Suppression of Plasma Bubbles over South America under Weak Geomagnetic Perturbations

作     者：Xunzhe YIN Dongjie YUE Changzhi ZHAI Yutian CHEN Xiaoyun CHENG Xunzhe YIN;Dongjie YUE;Changzhi ZHAI;Yutian CHEN;Xiaoyun CHENG

作者机构：School of Earth Sciences and EngineeringHohai UniversityNanjing 210098China 

出 版 物：《Journal of Geodesy and Geoinformation Science》 (测绘学报（英文版）)

年 卷 期：2023年第6卷第4期

页      面：48-69页

核心收录：

学科分类：070801[理学-固体地球物理学] 070802[理学-空间物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：National Natural Science Foundation of China(No.42104009) China Postdoctoral Science Foundation(No.2022M720988) Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX22_0663) 

主　　题：plasma bubble ionospheric scintillation weak geomagnetic perturbations 

摘      要：During a long-term Equatorial Plasma Bubbles(EPBs)occurrence between October 2020 and March 2021,a significant EPB suppression event was identified on November 22 and the observations from multi-instrument have been utilized to investigate this ***-scale Observations of the Limb and Disk(GOLD)satellite observed prominent EPBs between 23:40 UT and 23:55 UT during the long-term occurrence ***,no dark stripes representing EPBs were observed on November 22,and the Equatorial Ionization Anomaly(EIA)structure remained *** Total Electron Content(TEC)maps show that these EPBs appeared in the region between 35°W and 65°W longitudes and the magnitudes of the TEC loss in EPBs regions were about 20 *** for 22 November,the S4 index was consistently greater than 0.6 throughout November,indicating significant ionospheric *** Rate Of TEC Index(ROTI)maps revealed that the spatial extent and intensity of EPBs increased after their suppression,and the EPBs were locally *** swarm electron density measurements indicated that the variation amplitudes of EPBs at 510 km altitude were approximately 3 to 5 times larger than that at 460 km *** impact region of EPBs at 510 km was between 15°S and 20°N latitudes,while at 460 km,it was between 0°and 17°N *** the period of EPB suppression,the average h’f at three ionosonde stations decreased by about 50 km,and the vertical drift velocity(V z)approached~0 m/s while it was more than 20 m/s during the long-term occurrence.