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t - Regional Climate Group

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Example 1: cont……<br />

How to quantify of atmospheric circulation<br />

Circulation indices and weather typing based on the system by Lamb<br />

ξ<br />

6 circulation indices:<br />

U<br />

V<br />

u: west-east geostr. wind<br />

v: north-south geostr. wind<br />

W: total geostr. wind<br />

ξ u<br />

: westerly shear vorticity<br />

ξ v<br />

: southerly shear vorticity<br />

ξ: total vorticity<br />

(after Chen and Li, 2003)<br />

Göteborg University http://www.gvc2.gu.se/rcg <strong>Regional</strong> <strong>Climate</strong> <strong>Group</strong><br />

19

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