Trenberth Southern Oscillation Index (SOI) from NCAR
Entry ID: NCAR_SOI

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Summary
Abstract: The Southern Oscillation Index (SOI) at NCAR is computed using monthly
mean sea level pressures at Tahiti (T) and Darwin (D). The SOI [T-D]
is an optimal index that combines the Southern Oscillation into one
series. These SOI values are slightly different than those calculated
by the Climate Prediction Center (http://www.cpc.ncep.noaa.gov/) due
to the normalization used. The [T+D] series is a measure of small
scale and/or transient phenomena that are not part of the large scale
Southern Oscillation.

To access the SOI data at NCAR, see:
http://www.cgd.ucar.edu/cas/catalog/climind/soi.html
or
ftp://ftp.cgd.ucar.edu/pub/shea/soi_dir/
Related URL
Description: SOI data from the NOAA Climate Prediction Center
Geographic Coverage
Spatial coordinates   
  N: -12.0   S: -17.0   E: -149.0   W: 131.0

Data Set Citation
Dataset Originator/Creator: Trenberth, K.
Dataset Title: Southern Oscillation Index (SOI)
Dataset Series Name: Southern Oscillation Index (SOI)
Dataset Release Place: Boulder, CO
Dataset Publisher: NCAR
Online Resource: http://www.cgd.ucar.edu/cas/catalog/climind/soi.html
Temporal Coverage
Start Date: 1882-01-01
Location Keywords
Data Resolution
Temporal Resolution: monthly
Quality The SOI values prior to 1935 should be used with caution. There are
questions regarding the consistency and quality of the Tahiti pressure
values prior to 1935. Perhaps a better estimate of the SOI prior to
1935 is the normalized Darwin pressure anomaly series.
Data Set Progress
IN WORK
Originating Center
Data Center
Climate and Global Dynamics Division, National Center for Atmospheric Research, University Corporation for Atmospheric Research Supplemental Info
Data Center URL: http://www.cgd.ucar.edu/

Data Center Personnel
Name: CLIMATE AND GLOBAL DYNAMICS DIVISION
Phone: 303.497.1740
Email: cwimert at cgd.ucar.edu
Contact Address:
National Center for Atmospheric Research
P.O. Box 3000
City: Boulder
Province or State: CO
Postal Code: 80307-3000
Country: USA
Distribution
Distribution Media: Online, ftp
Distribution Format: ASCII
Fees: None
Personnel
Role: DIF AUTHOR
Email: gsfc-gcmduso at mail.nasa.gov
View entire list
Publications/References
K. Trenberth (1984), Signal versus Noise in the Southern Oscillation,
Monthly Weather Review 112:326-332
Extended Metadata Properties
(Click to view more)

Creation and Review Dates
Last DIF Revision Date: 2003-12-05
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