DOI: 10.1175/JCLI-D-12-00504.1
Scopus记录号: 2-s2.0-84884256106
论文题名: Southern Ocean Circulation and Eddy Compensation in CMIP5 Models
作者: Downes S.M. ; Hogg A.M.C.C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 18 起始页码: 7198
结束页码: 7220
语种: 英语
Scopus关键词: Antarctic circumpolar current
; Atmospheric CO
; Coupled Model Intercomparison Project
; Global distribution
; Heat and freshwater fluxes
; Meridional overturning circulations
; Surface transport
; Surface wind stress
; Carbon dioxide
; Climate change
; Ocean currents
; Wind stress
; Climate models
; atmosphere-ocean coupling
; atmospheric modeling
; climate change
; climate modeling
; eddy
; meridional circulation
; oceanic circulation
; surface wind
; twenty first century
; wind stress
; Southern Ocean
英文摘要: Thirteen state-of-the-art climate models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) are used to evaluate the response of the Antarctic Circumpolar Current (ACC) transport and Southern Ocean meridional overturning circulation to surface wind stress and buoyancy changes. Understanding how these flows-fundamental players in the global distribution of heat, gases, and nutrients- respond to climate change is currently a widely debated issue among oceanographers. Here, the authors analyze the circulation responses of these coarse-resolution coupled models to surface fluxes. Under a future CMIP5 climate pathway where the equivalent atmospheric CO2 reaches 1370 ppm by 2100, the models robustly project reduced Southern Ocean density in the upper 2000m accompanied by strengthened stratification. Despite an overall increase in overlying wind stress (~20%), the projected ACC transports lie within 615% of their historical state, and no significant relationship with changes in the magnitude or position of the wind stress is identified. The models indicate that a weakening of ACC transport at the end of the twenty-first century is correlated with a strong increase in the surface heat and freshwater fluxes in the ACC region. In contrast, the surface heat gain across the ACC region and the wind-driven surface transports are significantly correlated with an increased upper and decreased lower Eulerian-mean meridional overturning circulation. The change in the eddy-induced overturning in both the depth and density spaces is quantified, and it is found that the CMIP5 models project partial eddy compensation of the upper and lower overturning cells. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51682
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Research School of Earth Sciences, and ARC Centre of Excellence for Climate System Science, The Australian National University, Acton, Australian Capital Territory, Australia
Recommended Citation:
Downes S.M.,Hogg A.M.C.C.. Southern Ocean Circulation and Eddy Compensation in CMIP5 Models[J]. Journal of Climate,2013-01-01,26(18)