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HOME > Climate & Weather Linkage > Teleconnections > Arctic Oscillation > Daily Geopotential Height Anomalies
 
Vertical Cross section of Geopotential Height Anomalies  Banner
 
Vertical Cross section of Geopotential Height Anomalies and AO index. Click on image to enlarge.
(Click on image to enlarge)
The daily geopotential height anomalies at 17 pressure levels are shown for the previous 120 days as indicated, and they are normalized by standard deviation using 1979-2000 base period. The anomalies are calculated by subtracting 1979-2000 daily climatology, and then averaged over the polar cap poleward of 65°N.

The blue (red) colors represent a strong (weak) polar vortex. The black solid lines show the zero anomalies.

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Page Author: Climate Prediction Center Internet Team
Page last modified: December 12, 2005
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