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Monday, February 23, 2009

Cool Geo-Pic: Stratosphere Influences Winter Weather

Another Cool Geo-Pic from NASA's Earth Obervatory, Stratosphere Influences Winter Weather

The video compares wind & weather inter-dependence at different elevations. A nice parallel of what "happens below begins from above".

Quick "Cut & Paste" Highlights:

" ...The lower pair of images represent the air mass, or polar vortex, that controls the wind pattern. Essentially, the winds are strongest at the edge of the polar vortex (where the pressure difference between the air masses is greatest). The area of red in the lower left image represents polar air that typically sits over the Arctic during January.

In general, strong winds circle the red regions, or areas of high vorticity, in a counterclockwise direction. These winds, moving at speeds well above 100 miles per hour, influence winds and weather patterns closer to Earth’s surface. Their influence means that weather in England and Western Europe typically comes from the west. Over England, western winds blow in ocean air warmed by the Atlantic Gulf Stream.... "

Full Article - Click Here


References / Credits:
Full Credit to NASA's Earth Observatory. Data provided by the Goddard Modeling and Assimilation Office, courtesy of Paul Newman. Caption by Holli Riebeek with information provided by Paul Newman.

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