--- MITgcm_contrib/eh3/llc/ecco-godae/README	2006/11/13 17:19:06	1.2
+++ MITgcm_contrib/eh3/llc/ecco-godae/README	2006/11/14 00:57:02	1.3
@@ -9,15 +9,47 @@
 or they will not be read correctly by MITgcm:
 
   cd run
-  for i in 1 2 3 4 5 ; do 
+  for i in 1 2 3 4 5 6; do 
     ln -s ../input/llc_p90_${i}.mitgrid tile00${i}.mitgrid
   done
 
+Change topology:
+ 
+cd MITgcm/utils/exch2/matlab-topology-generator/
+ 
+modify matlab script driver_llc.m
+line
+nr = 360; ng = 90; nb = 90; tnx=90;tny=90;
+to (e.g.)
+nr = 360; ng = 90; nb = 90; tnx=30;tny=30;
+run script
+ 
+This generates routine and header
+w2_e2setup.F
+W2_EXCH2_TOPOLOGY.h
+which need to go in code/
+
+Accordingly, bathy.0??.0??.data need changing.
+
+N.B. Domain decomposition nPy not active with exch2, i.e.
+possible decomps are (for orig. with 17 tiles):
+sNx = 90 30 90  30
+sNy = 90 30 90  30
+nSx = 17 17  1   1
+nSy =  1  1  1   1
+nPx =  1  9 17 153
+nPy =  1  1  1   1
+
+I've generated artificial tile #18 with all zeros
+blanklist.txt needs to be generated by hand.
+Not clear how many procs to invoke in presence of blank list.
+
 Setup code_15lev/, input_15lev/
 -------------------------------
 
-Real bathymetry, 15 vertical levels,
-monthly climatological forcing via exf package.
+* Real bathymetry, 15 vertical levels,
+* monthly climatological forcing via exf package, uses
+  4x4 deg. fields with on-the-fly interpolation
 * Bathymetry is generated via script ... in ...
 * Initial conditions for T, S are generated via script ... in ...