武汉市雷电分布特征及雷暴日资料的对比分析

Distribution features of lightning and comparative analysis of thunderstorm days in Wuhan

利用2006-2008年湖北省雷电监测定位网的定位资料,对武汉市雷电分布的时间特性进行分析。并将定位资料与武汉国家基本气象站的天气现象日值观测资料进行对比,从雷暴日这一观测要素上分析两种资料存在的差异及主要原因,以便更好地为雷电自动监测逐步取代人工观测提供参考。分析结果表明:武汉市的雷电活动以负闪为主,负闪占总闪的比例高达96.1%,且具有明显的月变化和日变化特征。雷电定位的雷暴日数普遍高于人工观测记录的结果,且在雷电高发月份,雷暴日数相差较大,但两者分布趋势大体相同。随着雷电自动监测资料的积累,可以消除人工观测资料存在的局限性。

The temporal distribution features of lightning in Wuhan has been analysed on the basis of location data of Hubei lighthing monitoring and locating network from 2006 to 2008. To find out the differences between the two kinds of observation datas and the reason for the differences in the view of thunderstorm days, the contrast of the lightning location data and weather phenomenon observational data from Wuhan weather station has also been made. It can provide a reference for the automatic detection of lightning observation to replace artificial observation gradually. The results show that negative lightning is produced as high as 96.1% in most thunderstorms around Wuhan. The lightning activities have obvious monthly and dayly characteristics. The number of thunderstorm days of lightning location is generally higher than the results of artificial observation. In the month of high incidence of lightning, the differences between the two numbers are larger, but they have the same distribution trend on the whole. With the accumulation of lightning automatic detection, the limitation of artificial observation can be eliminated.