DOI: 10.1002/2014GL062140
论文题名: Direct and ozone-mediated forcing of the Southern Annular Mode by greenhouse gases
作者: Morgenstern O. ; Zeng G. ; Dean S.M. ; Joshi M. ; Abraham N.L. ; Osprey A.
刊名: Geophysical Research Letters
ISSN: 0094-9436
EISSN: 1944-9167
出版年: 2014
卷: 41, 期: 24 起始页码: 9050
结束页码: 9057
语种: 英语
英文关键词: climate change
; greenhouse gas
; ozone
; regression
; southern annular mode
; Southern Hemisphere
Scopus关键词: Atmospheric chemistry
; Climate change
; Gases
; Greenhouse effect
; Greenhouse gases
; Ozone
; Ozone layer
; Climate simulation
; Ocean chemistry
; Radiative effects
; regression
; Southern Annular Mode
; Southern Hemisphere
; Stratospheric ozone depletion
; Surface pressures
; Climate models
; atmosphere-ocean coupling
; climate feedback
; climate forcing
; climate modeling
; greenhouse gas
; ozone depletion
; stratosphere
英文摘要: We assess the roles of long-lived greenhouse gases and ozone depletion in driving meridional surface pressure gradients in the southern extratropics; these gradients are a defining feature of the Southern Annular Mode. Stratospheric ozone depletion is thought to have caused a strengthening of this mode during summer, with increasing long-lived greenhouse gases playing a secondary role. Using a coupled atmosphere-ocean chemistry-climate model, we show that there is cancelation between the direct, radiative effect of increasing greenhouse gases by the also substantial indirect - chemical and dynamical - feedbacks that greenhouse gases have via their impact on ozone. This sensitivity of the mode to greenhouse gas-induced ozone changes suggests that a consistent implementation of ozone changes due to long-lived greenhouse gases in climate models benefits the simulation of this important aspect of Southern Hemisphere climate. Key Points The ozone-mediated impact of GHGs on the summer SAM offsets the direct effectIn climate simulations prescribed ozone needs to be consistent with GHG forcing ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921811906&doi=10.1002%2f2014GL062140&partnerID=40&md5=1a0575c9be34eba6e178d024edcb4983
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6700
Appears in Collections: 气候减缓与适应
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作者单位: National Institute of Water and Atmospheric Research, Lauder, New Zealand
Recommended Citation:
Morgenstern O.,Zeng G.,Dean S.M.,et al. Direct and ozone-mediated forcing of the Southern Annular Mode by greenhouse gases[J]. Geophysical Research Letters,2014-01-01,41(24).