DOI: 10.1038/ngeo2259
论文题名: Atlantic origin of observed and modelled freshwater anomalies in the Nordic Seas
作者: Glessmer M.S. ; Eldevik T. ; Våge K. ; Øie Nilsen J.E. ; Behrens E.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期: 11 起始页码: 801
结束页码: 805
语种: 英语
Scopus关键词: hydrography
; inflow
; meridional circulation
; ocean basin
; runoff
; salinity
; sea ice
; Arctic Ocean
; Norwegian Sea
英文摘要: Between 1965 and 1990, the waters of the Nordic Seas and the subpolar basins of the North Atlantic Ocean freshened substantially1. The Arctic Ocean also became less saline over this time, as a consequence of increasing runoff1-4, but it is not clear whether flow from the Arctic Ocean was the main source of the Nordic Seas salinity anomaly. As a region of deep-water formation, the Nordic Seas are central to the Atlantic meridional overturning circulation, but this process is inhibited if the surface salinity is too low2. Here we use the instrumental record of Nordic Seas hydrography, along with a global ocean-sea-ice model hindcast simulation, to identify the sources and magnitude of freshwater that has accumulated in the Nordic Seas since 1950. We find that the freshwater anomalies within the Nordic Seas can mostly be explained by less salt entering the southern part of the basin with the relatively saline Atlantic inflow, with seemingly little contribution from the Arctic Ocean. We conclude that hydrographic changes in the Nordic Seas are primarily related to changes in the Atlantic Ocean. We infer that if the Atlantic inflow and Nordic Seas both freshen similarly, this would render the Atlantic meridional overturning circulation relatively insensitive to Nordic Seas freshwater content. © 2014 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106392
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: Geophysical Institute, Bjerknes Centre for Climate Research, University of Bergen, Bergen, Norway; Nansen Environmental and Remote Sensing Centre, Bjerknes Centre for Climate Research, Bergen, Norway; GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Hamburg University of Technology, Hamburg, Germany; National Institute OfWater and Atmospheric Research, Wellington, New Zealand
Recommended Citation:
Glessmer M.S.,Eldevik T.,Våge K.,et al. Atlantic origin of observed and modelled freshwater anomalies in the Nordic Seas[J]. Nature Geoscience,2014-01-01,7(11)