DOI: 10.1002/2015GL063994
论文题名: Two-dimensional configuration of the magnetotail current sheet: THEMIS observations
作者: Artemyev A.V. ; Petrukovich A.A. ; Nakamura R. ; Zelenyi L.M.
刊名: Geophysical Research Letters
ISSN: 0094-9306
EISSN: 1944-9037
出版年: 2015
卷: 42, 期: 10 起始页码: 3662
结束页码: 3667
语种: 英语
英文关键词: current sheet
; magnetotail
; reconnection
Scopus关键词: Magnetic fields
; Magnetism
; Spacecraft
; Current sheet model
; Current sheets
; Magnetic field amplitudes
; Magnetotail current sheet
; Magnetotails
; Reconnection
; Successive crossings
; Vertical velocity
; Magnetoplasma
; amplitude
; magnetic field
; magnetotail
; plasma
; spacecraft
; temporal analysis
; two-dimensional modeling
英文摘要: In this paper we investigate 2-D configuration of the magnetotail current sheet. We use measurements of magnetic field and plasma parameters by Time History of Events and Macroscale Interactions during Substorms (THEMIS) mission in 2008-2009 to restore for the first time the current sheet configuration at three distances downtail (i.e., in the corresponding locations of THEMIS spacecraft: x <- 25RE , x ∼- 17RE , and x ∼- 10RE ). The vertical velocity of current sheets (flapping motion) allows estimating the current sheet thickness L(x) and the current density j0 (x)≈(c/4π)B0 /L, where B0 (x) is the amplitude of Bx field. We have shown that the current sheet configuration is more or less stable (spacecraft observe the same current sheet thickness and magnetic field amplitudes for successive crossings of the neutral plane) for time intervals around 1-3 h. The typical 2-D configuration of the magnetotail current sheet assumes the increase of L(x) and magnetic fields B0 (x), Bz (x) toward the Earth, while the ratio Bz /B0 is almost constant along the magnetotail. Observed current sheets are very stretched with the typical scale of Bz (x) inhomogeneity Lx LB0 /2Bz . We compare obtained results with existing current sheet models. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931561750&doi=10.1002%2f2015GL063994&partnerID=40&md5=99cbc0407322002bd73a582098354012
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8922
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Space Research Institute, RAS, Moscow, Russian Federation
Recommended Citation:
Artemyev A.V.,Petrukovich A.A.,Nakamura R.,et al. Two-dimensional configuration of the magnetotail current sheet: THEMIS observations[J]. Geophysical Research Letters,2015-01-01,42(10).