湖北黄冈地区2006—2011年闪电时空分布特征  

Spatio-temporal Distribution Features of Lightning at the Huanggang Area in Hubei During 2006-2011

作　　者：王慧[1] 王沛涛[2] 高玉龙[1] 

机构地区：[1]黄冈市气象局,湖北黄冈438000 [2]邯郸市气象局,河北邯郸056000

出　　处：《沙漠与绿洲气象》2013年第1期60-64,共5页Desert and Oasis Meteorology

摘　　要：利用湖北省2006—2011年13个ADTD站的闪电定位资料,对黄冈地区的闪电频次、电流强度与极性等方面的时空分布特征进行分析。结果表明,黄冈地区以负闪电为主,负闪电占总闪数的97.4%,平均闪电强度为37.59 kA;正闪电仅占总数的2.6%,平均闪电强度47.36 kA。正、负闪电的发生频次有明显的日变化和季节变化特征。闪电频次的日变化呈双峰值型,高峰值出现在16时与19时。季节变化呈明显单峰值特征,4—9月闪电次数占总闪数的94.6%,其中6—8月占83.6%。闪电高密度区主要集中于黄冈中部的黄州、团风、浠水及罗田南部地区,密度值普遍在80次(/25 km2.a)以上。雷电流强度值主要集中在10～60 kV之间,占总次数的89.1%。Based on the lightning location data of the 13 ADTD stations in Hubei Provincefrom 2006 to 2011 ,the temporal-spatial distribution features of lightning frequency,current intensity and polarity in Huanggang were studied. The results indicated that most of lightning were negative lightning, accounting for 97.4% with the mean lightning intensity of 37.59 kA. Positive lightning accounting for only 2.6% with the mean intensity of 43.76 kA. The positive and negative lightning occured clearly with characteristics of daily and monthly variation. Daily variation of lightning frequency clearly showed two peaks at 16：00 and 19：00 in a day, Monthly variation of lightning frequency clearly showed single peak. That from April to September accounted for 94.6% of the whole year and that from June to August accounted for 83.6%; High density lightning area mainly were Huangzhou, Tuanfeng, Xishui and southern Luotian in central Huanggang where the lightning density was greater than 80/25 km2＂a . The lightning intensity was mainly concentrated between 10-60 kA which accounted for 89.1%,among which the positive lightning accounted for 75.8% and the negative lightning accounted for 89.5%.

关 键 词：闪电 时空分布 湖北 黄冈地区 

分 类 号：P427.3[天文地球—大气科学及气象学]