热带气象学报2017，Vol.33Issue(5)：617-626,10.DOI:10.16032/j.issn.1004-4965.2017.05.005
香港地区地闪时空分布特征及其影响因素
TEMPORAL AND SPATIAL DISTRIBUTION CHARACTERISTICS OF CLOUD-TO-GROUND LIGHTNING ACTIVITY IN HONG KONG AND RELATED IMPACT FACTORS
摘要
Abstract
Cloud-to-ground (CG) lightning location data during 2006-2012 along with other relevant data,including meteorological parameters and terrain elevation,are analyzed to explore the characteristics of CG lightning activity in Hong Kong and related impact factors.Results show that the largest number of CG lightning strokes was detected in 2010 and the smallest number in 2011.The number of the days with high CG lightning frequency played a key role in the inter-annual variation of CG lightning activity in Hong Kong.The occurrence of CG lightning mainly concentrated between April and September.Positive correlations were shown between the monthly mean value of CG lightning stroke density and meteorological parameters,including temperature,relative humidity,rainfall and CAPE.The most active time for both positive and negative CG lightning strokes was about 1∶00 a.m.Lightning activity on the days with high CG lightning frequency,variation of solar radiation and differences in the thermodynamic characteristics between land and ocean were the main factors that affected the daily variation.In terms of spatial distribution,positive CG lightning stroke density over western areas was much higher than that over eastern areas,and areas with high negative CG lightning stroke density were mainly located around mountainous areas with high terrain elevation.Both positive and negative CG lightning stroke density showed a positive correlation with terrain elevation,and spatial distribution of negative CG lightning stroke density around six typical mountains showed a strong similarity with that of terrain elevation.关键词
地闪回击密度/时空分布/气象条件/海拔高度Key words
cloud-to-ground lightning stroke density/temporal and spatial distribution/meteorological conditions/terrain elevation分类
天文与地球科学引用本文复制引用
费蕾蕾,毕新慧,刘永林,陈鲁言,林钦浩,王新明,盛国英..香港地区地闪时空分布特征及其影响因素[J].热带气象学报,2017,33(5):617-626,10.基金项目
国家自然科学基金(41273114,41503088) （41273114,41503088）
中国博士后科学基金(2015M582429)共同资助 （2015M582429）
