$partialdiff sub T$ $partialdiff sub T$ [ Indices nino EXTENDED NINO34 ]
| Time | grid: /T (days since 1960-01-01) ordered [ (1330 1 Mar 1856 - 1930 31 Mar 1856) (1930 31 Mar 1856 - 0600 1 May 1856) (0600 1 May 1856 - 1800 31 May 1856) ... (0600 1 May 2014 - 1800 31 May 2014)] N= 1899 pts :grid | 
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