DOI: 10.1175/JCLI-D-17-0635.1
Scopus记录号: 2-s2.0-85049741428
论文题名: Mechanisms governing the development of the North Atlantic Warming Hole in the CESM-LE future climate simulations
作者: Gervais M. ; Shaman J. ; Kushnir Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 15 起始页码: 5927
结束页码: 5946
语种: 英语
英文关键词: Atmosphere-ocean interaction
; Climate prediction
; Deep convection
; Freshwater
; Meridional overturning circulation
; Ocean circulation
Scopus关键词: Atmospheric temperature
; Atmospheric thermodynamics
; Climate models
; Heat flux
; Natural convection
; Submarine geophysics
; Surface properties
; Surface waters
; Water
; Atmosphere-ocean interactions
; Climate prediction
; Deep convection
; Freshwater
; Meridional overturning circulations
; Ocean circulation
; Oceanography
; air-sea interaction
; climate modeling
; climate prediction
; freshwater
; future prospect
; heat flux
; meridional circulation
; overturn
; sea surface temperature
; Atlantic Ocean
; Labrador Sea
; North Atlantic Current
英文摘要: A warming deficit in North Atlantic sea surface temperatures is a striking feature in global climate model future projections. This North Atlantic warming hole has been related to a slowing of the Atlantic meridional overturning circulation (AMOC); however, the detailed mechanisms involved in its generation remain an open question. An analysis of the Community Earth System Model Large Ensemble simulations is conducted to obtain further insight into the development of the warming hole and its relationship to the AMOC. It is shown that increasing freshwater fluxes through the Arctic gates lead to surface freshening and reduced Labrador Sea deep convection, which in turn act to cool Labrador Sea sea surface temperatures. Furthermore, the resulting changes in surface ocean circulation lead to enhanced transport of cooled Labrador Sea surface waters into the interior of the subpolar gyre and a more zonal orientation of the North Atlantic Current. As a result, there is an increase in ocean advective heat flux divergence within the center of the subpolar gyre, causing this warming deficit in North Atlantic sea surface temperatures. These local changes to the ocean circulation affect the AMOC and lead to its slowdown. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111415
Appears in Collections: 气候减缓与适应
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作者单位: Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University Park, PA, United States; Lamont-Doherty Earth Observatory, Columbia University, New York, NY, United States; Department of Environmental Health Sciences, Columbia University, New York, NY, United States
Recommended Citation:
Gervais M.,Shaman J.,Kushnir Y.. Mechanisms governing the development of the North Atlantic Warming Hole in the CESM-LE future climate simulations[J]. Journal of Climate,2018-01-01,31(15)