DOI: 10.1175/JCLI-D-18-0170.1
Scopus记录号: 2-s2.0-85052913990
论文题名: Evolving relative importance of the Southern Ocean and North Atlantic in anthropogenic ocean heat uptake
作者: Shi J.-R. ; Xie S.-P. ; Talley L.D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 18 起始页码: 7459
结束页码: 7479
语种: 英语
英文关键词: Air-sea interaction
; Anthropogenic effects
; Climate change
; Climate models
; Heat budgets/fluxes
Scopus关键词: Aerosols
; Atmospheric radiation
; Catchments
; Climate change
; Climate models
; Geographical distribution
; Greenhouse effect
; Greenhouse gases
; Heat flux
; Air sea interactions
; Anthropogenic aerosols
; Anthropogenic effects
; Atlantic meridional overturning circulations
; Coupled Model Intercomparison Project
; Heat budgets/fluxes
; Relative contribution
; Subpolar North Atlantic
; Oceanography
英文摘要: Ocean uptake of anthropogenic heat over the past 15 years has mostly occurred in the Southern Ocean, based on Argo float observations. This agrees with historical simulations from phase 5 of the Coupled Model Intercomparison Project (CMIP5), where the Southern Ocean (south of 30°S) accounts for 72% ± 28% of global heat uptake, while the contribution from the North Atlantic north of 30°N is only 6%. Aerosols preferentially cool the Northern Hemisphere, and the effect on surface heat flux over the subpolar North Atlantic opposes the greenhouse gas (GHG) effect in nearly equal magnitude. This heat uptake compensation is associated with weakening (strengthening) of the Atlantic meridional overturning circulation (AMOC) in response to GHG (aerosol) radiative forcing. Aerosols are projected to decline in the near future, reinforcing the greenhouse effect on the North Atlantic heat uptake. As a result, the Southern Ocean, which will continue to take up anthropogenic heat largely through the mean upwelling of water from depth, will be joined by increased relative contribution from the North Atlantic because of substantial AMOC slowdown in the twenty-first century. In the RCP8.5 scenario, the percentage contribution to global uptake is projected to decrease to 48% ± 8% in the Southern Ocean and increase to 26% ± 6% in the northern North Atlantic. Despite the large uncertainty in the magnitude of projected aerosol forcing, our results suggest that anthropogenic aerosols, given their geographic distributions and temporal trajectories, strongly influence the high-latitude ocean heat uptake and interhemispheric asymmetry through AMOC change. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110688
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, United States
Recommended Citation:
Shi J.-R.,Xie S.-P.,Talley L.D.. Evolving relative importance of the Southern Ocean and North Atlantic in anthropogenic ocean heat uptake[J]. Journal of Climate,2018-01-01,31(18)