DOI: 10.1002/2013GB004637
Scopus记录号: 2-s2.0-84892959807
论文题名: Biogeochemical cycling of dissolved zinc along the GEOTRACES South Atlantic transect GA10 at 40°S
作者: Wyatt N ; J ; , Milne A ; , Woodward E ; M ; S ; , Rees A ; P ; , Browning T ; J ; , Bouman H ; A ; , Worsfold P ; J ; , Lohan M ; C
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 1 起始页码: 44
结束页码: 56
语种: 英语
英文关键词: Biogeochemistry
; Chemical oceanography
; GEOTRACES
; South Atlantic
; Zinc
Scopus关键词: Biogeochemistry
; Dissolution
; Ecology
; Oceanography
; Phytoplankton
; Silicon
; Biogeochemical cycle
; Biogeochemical cycling
; Chemical oceanography
; GEOTRACES
; Linear relationships
; Phytoplankton growth
; Reactive phosphorus
; South Atlantic
; Zinc
; biogeochemical cycle
; dissolved matter
; growth rate
; nutrient cycling
; phytoplankton
; zinc
; Atlantic Ocean
; Atlantic Ocean (South)
英文摘要: The biogeochemical cycle of zinc (Zn) in the South Atlantic, at 40°S, was investigated as part of the UK GEOTRACES program. To date there is little understanding of the supply of Zn, an essential requirement for phytoplankton growth, to this highly productive region. Vertical Zn profiles displayed nutrient-like distributions with distinct gradients associated with the water masses present. Surface Zn concentrations are among the lowest reported for the world's oceans (< 50 pM). A strong Zn-Si linear relationship was observed (Zn (nM) = 0.065 Si (μM), r2 = 0.97, n = 460). Our results suggest that the use of a global Zn-Si relationship would lead to an underestimation of dissolved Zn in deeper waters of the South Atlantic. By utilizing Si* and a new tracer Zn* our data indicate that the preferential removal of Zn in the Southern Ocean prevented a direct return path for dissolved Zn to the surface waters of the South Atlantic at 40°S and potentially the thermocline waters of the South Atlantic subtropical gyre. The importance of Zn for phytoplankton growth was evaluated using the Zn-soluble reactive phosphorus (SRP) relationship. We hypothesize that the low Zn concentrations in the South Atlantic may select for phytoplankton cells with a lower Zn requirement. In addition, a much deeper kink at ~ 500m in the Zn:SRP ratio was observed compared to other oceanic regions. Key Points Dissolved zinc biogeochemical cycle investigated in the South Atlantic Ocean ©2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77500
Appears in Collections: 气候变化事实与影响
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作者单位: Marine Institute, University of Plymouth, Plymouth, United Kingdom; School of Geography, Earth, and Environmental Sciences, University of Plymouth, Plymouth, United Kingdom; Plymouth Marine Laboratory, Plymouth, United Kingdom; Department of Earth Sciences, University of Oxford, Oxford, United Kingdom
Recommended Citation:
Wyatt N,J,, Milne A,et al. Biogeochemical cycling of dissolved zinc along the GEOTRACES South Atlantic transect GA10 at 40°S[J]. Global Biogeochemical Cycles,2014-01-01,28(1)