Sources and transport of dissolved iron and manganese along the continental margin of the Bay of Biscay
Dissolved iron (DFe; <0.2 µm) and dissolved manganese (DMn; <0.2 µm) 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 contin...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2007-01-01
|
| Series: | Biogeosciences |
| Online Access: | http://www.biogeosciences.net/4/181/2007/bg-4-181-2007.pdf |
| _version_ | 1811254675861667840 |
|---|---|
| author | A. La&euml;s A. La&euml;s S. Blain P. Laan S. J. Ussher E. P. Achterberg P. Tréguer H. J. W. de Baar |
| author_facet | A. La&euml;s A. La&euml;s S. Blain P. Laan S. J. Ussher E. P. Achterberg P. Tréguer H. J. W. de Baar |
| author_sort | A. La&euml;s |
| collection | DOAJ |
| description | Dissolved iron (DFe; <0.2 µm) and dissolved manganese (DMn; <0.2 µm) 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 and 2.12 nM, respectively) were observed close to the bottom at depth of ca.~600–700 m. Internal wave activity and slope circulation are thought to be at the origin of this phenomenon. These processes were also very likely the cause of elevated concentrations (DFe: 1.27 nM, DMn: 2.34 nM) measured in surface waters of stations located in the same area. At stations off the continental slope, the vertical distribution of both metals were typical of open ocean conditions, indicating that inputs from the continental margin did not impact the metal distributions in the offshore waters. |
| first_indexed | 2024-04-12T17:11:16Z |
| format | Article |
| id | doaj.art-665e8ec5597b4c2ebf5c059c6fc6897e |
| institution | Directory Open Access Journal |
| issn | 1726-4170 1726-4189 |
| language | English |
| last_indexed | 2024-04-12T17:11:16Z |
| publishDate | 2007-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Biogeosciences |
| spelling | doaj.art-665e8ec5597b4c2ebf5c059c6fc6897e2022-12-22T03:23:48ZengCopernicus PublicationsBiogeosciences1726-41701726-41892007-01-0142181194Sources and transport of dissolved iron and manganese along the continental margin of the Bay of BiscayA. La&euml;sA. La&euml;sS. BlainP. LaanS. J. UssherE. P. AchterbergP. TréguerH. J. W. de BaarDissolved iron (DFe; <0.2 µm) and dissolved manganese (DMn; <0.2 µm) 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 and 2.12 nM, respectively) were observed close to the bottom at depth of ca.~600–700 m. Internal wave activity and slope circulation are thought to be at the origin of this phenomenon. These processes were also very likely the cause of elevated concentrations (DFe: 1.27 nM, DMn: 2.34 nM) measured in surface waters of stations located in the same area. At stations off the continental slope, the vertical distribution of both metals were typical of open ocean conditions, indicating that inputs from the continental margin did not impact the metal distributions in the offshore waters.http://www.biogeosciences.net/4/181/2007/bg-4-181-2007.pdf |
| spellingShingle | A. La&euml;s A. La&euml;s S. Blain P. Laan S. J. Ussher E. P. Achterberg P. Tréguer H. J. W. de Baar Sources and transport of dissolved iron and manganese along the continental margin of the Bay of Biscay Biogeosciences |
| title | Sources and transport of dissolved iron and manganese along the continental margin of the Bay of Biscay |
| title_full | Sources and transport of dissolved iron and manganese along the continental margin of the Bay of Biscay |
| title_fullStr | Sources and transport of dissolved iron and manganese along the continental margin of the Bay of Biscay |
| title_full_unstemmed | Sources and transport of dissolved iron and manganese along the continental margin of the Bay of Biscay |
| title_short | Sources and transport of dissolved iron and manganese along the continental margin of the Bay of Biscay |
| title_sort | sources and transport of dissolved iron and manganese along the continental margin of the bay of biscay |
| url | http://www.biogeosciences.net/4/181/2007/bg-4-181-2007.pdf |
| work_keys_str_mv | AT alaampeumls sourcesandtransportofdissolvedironandmanganesealongthecontinentalmarginofthebayofbiscay AT alaampeumls sourcesandtransportofdissolvedironandmanganesealongthecontinentalmarginofthebayofbiscay AT sblain sourcesandtransportofdissolvedironandmanganesealongthecontinentalmarginofthebayofbiscay AT plaan sourcesandtransportofdissolvedironandmanganesealongthecontinentalmarginofthebayofbiscay AT sjussher sourcesandtransportofdissolvedironandmanganesealongthecontinentalmarginofthebayofbiscay AT epachterberg sourcesandtransportofdissolvedironandmanganesealongthecontinentalmarginofthebayofbiscay AT ptreguer sourcesandtransportofdissolvedironandmanganesealongthecontinentalmarginofthebayofbiscay AT hjwdebaar sourcesandtransportofdissolvedironandmanganesealongthecontinentalmarginofthebayofbiscay |