基于2种观测资料对我国闪电活动特征分析

Characteristics of Lightning Activity in China Based on Two Observations Data

近年来,由于我国的地理环境差异性较大以及气候各不相同,造成了我国的闪电活动具有一定的空间分布特征,闪电的发生往往伴随着暴雨等气候,给人们的生活以及整个生态系统均构成了威胁。利用2010—2014年OTD/LIS以及ATD定位资料,采用了统计学方法,对我国闪电密度空间分布以及闪电频次日、月变化以及经纬度变化特征进行研究。结果表明:对于闪电密度空间分布情况,这2种观测资料具有较好的相似性。统计出的闪电密度主要集中在我国沿海区域,而在西北区域闪电活动相对较少,闪电频次日分布情况,这2种观测资料具有一定的差异性;根据OTD/LIS资料,闪电频次月变化呈单峰值变化趋势,而对于ATD资料,闪电频次月变化呈单谷-单峰值变化类型。对于闪电频次经纬度分布情况,这2种观测资料具有较大差异性。

In recent years, due to the large geographical differences and climate vary,resulting in lightning activity of a certain spatial distribution of lightning occurs often accompanied by rain and other weather, to people＇s lives and the entire ecosystem constitute a threat. In this paper, using of OTD/LIS and ATD location data from 2010 to 2014, statistical methods were employed ,the spatial distribution of lightning, daily ,monthly change characteristics of lightning density, and latitude and longitude variation characteristics were studied. Results showed that：The lightning density spatial distribution of these two observations have good similarity. Lightning density statistics are mainly concentrated in China＇s coastal regions, and in a relatively small area northwest of lightning activity,lightning frequency distribution of the next day,two observations have some differences. According to OTD/LIS data ,frequency of lightning monthly change showed a single peak trend ,while data for the ATD monthly change of lightning frequency showed a single valley-single-peak variation type. For the frequency of lightning latitude distribution, these two observations have greater difference.