DOI: 10.1002/2016GL069475
论文题名: Distribution of Region 1 and 2 currents in the quiet and substorm time plasma sheet from THEMIS observations
作者: Liu J. ; Angelopoulos V. ; Chu X. ; McPherron R.L.
刊名: Geophysical Research Letters
ISSN: 0094-8818
EISSN: 1944-8549
出版年: 2016
卷: 43, 期: 15 起始页码: 7813
结束页码: 7821
语种: 英语
英文关键词: Birkeland current
; plasma sheet
; Region 1 current
; Region 2 current
; substorm
; substorm current wedge
Scopus关键词: Boundary layers
; Geomagnetism
; Magnetosphere
; Magnetotails
; Neutral sheets
; Plasma sheet
; Plasma sheet boundary layer
; Statistical study
; Substorms
; Triangular configuration
; Plasma sheaths
英文摘要: Although Earth's Region 1 and 2 currents are related to activities such as substorm initiation, their magnetospheric origin remains unclear. Utilizing the triangular configuration of THEMIS probes at 8–12 RE downtail, we seek the origin of nightside Region 1 and 2 currents. Our statistical study reveals that both kinds of currents exist in the plasma sheet during quiet and active times. Region 2 currents are deep inside the plasma sheet; Region 1 currents, which are farther away from the neutral sheet, extend to the plasma sheet boundary layer. At geomagnetic quiet times, the separation between the two currents is located ~2.5 RE from the neutral sheet. During substorms, the separation migrates toward (away from) the neutral sheet as the plasma sheet thins (thickens). These findings suggest that the plasma sheet is a source of Region 1 and 2 currents and its deformation is associated with redistribution of FAC sources in the magnetotail. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84982957556&doi=10.1002%2f2016GL069475&partnerID=40&md5=27da5a9310e4f425bb1151ee87c79a39
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9781
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 and Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA, United States
Recommended Citation:
Liu J.,Angelopoulos V.,Chu X.,et al. Distribution of Region 1 and 2 currents in the quiet and substorm time plasma sheet from THEMIS observations[J]. Geophysical Research Letters,2016-01-01,43(15).