Cold ENSO anomalies, by season
1924-25, 1933-34, 1942-43, 1949-50, 55-56, 70-71, 73-74, 75-76
based on Dec-Jan Nino3.4 being less than -0.99C


Mar-May(0)
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Jun-Aug(0)
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Sep-Nov(0)
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Dec(0)-Feb(1)
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Mar-May(1)
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