| 四川盆地地闪与对流性降水和雷达回波的关系 |
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| 引用本文： | 范江琳,马力,青泉.四川盆地地闪与对流性降水和雷达回波的关系[J].气象科技,2014,42(1):118-124. |
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| 作者姓名： | 范江琳 马力 青泉 |
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| 作者单位： | 1 成都信息工程学院，成都 610225; 2 四川省气象台，成都610072;四川省气象局，成都610072;四川省气象台，成都610072 |
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| 基金项目： | 四川省气象局气象行业专项“滑坡泥石流”(GYHY201006040)资助 |
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| 摘 要： | 利用ADTD型闪电观测资料、SWAN拼图资料及成都CINRAD/SC多普勒天气雷达数据,对2009—2011年12次区域性大暴雨过程中的100个地闪、强降水个例和雷达回波的特征及时间关系进行了统计分析。结果表明:负地闪频数和降水强度随时间的变化较一致,有单峰、多峰的特征;负地闪频数越高,出现强降水的可能性越大;持续性强降水开始之前6~30min,83%的事件伴随有负地闪频数突增并持续性增长的现象,56%的事件有负地闪频数峰值出现,地闪频数突增对持续性强降水的开始有较好的指示意义;负地闪频数峰值出现之后的6~30min,67%的事件有出现降水量峰值,负地闪频数峰值的出现可预示雨强峰值的迅速到来;此外,在强回波移动方向的前方常伴有弱的负地闪活动,负地闪活动主要集中在35dBZ以上的强回波区,且移向与强回波的移动方向较一致。
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| 关 键 词： | 负地闪频数 持续性强降水 雷达回波 |
| 收稿时间： | 2012/10/25 0:00:00 |
| 修稿时间： | 2013/3/21 0:00:00 |
Relationship between Cloud-to-Ground Lightning,Convective Precipitation and Radar Echo in Sichuan Basin |
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| Fan Jianglin,Ma Li and Qing Quan.Relationship between Cloud-to-Ground Lightning,Convective Precipitation and Radar Echo in Sichuan Basin[J].Meteorological Science and Technology,2014,42(1):118-124. |
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| Authors: | Fan Jianglin Ma Li and Qing Quan |
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| Institution: | Fan Jianglin Ma Li Qing Quan (1 Chengdu University of Information Technology, Chengdu 610225; 2 Sichuan Meteorological Service, Chengdu 610072 3 Sichuan Meteorological Service, Chengdu 610072) |
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| Abstract: | By utilizing the ADTD lightning observations, SWAN radar mosaics and CINRAD/SC Doppler radar data of Chengdu, an analysis is made of the characteristics of and relationship between CG （cloud-to- ground） lightning, strong precipitation and radar echoes of 100 cases in the 12 regional heavy rainfall events in 2009--2011. The results indicate that the frequency of negative flashes changes with time as precipitation intensity does, and there are single and multiple peaks. The higher the frequency of negative CG lighting is, the greater the likelihood of heavy precipitation occurrence is. During 83 % of heavy rainfall events, about 6 to 30minutes before the persistent heavy rainfall, the frequencies of negative flashes increase suddenly and continuously, and during 56% of the events, there appears a peak of negative CG lightning. The sudden increasing of CG lightning frequency is a good indicator of heavy rainfall. During 67% of heavy rainfall events, about 6 to 30 minutes after the appearing of precipitation intensity peaks, there appears a peak of negative CG lightning. In the front of strong radar echoes, there occur weak negative flashes, mainly concentrated in the region above 35 dBz and moving along with radar echoes. |
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| Keywords: | negative CG lightning persistent heavy precipitation radar echo |
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