Vortex Generation and Auroral Response to a Solar Wind Dynamic Pressure Increase: Event Analyses
Vortex Generation and Auroral Response to a Solar Wind Dynamic Pressure Increase: Event Analyses
复制标题
涡旋产生和极光对太阳风动态压力增加的响应:事件分析
DOI:
10.1029/2020ja028753
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发表时间:
2021-02
期刊:
影响因子:
--
通讯作者:
Jong-Sun Park
中科院分区:
文献类型:
--
作者:
Jinyan Zhao;Quanqi Shi;Anmin Tian;Xiao-Chen Shen;James M Weyg;Huizi Wang;Shutao Yao;Xiao Ma;Alex;er William Degeling;I. Jonathan Rae;Hui Zhang;Xiao-Jia Zhang;Shi-Chen Bai;Wensai Shang;Jong-Sun Park
In this study, we investigate ionospheric responses, including currents and aurorae, to solar wind dynamic pressure (SW Pdyn) sudden increases, which are critical for understanding solar wind-magnetosphere-ionosphere coupling. We focus on two similar SW Pdyn pulse events that occurred on 24 January 2012 and 12 November 2010. In both cases, equivalent ionospheric currents (EIC) vortices were generated within about ten minutes after the pressure pulse arrival, with a counter-clockwise rotating vortex (viewed from above) observed on the dusk side in the former case, and a clockwise vortex observed on the dawn side in the latter. Simultaneous ground-based All-Sky Imager (ASI) observations in the vicinity of the observed EIC vortex in each case showed that aurorae intensified on the dusk side, and diminished on the dawn side. These observations provide direct evidence of the scenario proposed by Shi et al. (2014) that magnetospheric flow vortices generated by a solar wind pressure pulse carry field-aligned currents into the ionosphere and thereby modulate auroral activity. The dawn/dusk asymmetry in the auroral intensification is a direct result of the opposite sense of vortex rotation on the dawn and dusk sides, which generate oppositely directed field-aligned currents into/out of the ionosphere.
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影响因子:
5.2
作者:
Li L.Y.;B.Liu;J.Yu;J.B.Cao
通讯作者:
J.B.Cao
影响因子:
2.8
作者:
Tian A M;Shen X C;Shi Q Q;Tang B B;Nowada M;Zong Q G;Fu S Y
通讯作者:
Fu S Y
影响因子:
2.4
作者:
S. Akasofu
通讯作者:
S. Akasofu
DOI:
10.1002/2013ja019551
发表时间:
2014-06
期刊:
Journal of Geophysical Research: Space Physics
影响因子:
--
作者:
Q. Shi;M. Hartinger;V. Angelopoulos;A. Tian;S. Fu;Q. Zong;J. Weygand;J. Raeder;Z. Pu
通讯作者:
Q. Shi;M. Hartinger;V. Angelopoulos;A. Tian;S. Fu;Q. Zong;J. Weygand;J. Raeder;Z. Pu
DOI:
10.1029/gm099p0245
发表时间:
2013-03
期刊:
Geophysical monograph
影响因子:
--
作者:
M. Neugebauer;R. Goldstein
通讯作者:
M. Neugebauer;R. Goldstein