Projection of monthly mean 1000 mb Height anomalies onto 1st EOF poleward of 20-degrees North. Values are normalized by the 1979-2000 period.

Time Interval: Monthly
Time Coverage: 1871 to 2010
Update Status: None

Get Data:

AO: Standard PSL Format (What is standard format?)

Source:
Data is from NOAA/ESRL PSL using data from the 20th Century Reanalysis. Method used to calculate timeseries follows that of NOAA/CPC's AO timeseries.
References:

1. Thompson, D. W. J, and J. M. Wallace, 1998: The Arctic Oscillation signature in the wintertime geopotential height and temperature fields. Geophys. Res. Lett., 25, 1297-1300.

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