globalchange  > 气候减缓与适应
DOI: 10.1002/2017JA024981
Scopus记录号: 2-s2.0-85044514356
论文题名:
Study of the Equatorial and Low-Latitude Electrodynamic and Ionospheric Disturbances During the 22–23 June 2015 Geomagnetic Storm Using Ground-Based and Spaceborne Techniques
作者: Astafyeva E.; Zakharenkova I.; Hozumi K.; Alken P.; Coïsson P.; Hairston M.R.; Coley W.R.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:3
起始页码: 2424
结束页码: 2440
语种: 英语
英文关键词: disturbance dynamo ; equatorial electrojet (EEJ) ; geomagnetic storm ; low-latitude ionosphere ; prompt penetration electric fields (PPEF) ; thermospheric winds
英文摘要: We use a set of ground-based instruments (Global Positioning System receivers, ionosondes, magnetometers) along with data of multiple satellite missions (Swarm, C/NOFS, DMSP, GUVI) to analyze the equatorial and low-latitude electrodynamic and ionospheric disturbances caused by the geomagnetic storm of 22–23 June 2015, which is the second largest storm in the current solar cycle. Our results show that at the beginning of the storm, the equatorial electrojet (EEJ) and the equatorial zonal electric fields were largely impacted by the prompt penetration electric fields (PPEF). The PPEF were first directed eastward and caused significant ionospheric uplift and positive ionospheric storm on the dayside, and downward drift on the nightside. Furthermore, about 45 min after the storm commencement, the interplanetary magnetic field (IMF) Bz component turned northward, leading to the EEJ changing sign to westward, and to overall decrease of the vertical total electron content (VTEC) and electron density on the dayside. At the end of the main phase of the storm, and with the second long-term IMF Bz southward turn, we observed several oscillations of the EEJ, which led us to conclude that at this stage of the storm, the disturbance dynamo effect was already in effect, competing with the PPEF and reducing it. Our analysis showed no significant upward or downward plasma motion during this period of time; however, the electron density and the VTEC drastically increased on the dayside (over the Asian region). We show that this second positive storm was largely influenced by the disturbed thermospheric conditions. ©2018. The Authors.
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被引频次[WOS]:56   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114319
Appears in Collections:气候减缓与适应

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作者单位: Institut de Physique du Globe de Paris, Paris Sorbonne Cité, University Paris Diderot, UMR CNRS 7154, Paris, France; West Department of IZMIRAN, Kaliningrad, Russian Federation; National Institute of Information and Communications Technology, Tokyo, Japan; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; The W. B Hanson Center for Space Sciences, University of Texas at Dallas, Richardson, TX, United States

Recommended Citation:
Astafyeva E.,Zakharenkova I.,Hozumi K.,et al. Study of the Equatorial and Low-Latitude Electrodynamic and Ionospheric Disturbances During the 22–23 June 2015 Geomagnetic Storm Using Ground-Based and Spaceborne Techniques[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(3)
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