Plasma depletions lasting into daytime during the recovery phase of a geomagnetic storm in May 2017:Analysis and simulation of GPS total electron content observations

作     者：Yuichi Otsuka Atsuki Shinbori Takuya Sori Takuya Tsugawa Michi Nishioka Joseph D.Huba Yuichi Otsuka;Atsuki Shinbori;Takuya Sori;Takuya Tsugawa;Michi Nishioka;Joseph D.Huba

作者机构：Institute for Space-Earth Environmental ResearchNagoya UniversityNagoyaJapan National Institute of Information and Communications TechnologyTokyoJapan Syntek TechnologiesFairfaxVAUSA 

出 版 物：《Earth and Planetary Physics》 (地球与行星物理（英文版）)

年 卷 期：2021年第5卷第5期

页      面：427-434页

核心收录：

学科分类：081802[工学-地球探测与信息技术] 070802[理学-空间物理学] 07[理学] 08[工学] 081105[工学-导航、制导与控制] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0804[工学-仪器科学与技术] 0811[工学-控制科学与工程] 

基　　金：supported by the Japan Society for the Promotion of Science,KAKENHI Grants,16H06286 and 20H00197 supported by NASA(NNH17ZDA001N07) NSF(AGS-1931415)grants(JDH) 

主　　题：plasma bubble GPS ionosphere ionospheric irregularity SAMI2 

摘      要：This paper reports that plasma density depletions appearing at middle latitudes near sunrise survived until afternoon on 29 May 2017 during the recovery phase of a geomagnetic *** analyzing GPS data collected in Japan,we investigate temporal variations in the horizontal two-dimensional distribution of total electron content(TEC)during the geomagnetic *** SYM-H index reached-142 n T around 08 UT on 28 May *** depletions extending up to approximately 38°N along the meridional direction appeared over Japan around 05 LT(LT=UT+9 hours)on 29 May 2017,when TEC rapidly increased at sunrise due to the solar extreme ultraviolet(EUV)*** TEC depletions appeared sequentially over Japan for approximately 8 hours in sunlit *** 06 LT on 29 May,when the plasma depletions first appeared over Japan,the background TEC was enhanced to approximately 17 TECU,and then decreased to approximately 80%of the TEC typical of magnetically quiet *** conclude that this temporal variation of background plasma density in the ionosphere was responsible for the persistence of these plasma depletions for so long in *** using the Naval Research Laboratory:Sami2 is Another Model of the Ionosphere(SAMI2),we have evaluated how plasma production and ambipolar diffusion along the magnetic field may affect the rate of plasma depletion *** shows that the plasma density increases at the time of plasma depletion appearance;subsequent decreases in the plasma density appear to be responsible for the long-lasting persistence of plasma depletions during *** plasma density depletion in the top side ionosphere is not filled by the plasma generated by the solar EUV productions because plasma production occurs mainly at the bottom side of the ionosphere.