globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2543
论文题名:
Efficient removal of recalcitrant deep-ocean dissolved organic matter during hydrothermal circulation
作者: Hawkes J.A.; Rossel P.E.; Stubbins A.; Butterfield D.; Connelly D.P.; Achterberg E.P.; Koschinsky A.; Chavagnac V.; Hansen C.T.; Bach W.; Dittmar T.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期:11
起始页码: 856
结束页码: 860
语种: 英语
Scopus关键词: atmospheric gas ; carbon cycle ; carbon dioxide ; concentration (composition) ; deep sea ; dissolved organic matter ; effective stress ; efficiency measurement ; hydrothermal circulation ; magnesium ; mineralization ; removal experiment ; temperature effect ; Atlantic Ocean ; oceanic regions ; Pacific Ocean
英文摘要: Oceanic dissolved organic carbon (DOC) is an important carbon pool, similar in magnitude to atmospheric CO2, but the fate of its oldest forms is not well understood. Hot hydrothermal circulation may facilitate the degradation of otherwise un-reactive dissolved organic matter, playing an important role in the long-term global carbon cycle. The oldest, most recalcitrant forms of DOC, which make up most of oceanic DOC, can be recovered by solid-phase extraction. Here we present measurements of solid-phase extractable DOC from samples collected between 2009 and 2013 at seven vent sites in the Atlantic, Pacific and Southern oceans, along with magnesium concentrations, a conservative tracer of water circulation through hydrothermal systems. We find that magnesium and solid-phase extractable DOC concentrations are correlated, suggesting that solid-phase extractable DOC is almost entirely lost from solution through mineralization or deposition during circulation through hydrothermal vents with fluid temperatures of 212-401°C. In laboratory experiments, where we heated samples to 380°C for four days, we found a similar removal efficiency. We conclude that thermal degradation alone can account for the loss of solid-phase extractable DOC in natural hydrothermal systems, and that its maximum lifetime is constrained by the timescale of hydrothermal cycling, at about 40 million years. © 2015 Macmillan Publishers Limited.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106142
Appears in Collections:气候减缓与适应
科学计划与规划

Files in This Item:

There are no files associated with this item.


作者单位: Research Group for Marine Geochemistry (ICBM-MPI Bridging Group), Carl von Ossietzky University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany; HGF-MPG Group for Deep Sea Ecology and Technology, Alfred Wegener Institute, Bremerhaven, Germany; Skidaway Institute of Oceanography, Marine Sciences, University of Georgia, Savannah, GA, United States; Joint Institute for the Study of the Atmosphere and Oceans, University of Washington, NOAA/PMEL, Seattle, WA, United States; National Oceanography Centre, University of Southampton, Waterfront Campus, Southampton, United Kingdom; GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany; Jacobs University, Bremen, Germany; Laboratoire Géosciences Environnement Toulouse, Université de Toulouse, Toulouse, France; MARUMCenter for Marine Environmental Sciences, Department of Geosciences, University of Bremen, Bremen, Germany; Analytical Chemistry, Department of Chemistry-BMC, Uppsala University, Husargatan 3, Uppsala, Sweden

Recommended Citation:
Hawkes J.A.,Rossel P.E.,Stubbins A.,et al. Efficient removal of recalcitrant deep-ocean dissolved organic matter during hydrothermal circulation[J]. Nature Geoscience,2015-01-01,8(11)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Hawkes J.A.]'s Articles
[Rossel P.E.]'s Articles
[Stubbins A.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Hawkes J.A.]'s Articles
[Rossel P.E.]'s Articles
[Stubbins A.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Hawkes J.A.]‘s Articles
[Rossel P.E.]‘s Articles
[Stubbins A.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.