DOI: 10.1002/2017JA024472
Scopus记录号: 2-s2.0-85040248755
论文题名: SAPS-Associated Explosive Brightening on the Duskside: A New Type of Onset-Like Disturbance
作者: Henderson M.G. ; Morley S.K. ; Kepko L.E.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 1 起始页码: 197
结束页码: 210
语种: 英语
英文关键词: auroral disturbance
; particle injection
; subauroral polarization streams
英文摘要: Quasiperiodic energetic particle injections have been observed at geosynchronous orbit on the duskside during a steady magnetospheric convection event. We examine high-resolution auroral imager data and ground magnetometer data associated with the first of these injections and conclude that it was not associated with classical substorm signatures. It is proposed that these injections are caused by the explosive nonlinear growth of a shear flow-ballooning instability in the region where subauroral polarization streams (SAPS) also occur. It is suggested that interchange will occur preferentially in the low-conductivity SAPS region since the magnetic Richardson number is lowest there and the “line-tying” effect will also be least stabilizing there. We propose that the observed particle injection signatures and auroral morphology constitute a new type of SAPS-associated explosive “onset-like” disturbance that can occur during intervals of strong convection. ©2017. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114847
Appears in Collections: 气候减缓与适应
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作者单位: Los Alamos National Laboratory, Los Alamos, NM, United States; NASA/Goddard Space Flight Center, Greenbelt, MD, United States
Recommended Citation:
Henderson M.G.,Morley S.K.,Kepko L.E.. SAPS-Associated Explosive Brightening on the Duskside: A New Type of Onset-Like Disturbance[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(1)