English: Map of various index regions used to measure the strength of an ENSO; plotted over a background of the +2 and +3 °C contours of the 1997-8 DJF surface temperature anomaly.
1: [10S, 5S] and [90W, 80W]
2: [5S, Eq] and [90W, 80W]
3: [5S, 5N] and [90W, 150W]
4: [5S, 5N] and [150W, 160E]
3.4: [5S, 5N] and [170W, 120W]
Each index captures different properties; nino3.4 is probably most commonly used.
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The original description page was here. All following user names refer to en.wikipedia.
2006-01-27 21:21 William M. Connolley 918×305× (8566 bytes) Map of various index regions used to measure the strength of an [[El Nino|ENSO]]; plotted over a background of the +2 and +3 oC contours of the 1997-8 DJF surface temperature anomaly. * 1: [10S, 5S] and [90W, 80W] * 2: [5S, Eq] and [90W, 80W] * 3: [5S, 5
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