El Niño-Southern Oscillation Then and Now

Again 1883 comes up. Hmm.

Bob Tisdale - Climate Observations

I’m presenting this for those who look for patterns. I see it only as a curiosity—nothing more.  I am not suggesting that future ENSO events will mimic those of the past, but…

El Niño-Southern Oscillation indices are used to monitor the strength, frequency and duration of El Niño and La Niña events. One of the commonly used indices is the sea surface temperature anomalies of an area in the east-central equatorial Pacific called the NINO3.4 region (5S-5N, 170W-120W). A blogger recently advised me in a comment of a curious agreement in the NINO3.4 data for two periods separated by more than 100 years. Thanks, Bob.  That is, the sea surface temperature anomalies of the NINO3.4 region for the period of January 2004 to March 2013 are quite similar to those from January 1883 to March 1892. Refer to Figure 1, which presents NINO3.4 anomaly data for the two periods…

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