Particle fluxes and recent sediment accumulation on the Aquitanian margin of Bay of Biscay
As a part of the ANR-Forclim experiment, particle mass fluxes and sedimentation processes were investigated on the slope of Aquitanian margin of the Bay of Biscay, between the canyons of Cap-Breton and Cap-Ferret. Interface sediments were collected along a depth transect from 145 to 2000 m; simultan...
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ftunivangokina:oai:okina.univ-angers.fr:3900 2023-05-15T17:34:25+02:00 Particle fluxes and recent sediment accumulation on the Aquitanian margin of Bay of Biscay S. Schmidt H. Howa H. Morteau F. Lombard P. Anschutz L. Labeyrie 2009 http://okina.univ-angers.fr/publications/ua3900 https://doi.org/10.1016/j.csr.2008.11.018 eng eng Elsevier Continental Shelf Research Bay Biscay of Article scientifique dans une revue à comité de lecture 2009 ftunivangokina https://doi.org/10.1016/j.csr.2008.11.018 2017-04-13T17:49:00Z As a part of the ANR-Forclim experiment, particle mass fluxes and sedimentation processes were investigated on the slope of Aquitanian margin of the Bay of Biscay, between the canyons of Cap-Breton and Cap-Ferret. Interface sediments were collected along a depth transect from 145 to 2000 m; simultaneously a mooring line was deployed at the deepest station (WH, 2000 m) with two traps (800 and 1700 m) for a 16-month period (June 2006–November 2007). 210Pb activities of settling particles and of interface sediments were determined to study transport processes of particles. Sediment and mass accumulation rates, calculated from excess 210Pb profiles in the sediment column, show the expected decreasing trend with depth, as usually observed on margins. Mean particulate mass fluxes at 800 and 1700-m depth at site WH are, respectively, 27 and 70 g m−2 a−1.The 210Pb budget points out events of temporary high lateral input of particles. The comparison of mass and 210Pb fluxes between the water column and the seabed indicates that lateral transport plays an important role in particle accumulation on the Aquitanian margin. Regarding the objectives of the ANR-Forclim program, which aims to improve significantly the interpretation of fossil foraminifera signals, as a proxy for hydrological changes in the North Atlantic ocean, these results highlight advection processes must be considered when interpreting fluxes of foraminifers on the Aquitanian margin. Article in Journal/Newspaper North Atlantic Université Angers: Okina (Open Knowledge, INformation, Access) Continental Shelf Research 29 8 1044 1052 |
institution |
Open Polar |
collection |
Université Angers: Okina (Open Knowledge, INformation, Access) |
op_collection_id |
ftunivangokina |
language |
English |
topic |
Bay Biscay of |
spellingShingle |
Bay Biscay of S. Schmidt H. Howa H. Morteau F. Lombard P. Anschutz L. Labeyrie Particle fluxes and recent sediment accumulation on the Aquitanian margin of Bay of Biscay |
topic_facet |
Bay Biscay of |
description |
As a part of the ANR-Forclim experiment, particle mass fluxes and sedimentation processes were investigated on the slope of Aquitanian margin of the Bay of Biscay, between the canyons of Cap-Breton and Cap-Ferret. Interface sediments were collected along a depth transect from 145 to 2000 m; simultaneously a mooring line was deployed at the deepest station (WH, 2000 m) with two traps (800 and 1700 m) for a 16-month period (June 2006–November 2007). 210Pb activities of settling particles and of interface sediments were determined to study transport processes of particles. Sediment and mass accumulation rates, calculated from excess 210Pb profiles in the sediment column, show the expected decreasing trend with depth, as usually observed on margins. Mean particulate mass fluxes at 800 and 1700-m depth at site WH are, respectively, 27 and 70 g m−2 a−1.The 210Pb budget points out events of temporary high lateral input of particles. The comparison of mass and 210Pb fluxes between the water column and the seabed indicates that lateral transport plays an important role in particle accumulation on the Aquitanian margin. Regarding the objectives of the ANR-Forclim program, which aims to improve significantly the interpretation of fossil foraminifera signals, as a proxy for hydrological changes in the North Atlantic ocean, these results highlight advection processes must be considered when interpreting fluxes of foraminifers on the Aquitanian margin. |
format |
Article in Journal/Newspaper |
author |
S. Schmidt H. Howa H. Morteau F. Lombard P. Anschutz L. Labeyrie |
author_facet |
S. Schmidt H. Howa H. Morteau F. Lombard P. Anschutz L. Labeyrie |
author_sort |
S. Schmidt |
title |
Particle fluxes and recent sediment accumulation on the Aquitanian margin of Bay of Biscay |
title_short |
Particle fluxes and recent sediment accumulation on the Aquitanian margin of Bay of Biscay |
title_full |
Particle fluxes and recent sediment accumulation on the Aquitanian margin of Bay of Biscay |
title_fullStr |
Particle fluxes and recent sediment accumulation on the Aquitanian margin of Bay of Biscay |
title_full_unstemmed |
Particle fluxes and recent sediment accumulation on the Aquitanian margin of Bay of Biscay |
title_sort |
particle fluxes and recent sediment accumulation on the aquitanian margin of bay of biscay |
publisher |
Elsevier |
publishDate |
2009 |
url |
http://okina.univ-angers.fr/publications/ua3900 https://doi.org/10.1016/j.csr.2008.11.018 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Continental Shelf Research |
op_doi |
https://doi.org/10.1016/j.csr.2008.11.018 |
container_title |
Continental Shelf Research |
container_volume |
29 |
container_issue |
8 |
container_start_page |
1044 |
op_container_end_page |
1052 |
_version_ |
1766133238941614080 |