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Ice Reveals Climate History

Research offers window into changes

By Kate Rockwood,  Newser Staff

Posted Aug 3, 2008 12:19 PM CDT

(Newser) – Over the next three summers in Greenland, a group of international scientists will unearth samples of the country’s ice core down to its very bedrock, in the hopes of painting a complete picture of Earth's changing climate. Each layer provides a dated mixture of water and air bubbles that were trapped in the snow, Thomas L. Friedman writes in the New York Times.

Those bubbles can give scientists such information as what the temperature was, and the amount of greenhouse gases in the atmosphere. So far, the samples reveal a complex system capable of drastic and sudden change. But that doesn't absolve humans, Friedman notes. We shouldn't be contributing to climate change, because we could "tip the balance."

An iceberg melts in circular patterns in Kulusuk Bay, eastern Greenland, Tuesday July 17, 2007.
An iceberg melts in circular patterns in Kulusuk Bay, eastern Greenland, Tuesday July 17, 2007.   (AP Photo/John McConnico)
A lone fisherman navigates a perilous path back to port through the melting ice field in Greenland.
A lone fisherman navigates a perilous path back to port through the melting ice field in Greenland.   (Magnum Photos)
The Jakobshavn Glacier, which is receding and thinning at a dramatic pace. Glaciers preserve the history of Earth's climate.
The Jakobshavn Glacier, which is receding and thinning at a dramatic pace. Glaciers preserve the history of Earth's climate.   (Magnum Photos)
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