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Multiple transpolar auroral arcs reveal insight about coupling processes in the Earth's magnetotail
Alternative TitleWOS:000553292000024
Zhang, Qing-He; Zhang, Yong-Liang; Wang, Chi; Lockwood, Michael3; Yang, Hui-Gen; Tang, Bin-Bin; Xing, Zan-Yang; Oksavik, Kjellmar5,6; Lyons, Larry R.; Ma, Yu-Zhang; Zong, Qiu-Gang; Moen, Joran Idar6,9; Xia, Li-Dong
Source PublicationPROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
2020
Volume117Issue:28Pages:16193-16198
DOI10.1073/pnas.2000614117
ISSN0027-8424
Language英语
Keywordaurora solar-terrestrial interaction magnetosphere polar ionosphere transpolar auroral arcs POLAR-CAP ARCS INTERPLANETARY MAGNETIC-FIELD THETA-AURORA SOLAR-WIND MAGNETOSPHERE RECONNECTION MAGNETOPAUSE DAYSIDE CLUSTER
AbstractA distinct class of aurora, called transpolar auroral arc (TPA) (in some cases called theta aurora), appears in the extremely high -latitude ionosphere of the Earth when interplanetary magnetic field (IMF) is northward. The formation and evolution of TPA of-fers clues about processes transferring energy and momentum from the solar wind to the magnetosphere and ionosphere during a northward IMF. However, their formation mechanisms remain poorly understood and controversial. We report a mechanism identified from multiple-instrument observations of unusually bright, multiple TPAs and simulations from a high-resolution three-dimensional (3D) global MagnetoHydroDynamics (MHD) model. The observations and simulations show an excellent agree-ment and reveal that these multiple TPAs are generated by pre-cipitating energetic magnetospheric electrons within field-aligned current (FAC) sheets. These FAC sheets are generated by multiple -flow shear sheets in both the magnetospheric boundary produced by Kelvin-Helmholtz instability between supersonic solar wind flow and magnetosphere plasma, and the plasma sheet generated by the interactions between the enhanced earthward plasma flows from the distant tail (less than -100 RE) and the enhanced tailward flows from the near tail (about -20 RE). The study offers insight into the complex solar wind-magnetosphere-ionosphere coupling pro-cesses under a northward IMF condition, and it challenges existing paradigms of the dynamics of the Earth's magnetosphere.
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7581
Collection中国科学院国家空间科学中心
Affiliation1.Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Shandong, Peoples R China
2.Johns Hopkins Univ, Appl Phys Lab, Johns Hopkins Rd, Laurel, MD 20723 USA
3.Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China
4.Univ Reading, Dept Meteorol, Reading RG6 6BB, Berks, England
5.Minist Nat Resources, Polar Res Inst China, Key Lab Polar Sci, Shanghai 200136, Peoples R China
6.Univ Bergen, Birkeland Ctr Space Sci, Dept Phys & Technol, N-5020 Bergen, Norway
7.Univ Ctr Svalbard, Arctic Geophys Dept, N-9171 Longyearbyen, Norway
8.Lyons, Larry R.] Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA
9.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
10.Univ Oslo, Dept Phys, N-0371 Oslo, Norway
Recommended Citation
GB/T 7714
Zhang, Qing-He,Zhang, Yong-Liang,Wang, Chi,et al. Multiple transpolar auroral arcs reveal insight about coupling processes in the Earth's magnetotail[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(28):16193-16198.
APA Zhang, Qing-He.,Zhang, Yong-Liang.,Wang, Chi.,Lockwood, Michael.,Yang, Hui-Gen.,...&Xia, Li-Dong.(2020).Multiple transpolar auroral arcs reveal insight about coupling processes in the Earth's magnetotail.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(28),16193-16198.
MLA Zhang, Qing-He,et al."Multiple transpolar auroral arcs reveal insight about coupling processes in the Earth's magnetotail".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.28(2020):16193-16198.
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