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The distribution of wet-bulb potential temperature in four selected cyclones

✍ Scribed by A. M. Firesah

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
684 KB
Volume
65
Category
Article
ISSN
0035-9009

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✦ Synopsis

Abstract

The distribution of wet‐bulb potential temperature has been investigated in four cyclones, each by means of serial sounding balloon ascents made at one station. The results are plotted as though they represented observations along a vertical cross‐section through the moving cyclone. Lines of equal wet‐bulb potential temperature are drawn, and these are found to show a characteristic form of distribution at warm fronts, cold fronts and occlusions. At warm fronts the lines are closely crowded together. At cold fronts they show a nose raised some kilometres above the ground, the wet‐bulb potential temperature decreasing with height in the air below the nose. The air in this region usually shows marked latent instability capable of being realised after only relatively small upward displacement. At occlusions the lines of equal wet‐bulb potential temperature have a pronounced V‐shaped form.

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