$partialdiff sub Y$ $partialdiff sub Y$ [ NOAA NCEP EMC CMB GLOBAL Reyn_SmithOIv2 monthly mask ]
| Longitude | grid: /X (degree_east) periodic (0.5E) to (0.5W) by 1.0 N= 360 pts :grid |
|---|---|
| Latitude | grid: /Y (degree_north) ordered (88.5N) to (88.5S) by 1.0 N= 178 pts :grid |