摘要
2020年6月5日山西省沁源县发生森林火灾,通过对天气形势、雷达回波、闪电定位等多源气象资料的分析,并利用欧洲中期天气预报中心(European Centre for Medium-Range Weather Forecasts,ECMWF)第五代全球大气再分析产品——ERA5,分析了此次森林火灾前期及期间的温度、降水量等气象要素演变特征,再结合现场情况调查,给出了此次森林火灾的起因。结果表明:此次森林火灾是由一次正极性地闪所导致,雷击点处于对流云边缘,闪电发生时间为6月5日15:39,电流强度42.2 kA。事故前期起火点所在区域连续2 d未发生降水,火灾发生当日该区域地面增温明显,气温为30~33℃,降水量小于0.1 mm,微风。
A forest fire occurred in Qinyuan County,Shanxi Province on June 5,2020. Based on the analysis of weather situation,radar echo,lightning location and other multi-source meteorological data,and European Centre for Medium-Range Weather Forecasts(ECMWF) fifth-generation global atmospheric reanalysis(ERA5),the evolution characteristics of meteorological elements including temperature and precipitation were analyzed in the early stage and during the forest fire,and combined with the field investigation,the cause of the forest fire were given. The results show that the forest fire was caused by a positive lightning,the lightning point was at the edge of convective cloud and the lightning occurred at 15:39 BST on June 5,with the current intensity of 42. 2 kA. There was no precipitation in the areas around fire site for 2 consecutive days in the early stage,the 2 m temperature in the areas around fire site increased significantly on the day of the forest fire,with the air temperature of 30–33 ℃,and the precipitation was less than 0. 1 mm and it was breezy.
作者
钱勇
邱贵强
张华明
李强
崔蕾
李云飞
QIAN Yong;QIU Guiqiang;ZHANG Huaming;LI Qiang;CUI Lei;LI Yunfei(Institute of Desert Meteorology of China Meteorological Administration,Urumqi 830002,China;Shanxi Meteorological Observatory,Taiyuan 030006,China;Meteorological Disaster Prevention Technology Center of Shanxi Province,Taiyuan 030032,China;Disaster Prevention and Mitigation Support Center of Shanxi Province,Taiyuan 030001,China;Atmospheric Detection Technology Guarantee Center of Shanxi Province,Taiyuan 030002,China)
出处
《干旱气象》
2022年第3期536-543,共8页
Journal of Arid Meteorology
基金
山西省气象局项目(SXKZDDW20205204,SXKYBTC201510041,SXKMSDW20217103)
中国沙漠气象科学研究基金(Sqj2020006)共同资助。
关键词
森林
雷击火灾
降水量
闪电定位
forest
lighting-attributed fire
precipitation
lightning location
