2007-2011年山东省夏季闪电分布特征分析  

Analysis on Characteristics of Lightning in Summer from 2007 to2011 in Shandong Province

作　　者：宁波[1,2] 巩在武[1] 

机构地区：[1]南京信息工程大学公共管理学院,江苏南京210044 [2]山东省气象局,山东济南250031

出　　处：《山东农业大学学报（自然科学版）》2015年第4期613-617,共5页Journal of Shandong Agricultural University：Natural Science Edition

基　　金：山东省气象局青年科研基金项目(2014SDQN13)

摘　　要：利用2007-2011 年的地闪资料,从闪电频数、月变化、日变化、电流强度、空间密度等方面研究了山东省夏季闪电的时空分布特征.研究发现：夏季负地闪占总地闪的绝大数;总闪频数在夏季（6-8 月）是逐月递增的,正闪比例逐月递减,负闪频数变化与总闪有很好的-致性;地闪频数日变化呈现明显的双峰双谷型,正闪频数的变化是滞后于负闪的;正闪的电流强度均值大于负闪,在高强度区,正闪比例高于负闪;通过分析地闪空间密度分布发现,总体呈现山区大于平原,南多北少,地闪主要分布在鲁中、鲁南山区及胶东半岛.Based on the data of cloud-to-ground lightning (2007~2011), the spatial and temporal distributions of lightning were studied from many aspects including diurnal and monthly variations of lightning frequency, current strength, and space density in Shandong Province. The results indicated that most ground lightings in summer are predominantly negative. The total and negative lightning frequencies in summer (June-August) show a similar characteristic of increasing month by month while the ratio of positive lightning declining. The diurnal variation of the ground lightning show a shape with two peak-valleys and the frequency variation of positive lightning lags behind the negative. In the high intensity zone, positive lightning has the larger proportion and greater average of current intensity than the negative lightning. Cloud-to-ground lightning mainly occurs in the middle and southern mountain area and the Shandong Peninsula and there is a greater general spatial density in the south and mountains and less in the north and plains in Shandong.

关 键 词：山东 闪电 时空特征 

分 类 号：S761.5[农业科学—森林保护学]