DOI: 10.1002/2017JA025054
Scopus记录号: 2-s2.0-85046375516
论文题名: The Cross-Polar Cap Saturation in GUMICS-4 During High Solar Wind Driving
作者: Lakka A. ; Pulkkinen T.I. ; Dimmock A.P. ; Myllys M. ; Honkonen I. ; Palmroth M.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 5 起始页码: 3320
结束页码: 3332
语种: 英语
英文关键词: Alfvén Mach number
; global MHD
; GUMICS-4
; polar cap potential saturation
; reconnection
; solar wind-magnetosphere coupling
英文摘要: It is well known that the Earth's ionospheric cross-polar cap potential (CPCP) saturates as a response to the solar wind (SW) driver especially when the level of driving is high and the interplanetary magnetic field is oriented southward. Moreover, previous studies have shown that the upstream Alfvén Mach number may be an important factor in the saturation effect. While the CPCP is often viewed as a measure of the SW-magnetosphere-ionosphere coupling, the processes associated with the nonlinearity of the coupling remain an open issue. We use fourth edition of the Grand Unified Magnetosphere-Ionosphere Coupling Simulation (GUMICS-4) and artificial SW data to mimic weak and strong driving in order to study the CPCP response to a wide range of interplanetary magnetic field magnitudes (3.5–30 nT) and upstream Alfvén Mach number values (1.2–22). The results provide the first overview of the CPCP saturation in GUMICS-4 and show that the onset of saturation is strongly dependent on the upstream Alfvén Mach number and the physical processes responsible for the saturation effect might take place both in the Earth's magnetosheath and in the upstream SW. ©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/114043
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Electronics and Nanoengineering, Aalto University, Espoo, Finland; Swedish Institute of Space Physics, Uppsala, Sweden; Department of Physics, University of Helsinki, Helsinki, Finland; Laboratoire de Physique et Chimie de l'Environnement et de l'Espace, CNRS, Orléans, France; Finnish Meteorological Institute, Helsinki, Finland
Recommended Citation:
Lakka A.,Pulkkinen T.I.,Dimmock A.P.,et al. The Cross-Polar Cap Saturation in GUMICS-4 During High Solar Wind Driving[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(5)