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Aluminium In The North Atlantic Ocean And The Labrador Sea (geotraces Ga01 Section)

Title: Aluminium In The North Atlantic Ocean And The Labrador Sea (geotraces Ga01 Section): Roles Of Continental Inputs And Biogenic Particle Removal.
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Name(s): Barraqueta, Jan-Lukas Menzel, author
Schlosser, Christian, author
Planquette, Helene, author
Gourain, Arthur, author
Cheize, Marie, author
Boutorh, Julia, author
Shelley, Rachel, author
Pereira, Leonardo Contreira, author
Gledhill, Martha, author
Hopwood, Mark J., author
Lacan, Francois, author
Lherminier, Pascale, author
Sarthou, Geraldine, author
Achterberg, Eric P., author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-08-30
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The distribution of dissolved aluminium (dAl) in the water column of the North Atlantic and Labrador Sea was studied along GEOTRACES section GA01 to unravel the sources and sinks of this element. Surface water dAl concentrations were low (median of 2.5 nM) due to low aerosol deposition and removal by biogenic particles (i.e. phytoplankton cells). However, surface water dAl concentrations were enhanced on the Iberian and Greenland shelves (up to 30.9 nM) due to continental inputs (rivers, glacial flour, and ice melt). Dissolved Al in surface waters scaled negatively with chlorophyll a and biogenic silica (opal) concentrations. The abundance of diatoms exerted a significant (p < 0.01) control on the surface particulate Al (pAl) to dAl ratios by decreasing dAl levels and increasing pAl levels. Dissolved Al concentrations generally increased with depth and correlated strongly with silicic acid (R-2 > 0.76) west of the Iberian Basin, suggesting net release of dAl at depth during remineralization of sinking opal-containing particles. Enrichment of dAl at near-bottom depths was observed due to the resuspension of sediments. The highest dAl concentrations (up to 38.7 nM) were observed in Mediterranean Outflow Waters, which act as a major source of dAl to mid-depth waters of the eastern North Atlantic. This study clearly shows that the vertical and lateral distributions of dAl in the North Atlantic differ when compared to other regions of the Atlantic and global oceans. Responsible for these large inter- and intra-basin differences are the large spatial variabilities in the main Al source, atmospheric deposition, and the main Al sink, particle scavenging by biogenic particles.
Identifier: FSU_libsubv1_wos_000443197700003 (IID), 10.5194/bg-15-5271-2018 (DOI)
Keywords: atmospheric deposition, coastal waters, denmark strait overflow, dissolved aluminum, dust deposition, east greenland current, flow-injection analysis, particulate aluminum, surface waters, western mediterranean sea
Publication Note: The publisher’s version of record is available at https://doi.org/10.5194/bg-15-5271-2018
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000443197700003
Host Institution: FSU
Is Part Of: Biogeosciences.
1726-4170
Issue: iss. 16, vol. 15

Choose the citation style.
Barraqueta, J. -L. M., Schlosser, C., Planquette, H., Gourain, A., Cheize, M., Boutorh, J., … Achterberg, E. P. (2018). Aluminium In The North Atlantic Ocean And The Labrador Sea (geotraces Ga01 Section): Roles Of Continental Inputs And Biogenic Particle Removal. Biogeosciences. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000443197700003