydLow, be aware of the drift!
+o depth-dependent computation of Bo_surf for pressure coordinates 
+  in the ocean (buoyancyRelation='OCEANICP')
+  - requires a new routine (FIND_RHO_SCALAR) to compute density with only 
+    Theta, Salinity, and Pressure in the parameter list. This routine is 
+    presently contained in find_rho.F. This routine does not give the
+    correct density for 'POLY3', which would be a z-dependent reference
+    density.
+o cleaned up find_rho
+  - removed obsolete 'eqn' from the parameter list.
+o added two new verification experiments: gop and goz
+  (4x4 degree global ocean, 15 layers in pressure and height coordinates)
+checkpoint46g_pre
+
 checkpoint46f_post
 o Enable tangent linear (forward mode) gradient checks:
   - extended active file handling to g_... files