globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2285
论文题名:
Carbonate counter pump stimulated by natural iron fertilization in the Polar Frontal Zone
作者: Salter I.; Schiebel R.; Ziveri P.; Movellan A.; Lampitt R.; Wolff G.A.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期:12
起始页码: 885
结束页码: 889
语种: 英语
Scopus关键词: biological production ; biological pump ; carbon dioxide ; carbonate ; deep sea ; frontier region ; iron ; polar front ; road ; sediment trap ; Southern Ocean
英文摘要: The production of organic carbon in the ocean's surface and its subsequent downward export transfers carbon dioxide to the deep ocean. This CO2 drawdown is countered by the biological precipitation of carbonate, followed by sinking of particulate inorganic carbon, which is a source of carbon dioxide to the surface ocean, and hence the atmosphere over 100-1,000 year timescales. The net transfer of CO2 to the deep ocean is therefore dependent on the relative amount of organic and inorganic carbon in sinking particles. In the Southern Ocean, iron fertilization has been shown to increase the export of organic carbon, but it is unclear to what degree this effect is compensated by the export of inorganic carbon. Here we assess the composition of sinking particles collected from sediment traps located in the Polar Frontal Zone of the Southern Ocean. We find that in high-nutrient, low-chlorophyll regions that are characterized by naturally high iron concentrations, fluxes of both organic and inorganic carbon are higher than in regions with no iron fertilization. However, the excess flux of inorganic carbon is greater than that of organic carbon. We estimate that the production and flux of carbonate in naturally iron-fertilized waters reduces the overall amount of CO2 transferred to the deep ocean by 6-32%, compared to 1-4% at the non-fertilized site. We suggest that an increased export of organic carbon, stimulated by iron availability in the glacial sub-Antarctic oceans, may have been accompanied by a strengthened carbonate counter pump. © 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/106482
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: Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, Bremerhaven, Germany; Sorbonne Universités, UPMC Univ Paris 06, Laboratoire d'Océanographie Microbienne, Observatoire Océanologigique, Banyuls/mer, France; Université d'Angers, UMR CNRS 6112, LPG-BIAF-Bio-Indicateurs Actuels et Fossiles, 2 Boulevard Lavoisier, Angers, France; Universitat Autònoma de Barcelona, ICREA-ICTA, Edifici Z, Carrer de les columnes, Bellaterra, Barcelona, Spain; Vrije Universiteit Amsterdam, Department of Earth Sciences, FALW, De Boelelaan 1105, Amsterdam, Netherlands; National Oceanography Centre, Ocean Biogeochemistry and Ecosystems, Waterfront Campus, European Way, Southampton, United Kingdom; University of Liverpool, School of Environmental Sciences, 4 Brownlow Street, Liverpool, United Kingdom

Recommended Citation:
Salter I.,Schiebel R.,Ziveri P.,et al. Carbonate counter pump stimulated by natural iron fertilization in the Polar Frontal Zone[J]. Nature Geoscience,2014-01-01,7(12)
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