DOI: 10.1029/2018JA025465
Scopus记录号: 2-s2.0-85052395364
论文题名: Investigating High-Latitude Energy Deposition Events Occurring During the 17 January 2005 Geomagnetic Storm
作者: Horvath I. ; Lovell B.C.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 8 起始页码: 6760
结束页码: 6775
语种: 英语
英文关键词: cusp/polar cap enhancements
; dayside reconnection
; flow channels
; high-latitude boundary layer
; lobe reconnection
; low-latitude boundary layer
英文摘要: This study investigates the coupled ionosphere-thermosphere system during the 17 January 2005 geomagnetic storm. Multiinstrument satellite data are utilized to track polar convection and flow channels (FCs) in the topside ionosphere to compute Poynting flux values approximating electromagnetic energy and to detect localized neutral density increases and also to signal FC signatures in the thermosphere. Our main aim is to identify energy input regions during various events when localized neutral density increases developed. Such events are illustrated in five scenarios covering both hemispheres. These scenarios demonstrate the development of a cusp enhancement above/within FC-1 associated with newly open field lines and polar cap enhancements above/within FC-2, FC-3, and FC-4 commonly associated with old open field lines. Localized Poynting flux intensifications within these FCs demonstrate energy deposition continuing along old open field lines in the polar cap. The close correlation of these Poynting flux intensifications with their respective cusp and polar cap enhancements, via their underlying FCs through which the electromagnetic energy was deposited, provide observational evidence that these enhancements were generated by their associated energy inputs. These observational results lead to the conclusions that a main region of high-latitude energy deposition was (i) the polar cap (>78° magnetic latitude) producing polar cap enhancements (scenarios 1–3), (ii) the prenoon auroral zone producing a cusp enhancement (scenario 4), and (iii) both the polar cap producing a polar cap enhancement and the auroral zone (scenario 5). ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113422
Appears in Collections: 气候减缓与适应
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作者单位: Security and Surveillance Research Group, School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD, Australia
Recommended Citation:
Horvath I.,Lovell B.C.. Investigating High-Latitude Energy Deposition Events Occurring During the 17 January 2005 Geomagnetic Storm[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(8)