Monday, May 21, 2012

Pollution in thunderclouds increases global warming


Pollution is leading thunderstorm clouds to capture heat, increasing global warming in a way that climate models have failed to take into account.
It strengthens them, causing their anvil-shaped tops to spread out high in the atmosphere and capture heat, especially at night, says Jiwen Fan of the Department of Energy's Pacific Northwest National Laboratory.
"Global climate models don't see this effect because thunderstorm clouds simulated in those models do not include enough detail," says Fan. "The large amount of heat trapped by the pollution-enhanced clouds could potentially impact regional circulation and modify weather systems."

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