DOI: 10.1002/2016GL069649
论文题名: Saturation of superstorms and finite compressibility of the magnetosphere: Results of the magnetogram inversion technique and global PPMLR-MHD model
作者: Mishin V.V. ; Mishin V.M. ; Karavaev Y. ; Han J.P. ; Wang C.
刊名: Geophysical Research Letters
ISSN: 0094-8900
EISSN: 1944-8631
出版年: 2016
卷: 43, 期: 13 起始页码: 6734
结束页码: 6741
语种: 英语
英文关键词: magnetopause standoff distance
; polar cap magnetic flux
; superstorm saturation
Scopus关键词: Compressibility
; Magnetic flux
; Magnetism
; Magnetopause
; Numerical methods
; Solar wind
; Finite compressibility
; Interplanetary magnetic fields
; Magnetogram inversion
; Piecewise parabolic method
; Polar cap
; Saturation process
; Stand-off distance (SoD)
; Superstorms
; Magnetosphere
; compressibility
; geoelectric field
; geomagnetic storm
; magnetic field
; magnetopause
; magnetosphere
; numerical model
; polar region
; saturation
; solar wind
英文摘要: We report on novel features of the saturation process of the polar cap magnetic flux and Poynting flux into the magnetosphere from the solar wind during three superstorms. In addition to the well-known effect of the interplanetary electric (Esw) and southward magnetic (interplanetary magnetic field (IMF) Bz) fields, we found that the saturation depends also on the solar wind ram pressure Pd. By means of the magnetogram inversion technique and a global MHD numerical model Piecewise Parabolic Method with a Lagrangian Remap, we explore the dependence of the magnetopause standoff distance on ram pressure and the southward IMF. Unlike earlier studies, in the considered superstorms both Pd and Bz achieve extreme values. As a result, we show that the compression rate of the dayside magnetosphere decreases with increasing Pd and the southward Bz, approaching very small values for extreme Pd ≥ 15 nPa and Bz ≤ −40 nT. This dependence suggests that finite compressibility of the magnetosphere controls saturation of superstorms. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979010011&doi=10.1002%2f2016GL069649&partnerID=40&md5=d12379ee34d1ebcccd58535bb3062947
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9863
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: ISTP SB RAS, Irkutsk, Russian Federation
Recommended Citation:
Mishin V.V.,Mishin V.M.,Karavaev Y.,et al. Saturation of superstorms and finite compressibility of the magnetosphere: Results of the magnetogram inversion technique and global PPMLR-MHD model[J]. Geophysical Research Letters,2016-01-01,43(13).