Chapter_3_notes - _ _ Chapter 3 Air Temperature and Air...

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Chapter 3 Air Temperature and Air Temperature Cycles ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Vertical Distribution of the Atmosphere ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ The Troposphere • Layer of the atmosphere in contact with the surface • Temperature decreases with height because the troposphere is heated from below (atmosphere is generally transparent to shortwave radiation) • Layer that contains all weather and all clouds • Extends to about 12 to 15 km; actual height varies with latitude and season (thicker as temperature increases) • Much water vapor and dust – from interactions with the surface • Contains about 80% of the mass of the atmosphere ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________
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The Tropopause • Small, isothermal layer above the troposphere • Isothermal – no temperature change with height • About 12 to 15 km in height – actual height varies with latitude and season ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ The Stratosphere • Layer of the atmosphere above the troposphere • Temperature increases with height because of absorption of ultraviolet light by ozone (O 3 ) • Extends up to about 50 km in height • Little exchange of air between troposphere and stratosphere – little dust or water vapor • Stable air layer – little vertical motions because of the increasing temperature with height -- inversion ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ The Stratopause • Small, isothermal layer above the stratosphere • Isothermal – no temperature change with height • About 50 km in height ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________
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The Mesosphere • Layer of the atmosphere above the stratosphere • Temperature decreases with height because of a
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This note was uploaded on 10/28/2009 for the course GEOG 101 taught by Professor Lavin during the Fall '08 term at University of Delaware.

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Chapter_3_notes - _ _ Chapter 3 Air Temperature and Air...

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