Skip Navigation Links www.nws.noaa.gov 
NOAA logo - Click to go to the NOAA home page National Weather Service   NWS logo - Click to go to the NWS home page
Climate Prediction Center
 
 

CPC Search
About Us
   Our Mission
   Who We Are

Contact Us
   CPC Information
   CPC Web Team

 
HOME > Monitoring and Data > Monitoring Weather & Climate > Indices and Forecasts > Daily Antarctic Oscillation Index > Daily Antarctic Oscillation Index
 
Monitoring Weather and Climate Banner
The daily AAO index is constructed by projecting the daily (00Z) 700mb height anomalies poleward of 20°S onto the loading pattern of the AAO.  Please note that year-round monthly mean anomaly data has been used to obtain the loading pattern of the AAO (Methodology).  Since the AAO has the largest variability during the cold sesaon, the loading pattern primarily captures characteristics of the cold season AAO pattern.

The daily AAO index and its forecasts using MRF and Ensemble mean forecast data are shown for the previous 120 days as indicated and they are normalized by standard deviation using 1979-2000 base period. A 3-day running mean is applied for the forecast indices.
 
Observations
Observed Daily Antarctic Oscillation Index.

  • Monthly mean AAO index since January 1979

NOAA/ National Weather Service
National Centers for Environmental Prediction
Climate Prediction Center
5200 Auth Road
Camp Springs, Maryland 20746
Climate Prediction Center Web Team
Page last modified: October 25, 2002
Disclaimer Privacy Policy