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
 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
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR
GEOGRAPHIC REGION > SOUTHERN HEMISPHERE


Data Resolution
Temporal Resolution: monthly mean


Science Keywords
ATMOSPHERE >ALTITUDE >GEOPOTENTIAL HEIGHT    [Definition]
ATMOSPHERE >ATMOSPHERIC PRESSURE >OSCILLATIONS >ANTARCTIC OSCILLATION INDEX    [Definition]
ATMOSPHERE >ATMOSPHERIC PRESSURE >PRESSURE ANOMALIES    [Definition]
CLIMATE INDICATORS >ATMOSPHERIC/OCEAN INDICATORS >TELECONNECTIONS >ANTARCTIC OSCILLATION >AAO    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Keywords
AAO
Antractic Oscillation Index
climate index
climate indices
Southern Hemisphere Annular Mode
Southern Annular Mode
SAM
polar vortex
atmospheric circulation
climate change


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    [Information]
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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