DOI: 10.1029/2012JD018382
论文题名: Impacts of climate change, ozone recovery, and increasing methane on surface ozone and the tropospheric oxidizing capacity
作者: Morgenstern O. ; Zeng G. ; Abraham N.L. ; Telford P.J. ; Braesicke P. ; Pyle J.A. ; Hardiman S.C. ; O'connor F.M. ; Johnson C.E.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 2 起始页码: 1028
结束页码: 1041
语种: 英语
Scopus关键词: Atmospheric chemistry
; Atmospherics
; Global warming
; Methane
; Ozone layer
; Recovery
; Sea ice
; Troposphere
; Upper atmosphere
; Chemistry-climate models
; Northern Hemispheres
; Oxidizing capacity
; Ozone recovery
; Stratosphere-troposphere exchange
; Stratospheric ozone
; Tropospheric warming
; Zonal asymmetry
; Ozone
; atmospheric chemistry
; climate change
; global warming
; hydroxyl radical
; methane
; numerical model
; oxidation
; ozone
; troposphere
英文摘要: Using a stratosphere-troposphere chemistry-climate model, we compare the impacts of climate change, stratospheric ozone recovery, and methane increases on surface ozone and the tropospheric oxidizing capacity by 2050. Methane increases lead to a decreasing OH, particularly in the northern subtropics during summer. Stratospheric ozone recovery causes small increases of surface OH driven by increased stratosphere-troposphere exchange, occurring during parts of the year in the southern extratropics. Tropospheric warming is also associated with increasing OH, maximizing in the Northern Hemisphere in northern summer. In combination, OH is anticipated to decrease by approximately 8% in the tropospheric average by 2050 in the scenario considered here. In conjunction with these changes to OH, we model substantial changes in surface ozone in both hemispheres. Methane increases alone will lead to increasing surface ozone by up to 2-3 ppbv in the zonal mean, maximizing around 30N. This increase is exacerbated during austral winter when increased stratosphere-troposphere flux of ozone causes an increase in surface ozone in the southern extratropics. Both increases are partially offset by decreases in surface ozone of up to 2 ppbv in the zonal mean, with substantial zonal asymmetries, due to global warming. We model substantial changes in the methane lifetime caused by the three factors. In the Arctic during summer, disappearing sea ice, in an ice-albedo feedback, causes substantially reduced surface ozone. Of the three factors considered here, methane increases are found to exert the strongest influence on surface ozone. © 2012. American Geophysical Union. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64016
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: NIWA, Private Bag 50061, Omakau, 9352, New Zealand; Department of Chemistry, National Centre for Atmospheric Science - Climate, Cambridge University, United Kingdom; Hadley Centre, MetOffice, Exeter, United Kingdom
Recommended Citation:
Morgenstern O.,Zeng G.,Abraham N.L.,et al. Impacts of climate change, ozone recovery, and increasing methane on surface ozone and the tropospheric oxidizing capacity[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(2)