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root mean sq [ NOAA NCEP-NCAR CDAS-1 MONTHLY Intrinsic PressureLevel vtemp ]

Latitude grid: /Y (degree_north) ordered (90N) to (90S) by 2.5 N= 73 pts :grid
P grid: /P (mb) ordered [ (962.5) (887.5) (775.0) (650.0) (550.0) (450.0) (350.0)] :grid
Time grid: /T (months since 1960-01-01) ordered (Jan 1980) to (Aug 2014) by 1.0 N= 416 pts :grid

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CPTv10+