DOI: 10.1002/jgrd.50708
论文题名: A global atmospheric model of meteoric iron
作者: Feng W. ; Marsh D.R. ; Chipperfield M.P. ; Janches D. ; Hoffner J. ; Yi F. ; Plane J.M.C.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 16 起始页码: 9456
结束页码: 9474
语种: 英语
Scopus关键词: Atmospherics
; Dissociation
; Ions
; Iron
; Molecules
; Rockets
; Dissociative recombinations
; Global atmospheric models
; Ion-molecule reaction
; Mass spectrometer data
; Mesosphere and lower thermosphere
; Positive correlations
; Reaction rate coefficients
; Whole atmosphere community climate models
; Atmospheric chemistry
; atmospheric modeling
; climate modeling
; correlation
; ground-based measurement
; iron
; lidar
; mass spectrometry
; mesosphere
; one-dimensional modeling
; seasonal variation
; sensitivity analysis
; thermosphere
; tidal cycle
英文摘要: The first global model of meteoric iron in the atmosphere (WACCM-Fe) has been developed by combining three components: the Whole Atmosphere Community Climate Model (WACCM), a description of the neutral and ion-molecule chemistry of iron in the mesosphere and lower thermosphere (MLT), and a treatment of the injection of meteoric constituents into the atmosphere. The iron chemistry treats seven neutral and four ionized iron containing species with 30 neutral and ion-molecule reactions. The meteoric input function (MIF), which describes the injection of Fe as a function of height, latitude, and day, is precalculated from an astronomical model coupled to a chemical meteoric ablation model (CABMOD). This newly developedWACCM-Fe model has been evaluated against a number of available ground-based lidar observations and performs well in simulating the mesospheric atomic Fe layer. The model reproduces the strong positive correlation of temperature and Fe density around the Fe layer peak and the large anticorrelation around 100 km. The diurnal tide has a significant effect in the middle of the layer, and the model also captures well the observed seasonal variations. However, the model overestimates the peak Fe+ concentration compared with the limited rocket-borne mass spectrometer data available, although good agreement on the ion layer underside can be obtained by adjusting the rate coefficients for dissociative recombination of Fe-molecular ions with electrons. Sensitivity experiments with the same chemistry in a 1-D model are used to highlight significant remaining uncertainties in reaction rate coefficients, and to explore the dependence of the total Fe abundance on the MIF and rate of vertical transport. © 2013. Her Majesty the Queen in Right of Canada. American Geophysical Union. 资助项目: AST-0908118
; ATM-0525655
; ATM-05311464
; ATM-0634650
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63382
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: School of Chemistry, University of Leeds, Leeds, LS2 9JT, United Kingdom; NCAS, School of Earth and Environment, University of Leeds, Leeds, United Kingdom; National Center for Atmospheric Research, Boulder, CO, United States; Space Weather Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Leibniz Institute of Atmospheric Physics, Kuhlungsborn, Germany; School of Electronic Information, Wuhan University, Wuhan, China
Recommended Citation:
Feng W.,Marsh D.R.,Chipperfield M.P.,et al. A global atmospheric model of meteoric iron[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(16)