Calculated from the HadISST. It is the area averaged SST from 0-10S and 90W-80W.

Time Interval: Monthly
Time Coverage: 1870 to Sep 2021
Update Status: Periodically updated

Get Data:

Niño 1+2 (anomaly:1981-2010 mean removed) : Standard PSL Format (What is standard format?)
Niño 1+2: Standard PSL Format (What is standard format?)

Source:
Data is from PSL using the HadISST1 dataset.
References:

1. Rayner N. A., D. E. Parker, E. B. Horton, C. K. Folland, L. V. Alexander, D. P. Rowell, E. C. Kent, A. Kaplan, Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century, J. Geophys. Res., 108 (D14), 4407, doi:10.1029/2002JD002670, 2003.

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