added comment about parameter PRMSL

NOAA-EMC · Jun 9, 2024 · 6c315ed · 6c315ed
1 parent a5351df
commit 6c315ed
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/src/params.F90 b/src/params.F90
@@ -269,6 +269,13 @@ module params
   data paramlist(235) /gribparam(2, 189, 0, 0, 15, 'VPTMP')/
   data paramlist(236) /gribparam(2, 198, 0, 1, 207, 'NCIP')/
   data paramlist(237) /gribparam(2, 239, 0, 1, 208, 'SNOT')/
+  ! The following param shares the same GRIB2 discipline, category,
+  ! and number as PRMSL. Since the parameter lookup subroutine starts
+  ! at the beginning of the list, and returns the first abbreviation
+  ! with matching G2 numbers, the MSLSA abbreviation can never be
+  ! returned. According to Boi: In the past, some user used PRMSL or
+  ! MSLSA in grib1. Then, they converted to grib2 and these parameters
+  ! were in same "0,3,1".
   data paramlist(238) /gribparam(2, 128, 0, 3, 1, 'MSLSA')/
   data paramlist(239) /gribparam(2, 137, 0, 3, 199, 'TSLSA')/
   data paramlist(240) /gribparam(129, 141, 0, 3, 200, 'PLPL')/