雄安新区地闪特征与土地利用相关性分析  

Correlation Analysis of the Cloud-to-ground Lightning Characteristics with Land-use in Xiong’an New Area

作　　者：李贵玲 范俊红 史锋旗 LI Guiling;FAN Junhong;SHI Fengqi(Hebei Meteorological Service Centre,Shijiazhuang 050021,China;Key Laboratory of Meteorology and Ecological Environment of Hebei Province,Shijiazhuang 050021,China;Hebei Meteorological Administrative and Technical Service Center,Shijiazhuang 050021,China)

机构地区：[1]河北省气象服务中心,河北石家庄050021 [2]河北省气象与生态环境重点实验室,河北石家庄050021 [3]河北省气象行政技术服务中心,河北石家庄050021

出　　处：《地理空间信息》2023年第5期36-39,58,共5页Geospatial Information

摘　　要：为更好地开展雷电灾害防御工作,提升防灾减灾服务水平,基于雄安新区2005—2007年、2009—2015年地闪监测数据,通过数理统计、归一化处理、ArcGIS空间连接分析等方法研究了雄安新区地闪空间分布特征及其与土地利用的相关性。结果表明:①雄安新区地闪发生次数年际呈波动变化趋势,2015年最多,地闪多发于6—8月的傍晚至前半夜,19时达到峰值;②地闪高密度区集中在中南部地区和白洋淀水域;③地闪电流高强度区集中在西部和东部;④地闪高风险区集中在西部区域和白洋淀水域的中南部区域;⑤不同用地类型的地闪发生频次和电流强度不同,农田频次最高,负地闪占比超过90%,水体地闪年均密度最大,裸地地闪年均电流强度最大,灌木区年均密度和电流强度均最小。In order to better carry out lightning protection work and improve the service level,based on the cloud-to-ground(CG)lighting monitoring data in Xiong’an New Area from 2005 to 2007 and from 2009 to 2015,we used mathematical statistics,normalized processing and Arc-GIS spatial connection analysis to analyze the spatio-temporal distribution characteristics and the correlation with land-use.The results show that①the annual CG lightning frequency in Xiong’an New Area has a fluctuating trend and reaches the peak in 2015,and mostly occurs from June to August in the evening to the first half of the night,and reaches the peak at 19:00 BT.②High-density areas are concentrated in the central and southern areas,also does the Baiyangdian water area.③The high current intensity is concentrated in the west and east.④High risk areas are located in the western area and the central and southern parts of the Baiyangdian water area.⑤The CG lightning frequency and current intensity are different under different land-use types.Lightning occurs most frequently in farmland with negative CG lightning of more than 90%.The average annual density in water area is the highest,and the average annual current intensity in bare land area is the highest,but the average annual density in shrub area is the least,and the average current intensity is also the lowest.

关 键 词：地闪 空间分布 土地利用相关性 

分 类 号：P208[天文地球—地图制图学与地理信息工程]