$partialdiff sub X$ $partialdiff sub Y$ [ NOAA NCEP EMC CMB GLOBAL Reyn_SmithOIv2 climatology mask ]
| Longitude | grid: /X (degree_east) periodic (0) to (1W) by 1.0 N= 360 pts :grid |
|---|---|
| Latitude | grid: /Y (degree_north) ordered (89N) to (89S) by 1.0 N= 179 pts :grid |