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$partialdiff sub T$ [ NOAA NCEP-NCAR CDAS-1 MONTHLY Intrinsic surface pressure ] anomalies

Longitude grid: /X (degree_east) periodic (0) to (2.5W) by 2.5 N= 144 pts :grid
Latitude grid: /Y (degree_north) ordered (90N) to (90S) by 2.5 N= 73 pts :grid
Time grid: /T (days since 1960-01-01) (360) ordered [ (1159 3 Jan 1949 - 1159 4 Jan 1949) (1159 3 Mar 1949 - 1159 4 Mar 1949) (1159 4 May 1949 - 1159 5 May 1949) ... (1202 30 Oct 2023 - 1202 1 Nov 2023)] N= 352 pts :grid

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