DOI: 10.1002/2016GL068607
论文题名: Implications of L1 observations for slow solar wind formation by solar reconnection
作者: Kepko L. ; Viall N.M. ; Antiochos S.K. ; Lepri S.T. ; Kasper J.C. ; Weberg M.
刊名: Geophysical Research Letters
ISSN: 0094-9021
EISSN: 1944-8752
出版年: 2016
卷: 43, 期: 9 起始页码: 4089
结束页码: 4097
语种: 英语
英文关键词: periodic density structures
; S-Web
; slow solar wind formation
; solar reconnection
; solar wind composition
Scopus关键词: Magnetoplasma
; Periodic structures
; Structure (composition)
; Composition measurements
; Composition variation
; Magnetic reconnections
; Periodic density
; Quasi-periodic structures
; S-Web
; Slow solar wind formation
; Solar reconnection
; Solar wind
; magnetic field
; plasma
; solar power
; timescale
; wind forcing
; wind power
; wind velocity
; World Wide Web
英文摘要: While the source of the fast solar wind is known to be coronal holes, the source of the slow solar wind has remained a mystery. Long time scale trends in the composition and charge states show strong correlations between solar wind velocity and plasma parameters, yet these correlations have proved ineffective in determining the slow wind source. We take advantage of new high time resolution (12 min) measurements of solar wind composition and charge state abundances at L1 and previously identified 90 min quasiperiodic structures to probe the fundamental timescales of slow wind variability. The combination of new high temporal resolution composition measurements and the clearly identified boundaries of the periodic structures allows us to utilize these distinct solar wind parcels as tracers of slow wind origin and acceleration. We find that each 90 min (2000 Mm) parcel of slow wind has near-constant speed yet exhibits repeatable, systematic charge state and composition variations that span the entire range of statistically determined slow solar wind values. The classic composition-velocity correlations do not hold on short, approximately hourlong, time scales. Furthermore, the data demonstrate that these structures were created by magnetic reconnection. Our results impose severe new constraints on slow solar wind origin and provide new, compelling evidence that the slow wind results from the sporadic release of closed field plasma via magnetic reconnection at the boundary between open and closed flux in the Sun's atmosphere. © 2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84992311466&doi=10.1002%2f2016GL068607&partnerID=40&md5=279e2c44eaf1a94624a17b08d0e6ffec
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9984
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: NASA Goddard Space Flight Center, Greenbelt, MD, United States
Recommended Citation:
Kepko L.,Viall N.M.,Antiochos S.K.,et al. Implications of L1 observations for slow solar wind formation by solar reconnection[J]. Geophysical Research Letters,2016-01-01,43(9).