DOI: 10.1002/2017JD027218
论文题名: Impacts of meteoric sulfur in the Earth's atmosphere
作者: Gómez Martín J.C. ; Brooke J.S.A. ; Feng W. ; Höpfner M. ; Mills M.J. ; Plane J.M.C.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 14 起始页码: 7678
结束页码: 7701
语种: 英语
英文关键词: ablation
; atmospheric sulfur budget
; cosmic dust
; sulfur
英文摘要: A meteoric sulfur input function and a sulfur ion chemistry scheme have been incorporated into a chemistry-climate model, in order to study the speciation of sulfur between the stratosphere and the thermosphere (~20–120 km) and the impact of the sulfur input from ablation of cosmic dust. The simulations have been compared to rocket observations of SO+ between 85 and 110 km, MIPAS observations of SO2 between 20 and 45 km, and stratospheric balloon-borne measurements of H2SO4 vapor and sulfate aerosol. These observations constrain the present-day global flux of meteoric sulfur to ≤1.0 t S d−1, i.e., 2 orders of magnitude smaller than the flux of S into the stratosphere from OCS photooxidation and explosive volcanic SO2 injection. However, the meteoric sulfur flux is strongly focused into the polar vortices by the meridional circulation, and therefore, the contribution of SO2 of meteoric origin to the polar upper stratosphere during winter is substantial (~ 30% at 50 km for a flux of 1.0 t S d−1). The Antarctic spring sulfate aerosol layer is found to be very sensitive to a moderate increase of the input rate of meteoric sulfur, showing a factor of 2 enhancement in total sulfate aerosol number density at 30 km for an input of 3.0 t S d−1. The input rate estimate of 1.0 t S d−1 suggests an enrichment of sodium relative to sulfur of 2.7 ± 1.5 and is consistent with a total cosmic dust input rate of 44 t d−1. ©2017. American Geophysical Union. All Rights Reserved. 资助项目: 291332
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62626
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, United Kingdom; National Centre for Atmospheric Science, University of Leeds, Leeds, United Kingdom; Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany; Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Gómez Martín J.C.,Brooke J.S.A.,Feng W.,et al. Impacts of meteoric sulfur in the Earth's atmosphere[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(14)