globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2731
论文题名:
Southern Ocean warming delayed by circumpolar upwelling and equatorward transport
作者: Armour K.C.; Marshall J.; Scott J.R.; Donohoe A.; Newsom E.R.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期:7
起始页码: 549
结束页码: 554
语种: 英语
Scopus关键词: advection ; circumpolar current ; climate change ; greenhouse gas ; heat flow ; meridional circulation ; oceanic general circulation model ; overturn ; temperature anomaly ; upper ocean ; upwelling ; warming ; wind-driven circulation ; Antarctic Circumpolar Current ; Arctic ; Southern Ocean
英文摘要: The Southern Ocean has shown little warming over recent decades, in stark contrast to the rapid warming observed in the Arctic. Along the northern flank of the Antarctic Circumpolar Current, however, the upper ocean has warmed substantially. Here we present analyses of oceanographic observations and general circulation model simulations showing that these patterns-of delayed warming south of the Antarctic Circumpolar Current and enhanced warming to the north-are fundamentally shaped by the Southern Ocean's meridional overturning circulation: wind-driven upwelling of unmodified water from depth damps warming around Antarctica; greenhouse gas-induced surface heat uptake is largely balanced by anomalous northward heat transport associated with the equatorward flow of surface waters; and heat is preferentially stored where surface waters are subducted to the north. Further, these processes are primarily due to passive advection of the anomalous warming signal by climatological ocean currents; changes in ocean circulation are secondary. These findings suggest the Southern Ocean responds to greenhouse gas forcing on the centennial, or longer, timescale over which the deep ocean waters that are upwelled to the surface are warmed themselves. It is against this background of gradual warming that multidecadal Southern Ocean temperature trends must be understood. © 2016 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/105982
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: School of Oceanography, Department of Atmospheric Sciences, University OfWashington, Seattle, WA, United States; Department of Earth Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Center for Global Change Science, Massachusetts Institute of Technology, Cambridge, MA, United States; Polar Science Center, Applied Physics Laboratory, University of Washington, Seattle, WA, United States; Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States

Recommended Citation:
Armour K.C.,Marshall J.,Scott J.R.,et al. Southern Ocean warming delayed by circumpolar upwelling and equatorward transport[J]. Nature Geoscience,2016-01-01,9(7)
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