基于IGS数据分析台风“利奇马”引起的电离层TEC扰动  

Analysis of ionospheric TEC disturbances caused by typhoon Lekima based on IGS Data

作　　者：宋福成 时爽爽 史云飞[1,3] 周瑞宸 SONG Fucheng;SHI Shuangshuang;SHI Yunfei;ZHOU Ruichen(Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection,College of Resources and Environment,Linyi University,Linyi 276000,China;School of Environmental Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China;Key Laboratory of Urban Land Resources Monitoring and Simulation Ministry of Land and Resources,Shenzhen 518034,China)

机构地区：[1]山东省水土保持与环境保育重点实验室,临沂大学资源环境学院,山东临沂276000 [2]中国矿业大学环境与测绘学院,江苏徐州221116 [3]国土资源部城市土地资源监测与仿真重点实验区,广东深圳180402

出　　处：《全球定位系统》2020年第3期83-88,共6页Gnss World of China

基　　金：山东省自然科学基金(ZR2018PD007,ZR2017BD018,ZR2016DB06);临沂大学博士科研启动基金(LYDX2016BS110);国土资源部城市土地资源监测与仿真重点实验室开放基金(KF-2018-03-034);大学生创新创业训练计划(201910452037,201810452253)。

摘　　要：文中利用国际GNSS服务(IGS)提供的全球电离层地图(GIM)格网电离层资料,借助滑动四分位距法,研究了2019年台风"利奇马"期间电离层电子浓度总含量(TEC)的异常变化情况.对台风"利奇马"期间电离层TEC时序变化及区域空间变化进行分析,发现在台风发生前第5天,电离层TEC出现了正异常变化;台风登陆后第二天,台风影响区域上空电离层TEC异常由正异常变化为负异常再变化为正异常,正异常最大值达8 TECU,负异常最大值达6 TECU,且最大异常点并不在风眼处,而是在风眼的西南侧,此异常可能与台风登陆期间台风风速及风向变化有关.In this paper we use the global GIM grid ionosphere data provided by IGS to investigate the ionospheric TEC disturbances induced by typhoon lekima in 2019.By means of the sliding interquartile range method,the temporal and regional spatial changes of the ionospheric TEC during typhoon Lekima were analyzed.It was found that the ionospheric TEC showed positive abnormal changes on the fifth day before the typhoon.On the second day after typhoon landing,the ionospheric TEC anomaly over the typhoon affected area changes from positive anomaly to negative anomaly and then changes to positive anomaly.The maximum value of positive anomaly reaches 8 TECU,and the maximum value of negative anomaly reaches 6 TECU.The maximum abnormal point does not coincide with the eye of the wind,but appears in the southwest region of the centre.This analysis suggests that this ionospheric TEC disturbances may be related to the change of wind speed and direction during the landing of typhoon.

关 键 词：台风 利奇马 电离层扰动 最大风速 TEC 

分 类 号：P228.49[天文地球—大地测量学与测量工程]