globalchange  > 气候变化事实与影响
DOI: 10.1002/2014GB005006
Scopus记录号: 2-s2.0-85027947963
论文题名:
Carbon dynamics of the Weddell Gyre, Southern Ocean
作者: Brown P; J; , Jullion L; , Landschützer P; , Bakker D; C; E; , Naveira Garabato A; C; , Meredith M; P; , Torres-Valdés S; , Watson A; J; , Hoppema M; , Loose B; , Jones E; M; , Telszewski M; , Jones S; D; , Wanninkhof R
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期:3
起始页码: 288
结束页码: 306
语种: 英语
英文关键词: air-sea exchange of CO2 ; neural network ; observations ; ocean carbon cycle ; Southern Ocean ; Weddell Gyre
Scopus关键词: air-sea interaction ; biogeochemical cycle ; biological pump ; carbon budget ; carbon sink ; deep water ; gyre ; in situ measurement ; Southern Ocean ; Weddell Sea
英文摘要: The accumulation of carbon within the Weddell Gyre and its exchanges across the gyre boundaries are investigated with three recent full-depth oceanographic sections enclosing this climatically important region. The combination of carbon measurements with ocean circulation transport estimates from a box inverse analysis reveals that deepwater transports associated with Warm Deep Water (WDW) and Weddell Sea Deep Water dominate the gyre's carbon budget, while a dual-cell vertical overturning circulation leads to both upwelling and the delivery of large quantities of carbon to the deep ocean. Historical sea surface pCO2 observations, interpolated using a neural network technique, confirm the net summertime sink of 0.044 to 0.058 ± 0.010 Pg C yr-1 derived from the inversion. However, a wintertime outgassing signal similar in size results in a statistically insignificant annual air-to-sea CO2 flux of 0.002 ± 0.007 Pg C yr-1 (mean 1998-2011) to 0.012 ± 0.024 Pg C yr-1 (mean 2008-2010) to be diagnosed for the Weddell Gyre. A surface layer carbon balance, independently derived from in situ biogeochemical measurements, reveals that freshwater inputs and biological drawdown decrease surface ocean inorganic carbon levels more than they are increased by WDW entrainment, resulting in an estimated annual carbon sink of 0.033 ± 0.021 Pg C yr-1. Although relatively less efficient for carbon uptake than the global oceans, the summertime Weddell Gyre suppresses the winter outgassing signal, while its biological pump and deepwater formation act as key conduits for transporting natural and anthropogenic carbon to the deep ocean where they can reside for long time scales. ©2015. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77995
Appears in Collections:气候变化事实与影响

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作者单位: Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; British Antarctic Survey, Cambridge, United Kingdom; National Oceanography Centre, Southampton, United Kingdom; National Oceanography Centre, University of Southampton, Southampton, United Kingdom; Mediterranean Institute of Oceanography, Aix-Marseille University, CNRS/INSU, IRD, MIO, UM 110, Marseille, France; Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Zürich, Switzerland; Scottish Association for Marine Science, Oban, United Kingdom; College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; Graduate School of Oceanography, University of Rhode Island, Narragansett, RI, United States; Royal Netherlands Institute for Sea Research (NIOZ), Texel, Netherlands; Centre for Energy and Environmental Sciences, Energy and Sustainability Research Institute Groningen, University of Groningen, Groningen, Netherlands; International Ocean Carbon Coordination Project, Institute of Oceanology of Polish Academy of Sciences, Sopot, Poland; Tyndall Centre for Climate Change Research, University of East Anglia, Norwich, United Kingdom; Ocean Chemistry Division, Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration, Miami, FL, United States

Recommended Citation:
Brown P,J,, Jullion L,et al. Carbon dynamics of the Weddell Gyre, Southern Ocean[J]. Global Biogeochemical Cycles,2015-01-01,29(3)
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