DOI: 10.1175/JCLI-D-16-0474.1
Scopus记录号: 2-s2.0-85015856267
论文题名: Transient response of the Southern Ocean to changing ozone: Regional responses and physical mechanisms
作者: Seviour W.J.M. ; Gnanadesikan A. ; Waugh D. ; Pradal M.-A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 7 起始页码: 2463
结束页码: 2480
语种: 英语
Scopus关键词: Atmospheric thermodynamics
; Climate models
; Fighter aircraft
; Mixing
; Ozone
; Sea ice
; Water absorption
; Annular mode
; Atmosphere-ocean interactions
; Coupled models
; Ocean circulation
; Stratosphere-troposphere coupling
; Oceanography
; air-sea interaction
; atmosphere-ocean coupling
; climate modeling
; oceanic circulation
; ozone
; stratosphere-troposphere interaction
; Pacific Ocean
; Southern Ocean
英文摘要: The impact of changing ozone on the climate of the Southern Ocean is evaluated using an ensemble of coupled climate model simulations. By imposing a step change from 1860 to 2000 conditions, response functions associated with this change are estimated. The physical processes that drive this response are different across time periods and locations, as is the sign of the response itself. Initial cooling in the Pacific sector is driven not only by the increased winds pushing cold water northward, but also by the southward shift of storms associated with the jet stream. This shift drives both an increase in cloudiness (resulting in less absorption of solar radiation) and an increase in net freshwater flux to the ocean (resulting in a decrease in surface salinity that cuts off mixing of warm water from below). A subsurface increase in temperature associated with this reduction in mixing then upwells along the Antarctic coast, producing a subsequent warming. Similar changes in convective activity occur in the Weddell Sea but are offset in time. Changes in sea ice concentration also play a role in modulating solar heating of the ocean near the continent. The time scale for the initial cooling is much longer than that seen in NCAR CCSM3.5, possibly reflecting differences in natural convective variability between that model (which has essentially no Southern Ocean deep convection) and the one used here (which has a large and possibly unrealistically regular mode of convection) or to differences in cloud feedbacks or in the location of the anomalous winds. © 2017 American Meteorological Society. 资助项目: NOAA, National Oceanic and Atmospheric Administration
; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49739
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD, United States
Recommended Citation:
Seviour W.J.M.,Gnanadesikan A.,Waugh D.,et al. Transient response of the Southern Ocean to changing ozone: Regional responses and physical mechanisms[J]. Journal of Climate,2017-01-01,30(7)