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.

This page hosted by: NOAA ESRL Physical Sciences Laboratory Document maintained by Cathy Smith (cathy.smith@noaa.gov) Updated: Apr 23, 2013 15:45:40 MDT http://psl.noaa.gov/gcos_wgsp/Timeseries/AO20thC/index.html