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

Time Interval: Monthly
Time Coverage: 1870 to Nov 2016
Update Status: Periodically updated

Get Data:

Niño 1+2 (anomaly:1951-2000 mean removed) : Standard PSD Format (What is standard format?)
Niño 1+2: Standard PSD Format (What is standard format?)

Source:
Data is from PSD 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.

This page hosted by: NOAA ESRL Physical Sciences Division Document maintained by Cathy Smith (cathy.smith@noaa.gov) Updated: Mar 10, 2015 08:21:04 MDT http://www.esrl.noaa.gov/psd/gcos_wgsp/Timeseries/Nino12/index.html