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$integral dX$ [ NOAA NCEP EMC CMB GLOBAL Reyn_SmithOIv2 climatology mask ]

Longitude grid: /X (degree_east) ordered (0) to (0) by 1.0 N= 361 pts :grid
Latitude grid: /Y (degree_north) ordered (89.5N) to (89.5S) by 1.0 N= 180 pts :grid

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