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| Fiala, M; Delille, B; Dubreuil, C; Kopczynska, E; Leblanc, K; Morvan, J; Queguiner, B; Blain, S; Cailliau, C; Conan, P; Corvaisier, R; Denis, M; Frankignoulle, M; Oriol, L; Roy, S. |
| A mesoscale study was conducted in January and February 1999 in the Crozet Basin frontal zones (43degrees50' to 45degrees20'S, 61degrees00' to 64degrees30'E) within the southernmost and easternmost convergence area of the Antarctic Circumpolar Current (ACC) and the Agulhas Return Current (ARC). Distribution of biogeochemical parameters was strongly linked to the merged Subtropical (STF) and Subantarctic (SAF) Fronts which mark the border between the cold and less saline subantarctic waters and the warm and more saline subtropical waters. This survey took place during a post-bloom period. Chlorophyll a concentrations were low throughout the study area ranging from 0.2 mug l(-1) in the Polar Frontal Zone (PFZ) to 0.4 mug l(-1) in the Subtropical Zone (STZ).... |
| Tipo: Text |
Palavras-chave: Frontal zones; Nutrients; Biogenic silica; Chlorophyll a; PCO(2); Phytoplankton; Bacteria. |
| Ano: 2003 |
URL: https://archimer.ifremer.fr/doc/00224/33557/31968.pdf |
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| Laes, Agathe; Blain, S; Laan, P; Ussher, S; Achterberg, E; Treguer, Paul; De Baar, H. J. W.. |
| Dissolved iron (DFe; <0.2 mu m) and dissolved manganese (DMn; <0.2 mu m) concentrations were determined in the water column of the Bay of Biscay (eastern North Atlantic Ocean) in March 2002. The samples were collected along a transect traversing from the European continental shelf over the continental slope. The highest DFe and DMn concentrations (2.39 nM and 6.10 nM, respectively) were observed in the bottom waters on the shelf at stations closest to the coast. The release of trace metal from resuspended particles and the diffusion from pore waters were probably at the origin of elevated DFe and DMn concentrations in the Bottom Boundary Layer (BBL). In the slope region, the highest total dissolvable iron (TDFe), DFe and DMn values (24.6 nM, 1.58 nM... |
| Tipo: Text |
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| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2689.pdf |
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| Quéroué, F; Sarthou, G; Planquette, H. F.; Bucciarelli, E; Chever, F; Van Der Merwe, P; Lannuzel, D; Townsend, A. T.; Cheize, M.; Blain, S; D'Ovidio, F; Bowie, A. R.. |
| Dissolved Fe (dFe) concentrations were measured in the upper 1300 m of the water column in the vicinity of the Kerguelen Islands as part of the second KErguelen Ocean Plateau compared Study (KEOPS2). Concentrations ranged from 0.06 nmol L-1 in offshore, Southern Ocean waters to 3.82 nmol L-1 within Hillsborough Bay, on the north-eastern coast of the Kerguelen Islands. Direct island runoff, glacial melting and resuspended sediments were identified as important inputs of dFe that could potentially fertilise the northern part of the plateau. A significant deep dFe enrichment was observed over the plateau with dFe concentrations increasing up to 1.30 nmol L-1 close to the seafloor, probably due to sediment resuspension and pore water release. Biological uptake... |
| Tipo: Dataset |
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| Ano: 2015 |
URL: http://dx.doi.org/10.17882/40729 |
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