DOI: 10.1038/ngeo2363
论文题名: Efficiency of short-lived halogens at influencing climate through depletion of stratospheric ozone
作者: Hossaini R. ; Chipperfield M.P. ; Montzka S.A. ; Rap A. ; Dhomse S. ; Feng W.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期: 3 起始页码: 186
结束页码: 190
语种: 英语
Scopus关键词: anthropogenic effect
; atmospheric pollution
; CFC
; future prospect
; greenhouse gas
; Montreal Protocol
; ozone
; phytoplankton
; radiative transfer
; seaweed
; stratosphere
英文摘要: Halogens released from long-lived anthropogenic substances, such as chlorofluorocarbons, are the principal cause of recent depletion of stratospheric ozone, a greenhouse gas. Recent observations show that very short-lived substances, with lifetimes generally under six months, are also an important source of stratospheric halogens. Short-lived bromine substances are produced naturally by seaweed and phytoplankton, whereas short-lived chlorine substances are primarily anthropogenic. Here we used a chemical transport model to quantify the depletion of ozone in the lower stratosphere from short-lived halogen substances, and a radiative transfer model to quantify the radiative effects of that ozone depletion. According to our simulations, ozone loss from short-lived substances had a radiative effect nearly half that from long-lived halocarbons in 2011 and, since pre-industrial times, has contributed a total of about -0.02 W m -2 to global radiative forcing. We find natural short-lived bromine substances exert a 3.6 times larger ozone radiative effect than long-lived halocarbons, normalized by halogen content, and show atmospheric levels of dichloromethane, a short-lived chlorine substance not controlled by the Montreal Protocol, are rapidly increasing. We conclude that potential further significant increases in the atmospheric abundance of short-lived halogen substances, through changing natural processes or continued anthropogenic emissions, could be important for future climate. © 2015 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106375
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: School of Earth and Environment, University of Leeds, Leeds, United Kingdom; National Oceanic and Atmospheric Administration, Boulder, CO, United States; National Centre for Atmospheric Science, University of Leeds, Leeds, United Kingdom
Recommended Citation:
Hossaini R.,Chipperfield M.P.,Montzka S.A.,et al. Efficiency of short-lived halogens at influencing climate through depletion of stratospheric ozone[J]. Nature Geoscience,2015-01-01,8(3)