Position: Home > Articles > Mesoscale Analysis of a "Dry" Convective Windstorm
Arid Zone Research
2009,26
(2)
282-286
一次“干”对流风暴的中尺度分析
作 者：
武麦凤;安中浩;王旭仙
单 位：
陕西省渭南市气象局
关键词：
干风暴;高、低空急流;次级环流;中尺度涡旋;陕西省
摘 要：
通过对2007年7月24日发生在陕西省的一次"干"对流风暴过程的分析,发现这次对流性风暴有2个主要特点:①风暴区的水汽输送和辐合均比较弱;②风暴发生在高空急流入口区内和低空急流轴左前方3~5个纬距内。高、低空急流耦合激发了急流次级环流的产生和发展,急流次级环流对风暴又产生了正反馈作用;地面中尺度涡旋是由急流次级环流上升支引起的。
译 名：
Mesoscale Analysis of a "Dry" Convective Windstorm
作 者：
WU Mai-feng, AN Zhong-hao, WANG Xu-xian(Weinan Meteorological Bureau,Weinan 714000,China)
关键词：
Dry windstorm;high and low jet;secondary circulation;mesoscale vortex;Shaanxi province.
摘 要：
In this study,a mesoscale analysis of a "dry" convective windstorm that occurred in Shaanxi Province on July 24,2007 was conducted.The preliminary results were as follows: The vapor transfer and convergence over the windstorm area were weak.The windstorm occurred in the area under the upper-level jet stream within 3 to 5 latitudes left forward of the axis of the low altitude jet stream.The formation and development of the jet secondary circulation were excited by the coupling of the upper-level and low altitude jet streams,and the jet secondary circulation provided positive feedback to the windstorm.The circulation provided a strong impetus to the continuing uplift force that induced the strong convective weather,and the "Dry" convective windstorm occurred in a rapid rise in a subbranch of the circulation.The rising branch of the Jet secondary circulation resulted in a surface mesoscale vortex.
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