globalchange  > 气候减缓与适应
DOI: 10.1029/2018JA025232
Scopus记录号: 2-s2.0-85051244496
论文题名:
Plasma Anisotropies and Currents in the Near-Earth Plasma Sheet and Inner Magnetosphere
作者: Artemyev A.V.; Zhang X.-J.; Angelopoulos V.; Runov A.; Spence H.E.; Larsen B.A.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:7
起始页码: 5625
结束页码: 5639
语种: 英语
英文关键词: injections ; inner magnetosphere ; plasma currents ; plasma sheet
英文摘要: The region occupying radial distances of ∼3–9 Earth radii (RE) in the nightside includes the near-Earth plasma sheet with stretched magnetic field lines and the inner magnetosphere with strong dipolar magnetic field. In this region, the plasma flow energy, which was injected into the inner magnetosphere from the magnetotail, is converted to particle heating and electromagnetic wave generation. These important processes are controlled by plasma anisotropies, which are the focus of this study. Using measurements of Time History of Events and Macroscale Interactions during Substorms and Van Allen Probes in this transition region we obtain radial profiles of ion and electron temperatures and anisotropies for various geomagnetic activity levels. Ion and electron anisotropies vary with the geomagnetic activity in opposite directions. Parallel anisotropic ions are observed together with transversely anisotropic electrons, whereas the change of ion anisotropy from parallel to transverse (with increasing Kp) is accompanied by the electron anisotropy changing from transverse to parallel. Based on plasma anisotropy observations, we estimate that the anisotropy-related currents (curvature currents) are about 10–20% of the diamagnetic currents. ©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/113605
Appears in Collections:气候减缓与适应

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作者单位: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA, United States; Space Research Institute, RAS, Moscow, Russian Federation; Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH, United States; Space Science and Applications, Los Alamos National Laboratory, Los Alamos, NM, United States; New Mexico Consortium, Los Alamos, NM, United States

Recommended Citation:
Artemyev A.V.,Zhang X.-J.,Angelopoulos V.,et al. Plasma Anisotropies and Currents in the Near-Earth Plasma Sheet and Inner Magnetosphere[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(7)
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