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Magnetospheric Multiscale observations of energetic oxygen ions at the duskside magnetopause during intense substorms
Alternative TitleWOS:000510389200001
Zeng, Chen1; Duan, Suping; Wang, Chi1; Dai, Lei; Fuselier, Stephen2,3; Burch, James2; Torbert, Roy4; Giles, Barbara5; Russell, Christopher6
Source PublicationANNALES GEOPHYSICAE
2020
Volume38Issue:1Pages:123-135
DOI10.5194/angeo-38-123-2020
ISSN0992-7689
Language英语
KeywordNEAR-EARTH MAGNETOTAIL MAGNETIC RECONNECTION ELECTRIC-FIELDS IONOSPHERIC O+ DEPENDENCE INJECTION OUTFLOW DIPOLARIZATION HYDROGEN ORIGIN
AbstractEnergetic oxygen ions (1-40 keV) observed by the Magnetospheric Multiscale (MMS) satellites at the duskside magnetopause boundary layer during phase 1 are investigated. There are 57 duskside magnetopause crossing events identified during intense substorms (AE > 500 nT). These 57 events of energetic O+ at the duskside magnetopause include 26 events during the expansion phase and 31 events during the recovery phase of intense substorms. It is found that the O+ density in the duskside magnetopause boundary layer during the recovery phase (0.081 cm(-3)) is larger than that during the expansion phase (0.069 cm(-3)). The 26 events of energetic O+ ions at the duskside magnetopause during intense substorm expansion phase are all under the southward interplanetary magnetic field (IMF). There are only seven events under northward IMF, and they all occurred during the intense substorm recovery phase. The density of energetic O+ at the duskside magnetopause ranges from 0.007 to 0.599 cm(-3). The maximum density of O+ occurred during the intense substorm recovery phase and under southward IMF. When the IMF is southward, the O+ density shows an exponential increase with the IMF B-z absolute value. Meanwhile, the O+/H+ density ratio shows an exponential growth with the IMF B-y. These results agree with previous studies in the near-Earth magnetosphere during intense substorm. It is suggested that O+ abundance in the duskside magnetopause boundary layer has a close relation to O+ variations in the near-Earth magnetosphere during intense substorms.
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7574
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, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Southwest Res Inst, San Antonio, TX USA
4.Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX USA
5.Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA
6.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA
7.Univ Calif Los Angeles, Dept Earth & Space Sci, IGPP EPSS, Los Angeles, CA 90024 USA
Recommended Citation
GB/T 7714
Zeng, Chen,Duan, Suping,Wang, Chi,et al. Magnetospheric Multiscale observations of energetic oxygen ions at the duskside magnetopause during intense substorms[J]. ANNALES GEOPHYSICAE,2020,38(1):123-135.
APA Zeng, Chen.,Duan, Suping.,Wang, Chi.,Dai, Lei.,Fuselier, Stephen.,...&Russell, Christopher.(2020).Magnetospheric Multiscale observations of energetic oxygen ions at the duskside magnetopause during intense substorms.ANNALES GEOPHYSICAE,38(1),123-135.
MLA Zeng, Chen,et al."Magnetospheric Multiscale observations of energetic oxygen ions at the duskside magnetopause during intense substorms".ANNALES GEOPHYSICAE 38.1(2020):123-135.
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