| 单词 | upper atmosphere |
| 释义 | upper atmosphereSEE SYNONYMS FOR upper atmosphere ON THESAURUS.COM noun Meteorology.the portion of the atmosphere above the troposphere. Compare upper air. Origin of upper atmosphereFirst recorded in 1890–95 Words nearby upper atmosphereupper, upper air, upper airway, Upper Arlington, upper arm, upper atmosphere, Upper Austria, upper bound, Upper Canada, Upper Canadian, Upper Carboniferous Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for upper atmosphereupper atmosphere nounmeteorol that part of the atmosphere above the troposphere Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for upper atmosphereupper atmosphere The part of the atmosphere above the troposphere. The upper atmosphere includes the mesosphere, the ionosphere, the thermosphere, and the exosphere. Temperatures in the upper atmosphere decrease with increasing altitude except in the thermosphere, where temperatures increase significantly with altitude, because the few molecules present receive intense solar radiation. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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