--- MITgcm/doc/tag-index	1999/05/18 18:31:31	1.21
+++ MITgcm/doc/tag-index	1999/05/26 23:01:16	1.22
@@ -1,8 +1,12 @@
-$Header: /home/ubuntu/mnt/e9_copy/MITgcm/doc/tag-index,v 1.21 1999/05/18 18:31:31 adcroft Exp $
+$Header: /home/ubuntu/mnt/e9_copy/MITgcm/doc/tag-index,v 1.22 1999/05/26 23:01:16 adcroft Exp $
 
     Notes on tags used in MITgcmUV
     ==============================
 
+checkpoint23
+ o Added del^4 diffusion for salt and temperature
+ o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
+
 checkpoint22
  o Made many small changes: implicit none, format(i5), etc...
  o Introduced KPP mixing scheme (compiles and runs but *not* tested)