摘要
利用湖北新一代多普勒雷达、闪电定位仪、电场仪等探测设备获取的大气探测资料,采取概率统计方法,就武汉市2012年1月至2014年7月184次雷暴过程中的1067次闪电和预警指标的相关性进行统计分析,初步确定武汉地区雷电预警指标阈值。结果表明:雷电发生与大气电场强度、雷达回波反射率因子、回波顶高、垂直累积液态水含量等指标关系密切;大气电场强度阈值为2kV/m左右;-10℃高度上回波强度大于等于40dBz且回波顶高为6km左右、垂直累积液态水含量大于等于10kg/m2可以作为武汉地区雷电预警阈值,且不同的月份阈值有所变化。
Based on the data of CINRAD in Hubei electric field instrument in Wuhan area, and the Province, the lightning location system and atmospheric statistical analysis of 1067 lightning strikes during 184 thunderstorm processes from January 2012 to July 2014, an analysis is made of the correlation between warning indexes and lightning occurrence, and the thresholds in Wuhan are determined. It is shown that the occurrence of lightning is closely related to the intensity of atmospheric electric field, radar reflectivity, height of echo top, and vertically integrated liquid： the threshold of atmospheric electric field intensity is about 2 kV/m; at --10 ℃height, the intensity I≥40 dBz; the height of echo top is about 6 km; and VIL 910 kg/m2 in Wuhan area, which are different in different months.
出处
《气象科技》
北大核心
2015年第5期874-879,共6页
Meteorological Science and Technology
基金
湖北省气象局科技发展基金项目(2013Y04)资助
