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气象:2008,34(6):74-80
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070729特大暴雨的地闪特征与降水相关分析
(1.山西省气象台,太原 030006;2.山西省气象局;3.河南省气象台;4.山西省垣曲县气象局)
The Correlation Analysis between Cloud to ground Lightning Character and Precipitation of 070729 Super Rainstorm
(1.Shanxi Meteorological Observatory, Taiyuan 030006;2.Shanxi Meteorological Bureau;3.Henan Meteorological Observatory;4.Yuanqu Meteorological Office)
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投稿时间:2008-01-11    修订日期:2008-02-26
中文摘要: 利用闪电定位每分钟的实测资料、加密雨量站每分钟的雨量资料,以及卫星云图资料,对20 07年7月29—30日,山西南部产生的特大暴雨的地闪特征进行了综合分析。发现:地闪出 现在500hPa的5840gpm与5880gpm之间、TBB≤-43℃的区域内;低空急流左侧3个经距、700hP a暖切变南侧2~3个纬距所围区域与TBB≤-63℃的区域或云团南部TBB水平梯度的大值区 相叠合的区域是地闪的高频数区和密集区,该区域与暴雨落区有较好的对应关系;3个中 β尺 度对流云团和1个MCC是导致特大暴雨产生的主要对流系统。分析结果表明:两个中尺度云团 合并的时刻是闪电频次更高的时刻,两个中尺度云团合并的地点是闪电频次更高更密集、降 水更强的区域;利用单站每分钟的地闪累积数以及与加密雨量站每分钟雨量的关系,可以识 别中 γ尺度对流系统,遥测小尺度强降水,提前35~40分钟预测雨强峰值的到来;只有在 有利的高低层系统配置下,局地地闪频数与雨强随时间的变化才有很好的相关性。
中文关键词: 特大暴雨  地闪特征  相关分析
Abstract:With the real time data minutely measured by the lightning locator, and the pre cipitation data minutely measured from the encrypted precipitation station, as w ell as the satellite cloud picture, the cloud to ground lightning character in a super rainstorm occurred in the south of Shanxi on July 29-30, 2007 was anal yzed. The results show that the cloud to ground lightning appeared in the area of 500hPa, between 5840gpm and 5880gpm, and TBB≤-43℃. The areas surrounded by 3 longitude distance, the left side of low jet flow, and 2 - 3 latitude distance, the south side of 700hPa warm shear, enclosed by the area o f TBB≤-63℃ or the south of cloud cluster, big value zone of TBB horizontal gra ds, are the high frequency and dense areas of the cloud to ground lightning. T here is a good correspondence between these areas and rainstorm falling area. T hree meso βscale convective cloud cluster and one MCC are the main convective systems, which resulted in the super rainstorm. The analysis result indicates t hat the time when a couple of meso βscale cloud cluster incorporates is the t ime when the frequency of lightning is higher. The position where a couple of me so βscale cloud cluster incorporates is the area where the frequency of light ning is higher and the precipitation is stronger. There is a good relationship b etween the minutely cumulated number of cloud to ground lightning from single station and the minute precipitation from the encrypted precipitation station. I t can be used to identify meso γ scale convective system, remotely survey smal l scale strong precipitation, and forecast the coming of rain intensity peak val ue ahead of 35 40 minutes. Only in favorable allocation of upper and lower air system configuration, there will be a perfect correspondence between the local c loud to ground lightning frequency and rain intensity change along with time.
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基金项目:山西省科技攻关项目“山西省中短期气象灾害预警系统”(041088)资助。
引用文本:
苗爱梅,贾利冬,吴蓁,张娄平,2008.070729特大暴雨的地闪特征与降水相关分析[J].气象,34(6):74-80.
Miao Aimei,Jia Lidong,Wu Zhen,Zhang Louping,2008.The Correlation Analysis between Cloud to ground Lightning Character and Precipitation of 070729 Super Rainstorm [J].Meteor Mon,34(6):74-80.