DOI: 10.1029/2018JA025240
Scopus记录号: 2-s2.0-85052435064
论文题名: Global Three-Dimensional Simulation of the Earth's Magnetospheric and Ionospheric Responses to Small-Scale Magnetic Flux Ropes in the Solar Wind
作者: Park K.S. ; Lee D.-Y. ; Kim M.J. ; Choi C.R. ; Kim R.S. ; Cho K. ; Choi K.-C. ; Kim J.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 8 起始页码: 6307
结束页码: 6325
语种: 英语
英文关键词: cross-polar cap potential
; dayside and tail region
; dayside reconnection
; global MHD simulation
; magnetosphere and ionosphere response
; small-scale magnetic flux rope
英文摘要: The orientation of magnetic flux ropes in the solar wind is an important component that affects interactions with the Earth's magnetosphere and ionosphere. In this study, we performed global magnetohydrodynamic (MHD) simulations on the responses of the magnetosphere and ionosphere to the impact of small-scale magnetic flux ropes (SMFRs). We considered four types of SMFR structures according to the alignment direction of the flux rope axis in the plane perpendicular to the Sun-Earth line. The flux rope axis of the two types is oriented in the north-south direction, while the flux rope axis of the other two types is oriented along the dusk-dawn direction. Accordingly, the By and Bz profiles of the SMFR types vary as the SMFR passes through the Earth. The main features of the response are as follows: (i) The magnetic reconnection on both the dayside and nightside is well organized by the specific profiles of By and Bz. (ii) One type of SMFRs where Bz turns from south to north and By remains duskward leads to plasmoid formation in the tail, distinguishing it from the other types. (iii) The temporal responses of the tail plasma flow, cross-tail electric field, tail plasma pressure, and cross-polar cap potential depend on the specific profiles of By and Bz, causing different response times. (iv) The evolution of ionospheric convection pattern sensitively depends on the magnetic field variation within SMFRs. (v) The peak value of cross-polar cap potential ranges from 25 kV to >50 kV, providing energy storage suitable for substorm expansion. ©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/113308
Appears in Collections: 气候减缓与适应
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作者单位: Department Astronomy and Space Science, Chungbuk National University, Cheongju, South Korea; Korea Astronomy and Space Science Institute, Daejeon, South Korea; University of Science and Technology, Daejeon, South Korea; Selab, Inc., Seoul, South Korea; Korean Space Weather Center of the National Radio Research Agency, Jeju, South Korea
Recommended Citation:
Park K.S.,Lee D.-Y.,Kim M.J.,et al. Global Three-Dimensional Simulation of the Earth's Magnetospheric and Ionospheric Responses to Small-Scale Magnetic Flux Ropes in the Solar Wind[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(8)