DOI: 10.1038/ngeo1687
论文题名: Atmospheric iodine levels influenced by sea surface emissions of inorganic iodine
作者: Carpenter L.J. ; MacDonald S.M. ; Shaw M.D. ; Kumar R. ; Saunders R.W. ; Parthipan R. ; Wilson J. ; Plane J.M.C.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 2 起始页码: 108
结束页码: 111
语种: 英语
Scopus关键词: air-sea interaction
; atmospheric chemistry
; boundary layer
; gas exchange
; iodine
; one-dimensional modeling
; organohalogen
; oxide
; ozone
; sea surface
; tropical region
; troposphere
; Atlantic Ocean
; Atlantic Ocean (Tropical)
英文摘要: Naturally occurring bromine- and iodine-containing compounds substantially reduce regional, and possibly even global, tropospheric ozone levels. As such, these halogen gases reduce the global warming effects of ozone in the troposphere, and its capacity to initiate the chemical removal of hydrocarbons such as methane. The majority of halogen-related surface ozone destruction is attributable to iodine chemistry. So far, organic iodine compounds have been assumed to serve as the main source of oceanic iodine emissions. However, known organic sources of atmospheric iodine cannot account for gas-phase iodine oxide concentrations in the lower troposphere over the tropical oceans. Here, we quantify gaseous emissions of inorganic iodine following the reaction of iodide with ozone in a series of laboratory experiments. We show that the reaction of iodide with ozone leads to the formation of both molecular iodine and hypoiodous acid. Using a kinetic box model of the sea surface layer and a one-dimensional model of the marine boundary layer, we show that the reaction of ozone with iodide on the sea surface could account for around 75% of observed iodine oxide levels over the tropical Atlantic Ocean. According to the sea surface model, hypoiodous acid - not previously considered as an oceanic source of iodine - is emitted at a rate ten-fold higher than that of molecular iodine under ambient conditions. © 2013 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106861
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Department of Chemistry, University of York, Heslington, York YO10 5DD, United Kingdom; School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom; Department of Mathematics, University of York, Heslington, York YO10 5DD, United Kingdom
Recommended Citation:
Carpenter L.J.,MacDonald S.M.,Shaw M.D.,et al. Atmospheric iodine levels influenced by sea surface emissions of inorganic iodine[J]. Nature Geoscience,2013-01-01,6(2)