Steve: The Optical Signature of Intense Subauroral Ion Drifts

被引：50

作者：

Archer, W. E. ^{[1
]}

Gallardo-Lacourt, B. ^{[2
]}

Perry, G. W. ^{[2
,3
]}

St-Maurice, J. P. ^{[1
,4
]}

Buchert, S. C. ^{[4
,5
]}

Donovan, E. ^{[2
]}

机构：

[1] Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK, Canada

[2] Univ Calgary, Dept Phys & Astron, Calgary, AB, Canada

[3] New Jersey Inst Technol, Ctr Solar Terr Res, Newark, NJ 07102 USA

[4] Univ Western Ontario, Dept Phys & Astron, London, ON, Canada

[5] Swedish Inst Space Phys, Uppsala, Sweden

来源：

GEOPHYSICAL RESEARCH LETTERS | 2019年 / 46卷 / 12期

基金：

美国国家科学基金会;

关键词：

ionosphere; Swarm satellites; SAID; Steve; ELECTRON TEMPERATURES; F-REGION; EXCITATION; PROFILE; TROUGH; ARRAY; ARCS;

D O I：

10.1029/2019GL082687

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Little is currently known about the optical phenomenon known as Steve. The first scientific publication on the subject suggests that Steve is associated with an intense subauroral ion drift (SAID). However, additional inquiry is warranted as this suggested relationship as it is based on a single case study. Here we present eight occurrences of Steve with coincident or near-coincident measurements from the European Space Agency's Swarm satellites and show that Steve is consistently associated with SAID. When satellite observations coincident with Steve are compared to that of typical SAID, we find the SAID associated with Steve to have above average peak ion velocities and electron temperatures, as well as extremely low plasma densities.

引用

页码：6279 / 6286

页数：8

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