DOI: 10.1002/2016GB005478
Scopus记录号: 2-s2.0-85013627225
论文题名: The biogeochemistry of cobalt in the Mediterranean Sea
作者: Dulaquais G ; , Planquette H ; , L'Helguen S ; , Rijkenberg M ; J ; A ; , Boye M
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2017
卷: 31, 期: 2 起始页码: 377
结束页码: 399
语种: 英语
英文关键词: biogeochemistry
; cobalt
; GEOTRACES
; Mediterranean Sea
; size fractionation
Scopus关键词: biogeochemical cycle
; biogeochemistry
; cobalt
; concentration (composition)
; deep sea
; fractionation
; remineralization
; research program
; surface water
; Mediterranean Sea
; Strait of Gibraltar
英文摘要: The soluble (sCo < 0.02 µm), dissolved (DCo < 0.2 µm), colloidal (cCo, as DCo minus sCo), and the particulate (pCo > 0.2 µm) fractions of cobalt were investigated along the GEOTRACES-A04 section. Our results show that sCo was the predominant form (90%) of the DCo in the Mediterranean Sea and that cCo and pCo generally followed the same distribution, suggesting a biogeochemical link between these two fractions. In the Mediterranean Sea, DCo displayed an overall scavenged-like profile in the different sub-basins, with high concentrations (up to 350 pM) in surface and quasi-uniformed low concentrations of DCo (~45 pM) in the deep sea. However, the decoupling between the surface and the deep reservoirs suggested that the transfer of Co from dissolved to particulate pools during the sink of particles may not be the only process governing DCo distribution. High-surface Co inputs, stabilization of DCo in a soluble form, and the extremely high regeneration rate of biogenic pCo all lead to the accumulation of DCo in surface. Conversely, low pCo export from the surface waters, low remineralization of biogenic pCo, and slow but efficient removal of DCo by scavenging including colloid aggregation into particles prevented its accumulation in the intermediate and deep sea. Moreover, Mediterranean circulation prevented the exchanges between the DCo-rich surface and the DCo-poor deep layers enhancing the scavenged-like profile of DCo. Finally, tentative DCo budgets were balanced at basin scale and showed the strong imprint of the surface inputs at Gibraltar Strait on the Mediterranean cobalt biogeochemistry. ©2017. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77764
Appears in Collections: 气候变化事实与影响
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作者单位: Laboratoire des Sciences de l'Environnement Marin CNRS UMR 6539, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, Plouzané, France; NIOZ Royal Netherlands Institute for Sea Research, Department of Ocean Systems, Utrecht University, Den Burg, Netherlands
Recommended Citation:
Dulaquais G,, Planquette H,, L'Helguen S,et al. The biogeochemistry of cobalt in the Mediterranean Sea[J]. Global Biogeochemical Cycles,2017-01-01,31(2)