Friday, January 29, 2010

Ice Age 630 Million Years Ago with Higher Levels of CO2 than Today

From The Telegraph (UK): A warm atmosphere rich in carbon dioxide may have surrounded the Earth in an ancient ice age, new research has suggested. Researchers at the University of Birmingham found that 630 million years ago the earth had a warm atmosphere full of carbon dioxide but was completely covered with ice. The scientists studied limestone rocks and found evidence that large amounts of greenhouse gas coincided with a prolonged period of freezing temperatures. Explanation at website of lead author.

and see here

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