DOI: 10.1002/2013GL056737
论文题名: Influences of the interplanetary magnetic field clock angle and cone angle on the field-aligned currents in the magnetotail
作者: Cheng Z.W. ; Shi J.K. ; Dunlop M. ; Liu Z.X.
刊名: Geophysical Research Letters
ISSN: 0094-8453
EISSN: 1944-8184
出版年: 2013
卷: 40, 期: 20 起始页码: 5355
结束页码: 5359
语种: 英语
英文关键词: field-aligned currents
; interplanetary magnetic field
; magnetotail
Scopus关键词: Cone angle
; Field aligned currents
; Interplanetary magnetic fields
; Keypoints
; Magnetotails
; Plasma sheet boundary layer
; Single components
; Magnetic fields
; Clocks
; boundary layer
; IMF
; magnetic field
; magnetotail
; plasma
英文摘要: The influences of the interplanetary magnetic field (IMF) cone angle θ and clock angle φ on the field-aligned currents (FACs) at the plasma sheet boundary layers (PSBLs) have been investigated using Cluster Data. The FAC occurrence increases monotonically with IMF cone angle and has two peaks at -90° and +110° clock angle, respectively. The peak at +110° is distinctly larger than that at -90°. Overall, there are more FACs between 0° < φ < 180°, indicating that FACs occurrence is closely associated with duskward IMF. More FACs occur when 90° < |φ| < 180°, implying that FAC is closely associated with southward IMF. The large FAC densities occur when 60° < |φ| < 120°. The density also has two peaks and the peak at +90° clock angle (duskward IMF) is larger than that at -90° (dawnward IMF). These results indicate that the IMF influence on the FACs is from all IMF components and not only from a single component. Key Points The FACs occurrence at PSBL is controlled by IMF cone angle and clock angle The occurrence rate of FACs increases monotonically with IMF cone angle IMF clock angle is a better parameter to determine the large FAC density ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887046442&doi=10.1002%2f2013GL056737&partnerID=40&md5=b8c2815f8fc0bf7d8b73f7d365c8e0b4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5717
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China
Recommended Citation:
Cheng Z.W.,Shi J.K.,Dunlop M.,et al. Influences of the interplanetary magnetic field clock angle and cone angle on the field-aligned currents in the magnetotail[J]. Geophysical Research Letters,2013-01-01,40(20).