globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2200
论文题名:
Eddy-induced variability in Southern Ocean abyssal mixing on climatic timescales
作者: Sheen K.L.; Garabato A.C.N.; Brearley J.A.; Meredith M.P.; Polzin K.L.; Smeed D.A.; Forryan A.; King B.A.; Sallée J.-B.; St. Laurent L.; Thurnherr A.M.; Toole J.M.; Waterman S.N.; Watson A.J.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期:8
起始页码: 577
结束页码: 582
语种: 英语
英文摘要: The Southern Ocean plays a pivotal role in the global ocean circulation and climate. There, the deep water masses of the world ocean upwell to the surface and subsequently sink to intermediate and abyssal depths, forming two overturning cells that exchange substantial quantities of heat and carbon with the atmosphere. The sensitivity of the upper cell to climatic changes in forcing is relatively well established. However, little is known about how the lower cell responds, and in particular whether small-scale mixing in the abyssal Southern Ocean, an important controlling process of the lower cell, is influenced by atmospheric forcing. Here, we present observational evidence that relates changes in abyssal mixing to oceanic eddy variability on timescales of months to decades. Observational estimates of mixing rates, obtained along a repeat hydrographic transect across Drake Passage, are shown to be dependent on local oceanic eddy energy, derived from moored current meter and altimetric measurements. As the intensity of the regional eddy field is regulated by the Southern Hemisphere westerly winds, our findings suggest that Southern Ocean abyssal mixing and overturning are sensitive to climatic perturbations in wind forcing. © 2014 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106605
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: University of Southampton, National Oceanography Centre, Southampton SO14 3ZH, United Kingdom; British Antarctic Survey, Cambridge CB3 0ET, United Kingdom; Scottish Association for Marine Science, Oban PA37 1QA, United Kingdom; Woods Hole Oceanographic Institution, 266 Woods Hole Road, Woods Hole, MA 02543-1050, United States; National Oceanography Centre, Southampton SO14 3ZH, United Kingdom; Laboratoire d'Océanographie et du Climat, 75252 Paris, France; Lamont-Doherty Earth Observatory, Palisades, NY 10964, United States; Climate Change Research Centre, ARC Centre of Excellence for Climate System Science, University of New South Wales, Sydney, NSW 2052, Australia; University of British Columbia, Vancouver, BC V6T 1Z4, Canada; University of Exeter, Exeter EX4 4SB, United Kingdom

Recommended Citation:
Sheen K.L.,Garabato A.C.N.,Brearley J.A.,et al. Eddy-induced variability in Southern Ocean abyssal mixing on climatic timescales[J]. Nature Geoscience,2014-01-01,7(8)
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