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Plasma transport into the duskside magnetopause caused by Kelvin-Helmholtz vortices in response to the northward turning of the interplanetary magnetic field observed by THEMIS
Alternative TitleWOS:000516758500001
Yan, Guang Qing; Parks, George K.; Cai, Chun Lin; Chen, Tao; McFadden, James P.; Ren, Yong2
Source PublicationANNALES GEOPHYSICAE
2020
Volume38Issue:1Pages:263-273
DOI10.5194/angeo-38-263-2020
ISSN0992-7689
Language英语
KeywordLATITUDE BOUNDARY-LAYER SOLAR-WIND INSTABILITY MAGNETOTAIL WAVES MAGNETOSPHERE RECONNECTION INTERVAL FLANKS
AbstractA train of likely Kelvin-Helmholtz (K-H) vortices with plasma transport across the magnetopause has been observed by the Time History of Events and Macroscale Interactions during Substorms (THEMIS) at the duskside of the magnetopause. This unique event occurs when the interplanetary magnetic field (IMF) abruptly turns northward, which is the immediate change to facilitate the K-H instability. Two THEMIS spacecraft, TH-A and TH-E, separated by 3 RE, periodically encountered the duskside magnetopause and the low-latitude boundary layer (LLBL) with a period of 2 min and tailward propagation of 212 km s(-1). Despite surface waves also explaining some of the observations, the rotations in the bulk velocity observation, a distorted magnetopause with plasma parameter fluctuations and the magnetic field perturbations, as well as a high-velocity low-density feature indicate the possible formation of rolled-up K-H vortices at the duskside of the magnetopause. The coexistence of magnetosheath ions with magnetospheric ions and enhanced energy flux of hot electrons is identified in the K-H vortices. These transport regions appear more periodic at the upstream spacecraft and more dispersive at the downstream location, indicating significant transport can occur and evolve during the tailward propagation of the K-H waves. There is still much work to do to fully understand the Kelvin-Helmholtz mechanism. The observations of the direct response to the northward turning of the IMF, the possible evidence of plasma transport within the vortices, involving both ion and electron fluxes, can provide additional clues as to the K-H mechanism.
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7599
Collection中国科学院国家空间科学中心
Affiliation1.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China
2.Parks, George K.; McFadden, James P.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yan, Guang Qing,Parks, George K.,Cai, Chun Lin,et al. Plasma transport into the duskside magnetopause caused by Kelvin-Helmholtz vortices in response to the northward turning of the interplanetary magnetic field observed by THEMIS[J]. ANNALES GEOPHYSICAE,2020,38(1):263-273.
APA Yan, Guang Qing,Parks, George K.,Cai, Chun Lin,Chen, Tao,McFadden, James P.,&Ren, Yong.(2020).Plasma transport into the duskside magnetopause caused by Kelvin-Helmholtz vortices in response to the northward turning of the interplanetary magnetic field observed by THEMIS.ANNALES GEOPHYSICAE,38(1),263-273.
MLA Yan, Guang Qing,et al."Plasma transport into the duskside magnetopause caused by Kelvin-Helmholtz vortices in response to the northward turning of the interplanetary magnetic field observed by THEMIS".ANNALES GEOPHYSICAE 38.1(2020):263-273.
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