DOI: 10.1002/2014GL062784
论文题名: Lidar and CTIPe model studies of the fast amplitude growth with altitude of the diurnal temperature "tides" in the Antarctic winter lower thermosphere and dependence on geomagnetic activity
作者: Fong W. ; Chu X. ; Lu X. ; Chen C. ; Fuller-Rowell T.J. ; Codrescu M. ; Richmond A.D.
刊名: Geophysical Research Letters
ISSN: 0094-9003
EISSN: 1944-8734
出版年: 2015
卷: 42, 期: 3 起始页码: 697
结束页码: 704
语种: 英语
英文关键词: adiabatic effects
; Antarctic lower thermosphere
; CTIPe model
; diurnal temperature tides
; Hall ion drag
; lidar observations
Scopus关键词: Drag
; Geomagnetism
; Heating
; Ionosphere
; Joule heating
; Magnetosphere
; Optical radar
; Tides
; Adiabatic effect
; Diurnal temperatures
; Ion drag
; Lidar observation
; Lower thermosphere
; Atmospheric temperature
; adiabatic process
; altitude
; amplitude
; atmospheric electricity
; aurora
; diurnal variation
; geomagnetic field
; ionosphere
; lidar
; thermosphere
; Southern Ocean
英文摘要: Four years of lidar observations at McMurdo reveal that the fast amplitude growth with altitude of diurnal temperature tides from 100 to 110km during Antarctic winters, exceeding that of the freely propagating tides from the lower atmosphere, increases in strength with the Kp magnetic activity index. Simulations with the Coupled Thermosphere Ionosphere Plasmasphere Electrodynamics (CTIPe) model reproduce the lidar observations and exhibit concentric ring structures of diurnal amplitudes encircling the south geomagnetic pole and overlapping the auroral zone. These findings point to a magnetospheric source origin. Mechanistic studies using CTIPe show that the adiabatic cooling/heating associated with Hall ion drag is the dominant source of this feature, while Joule heating is a minor contributor due to the counteraction by Joule-heating-induced adiabatic cooling. The sum of total dynamical effects and Joule heating explains ∼80% of the diurnal amplitudes. Auroral particle heating, lower atmosphere tides, and direct solar heating have minor contributions. © 2015 The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925134634&doi=10.1002%2f2014GL062784&partnerID=40&md5=d33993790beaa3b40ec80222e96e3739
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8619
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: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, BC, United States
Recommended Citation:
Fong W.,Chu X.,Lu X.,et al. Lidar and CTIPe model studies of the fast amplitude growth with altitude of the diurnal temperature "tides" in the Antarctic winter lower thermosphere and dependence on geomagnetic activity[J]. Geophysical Research Letters,2015-01-01,42(3).