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Record Search Query: [Keyword='Climate Change']
Daily Antarctic Oscillation Index (AAO)

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Abstract: [Source: NOAA Climate Prediction Center, ]

The daily Antarctic Oscillation (AAO) index is constructed by projecting the daily (00Z) 700mb height anomalies poleward of 20S onto the loading pattern of the AAO.

The daily AAO index and its forecasts using MRF and Ensemble mean forecast data are available for the previous 120 days and they are normalized by standard deviation using 1979-2000 base period. A 3-day running mean is applied for the forecast indices.

The monthly mean AAO index is available from January 1979 to the present.
Related URL
Description: Access to AAO documentation, current graphs and data

Description: Access to AAO monthly means since 1979.
Geographic Coverage
Spatial coordinates   
  N: -20.0   S: -90.0   E: 180.0   W: -180.0
Min Altitude: 0 MB Max Altitude: 700 MB

Data Set Citation
Dataset Originator/Creator: NOAA/NWS/CPC
Dataset Title: Daily Antarctic Oscillation Index
Dataset Series Name: NOAA/NWS/CPC Indices and Forecasts
Dataset Release Date: ongoing
Dataset Release Place: Camp Springs, MD
Dataset Publisher: NOAA National Weather Service, Center for Climate Prediction
Online Resource:
Temporal Coverage
Start Date: 1979-01-01
Data Resolution
Temporal Resolution: monthly mean
Temporal Resolution Range: Monthly - < Annual
RADIOSONDES Ancillary Description
Data Set Progress
Originating Center
Distribution Media: online www
Distribution Format: ascii
Fees: none
Email: Ed.Olenic at
Creation and Review Dates
DIF Creation Date: 2003-02-10
Last DIF Revision Date: 2017-08-23

Link to NASA website
Responsible NASA Official:   Stephen Berrick
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