Global warming disrupts natural patterns of glaciation

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http://www.khaleejtimes.com/DisplayArticle08.asp?xfile=data/environment/2012/January/environment_January14.xml&section=environment

(IANS)

10 January 2012

WASHINGTON - Unprecedented levels of greenhouse gases are disrupting normal patterns of glaciation, setting back the process of the earth’s cooling as it did in its prehistoric past. snip

Current levels of carbon dioxide (CO2) are trapping too much heat in the atmosphere to allow the earth to cool as it has in its prehistoric past in response to changes in Earth’s orbital pattern.

Over the past million years, the earth’s CO2 levels, as recorded in ice core samples, have never reached more than 280 parts per million in the atmosphere. “We are now at 390 parts per million,” Channell said. The sudden spike has occurred in the last 150 years.

”We haven’t seen this high concentration of greenhouse gases in the atmosphere for several million years,” Channell said. “All bets are off.”