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$partialdiff sub M$ root mean sq anom [ OLE2 CAM5 MENSUALES pr ]

Latitude grid: /Y (degree_north) ordered (90S) to (90N) by 0.2346806 N= 768 pts :grid
Depth grid: /Z (m) ordered [ (0)] :grid
M grid: /M (unitless) ordered (1.5) to (4.5) by 1.0 N= 4 pts :grid

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CPTv10+