摘要
大气电场强度是大气电学的重要参数.大气电场的准确测量对雷暴和地震的监测、预警等具有重要的意义.利用2015年8月27日气球搭载大气电场仪测量近地面大气电场实验得到的电场数据,分析在特殊地形表面近地面500 m高度内大气电场强度随高度的变化特征.结果表明:晴天条件下,火山喷发形成的熔岩平台山顶上空近地面大气电场强度随高度增加呈指数递减,大气电场的数值和变化范围均较大,尤其是近地面100 m高度内,大气电场值达到1 kV·m-1以上.此外,还通过经验公式得出了近火山灰石地表的大气电导率.受空气中重离子的影响,其电导率远小于全球大气电导率的平均值.实验结果丰富了在特殊地形下大气电场的测量结果,揭示了中国内蒙古锡林浩特地区火山山顶近地面大气电场强度随高度的变化特征.
The intensity of the atmospheric electric field is an important parameter of atmospheric electricity.Accurate measurements of the atmospheric electric field are important for the monitoring and warning of thunderstorms and earthquakes.In this paper,the electric field data obtained by a balloon experiment of measuring the near-surface atmospheric electric field on 27 August 2015 is used to study the distribution of the atmospheric electric field with height within 500 m near the Earth surface.The results show that fair-weather atmospheric electric field value over the top of a flat mountain rises exponentially with height.Both the values and range of the atmospheric electric field are large,especially within the height of 100 m,and the value can reach 1 kV·m-1 or more.In addition,the empirical formula is used to derive the atmospheric conductivity near the surface of the Earth.Influenced by heavy ions in the air,the conductivity is much smaller than the average of global atmospheric conductivity.The results of this experiment not only enrich the observations of the atmospheric electric field under special terrain condition,but also reveal the distribution of electric field with height in the near-surface atmosphere of an extinct volcano in Xilin Hot,Inner Mongolia Area,China.
作者
吴晗
陈涛
李仁康
何兆海
张华伟
罗静
罗福山
王迺权
董伟
WU Han;CHEN Tao;LI Renkang;HE Zhaohai;ZHANG Huawei;LUO Jing;LUO Fushan;WANG Naiquan;DONG Wei(State Key Laboratory of Space Weather,National Space Science Center,Chinese Academy of Sciences,Beijing 100190;University of Chinese Academy of Sciences,Beijing 100049;College of Physics and Electronic Information,Yunnan Normal University,Kunming 650500)
出处
《空间科学学报》
CAS
CSCD
北大核心
2020年第3期357-363,共7页
Chinese Journal of Space Science
基金
中国科学院科学先导专项(XDA17010301,XDA17040505,XDA15052500,XDA15350201),中国科学院国家空间科学中心培育专项135项目(Y92111BA8S)
国家自然科学基金项目(41874175,41931073,41574159)
云南省基础研究青年项目(2019FD111)
ISSI-Beijing项目Relativistic Electron Precipitation and its Atmospheric Effects
国家重点实验室专项基金项目共同资助。
关键词
晴天大气电场
气球测量系统
火山灰石地表
Fair-weather atmospheric electric field
Balloon measurement system
Volcanic limestone surface
