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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

Link: View Related Information
Description: SOI data from the NOAA Climate Prediction Center

Geographic Coverage

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

OCEAN > PACIFIC OCEAN

Data Resolution
Temporal Resolution: monthly

Science Keywords

ATMOSPHERE >ATMOSPHERIC PRESSURE >DIFFERENTIAL PRESSURE    [Definition]

ATMOSPHERE >ATMOSPHERIC PRESSURE >OSCILLATIONS    [Definition]

ATMOSPHERE >ATMOSPHERIC PRESSURE >PRESSURE ANOMALIES    [Definition]

ATMOSPHERE >ATMOSPHERIC PRESSURE >SEA LEVEL PRESSURE    [Definition]

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Platform

GROUND STATIONS [Information]

Project

ESIP >Earth Science Information Partners Program [Information]

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.

Keywords

CLIMATE INDEX

CLIMATE INDICES

SLP

SOI

Data Set Progress

IN WORK

Originating Center

NCAR

Data Center

Climate and Global Dynamics Division, National Center for Atmospheric Research, University Corporation for Atmospheric Research [Information]
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

GENE R. MAJOR
Role: DIF AUTHOR
Email: gsfc-gcmduso at mail.nasa.gov

KEVIN TRENBERTH
Role: INVESTIGATOR
Email: trenbert at 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

Publications/References

K. Trenberth (1984), Signal versus Noise in the Southern Oscillation,
Monthly Weather Review 112:326-332

Creation and Review Dates

Last DIF Revision Date: 2003-12-05

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