globalchange  > 气候减缓与适应
DOI: 10.1029/2017JA025028
Scopus记录号: 2-s2.0-85047645385
论文题名:
Study on the Curvature and Gradient of the Magnetic Field in Earth's Cusp Region Based on the Magnetic Curvature Analysis Method
作者: Xiao C.; Liu W.; Shen C.; Zhang H.; Rong Z.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:5
起始页码: 3794
结束页码: 3805
语种: 英语
英文关键词: current density ; cusp ; magnetic curvature ; magnetic gradient
英文摘要: This paper uses the multiple-point magnetic measurements from the Cluster mission to investigate the curvature and gradient of the magnetic field as well as their relations with the current density inside the cusp region under different interplanetary magnetic field (IMF) conditions. From two event studies, it is shown that the curvature radius of magnetic field line is on average 5.13 RE under southward IMF and 19.75 RE under northward IMF condition. The directional angle of curvature is more distributed in a wider range under southward condition. The gradient of the magnetic field strength B is larger with a larger standard deviation under southward IMF condition. These results imply that the cusp region has more complicated magnetic structures under southward IMF condition. Through the correlation analysis between the magnetic field parameters and the current density, it is found that the magnetic gradient has a strong relation with total current density jt and perpendicular current density j⊥ when the ratio of parallel component j// to jt decreases, possibly due to gradient B drift. Furthermore, we present a statistical study on the 19 cusp crossing events from July 2003 to September 2003. The results from the statistical study are consistent with the event studies. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113920
Appears in Collections:气候减缓与适应

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作者单位: School of Space and Environment, Beihang University, Beijing, China; School of Science, Harbin Institute of Technology, Shenzhen, China; Institute of Space Weather, Nanjing University of Information Science and Technology, Nanjing, China; Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China; Institutions of Earth Science, Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Xiao C.,Liu W.,Shen C.,et al. Study on the Curvature and Gradient of the Magnetic Field in Earth's Cusp Region Based on the Magnetic Curvature Analysis Method[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(5)
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