DOI: 10.1002/2013GB004801
Scopus记录号: 2-s2.0-84905636408
论文题名: Evidence for production and lateral transport of dissolved organic phosphorus in the eastern subtropical North Atlantic
作者: Reynolds S ; , Mahaffey C ; , Roussenov V ; , Williams R ; G
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 8 起始页码: 805
结束页码: 824
语种: 英语
英文关键词: alkaline phosphatase
; DOP
; nutrient transport
; phosphate
; subtropical North Atlantic
Scopus关键词: concentration (composition)
; dissolved organic phosphorus
; enzyme activity
; nutrient uptake
; ocean basin
; phytoplankton
; surface water
; transport process
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: The concentration of phosphate and dissolved organic phosphorus (DOP) is chronically low and limits phytoplankton growth in the subtropical North Atlantic relative to other ocean basins. Transport of phosphate and DOP from the productive flanks of the gyre to its interior has been hypothesized as an important phosphorus supply pathway. During a cruise in the eastern Atlantic in spring 2011, the rates of phosphate uptake, alkaline phosphatase activity (APA), and DOP production were measured in the northwest African shelf region, subtropics, and tropics. Rates of DOP production were sixfold higher in the shelf region (43±41 nM d-1) relative to the subtropics (6.9±4.4 nM d-1). In contrast, APA was threefold higher in the subtropics (8.0±7.3 nM d-1), indicative of enhanced DOP utilization, relative to the shelf region (2.6±2.1 nM d-1). Hence, observations suggest net production of DOP in the shelf region and either net consumption of DOP or a near balance in DOP production and consumption in the gyre interior. Eddy-permitting model experiments demonstrate that (i) DOP accounts for over half the total phosphorus in surface waters, (ii) DOP is transported westward from the shelf region by a combination of gyre and eddy circulations, and (iii) advected DOP supports up to 70% of the particle export over much of the subtropical gyre. Our combined observational and modeling study supports the view that the horizontal transport of DOP from the shelf region is an important mechanism supplying phosphorus to the surface subtropical North Atlantic. ©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/77461
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth, Ocean and Ecological Sciences, School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom; School of Earth and Environmental Sciences, University of Portsmouth, Portsmouth, United Kingdom
Recommended Citation:
Reynolds S,, Mahaffey C,, Roussenov V,et al. Evidence for production and lateral transport of dissolved organic phosphorus in the eastern subtropical North Atlantic[J]. Global Biogeochemical Cycles,2014-01-01,28(8)