DOI: 10.1002/2017JA024573
Scopus记录号: 2-s2.0-85044531785
论文题名: MLT Plasmapause Characteristics: Comparison Between THEMIS Observations and Numerical Simulations
作者: Verbanac G. ; Bandić M. ; Pierrard V. ; Cho J.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 3 起始页码: 2000
结束页码: 2017
语种: 英语
英文关键词: geomagnetic activity
; MLT plasmapause (PP) formation and propagation
; PP response to solar wind
英文摘要: We perform a statistical comparison of the global behavior of the THEMIS observed and simulated plasmapause in the geomagnetic equatorial plane. Simulation is based on the interchange instability mechanism. Analyzing plasmapause positions (LPPs) from the period July 2008 to December 2012, we derived formation and propagation characteristics of the main plasmapause, which reflect the most probable global plasmapause behavior. The results suggest a global eastward azimuthal plasmapause propagation and a radial plasmapause motion limited to the 21–07 MLT sector. The formation of the plasmapause takes place with the highest probability at postmidnight. It is likely that the erosion occurs in a range of MLTs simultaneously. On the dayside, the plasmapause moves almost entirely azimuthally. We suggest that the plasmapause propagates azimuthally with a mean angular velocity close to the corotation speed at all MLTs, at least during periods of lower geomagnetic activity. The results also show that the experimental plasmapause characteristics are in accordance with the interchange instability mechanism. Along with the proposed suggestions for future works, this study contributes to making a further step toward resolving some of the long-lasting, unresolved issues related to plasmapause dynamics. ©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/114327
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia; Zagreb Astronomical Observatory, Zagreb, Croatia; Royal Belgian Institute for Space Aeronomy (Space Physics and STCE), Brussels, Belgium; Earth and Life Institute, TECLIM, Université Catholique de Louvain, Louvain-La-Neuve, Belgium; Department of Astronomy and Space Science, Chungbuk National University, Cheongju, South Korea
Recommended Citation:
Verbanac G.,Bandić M.,Pierrard V.,et al. MLT Plasmapause Characteristics: Comparison Between THEMIS Observations and Numerical Simulations[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(3)