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max [ NOAA NCEP-NCAR CDAS-1 MONTHLY Intrinsic PressureLevel phi ]

Latitude grid: /Y (degree_north) ordered (90N) to (90S) by 2.5 N= 73 pts :grid
Time grid: /T (days since 1960-01-01) ordered [ (Jan 1980) (Feb 1980) (Mar 1980) ... (Aug 2014)] N= 416 pts :grid

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CPTv10+