Datasets / Climate Prediction Center (CPC) Monthly North Atlantic Oscillation (NAO) teleconnection index

Climate Prediction Center (CPC) Monthly North Atlantic Oscillation (NAO) teleconnection index

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Published By National Oceanic and Atmospheric Administration, Department of Commerce

Issued over 9 years ago

US
beta

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

Monthly tabulated index of the North Atlantic Oscillation (NAO) teleconnection pattern. The data spans the period 1950 to present. The index is derived from a rotated principal component analysis (RPCA) of normalized 500-hPa height anomalies from the period 1950-2000. The data source is the NCEP/NCAR Reanalysis. The resulting time series is then re-normalized to coincide with the 1981-2010 base period monthly means. The index is updated monthly. Calculating the NAO index using the RPCA approach is a somewhat complicated process, in that the NAO index is not derived independently of the other extra tropical teleconnection pattern indices.

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