DOI: 10.1002/2017JA024336
Scopus记录号: 2-s2.0-85041033258
论文题名: One-Dimensional Full Wave Simulation of Equatorial Magnetosonic Wave Propagation in an Inhomogeneous Magnetosphere
作者: Liu X. ; Chen L. ; Yang L. ; Xia Z. ; Malaspina D.M.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 1 起始页码: 587
结束页码: 599
语种: 英语
英文关键词: fine-scale density structure
; finite difference time domain
; magnetosonic wave
; plasmapause
英文摘要: The effect of the plasmapause on equatorially radially propagating fast magnetosonic (MS) waves in the Earth's dipole magnetic field is studied by using finite difference time domain method. We run 1-D simulation for three different density profiles: (1) no plasmapause, (2) with a plasmapause, and (3) with a plasmapause accompanied with fine-scale density irregularity. We find that (1) without plasmapause the radially inward propagating MS wave can reach ionosphere and continuously propagate to lower altitude if no damping mechanism is considered. The wave properties follow the cold plasma dispersion relation locally along its trajectory. (2) For simulation with a plasmapause with a scale length of 0.006 RE compared to wavelength, only a small fraction of the MS wave power is reflected by the plasmapause. WKB approximation is generally valid for such plasmapause. (3) The multiple fine-scale density irregularities near the outer edge of plasmapause can effectively block the MS wave propagation, resulting in a terminating boundary for MS waves near the plasmapause. ©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/114766
Appears in Collections: 气候减缓与适应
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作者单位: William B. Hanson Center for Space Sciences, University of Texas at Dallas, Richardson, TX, United States; Department of Communication Engineering, Jiangsu University, Jiangsu, China; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States
Recommended Citation:
Liu X.,Chen L.,Yang L.,et al. One-Dimensional Full Wave Simulation of Equatorial Magnetosonic Wave Propagation in an Inhomogeneous Magnetosphere[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(1)