Monday, July 23, 2007

 

China’s Massive Dam Changing Weather

‘Two years before its completion, the world’s largest dam is already changing the local weather, say scientists studying the Three Gorges Dam on China’s Yangtze River. Both modeling and actual meteorological data suggest that the reservoir is cooling its valley, which is causing changes in rainfall. [..]

Among the surprise weather changes has been the increase in rainfall between the Daba and Oinling mountains, said Wu.

The rains come from a “lake effect” intensification of precipitation, like that seen around the Great Lakes of North America. The lake effect happens when already moist air picks up more moisture as it crosses over a warm body of water, then rains or snows it out quickly upon reaching the shore.’




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