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Antarctic Oscillation (AO) Time Series Data since 1948 from JISAO
Entry ID: JISAO_AAO

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Summary
Abstract: The Antarctic Oscillation (AAO) is the dominant pattern of non-seasonal tropospheric circulation variations south of 30S, and it is characterized by pressure anomalies of one sign centered in the Antarctic and anomalies of the opposite sign centered about 40-50S. The AAO is also referred to as the Southern Annular Mode (SAM).

The AAO is defined as the leading principal component (PC) of 850 hPa geopotential height anomalies south of 30S (Thompson and Wallace 2000). For more information on the construction and analyses of this data, see: http://www.jisao.washington.edu/data/aao/
Related URL
Link: GET DATA
Description: Access to AAO documentation, graphs, and data.

Link: GET DATA
Geographic Coverage
(Click for Interactive Map)
Spatial coordinates   
  N: -30.0   S: -90.0   E: 180.0   W: -180.0
Min Altitude: 0 MB Max Altitude: 850 MB

Data Set Citation
Dataset Originator/Creator: T. Mitchell
Dataset Title: Antarctic Oscillation (AO) Time Series
Dataset Release Date: 2002
Dataset Release Place: Seattle, WA
Dataset Publisher: JISAO, University of Washington
Online Resource: http://www.jisao.washington.edu/data/aao/
Temporal Coverage
Start Date: 1948-01-01
Location Keywords
Data Resolution
Temporal Resolution: monthly mean
Temporal Resolution Range: Monthly - < Annual
Science Keywords
ISO Topic Category
Ancillary Keywords
Data Set Progress
IN WORK
Originating Center
JISAO
Data Center
Center for Science in the Earth System, Joint Institute for the Study of the Atmosphere and Ocean, Department of Atmospheric Sciences, University of Washington Supplemental Info
Data Center URL: http://www.cses.washington.edu/

Data Center Personnel
Name: TODD MITCHELL
Email: mitchell at atmos.washington.edu
Distribution
Distribution Media: online www
Distribution Format: ascii
Fees: none
Personnel
TODD MITCHELL
Role: TECHNICAL CONTACT
Email: mitchell at atmos.washington.edu
Publications/References
Thompson, D. W. J., and J. M. Wallace, 2000: Annular modes in the extratropical circulation. Part I: Month-to-month variability. J. Climate, 13, 1000-1016.

Thompson, D. W. J., and S. Solomon, 2002: Interpretation of Recent Southern Hemisphere Climate Change. Science, 296, 895-899.
Creation and Review Dates
DIF Creation Date: 2003-02-10
Last DIF Revision Date: 2012-01-31

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