National Weather Service Climate Prediction Center

noaa-cpc-tcon-mly-ao-v2006

Climate Prediction Center Monthly(CPC)Arctic Oscillation Index

The Arctic Oscillation (AO) is a leading teleconnection pattern in the Northern Hemisphere circulation. It is calculated as the first Empirical Orthogonal Function (EOF) for height anomalies poleward of 20 degrees latitude for the Northern Hemisphere. The goal of the EOF procedure is to capture the maximum amount of explained variance in the circulation fields.

http://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/monthly.ao.index.b50.current.ascii

The spatial range for this dataset is 20.0° to 90.0° latitude, and -180.0° to 180.0° longitude. map (center)

Also known as :

• identifier 050570b3-7e18-40be-9d05-2418486afc86 (datagov lexicon)
• dataset climate-prediction-center-monthlycpcarctic-oscillation-index (datagov lexicon)