Thermal low: Difference between revisions

Revision as of 15:18, 20 February 2012

thermal low

(Or heat low.) An area of low atmospheric pressure near the surface resulting from heating of the lower troposphere and the subsequent lifting of isobaric surfaces and divergence of air aloft.

Thermal lows are common to the continental subtropics in summer; they remain stationary over the warm surface areas that produce them; their cyclonic circulation is generally weak and diffuse; they are nonfrontal.
Compare monsoon low.

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-<div class="definition"><div class="short_definition">(<br/>''Or'' heat low.) An area of low atmospheric [[pressure]] near the surface resulting from  heating of the lower [[troposphere]] and the subsequent lifting of [[isobaric surfaces]] and [[divergence]]  of air aloft.</div><br/> <div class="paragraph">Thermal lows are common to the continental [[subtropics]] in summer; they remain stationary  over the warm surface areas that produce them; their [[cyclonic circulation]] is generally weak and  diffuse; they are nonfrontal. <br/>''Compare'' [[monsoon low]].</div><br/> </div>
+<div class="definition"><div class="short_definition">(''Or'' heat low.) An area of low atmospheric [[pressure]] near the surface resulting from  heating of the lower [[troposphere]] and the subsequent lifting of [[isobaric surfaces]] and [[divergence]]  of air aloft.</div><br/> <div class="paragraph">Thermal lows are common to the continental [[subtropics]] in summer; they remain stationary  over the warm surface areas that produce them; their [[cyclonic circulation]] is generally weak and  diffuse; they are nonfrontal. <br/>''Compare'' [[monsoon low]].</div><br/> </div>
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