DOI: 10.1002/2017JD027562
Scopus记录号: 2-s2.0-85042351114
论文题名: Effects of Greenhouse Gas Increase and Stratospheric Ozone Depletion on Stratospheric Mean Age of Air in 1960–2010
作者: Li F. ; Newman P. ; Pawson S. ; Perlwitz J.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 4 起始页码: 2098
结束页码: 2110
语种: 英语
英文关键词: Brewer-Dobson circulation
; greenhouse gas increases
; mean age difference
; mean age of air
; stratospheric ozone depletion
英文摘要: The relative impacts of greenhouse gas (GHG) increase and stratospheric ozone depletion on stratospheric mean age of air in the 1960–2010 period are quantified using the Goddard Earth Observing System Chemistry-Climate Model. The experiment compares controlled simulations using a coupled atmosphere-ocean version of the Goddard Earth Observing System Chemistry-Climate Model, in which either GHGs or ozone depleting substances, or both factors evolve over time. The model results show that GHGs and ozone depleting substances have about equal contributions to the simulated mean age decrease, but GHG increases account for about two thirds of the enhanced strength of the lower stratospheric residual circulation. It is also found that both the acceleration of the diabatic circulation and the decrease of the mean age difference between downwelling and upwelling regions are mainly caused by GHG forcing. The results show that ozone depletion causes an increase in the mean age of air in the Antarctic summer lower stratosphere through two processes: (1) a seasonal delay in the Antarctic polar vortex breakup that inhibits young midlatitude air from mixing with the older air inside the vortex, and (2) enhanced Antarctic downwelling that brings older air from middle and upper stratosphere into the lower stratosphere. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114438
Appears in Collections: 气候减缓与适应
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作者单位: Universities Space Research Association, Columbia, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; Physical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO, United States
Recommended Citation:
Li F.,Newman P.,Pawson S.,et al. Effects of Greenhouse Gas Increase and Stratospheric Ozone Depletion on Stratospheric Mean Age of Air in 1960–2010[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(4)