Comparison Analysis of South China Front and WarmArea Heavy Rain Systems in June 2006
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Abstract:
A continuous heavy rain process occurred in South China from 17 to 24 June 2006, during which there existed two rainbands, one in the north and the other in the south. The north rainband (over the north and central part of Fujian Province) was resulted from frontal systems and the south rainband (over the east and central part of Guangdong Province) was in the warm areas before a front. The double rainband phenomenon has attracted much attention of Chinese meteorologists. In order to investigate the causes of frontal and warmarea heavy rains and deepen the knowledge of the two kind heavy rains, the heavy rain case is analyzed in details as a typical example of the double rainband event with hourly surface rainfall and 6hour NCEP reanalysis data. The main physical differences between the frontal and warmarea heavy rains are revealed. It is found that there exist obvious differences not only in the mesoscale rain mass activities, dynamic structure, instability mechanisms, and vertical heating profiles between Meiyu front and warmarea heavy rain systems, but also in the moisture transportation, mesoscale environment and vertical circulation related to heavy rainfall. These differences may be the reason why the heavy rainfall in warm areas before a front is difficult to simulate and forecast.
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Clc Number:
P434 P457.6
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.