globalchange  > 科学计划与规划
DOI: 10.1002/2015GL063302
论文题名:
Momentum transfer from solar wind to interplanetary field enhancements inferred from magnetic field draping signatures
作者: Lai H.R.; Russell C.T.; Jia Y.D.; Wei H.Y.; Angelopoulos V.
刊名: Geophysical Research Letters
ISSN: 0094-8844
EISSN: 1944-8575
出版年: 2015
卷: 42, 期:6
起始页码: 1640
结束页码: 1645
语种: 英语
英文关键词: interplanetary field enhancement ; magnetic field draping ; momentum transfer
Scopus关键词: Dust ; Electric fields ; Magnetic fields ; Momentum ; Momentum transfer ; Solar wind ; Downstream region ; Electric-field directions ; Field enhancement ; Flowing plasmas ; Magnetic field strengths ; Momentum exchange ; Three dimensional magnetic fields ; Upstream region ; Magnetism ; acceleration ; magnetic field ; momentum transfer ; solar wind ; streamflow
英文摘要: Characterized by a cusp-shaped enhancement in the magnetic field strength, the magnetic structure in the solar wind, called an interplanetary field enhancement (IFE), has been investigated since its discovery. To understand its three-dimensional magnetic field geometry, we study an IFE detected by five spacecraft simultaneously. Field lines are seen draping around in the upstream region and rotating in the ambient convection electric field direction in the downstream region. Earlier studies suggest that IFEs are created when the solar wind accelerates newly formed dust clouds. Both signatures found in our study support this hypothesis: the field line draping is caused by dust-solar wind momentum exchange, while the field line rotation is a typical signature of dusty plasma pickup. The force that exchanges the momentum is approximately 106 N. This study illustrates the nature of the interaction between two flowing plasmas of very different mass-to-charge ratio. Key Points Upstream magnetic field drapes around the IFE Downstream magnetic field rotates to ambient electric field direction Momentum is transferred from the solar wind to the IFE ©2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84927797552&doi=10.1002%2f2015GL063302&partnerID=40&md5=8a6f7815532a35f1ca6b2910b2026653
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8460
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, CA, United States

Recommended Citation:
Lai H.R.,Russell C.T.,Jia Y.D.,et al. Momentum transfer from solar wind to interplanetary field enhancements inferred from magnetic field draping signatures[J]. Geophysical Research Letters,2015-01-01,42(6).
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