--- trunk/phylmd/indicesol.f	2018/08/02 15:55:01	300
+++ trunk/phylmd/indicesol.f	2018/08/02 17:23:07	301
@@ -5,8 +5,14 @@
   INTEGER, parameter:: nbsrf=4
 
   INTEGER, parameter:: is_ter = 1 ! land
+  ! Note: the first surface type must be land. pbl_surface must call
+  ! the land interface first because the ocean needs the run-off.
+
   INTEGER, parameter:: is_lic = 2 ! land ice
+
   INTEGER, parameter:: is_oce = 3 ! ocean
+  ! Ocean must be before sea ice.
+  
   INTEGER, parameter:: is_sic = 4 ! sea ice
 
   REAL, parameter:: epsfra = 1E-5