Tuesday, March 06, 2007

Asian air pollution affecting weather

Asia's growing air pollution — billowing plumes of soot, smog and wood smoke — is making the Pacific region cloudier and stormier, disrupting winter weather patterns along the West Coast and into the Arctic, researchers reported Monday.

Carried on prevailing winds, the industrial outpouring of dust, sulfur, carbon grit and trace metals from booming Asian economies is having an intercontinental cloud-seeding effect, the researchers reported in the Proceedings of the National Academy of Sciences.

The study is the first large-scale analysis to draw a link between Asian air pollution and the changing Pacific weather patterns.

"The pollution transported from Asia makes storms stronger and deeper and more energetic," said lead author Renyi Zhang at Texas A&M University. "It is a direct link from large-scale storm systems to [human-produced] pollution."

Satellite measurements reveal that high-altitude storm clouds over the northern Pacific have increased up to 50% over the last 20 years as new factories, vehicles and power plants in China and India spew growing amounts of microscopic pollutant particles into the air.
from the LA Times

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