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Earth Space Science

Global Warming Felt By Space Junk and Satellites 224

An anonymous reader writes in with a story about another side effect of increased carbon dioxide in the atmosphere. "Rising carbon dioxide levels at the edge of space are apparently reducing the pull that Earth's atmosphere has on satellites and space junk, researchers say. The findings suggest that man made increases in carbon dioxide might be having effects on the Earth that are larger than expected, scientists added... in the highest reaches of the atmosphere, carbon dioxide can actually have a cooling effect. The main effects of carbon dioxide up there come from its collisions with oxygen atoms. These impacts excite carbon dioxide molecules, making them radiate heat. The density of carbon dioxide is too thin above altitudes of about 30 miles (50 kilometers) for the molecules to recapture this heat. Cooling the upper atmosphere causes it to contract, exerting less drag on satellites."
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Global Warming Felt By Space Junk and Satellites

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