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thermosphere |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.03 sec. |
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thermosphere [′thər·mə‚sfir] (meteorology) The atmospheric shell extending from the top of the mesosphere to outer space; it is a region of more or less steadily increasing temperature with height, starting at 40 to 50 miles (70 to 80 kilometers); the thermosphere includes, therefore, the exosphere and most or all of the ionosphere. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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It is the major energy source in the stratosphere and thermosphere and thus determines the upper atmosphere's temperature, structure, composition, and dynamics. These simple models forecast that the thermosphere will chill by 50[degrees]C with a doubling in the atmospheric concentration of carbon dioxide, expected sometime in the next century. TIMED, which stands for Thermosphere, Ionosphere, Mesosphere, Energetics and Dynamics, is studying the influences of the sun and humans on the least explored and understood region of Earth's atmosphere -- the mesosphere and lower thermosphere/ionosphere (MLTI). |
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