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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