globalchange  > 科学计划与规划
DOI: 10.1002/2014GL062610
论文题名:
Swarm in situ observations of F region polar cap patches created by cusp precipitation
作者: Goodwin L.V.; Iserhienrhien B.; Miles D.M.; Patra S.; Van Der Meeren C.; Buchert S.C.; Burchill J.K.; Clausen L.B.N.; Knudsen D.J.; McWilliams K.A.; Moen J.
刊名: Geophysical Research Letters
ISSN: 0094-8968
EISSN: 1944-8699
出版年: 2015
卷: 42, 期:4
起始页码: 996
结束页码: 1003
语种: 英语
英文关键词: cusp ; gradient drift instability ; in situ ; ionospheric irregularities ; polar cap patch ; swarm
Scopus关键词: Channel flow ; F region ; Ionization ; Cusp ; Gradient-drift instability ; Ionospheric irregularities ; Polar cap patches ; Swarm ; Impact ionization ; channel flow ; convection ; electron density ; F region ; in situ measurement ; ionization ; polar region ; solar radiation ; spacecraft ; tracking ; Scandinavia
英文摘要: High-resolution in situ measurements from the three Swarm spacecraft, in a string-of-pearls configuration, provide new insights about the combined role of flow channel events and particle impact ionization in creating F region electron density structures in the northern Scandinavian dayside cusp. We present a case of polar cap patch formation where a reconnection-driven low-density relative westward flow channel is eroding the dayside solar-ionized plasma but where particle impact ionization in the cusp dominates the initial plasma structuring. In the cusp, density features are observed which are twice as dense as the solar-ionized background. These features then follow the polar cap convection and become less structured and lower in amplitude. These are the first in situ observations tracking polar cap patch evolution from creation by plasma transport and enhancement by cusp precipitation, through entrainment in the polar cap flow and relaxation into smooth patches as they approach the nightside auroral oval. ©2015. The Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84924914189&doi=10.1002%2f2014GL062610&partnerID=40&md5=42d9fa197263f33d79a0df6c7abbfd98
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8584
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: Institute of Space and Atmospheric Studies, Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, SK, Canada

Recommended Citation:
Goodwin L.V.,Iserhienrhien B.,Miles D.M.,et al. Swarm in situ observations of F region polar cap patches created by cusp precipitation[J]. Geophysical Research Letters,2015-01-01,42(4).
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