Difference between revisions of "Tropopause"

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<div class="definition"><div class="short_definition">The boundary between the [[troposphere]] and [[stratosphere]], usually characterized by  an abrupt change of [[lapse rate]].</div><br/> <div class="paragraph">The change is in the direction of increased atmospheric [[stability]] from regions below to regions  above the tropopause. Its height varies from 15 to 20 km (9 to 12 miles) in the [[Tropics]] to about  10 km (6 miles) in polar regions. In polar regions in winter it is often difficult or impossible to  determine just where the tropopause lies, since under some conditions there is no abrupt change  in lapse rate at any height. It has become apparent that the tropopause consists of several discrete,  overlapping &ldquo;leaves,&rdquo; a [[multiple tropopause]], rather than a single continuous surface. In general,  the leaves descend, step-wise, from the [[equator]] to the poles.</div><br/> </div>
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<div class="definition"><div class="short_definition">The boundary between the [[troposphere]] and [[stratosphere]], usually characterized by  an abrupt change of [[lapse rate]].</div><br/> <div class="paragraph">The change is in the direction of increased atmospheric [[stability]] from regions below to regions  above the tropopause. Its height varies from 15 to 20 km (9 to 12 miles) in the [[Tropics]] to about  10 km (6 miles) in polar regions. In polar regions in winter it is often difficult or impossible to  determine just where the tropopause lies, since under some conditions there is no abrupt change  in lapse rate at any height. It has become apparent that the tropopause consists of several discrete,  overlapping "leaves," a [[multiple tropopause]], rather than a single continuous surface. In general,  the leaves descend, step-wise, from the [[equator]] to the poles.</div><br/> </div>
 
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Latest revision as of 16:21, 20 February 2012



tropopause

The boundary between the troposphere and stratosphere, usually characterized by an abrupt change of lapse rate.

The change is in the direction of increased atmospheric stability from regions below to regions above the tropopause. Its height varies from 15 to 20 km (9 to 12 miles) in the Tropics to about 10 km (6 miles) in polar regions. In polar regions in winter it is often difficult or impossible to determine just where the tropopause lies, since under some conditions there is no abrupt change in lapse rate at any height. It has become apparent that the tropopause consists of several discrete, overlapping "leaves," a multiple tropopause, rather than a single continuous surface. In general, the leaves descend, step-wise, from the equator to the poles.