Accessing data using CPT (ingrid imposes a limit of 3999 points in the degrees-east grid)

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root mean sq $partialdiff sub X$ root mean sq $partialdiff sub P$ mean [ ( NOAA NCEP-NCAR CDAS-1 MONTHLY Intrinsic PressureLevel temp ) - ( NOAA NCEP-NCAR CDAS-1 MONTHLY Intrinsic PressureLevel temp climatology ) ]

Time grid: /T (months since 1960-01-01) ordered (Dec 1981) to (Oct 2019) by 1.0 N= 455 pts :grid

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CPTv10+