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Posted Sat Apr 23 2011: from Science News:
Salt clouds relieve some Arctic warming
Earth's warming in recent years has had an exaggerated impact in the Arctic. There, temperatures have soared relative to temperate areas, resulting in an increased summer melting of sea ice. But new research indicates that the local warming would be even more dramatic if it weren't for salt sprays kicked up by whitecaps from the Arctic's increasingly open waters. Snow and sea ice reflect much of the sun's warming rays back into space. As an increasing share of the Arctic Ocean's year-round cover of sea ice has disappeared, the sea surface has darkened -- or reduced its albedo -- and become an increasingly better absorber of solar energy. The open water starts to develop in spring and doesn't ice over again until fall. Year-round ice is ice that survives the summer...As expected, the salt clouds can exert a subtle cooling of the Arctic, the team reports online April 13 in Atmospheric Chemistry and Physics.
[Read more stories about: arctic meltdown, albedo effect, anthropogenic change, climate impacts, global warming]
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'Doc Jim says:
Hey, this gives me a geoengineering idea: zeppelin saltshakers!

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