Arid
DOI10.1016/j.marchem.2007.05.007
Inputs of iron, manganese and aluminium to surface waters of the Northeast Atlantic Ocean and the European continental shelf
de Jong, Jeroen T. M.; Boye, Marie; Gelado-Caballero, Maria D.; Timmermans, Klaas R.; VeldhuiS, Marcel J. W.; Nolting, Rob F.; van den Berg, Constant M. G.; de Baar, Hein J. W.
通讯作者de Jong, Jeroen T. M.
来源期刊MARINE CHEMISTRY
ISSN0304-4203
出版年2007
卷号107期号:2页码:120-142
英文摘要

Dissolved Fe, Mn and Al concentrations (dFe, dMn and dAl hereafter) in surface waters and the water column of the Northeast Atlantic and the European continental shelf are reported. Following an episode of enhanced Saharan dust inputs over the Northeast Atlantic Ocean prior and during the cruise in March 1998, surface concentrations were enhanced up to 4 nmol L(-1) dFe, 3 nmol L(-1) dMn and 40 nmol L(-1) dAl and returned to 0.6 nmol L(-1) dFe, 0.5 nmol L(-1) dMn and 10 nmol L(-1) dAl towards the end of the cruise three weeks later. A simple steady state model (MADCOW, [Measures, C.I., Brown, E.T., 1996. Estimating dust input to the Atlantic Ocean using surface water aluminium concentrations. In: Guerzoni. S. and Chester. R. (Eds.), The impact of desert dust across the Mediterranean, Kluwer Academic Publishers, The Netherlands, pp. 301-311]) was used which relies on surface ocean dAl as a proxy for atmospheric deposition of mineral dust. We estimated dust input at 1.8 g m(-2) yr(-1) (range 1.0-2.9 g m(-2) yr-(1)) and fluxes of dFe, dMn and dAl were inferred. Mixed layer steady state residence times for dissolved metals were estimated at 1.3 yr for dFe (range 0.3-2.9 yr) and 1.9 yr for dMn (range 1.0-3.8 yr). The dFe residence time may have been overestimated and it is shown that 0.2-0.4 yr is probably more realistic. Using vertical He versus Apparent Oxygen Utilization (AOU) relationships as well as a biogeochemical two end member mixing model, regenerative Fe:C ratios were estimated respectively to be 20+/-6 and 22+/-5 mu mol Fe:mol C. Combining the atmospheric flux of dFe to the upper water column with the latter Fe:C ratio, a ’new iron’ supported primary productivity of only 15% (range 7%-56%) was deduced. This would imply that 85% (range 44-93%) of primary productivity could be supported by regenerated dFe. The open ocean surface data suggest that the continental shelf is probably not a major source of dissolved metals to the surface of the adjacent open ocean. Continental shelf concentrations of dMn, dFe, and to a lesser extent dAl, were well correlated with salinity and express mixing of a fresher continental end member with Atlantic Ocean water flowing onto the shelf. This means probably that diffusive benthic fluxes did not play a major role at the time of the cruise. (c) 2007 Elsevier B.V. All rights reserved.


英文关键词sea water trace metals eolian dust oceans continental shelves Atlantic
类型Article
语种英语
国家France ; Netherlands ; England ; Spain
收录类别SCI-E
WOS记录号WOS:000250904600002
WOS关键词FLOW-INJECTION ANALYSIS ; DISSOLVED ALUMINUM ; MARINE-PHYTOPLANKTON ; ISOPYCNAL SURFACES ; EASTERN ATLANTIC ; REDFIELD RATIOS ; BIOGENIC SILICA ; COASTAL WATERS ; PACIFIC-OCEAN ; SEAWATER
WOS类目Chemistry, Multidisciplinary ; Oceanography
WOS研究方向Chemistry ; Oceanography
来源机构French National Research Institute for Sustainable Development
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/155380
作者单位(1)CNRS UMR 6539, Inst Univ Europeen Mer, Lab Sci Environm Marin, Technopole Brest Iroise, F-29280 Plouzane, France;(2)Netherlands Inst Sea Res, NL-1790 AB Den Burg, Netherlands;(3)Univ Liverpool, Oceanog Lab, Liverpool L69 3BX, Merseyside, England;(4)Univ Las Palmas Gran Canaria, Fac Ciencias del Mar, E-35017 Las Palmas Gran Canaria, Spain
推荐引用方式
GB/T 7714
de Jong, Jeroen T. M.,Boye, Marie,Gelado-Caballero, Maria D.,et al. Inputs of iron, manganese and aluminium to surface waters of the Northeast Atlantic Ocean and the European continental shelf[J]. French National Research Institute for Sustainable Development,2007,107(2):120-142.
APA de Jong, Jeroen T. M..,Boye, Marie.,Gelado-Caballero, Maria D..,Timmermans, Klaas R..,VeldhuiS, Marcel J. W..,...&de Baar, Hein J. W..(2007).Inputs of iron, manganese and aluminium to surface waters of the Northeast Atlantic Ocean and the European continental shelf.MARINE CHEMISTRY,107(2),120-142.
MLA de Jong, Jeroen T. M.,et al."Inputs of iron, manganese and aluminium to surface waters of the Northeast Atlantic Ocean and the European continental shelf".MARINE CHEMISTRY 107.2(2007):120-142.
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