DOI: 10.1029/2017JA025154
Scopus记录号: 2-s2.0-85050503425
论文题名: Temporal Variation of Solar Wind in Controlling Solar Wind-Magnetosphere-Ionosphere Energy Budget
作者: Liu J. ; Wang W. ; Zhang B. ; Huang C. ; Lin D.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 7 起始页码: 5862
结束页码: 5869
语种: 英语
英文关键词: energy coupling
; solar wind-magnetosphere-ionosophere coupling
英文摘要: Periodic oscillations associated with Alfven waves with periods ranging from several tens of minutes to several hours are commonly seen in the solar wind. It is not yet known how the solar wind oscillation frequency, and thus its temporal variation, regulates the energy flow through the coupled solar wind-magnetosphere-ionosphere-thermosphere system. Utilizing the Coupled Magnetosphere-Ionosphere-Thermosphere Model driven by solar wind and interplanetary magnetic field (IMF), we have analyzed the magnetosphere-ionosphere-thermosphere system response to IMF Bz oscillations with periods of 10, 30, and 60 min from the perspective of energy budget. Our results indicate that the energy flow from the solar wind to geospace depends on the IMF Bz oscillation frequency. The energy coupling efficiency, defined as the ratio of the globally integrated joule heating to Akasofu's Epsilon function, is higher for lower frequency IMF Bz oscillations. Joule heating in the upper atmosphere depends not only on directly driven processes due to solar wind variability but also on the intrinsic dynamics of the magnetosphere (i.e., loading-unloading process). This work highlights the critical role of solar wind and IMF temporal variation and the inductive inertia and resistance of coupled magnetosphere-ionosphere system in controlling the energy transfer in the coupled solar wind-geospace system, which has not been explored before. ©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/113616
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, United States; Air Force Research Laboratory, Kirtland AFB, Albuquerque, NM, United States; Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
Recommended Citation:
Liu J.,Wang W.,Zhang B.,et al. Temporal Variation of Solar Wind in Controlling Solar Wind-Magnetosphere-Ionosphere Energy Budget[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(7)