The figures below show the sea surface temperature (SST) weekly and monthly residuals (upper and middle plots, respectively) in the El Niño Southern Oscilation 4 (ENSO 4). The details of the monthly residuals for the last 3 to 4 years are shown in the lower panel.
The monthly residuals for each month is the difference between the mean SST for that specific month and the mean SST value for that month since January, 1985.
These time series are updated monthly.
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