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Asymmetric Transport of the Earth's Polar Outflows by the Interplanetary Magnetic Field
Wang, Juan; Huang, Can; Ge, Yasong S.; Dui, Aimin; Feng, Xueshang; Li, Kun
Department空间科学部
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2019
Volume881Issue:2Pages:L34
DOI10.3847/2041-8213/ab385d
ISSN2041-8205
Language英语
KeywordEarth magnetic fields magnetohydrodynamics (MHD) plasmas solar-terrestrial relations solar wind
AbstractThe polar outflows, as an important plasma source of the Earth's magnetosphere, usually exhibit significant north- south asymmetries, which can strongly affect the plasma distributions in the magnetotail lobe and perhaps contribute to the substorm triggering. But the mechanism of the asymmetric transport of these outflows is still unclear. In this Letter, 3D global magnetohydrodynamic (MHD) simulations are performed to investigate the development of the polar outflows after their escapes from the inner boundary under influences of the interplanetary magnetic field (IMF) B-x. It is found that the velocity of northern polar outflows is much stronger than the south. We suggest that the IMF B-x causes the north-south asymmetries in the magnetospheric configuration, and subsequently, great differences of the force and mass distributions appear between the two hemispheres, which lead to the significant north-south asymmetries in the transport of the polar outflows. We also discuss the differences in the acceleration mechanisms of the polar outflows between the northward and southward IMF cases.
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7249
Collection空间科学部
Recommended Citation
GB/T 7714
Wang, Juan,Huang, Can,Ge, Yasong S.,et al. Asymmetric Transport of the Earth's Polar Outflows by the Interplanetary Magnetic Field[J]. ASTROPHYSICAL JOURNAL LETTERS,2019,881(2):L34.
APA Wang, Juan,Huang, Can,Ge, Yasong S.,Dui, Aimin,Feng, Xueshang,&Li, Kun.(2019).Asymmetric Transport of the Earth's Polar Outflows by the Interplanetary Magnetic Field.ASTROPHYSICAL JOURNAL LETTERS,881(2),L34.
MLA Wang, Juan,et al."Asymmetric Transport of the Earth's Polar Outflows by the Interplanetary Magnetic Field".ASTROPHYSICAL JOURNAL LETTERS 881.2(2019):L34.
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