globalchange  > 气候减缓与适应
DOI: 10.1029/2018JA025344
Scopus记录号: 2-s2.0-85052501281
论文题名:
The Composition of Plasma inside Geostationary Orbit Based on Van Allen Probes Observations
作者: Yue C.; Bortnik J.; Li W.; Ma Q.; Gkioulidou M.; Reeves G.D.; Wang C.-P.; Thorne R.M.; Lui A.T.Y.; Gerrard A.J.; Spence H.E.; Mitchell D.G.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:8
起始页码: 6478
结束页码: 6493
语种: 英语
英文关键词: ion composition ; plasma pressure ; plasmapause
英文摘要: The composition of the inner magnetosphere is of great importance for determining the plasma pressure and thus the currents and magnetic field configuration. In this study, we perform a statistical survey of equatorial plasma pressure distributions and investigate the relative contributions of ions and electron with different energies inside of geostationary orbit under two auroral electrojet levels based on over 60 months of observations from the Helium, Oxygen, Proton, and Electron and Radiation Belt Storm Probes Ion Composition Experiment mass spectrometers onboard Van Allen Probes. We find that the total and partial pressures of different species increase significantly at high auroral electrojet levels with hydrogen pressure being dominant in the plasmasphere. The pressures of the heavy ions and electrons increase outside the plasmapause and develop a strong dawn-dusk asymmetry with ion pressures peaking at dusk and electron pressure peaking at dawn. In addition, ring current hydrogen with energies ranging from 50 keV up to several hundred keV is the dominant component of plasma pressure during both quiet (>90%) and active times (>60%), while oxygen with 10 < E < 50 keV and electrons with 0.1 < E < 40 keV become important during active times contributing more than 25% and 20% on the nightside, respectively, while the helium contribution is generally small. The results presented in this study provide a global picture of the equatorial plasma pressure distributions and the associated contributions from different species with different energy ranges, which advance our knowledge of wave generation and provide models with a systematic baseline of plasma composition. ©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/113400
Appears in Collections:气候减缓与适应

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作者单位: Department of Atmospheric and Oceanic Sciences, UCLA, Los Angeles, CA, United States; Center for Space Physics, Boston University, Boston, MA, United States; Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States; Space Science and Applications Group, Los Alamos National Laboratory, Los Alamos, NM, United States; Space Sciences Division, New Mexico Consortium, Los Alamos, NM, United States; Center for Solar-Terrestrial Research at New Jersey Institute of Technology, Newark, NJ, United States; Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH, United States

Recommended Citation:
Yue C.,Bortnik J.,Li W.,et al. The Composition of Plasma inside Geostationary Orbit Based on Van Allen Probes Observations[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(8)
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