Inputs of iron, manganese and aluminium to surface waters of the Northeast Atlantic Ocean and the European continental shelf
International audience 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 an...
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Online Access: | https://doi.org/10.1016/j.marchem.2007.05.007 https://hal.univ-brest.fr/hal-00635518 |
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fttriple:oai:gotriple.eu:10670/1.v567wi 2023-05-15T17:41:16+02:00 Inputs of iron, manganese and aluminium to surface waters of the Northeast Atlantic Ocean and the European continental shelf De-Jong, Jeroen, Boye, Marie Gelado-Caballero, Maria, Timmermans, K. Veldhuis, Marcel Nolting, Rob, Van Den Berg, Constant M.G. De Baar, H. J. W. Royal Netherlands Institute for Sea Research (NIOZ) Oceanography Laboratories University of Liverpool Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Facultad de Ciencias del Mar University of Las Palmas de Gran Canaria (ULPGC) 2007-10-30 https://doi.org/10.1016/j.marchem.2007.05.007 https://hal.univ-brest.fr/hal-00635518 en eng HAL CCSD Elsevier hal-00635518 doi:10.1016/j.marchem.2007.05.007 10670/1.v567wi https://hal.univ-brest.fr/hal-00635518 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0304-4203 Marine Chemistry Marine Chemistry, Elsevier, 2007, 107 (2), pp.120-142. ⟨10.1016/j.marchem.2007.05.007⟩ Sea water Trace metals Eolian dust Oceans Continental shelves Atlantic envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2007 fttriple https://doi.org/10.1016/j.marchem.2007.05.007 2023-01-22T17:56:10Z International audience 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 dFe 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 μmol 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 ... Article in Journal/Newspaper Northeast Atlantic Unknown Marine Chemistry 107 2 120 142 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Sea water Trace metals Eolian dust Oceans Continental shelves Atlantic envir geo |
spellingShingle |
Sea water Trace metals Eolian dust Oceans Continental shelves Atlantic envir geo De-Jong, Jeroen, Boye, Marie Gelado-Caballero, Maria, Timmermans, K. Veldhuis, Marcel Nolting, Rob, Van Den Berg, Constant M.G. De Baar, H. J. W. Inputs of iron, manganese and aluminium to surface waters of the Northeast Atlantic Ocean and the European continental shelf |
topic_facet |
Sea water Trace metals Eolian dust Oceans Continental shelves Atlantic envir geo |
description |
International audience 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 dFe 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 μmol 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 ... |
author2 |
Royal Netherlands Institute for Sea Research (NIOZ) Oceanography Laboratories University of Liverpool Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Facultad de Ciencias del Mar University of Las Palmas de Gran Canaria (ULPGC) |
format |
Article in Journal/Newspaper |
author |
De-Jong, Jeroen, Boye, Marie Gelado-Caballero, Maria, Timmermans, K. Veldhuis, Marcel Nolting, Rob, Van Den Berg, Constant M.G. De Baar, H. J. W. |
author_facet |
De-Jong, Jeroen, Boye, Marie Gelado-Caballero, Maria, Timmermans, K. Veldhuis, Marcel Nolting, Rob, Van Den Berg, Constant M.G. De Baar, H. J. W. |
author_sort |
De-Jong, Jeroen, |
title |
Inputs of iron, manganese and aluminium to surface waters of the Northeast Atlantic Ocean and the European continental shelf |
title_short |
Inputs of iron, manganese and aluminium to surface waters of the Northeast Atlantic Ocean and the European continental shelf |
title_full |
Inputs of iron, manganese and aluminium to surface waters of the Northeast Atlantic Ocean and the European continental shelf |
title_fullStr |
Inputs of iron, manganese and aluminium to surface waters of the Northeast Atlantic Ocean and the European continental shelf |
title_full_unstemmed |
Inputs of iron, manganese and aluminium to surface waters of the Northeast Atlantic Ocean and the European continental shelf |
title_sort |
inputs of iron, manganese and aluminium to surface waters of the northeast atlantic ocean and the european continental shelf |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://doi.org/10.1016/j.marchem.2007.05.007 https://hal.univ-brest.fr/hal-00635518 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0304-4203 Marine Chemistry Marine Chemistry, Elsevier, 2007, 107 (2), pp.120-142. ⟨10.1016/j.marchem.2007.05.007⟩ |
op_relation |
hal-00635518 doi:10.1016/j.marchem.2007.05.007 10670/1.v567wi https://hal.univ-brest.fr/hal-00635518 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1016/j.marchem.2007.05.007 |
container_title |
Marine Chemistry |
container_volume |
107 |
container_issue |
2 |
container_start_page |
120 |
op_container_end_page |
142 |
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1766142730105257984 |