DOI: 10.1038/ngeo2708
论文题名: Oceanic transport of surface meltwater from the southern Greenland ice sheet
作者: Luo H. ; Castelao R.M. ; Rennermalm A.K. ; Tedesco M. ; Bracco A. ; Yager P.L. ; Mote T.L.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期: 7 起始页码: 528
结束页码: 532
语种: 英语
Scopus关键词: bioavailability
; fjord
; mass transfer
; meltwater
; meridional circulation
; oceanic convection
; oceanic general circulation model
; runoff
; salinity
; stratification
; water flow
; Arctic
; Atlantic Ocean
; Atlantic Ocean
; Greenland
; Greenland Ice Sheet
; Labrador Sea
英文摘要: The Greenland ice sheet has undergone accelerating mass losses during recent decades. Freshwater runoff from ice melt can influence fjord circulation and dynamics and the delivery of bioavailable micronutrients to the ocean. It can also have climate implications, because stratification in the adjacent Labrador Sea may influence deep convection and the strength of the Atlantic meridional overturning circulation. Yet, the fate of the meltwater in the ocean remains unclear. Here, we use a high-resolution ocean model to show that only 1-15% of the surface meltwater runoff originating from southwest Greenland is transported westwards. In contrast, up to 50-60% of the meltwater runoff originating from southeast Greenland is transported westwards into the northern Labrador Sea, leading to significant salinity and stratification anomalies far from the coast. Doubling meltwater runoff, as predicted in future climate scenarios, results in a more-than-double increase in anomalies offshore that persists further into the winter. Interannual variability in offshore export of meltwater is tightly related to variability in wind forcing. The new insight that meltwaters originating from the west and east coasts have different fates indicates that future changes in mass loss rates and surface runoff will probably impact the ocean differently, depending on their Greenland origins. © 2016 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105981
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Department of Marine Sciences, University of Georgia, Athens, GA, United States; Department of Geography, Rutgers University, Piscataway, NJ, United States; Lamont Doherty Earth Observatory, Columbia University, Palisades, NY, United States; NASA, Goddard Institute for Space Studies, New York, NY, United States; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; Department of Geography, University of Georgia, Athens, GA, United States
Recommended Citation:
Luo H.,Castelao R.M.,Rennermalm A.K.,et al. Oceanic transport of surface meltwater from the southern Greenland ice sheet[J]. Nature Geoscience,2016-01-01,9(7)