El Nino Regions 3 and 3.4 SST Indices from NCAREntry ID: NCAR_SST_ENSO
Abstract: These data constitute Nino Region 3 and Nino Region 3.4 SST anomalies
(indices) in degrees Celsius which are discussed and appear as figures
in Trenberth (1997). The Nino 3 Region is bounded by 90W-150W and 5S-
5N. The Nino 3.4 Region is bounded by 120W-170W and 5S- 5N.
Monthly means were computed for each time series for the period
1950-1979. These means were then subtracted from their respective time
series for the entire data set (1950-1998). Finally, a five-month
running mean was applied to each time series.
The data is at
The raw SST data is from the NOAA Climate Prediction Center at:
(Click for Interactive Map)
Data Set Citation
Dataset Originator/Creator: Trenberth, K.
Dataset Title: Nino Region 3 and Nino Region 3.4 SST Indices
Dataset Release Date: 1997
Dataset Release Place: Boulder, CO
Dataset Publisher: NCAROnline Resource: http://www.cgd.ucar.edu/cas/catalog/climind/Nino_3_3.4_indices.html
Start Date: 1950-01-01
Temporal Resolution: monthly
Data Set Progress
Distribution Media: Online
Distribution Format: ASCII
Trenberth, K.E. 1997. The Definition of El Nino. Bulletin of the
American Meteorological Society, 78, 2771-2777.
Creation and Review Dates
Last DIF Revision Date: 2003-10-24