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Southern Oscillation Index (SOI) (NCEP)

Abstract: The University of Washington Joint Institute for the Study of the
Atmosphere and Ocean (JISAO) offers a Southern Oscillation Index (SOI)
dataset. The SOI is calculated from Tahiti and Darwin, Australia
Sea-Level Pressure (SLP) as follows (Chelliah, M., 1990, J. Climate,
3, 158-160 ):

SOI(month,year) = ( T(month,year) - D(month,year) )
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Related URL
Description: NOAA National Centers for Environmental Prediction Climate
Prediction Center home page.
Geographic Coverage
Spatial coordinates   
  N: -13.0   S: -13.0   E: 131.0   W: 131.0
  N: -18.0   S: -18.0   E: -150.0   W: -150.0
  N: -13.0   S: -18.0   E: -150.0   W: 131.0

Data Set Citation
Dataset Originator/Creator: NOAA/NCEP Climate Prediction Center
Dataset Title: Southern Oscillation Index (SOI) (NCEP)
Dataset Release Place: Seattle, Washington, USA
Dataset Publisher: Joint Institute for the Study of the Atmosphere and Ocean (JISAO)
Temporal Coverage
Start Date: 1882-01-01
Stop Date: 1996-04-30
Use Constraints Please cite the dataset originator if you use this data.
Ancillary Keywords
Data Set Progress
Distribution Media: Online (HTTP)
Distribution Format: ASCII
Fees: None
Phone: 301-602-3890
Fax: 301-614-5268
Email: Scott.A.Ritz at
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: Maryland
Postal Code: 20771
Country: USA
Chelliah, M. (1990), The global climate for June-August 1989: a season of near normal conditions in the tropical Pacific, J. Climate, 3, 158-160
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 1999-07-27
Last DIF Revision Date: 2016-01-27

Link to Web Site