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A Possible Mechanism on the Detachment Between a Subauroral Proton Arc and the Auroral Oval

文献类型：期刊论文

作者Zhou, Su2,4; Luan, Xiaoli2; Burch, J. L.1; Yao, Zhonghua6; Han, De-Sheng5; Tian, Chenjing3; Chen, Yuqing4; Zhang, Jin4; Yu, Xiaoyan4; Dai, Tianjun4
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期2021-02-01
卷号126期号:2页码:15
关键词contraction of the auroral oval convection electric field EMIC waves proton aurora subauroral proton arc
ISSN号2169-9380
DOI10.1029/2020JA028493
英文摘要Subauroral proton arcs are a type of terrestrial auroral phenomena, which are often detached equatorially from the auroral oval. This work presents evolution of a subauroral proton arc using observations of the Special Sensor Ultraviolet Spectrographic Imager and Special Sensor J (SSJ) on board Defense Meteorological Satellite Program (DMSP) spacecraft. The arc was observed in the afternoon sector and was located within 60 degrees-70 degrees geomagnetic latitude during the recovery phase of a moderate magnetic storm with the minimum SYM-H index of -55 nT. Particle measurements from DMSP F17/SSJ indicate that the arc was detached from the normal oval and produced by energetic ring current ions with energies above 10 keV. These energetic ions were likely scattered into the magnetic loss cone by electromagnetic ion cyclotron waves in the frequency range between 0.1 and 0.5 Hz, as confirmed by Pc1 waves derived from the observations of a ground station. Continuous auroral observations directly show that the subauroral proton arc was detached from the oval during evolution. Following a northward interplanetary magnetic field turning, the auroral oval moved toward higher latitudes. We propose that the equatorward edge of the auroral oval is less influenced by the convection electric field, and thus moves more slowly than the poleward edge. This mechanism is proposed for producing a separation between the equatorward and poleward parts of the auroral oval, with the former evolving into the subauroral proton arc.
资助项目National Natural Science Foundation of China[41874184] ; National Natural Science Foundation of China[41904139] ; National Natural Science Foundation of China[41774174] ; Department of Education of Guizhou Province[QJH-KYZ[2019]064] ; Guiyang University[GYU-KY-[2021]] ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science and Technology of China[GE2020-01] ; Canadian Space Agency ; Guiyang University
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000627265100017
出版者AMER GEOPHYSICAL UNION
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Department of Education of Guizhou Province ; Department of Education of Guizhou Province ; Guiyang University ; Guiyang University ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science and Technology of China ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science and Technology of China ; Canadian Space Agency ; Canadian Space Agency ; Guiyang University ; Guiyang University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Department of Education of Guizhou Province ; Department of Education of Guizhou Province ; Guiyang University ; Guiyang University ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science and Technology of China ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science and Technology of China ; Canadian Space Agency ; Canadian Space Agency ; Guiyang University ; Guiyang University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Department of Education of Guizhou Province ; Department of Education of Guizhou Province ; Guiyang University ; Guiyang University ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science and Technology of China ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science and Technology of China ; Canadian Space Agency ; Canadian Space Agency ; Guiyang University ; Guiyang University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Department of Education of Guizhou Province ; Department of Education of Guizhou Province ; Guiyang University ; Guiyang University ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science and Technology of China ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science and Technology of China ; Canadian Space Agency ; Canadian Space Agency ; Guiyang University ; Guiyang University
源URL[http://ir.iggcas.ac.cn/handle/132A11/101055]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Luan, Xiaoli
作者单位1.Southwest Res Inst, San Antonio, TX USA
2.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Geospace Environm, Hefei, Peoples R China
3.Natl Univ Def Technol, Inst Meteorol & Oceanol, Nanjing, Peoples R China
4.Guiyang Univ, Sch Elect & Commun Engn, Guiyang, Peoples R China
5.Tongji Univ, Sch Ocean & Earth Sci, State Key Lab Marine Geol, Shanghai, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Su,Luan, Xiaoli,Burch, J. L.,et al. A Possible Mechanism on the Detachment Between a Subauroral Proton Arc and the Auroral Oval[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2021,126(2):15.
APA Zhou, Su.,Luan, Xiaoli.,Burch, J. L..,Yao, Zhonghua.,Han, De-Sheng.,...&Dai, Tianjun.(2021).A Possible Mechanism on the Detachment Between a Subauroral Proton Arc and the Auroral Oval.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,126(2),15.
MLA Zhou, Su,et al."A Possible Mechanism on the Detachment Between a Subauroral Proton Arc and the Auroral Oval".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 126.2(2021):15.

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来源：地质与地球物理研究所

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