Columbia University

Southwest headed for permanent drought

(PhysOrg.com) -- The American Southwest has seen naturally induced dry spells throughout the past, but now human-induced global warming could push the region into a permanent drought in the coming decades, ...

dateJan 31, 2011 in Earth Sciences
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Volcanoes have shifted Asian rainfall

Scientists have long known that large volcanic explosions can affect the weather by spewing particles that block solar energy and cool the air. Some suspect that extended "volcanic winters" from gigantic blowups ...

dateNov 03, 2010 in Earth Sciences
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Tackling an Ice Age mystery

In the northern hemisphere, ice sheets ebb and flow in 100,000-year cycles, driven by varying amounts of sunlight falling on Earth's surface as its orbit and orientation toward the sun changes. But astronomical variations ...

dateSep 05, 2013 in Earth Sciences
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