DOI: 10.1002/jgrd.50315
论文题名: The effect of recombination and attachment on meteor radar diffusion coefficient profiles
作者: Lee C.S. ; Younger J.P. ; Reid I.M. ; Kim Y.H. ; Kim J.-H.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 7 起始页码: 3037
结束页码: 3043
语种: 英语
Scopus关键词: Dissociation
; Ionization of gases
; Magnetohydrodynamics
; Radar
; Ambipolar diffusion coefficients
; Atmospheric ions
; Dissociative recombinations
; Earth observing system microwave limb sounders
; Free electron
; Meteor radars
; Neutral molecules
; Satellite instruments
; Diffusion
; Aura (satellite)
; data set
; electron
; EOS
; numerical model
; radar
; satellite imagery
; trend analysis
; Antarctica
英文摘要: Estimates of the ambipolar diffusion coefficient producedusing meteor radar echo decay times display an increasing trend below 80-85 km, which is inconsistent with a diffusion-only theory of the evolution of meteor trails. Data from the 33 MHz meteor radar at King Sejong Station, Antarctica, have been compared with observations from the Aura Earth Observing System Microwave Limb Sounder satellite instrument. It has been found that the height at which the diffusion coefficient gradient reverses follows the height of a constant neutral atmospheric density surface. Numerical simulations of meteor trail diffusion including dissociative recombination with atmospheric ions and three-body attachment of free electrons to neutral molecules indicate that three-body attachment is responsible for the distortion of meteor radar diffusion coefficient profiles at heights below 90 km, including the gradient reversal below 80-85 km. Further investigation has revealed that meteor trails with low initial electron line density produce decay times more consistent with a diffusion-only model of meteor trail evolution. © 2013. American Geophysical Union. All Rights Reserved. 资助项目: DP1096901
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63835
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Astronomy and Space Science, Chungnam National University, Yuseong-gu, Daejeon, South Korea; School of Chemistry and Physics, University of Adelaide, Adelaide, SA 5005, Australia; ATRAD Pty. Ltd., Thebarton, SA, Australia; Korea Polar Research Institute, Yeonsu-gu, Incheon, South Korea
Recommended Citation:
Lee C.S.,Younger J.P.,Reid I.M.,et al. The effect of recombination and attachment on meteor radar diffusion coefficient profiles[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(7)