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ionosphere |
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ionosphereIonized layer of Earth's outer atmosphere (60–1,000 km/38–620 mi) that contains sufficient free electrons to modify the way in which radio waves are propagated, for instance by reflecting them back to Earth. The ionosphere is thought to be produced by absorption of the Sun's ultraviolet radiation. The British Antarctic Survey estimates that the ionosphere is decreasing at a rate of 1 km/0.6 mi every five years, based on an analysis of data from 1960 to 1998. Global warming is the probable cause. 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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Czernohorsky Czerny, Carl Czerwenka, Oscar Cziffra, György Czolgosz, Leon Czyz, Henryk D D layer D'Abernon, Edgar Vincent D'Amboise, Jacques D'Annunzio, Gabriele D'Anville, Jean Baptiste Bourguignon D'Aquino, Iva Ikuko Toguri d'Arblay, Madame D'Argenlieu, Georges Thierry |
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