This plot displays three-month running average time series of warm water volume across the east-central equatorial Pacific Ocean based upon the standardized anomalous depth of the equatorial Pacific thermocline, and the standardized NINO3.4 sea surface temperature anomaly from 1982 to present.
The red time series plot represents warm water volume (WWV) across the east-central equatorial Pacific Ocean, given as the three-month running average of the standardized anomalous depth of the east-central equatorial Pacific thermocline, as indicated by the depth of water above the 20°C potential temperature isotherm averaged over the region 5°S to 5°N and 160°W to 120°W. The 20°C potential temperature isotherm depth anomalies are calculated with respect to the 1982-present base period and standardized over the same period. The black trace is the three-month running average of the standardized NINO 3.4 sea surface temperature anomaly. The sea surface temperature anomalies are calculated with respect to the 1971-2000 base period and standardized over the 1982-present period.
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