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29 January 2009
By Elizabeth Grossman For The Daily Climate
Curbing air pollution across the Northern Hemisphere can slow the Arctic's unprecedented thaw, researchers say.
The quickest way to curb Arctic melting now underway may be to turn off the tap of short-lived pollutants swirling north from cities and industry far to the south, say scientists at the U.S. National Oceanic and Atmospheric Administration.
Preliminary data suggest that these pollutants can increase Arctic surface temperatures as much as three degrees – an effect equal to what scientists expect from carbon dioxide and other greenhouse gases. But unlike carbon dioxide, these pollutants accumulate seasonally and dissipate far more quickly than carbon dioxide, suggesting that reducing these emissions represents one of the best hopes for staving off further unprecedented retreats of Arctic sea ice. More here ...
