$partialdiff sub Y$ [ NOAA NCEP-NCAR CDAS-1 MONTHLY Intrinsic total_air_column PWAT ]
| Longitude | grid: /X (degree_east) periodic (0) to (2.5W) by 2.5 N= 144 pts :grid |
|---|---|
| Latitude | grid: /Y (degree_north) ordered (88.75N) to (88.75S) by 2.5 N= 72 pts :grid |
| Time | grid: /T (days since 1960-01-01) ordered [ (Jan 1949) (Feb 1949) (Mar 1949) ... (Aug 2014)] N= 788 pts :grid |
