DOI: 10.1038/ngeo2740
论文题名: Emerging impact of Greenland meltwater on deepwater formation in the North Atlantic Ocean
作者: Böning C.W. ; Behrens E. ; Biastoch A. ; Getzlaff K. ; Bamber J.L.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期: 7 起始页码: 523
结束页码: 527
语种: 英语
Scopus关键词: Atlantic Multidecadal Oscillation
; deep water formation
; eddy
; freshwater input
; global ocean
; meltwater
; meridional circulation
; oceanic convection
; reconstruction
; water budget
; Arctic
; Atlantic Ocean
; Atlantic Ocean (North)
; Greenland
; Greenland Ice Sheet
; Labrador Sea
; West Greenland
英文摘要: The Greenland ice sheet has experienced increasing mass loss since the 1990s. The enhanced freshwater flux due to both surface melt and outlet glacier discharge is assuming an increasingly important role in the changing freshwater budget of the subarctic Atlantic. The sustained and increasing freshwater fluxes from Greenland to the surface ocean could lead to a suppression of deep winter convection in the Labrador Sea, with potential ramifications for the strength of the Atlantic meridional overturning circulation. Here we assess the impact of the increases in the freshwater fluxes, reconstructed with full spatial resolution, using a global ocean circulation model with a grid spacing fine enough to capture the small-scale, eddying transport processes in the subpolar North Atlantic. Our simulations suggest that the invasion of meltwater from the West Greenland shelf has initiated a gradual freshening trend at the surface of the Labrador Sea. Although the freshening is still smaller than the variability associated with the episodic â great salinity anomalies', the accumulation of meltwater may become large enough to progressively dampen the deep winter convection in the coming years. We conclude that the freshwater anomaly has not yet had a significant impact on the Atlantic meridional overturning circulation. © 2016 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105972
Appears in Collections: 气候减缓与适应 科学计划与规划
There are no files associated with this item.
作者单位: GEOMAR, Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, Kiel, Germany; National Institute ForWater and Atmospheric Research, 301 Evans Parade, Hataitai, Wellington, New Zealand; School of Geographical Sciences, University of Bristol, Bristol, United Kingdom
Recommended Citation:
Böning C.W.,Behrens E.,Biastoch A.,et al. Emerging impact of Greenland meltwater on deepwater formation in the North Atlantic Ocean[J]. Nature Geoscience,2016-01-01,9(7)