北京上空电离层8小时潮汐波对2018年SSW的响应研究  

Response of ionospheric terdiurnal tides to the 2018 SSW over Beijing

作　　者：张雯敏 马铮 龚韵[1,2] 张绍东 李国主[4] ZHANG WenMin;MA Zheng;GONG Yun;ZHANG ShaoDong;LI GuoZhu(School of Electronic Information,Wuhan University,Wuhan 430072,China;Key Laboratory of Geospace Environment and Geodesy,Ministry of Education,Wuhan 430079,China;State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,China;Key Laboratory of Earth and Planetary Physics,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China)

机构地区：[1]武汉大学电子信息学院,武汉430072 [2]地球空间环境与大地测量教育部重点实验室,武汉430079 [3]武汉大学测绘遥感信息工程国家重点实验室,武汉430079 [4]中国科学院地质与地球物理研究所,北京100029

出　　处：《地球物理学报》2022年第6期1921-1930,共10页Chinese Journal of Geophysics

基　　金：中央高校基本科研业务费专项资金(2042021kf0021);国家自然科学基金(42104145);中国博士后科学基金(2020TQ0230,2021M692465)联合资助。

摘　　要：本文利用北京中国科学院地质与地球物理研究所站和北京怀柔站的电离层TEC数据以及由全球导航卫星服务系统(IGS)提供的全球电离层地图(GIM)数据,研究了2018年2月极区平流层爆发性增温(SSW)期间北京上空电离层8小时潮汐波的变化过程.研究结果表明,SSW发生后电离层8小时潮汐波振幅有较长时间的明显增强,且增强分量主要为8小时迁移潮汐波.同时,SSW发生后北京站上空电离层增强的8小时潮汐波也呈现出周期约为6.5天的振荡.通过分析同一时期北京站流星雷达观测到的风场数据,我们发现SSW爆发后低层大气中也存在着异常增强的6.5天波.这表明电离层中调制8小时潮汐波的6.5天振荡很可能与SSW期间低层大气所激发的6.5天波有关.We present an analysis of the ionospheric terdiurnal tides over Beijing(40°N,116°E)during a sudden stratospheric warming(SSW)event that occurred in February 2018.The analysis is based on the total electron content(TEC)data provided by the Institute of Geology and Geophysics,the Chinese Academy of Sciences(IGGCAS),and the Global Ionospheric Maps(GIM)data from the International Global Navigation Satellite Systems Service(IGS).The ionospheric terdiurnal tides in the TEC data are enhanced after the onset of the 2018 SSW.According to the IGS GIM data,the enhancement mainly occurs in the migrating terdiurnal tidal component.Meanwhile,the amplitudes of the terdiurnal tides are modulated by a 6.5-day oscillation.During the 2018 SSW,the amplitudes of the terdiurnal tides in the TEC data exhibit a 6.5-day oscillation.Using the neutral winds obtained from a meteor radar over Beijing,a 6.5-day wave in the mesosphere and lower thermosphere(MLT)region is also observed after the onset of the 2018 SSW.Our results indicate that the terdiurnal tide in the TEC is modulated by the 6.5-day wave originally generated in the lower atmosphere during the 2018 SSW.

关 键 词：电离层TEC 平流层爆发性增温 迁移潮汐波 8小时潮汐波 6.5天波 

分 类 号：P351[天文地球—空间物理学]