DOI: 10.1002/2013GL057627
论文题名: Two-dimensional simulation of ionospheric variations in the vicinity of the epicenter of the Tohoku-oki earthquake on 11 March 2011
作者: Shinagawa H. ; Tsugawa T. ; Matsumura M. ; Iyemori T. ; Saito A. ; Maruyama T. ; Jin H. ; Nishioka M. ; Otsuka Y.
刊名: Geophysical Research Letters
ISSN: 0094-8496
EISSN: 1944-8227
出版年: 2013
卷: 40, 期: 19 起始页码: 5009
结束页码: 5013
语种: 英语
英文关键词: atmosphere
; earthquake
; ionosphere
; model
; variation
; wave
Scopus关键词: Atmospheric perturbations
; Inclined magnetic fields
; Ionospheric variations
; Tohoku-Oki earthquakes
; Total electron content
; Two-dimensional simulations
; variation
; Vertical displacements
; Earth atmosphere
; Ionosphere
; Ionospheric measurement
; Models
; Two dimensional
; Waves
; Earthquakes
; electron
; ionosphere
; nonlinearity
; numerical model
; pressure effect
; sea surface
; Tohoku earthquake 2011
; two-dimensional modeling
; uplift
英文摘要: Unusual ionospheric variations were observed in the M9.0 Tohoku-oki earthquake on 11 March 2011. Among various kinds of features in the ionosphere, significant depletion of total electron content (TEC) near the epicenter was observed after the earthquake. Although previous studies have suggested that the coseismic ionospheric variations are associated with atmospheric perturbation caused by vertical displacement of the sea surface, the mechanism of the TEC depletion has not been fully understood. In this paper, a two-dimensional nonlinear nonhydrostatic compressible atmosphere-ionosphere model is employed to investigate the ionospheric variations in the vicinity of the epicenter. The simulation results reveal that an impulsive pressure pulse produced by a sudden uplift of the sea surface leads to local atmospheric expansion in the thermosphere and that the expansion of the thermosphere combined with the effect of inclined magnetic field lines in the ionosphere causes the sudden TEC depletion above the epicenter region. Key Points Coseismic ionospheric variations near the epicenter are simulated Observed coseismic TEC variation is reproduced Shock pulse generated by surface uplift produces the variation ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885497674&doi=10.1002%2f2013GL057627&partnerID=40&md5=9eeceb0cbae29f38d77b1dc55292f776
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5760
Appears in Collections: 气候减缓与适应
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作者单位: National Institute of Information and Communications Technology, 4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan
Recommended Citation:
Shinagawa H.,Tsugawa T.,Matsumura M.,et al. Two-dimensional simulation of ionospheric variations in the vicinity of the epicenter of the Tohoku-oki earthquake on 11 March 2011[J]. Geophysical Research Letters,2013-01-01,40(19).