DOI: 10.1002/2015GL065061
论文题名: Characteristics of extreme geoelectric fields and their possible causes: Localized peak enhancements
作者: Ngwira C.M. ; Pulkkinen A.A. ; Bernabeu E. ; Eichner J. ; Viljanen A. ; Crowley G.
刊名: Geophysical Research Letters
ISSN: 0094-9612
EISSN: 1944-9343
出版年: 2015
卷: 42, 期: 17 起始页码: 6916
结束页码: 6921
语种: 英语
英文关键词: auroral substorms
; geomagnetic superstorms
; geomagnetically induced currents
; localized electric fields
; magnetosphere-ionosphere dynamics
Scopus关键词: Electric fields
; Geomagnetism
; Ionosphere
; Ionospheric measurement
; Magnetosphere
; Dynamic magnetospheres
; Field enhancement
; Geomagnetic storm
; Geomagnetically induced currents
; Physical process
; Single sites
; Substorms
; Superstorms
; Storms
; aurora
; extreme event
; geoelectric field
; geomagnetic field
; global change
; ionosphere
; magnetosphere
; peak acceleration
; regional climate
; storm
英文摘要: One of the major challenges pertaining to extreme geomagnetic storms is to understand the basic processes associated with the development of dynamic magnetosphere-ionosphere currents, which generate large induced surface geoelectric fields. Previous studies point out the existence of localized peak geoelectric field enhancements during extreme storms. We examined induced global geoelectric fields derived from ground-based magnetometer recordings for 12 extreme geomagnetic storms between the years 1982 and 2005. For the present study two important extreme storms, 29 October 2003 and 13 March 1989, are shown. The primary purpose of this paper is to provide further evidence on the existence of localized peak geoelectric field enhancements and to show that the structure of the geoelectric field during these localized extremes at single sites can differ greatly from globally and regionally averaged fields. Although the physical processes that govern the development of these localized extremes are still not clear, we discuss some possible causes. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84943358491&doi=10.1002%2f2015GL065061&partnerID=40&md5=28242a76b2d10da3acef1679e3da7d95
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9227
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Physics, Catholic University of America, Washington, DC, United States
Recommended Citation:
Ngwira C.M.,Pulkkinen A.A.,Bernabeu E.,et al. Characteristics of extreme geoelectric fields and their possible causes: Localized peak enhancements[J]. Geophysical Research Letters,2015-01-01,42(17).