DOI: 10.1029/2017JA025097
Scopus记录号: 2-s2.0-85050274544
论文题名: Semianalytical Estimation of Energy Deposition in the Ionosphere by Monochromatic Alfvén Waves
作者: Verkhoglyadova O.P. ; Meng X. ; Mannucci A.J. ; McGranaghan R.M.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 6 起始页码: 5210
结束页码: 5222
语种: 英语
英文关键词: energy transport
; geomagnetic storm
; heating
; ionosphere
; thermosphere
; ULF waves
英文摘要: For the first time we derive an analytical expression for energy deposition by propagating monochromatic Alfvén waves in the collisional ionosphere-thermosphere (IT). Based on empirical models of IT parameters, we show an approximately 10% increase in efficiency of energy deposition at high latitudes and about 150 km altitude by Alfvén waves at 5 Hz as compared to static fields of the same magnitude. We analyze the dependence of the wave energy deposition on geomagnetic activity through a Global Ionosphere-Thermosphere Model (GITM) simulation of IT conditions during the 13–14 October 2016 geomagnetic storm. The peak Alfvén wave contribution occurs in the E layer and lower part of the F layer. Wave-induced heating is shown to increase in the daytime and postdusk high-latitude F layer during the storm due to increased wave-modified conductivity. We estimate that the Alfvén wave contribution to the IT energy budget can reach about 30% of the value of static Joule heating during a strong storm and that the actual percentage increase is dependent on latitude and altitude. This effect carries important implications for ionospheric dynamics, especially for density enhancement in the daytime cusp, heating in the vicinity of auroral arcs and ion outflow. ©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/113745
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; University Corporation for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Verkhoglyadova O.P.,Meng X.,Mannucci A.J.,et al. Semianalytical Estimation of Energy Deposition in the Ionosphere by Monochromatic Alfvén Waves[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(6)