High frequency environmental changes and deposition processes in a 2 kyr-long sedimentological record from the Cap-Breton canyon (Bay of Biscay)
The core MD03-2693 (43°39.258′N; 01°39.805′W; 431 m water depth) was collected on an abandoned meander of the Capbreton Canyon (SE Bay of Biscay), filled over the last millennia by very high sedimentation rates (mean sedimentation rate of 1.2 cm/yr) linked to its specific environmental location and...
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Online Access: | https://oskar-bordeaux.fr/handle/20.500.12278/200141 https://hdl.handle.net/20.500.12278/200141 https://doi.org/10.1177/0959683614558647 |
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/200141 2024-06-23T07:55:14+00:00 High frequency environmental changes and deposition processes in a 2 kyr-long sedimentological record from the Cap-Breton canyon (Bay of Biscay) MARY, Yannick EYNAUD, Frederique ZARAGOSI, Sebastien MALAIZE, Bruno CREMER, Michel SCHMIDT, Sabine 2014-11-27 https://oskar-bordeaux.fr/handle/20.500.12278/200141 https://hdl.handle.net/20.500.12278/200141 https://doi.org/10.1177/0959683614558647 EN eng 0959-6836 oai:crossref.org:10.1177/0959683614558647 29273154 https://oskar-bordeaux.fr/handle/20.500.12278/200141 doi:10.1177/0959683614558647 open Pas de Licence CC crossref orcid Adour River Bay of Biscay Capbreton canyon last 2000 years late Holocene Planktonic foraminifera Sciences de l'environnement Article de revue 2014 ftoskarbordeaux https://doi.org/20.500.12278/20014110.1177/0959683614558647 2024-06-03T14:02:29Z The core MD03-2693 (43°39.258′N; 01°39.805′W; 431 m water depth) was collected on an abandoned meander of the Capbreton Canyon (SE Bay of Biscay), filled over the last millennia by very high sedimentation rates (mean sedimentation rate of 1.2 cm/yr) linked to its specific environmental location and fine-grained clayed sediment decantation from the proximal canyon axis. This archive thus permits to undertake the study of late Holocene regional climatic patterns at a decadal temporal resolution. In the present work, we use data derived from planktonic foraminifera assemblages coupled to a multiproxy approach that associates grain-size measurements, x-ray fluorescence (XRF) elemental analysis and stable oxygen isotope on Globigerina bulloides shells to infer Sea Surface Temperature (SST) and Sea Surface Salinity (SSS) changes over the last two millennia. Signals reconstructed in the Bay of Biscay show significant oscillations that are consistent with well-known temperature anomalies such as the ‘Little Ice Age’ (LIA) and the ‘Medieval Warm Period’ (MWP). It additionally displays strong similarities with other areas in the western temperate and northern North Atlantic Ocean, suggesting a narrow coupling between its main gyre surface systems. Abrupt decrease of SSS together with significant change in terrigenous inputs suggests a change in precipitation regime at the onset of the LIA (around ad 1400). Moreover, superimposed to the relative long-term change in environmental parameter, the core MD03-2693 records rapid and discrete pulses of sand grain–sized material that are correlated with the local history of migration of the mouth of the Adour River. Article in Journal/Newspaper North Atlantic Planktonic foraminifera OSKAR Bordeaux (Open Science Knowledge ARchive) River Bay ENVELOPE(-55.881,-55.881,51.600,51.600) The Holocene 25 2 348 365 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
Adour River Bay of Biscay Capbreton canyon last 2000 years late Holocene Planktonic foraminifera Sciences de l'environnement |
spellingShingle |
Adour River Bay of Biscay Capbreton canyon last 2000 years late Holocene Planktonic foraminifera Sciences de l'environnement MARY, Yannick EYNAUD, Frederique ZARAGOSI, Sebastien MALAIZE, Bruno CREMER, Michel SCHMIDT, Sabine High frequency environmental changes and deposition processes in a 2 kyr-long sedimentological record from the Cap-Breton canyon (Bay of Biscay) |
topic_facet |
Adour River Bay of Biscay Capbreton canyon last 2000 years late Holocene Planktonic foraminifera Sciences de l'environnement |
description |
The core MD03-2693 (43°39.258′N; 01°39.805′W; 431 m water depth) was collected on an abandoned meander of the Capbreton Canyon (SE Bay of Biscay), filled over the last millennia by very high sedimentation rates (mean sedimentation rate of 1.2 cm/yr) linked to its specific environmental location and fine-grained clayed sediment decantation from the proximal canyon axis. This archive thus permits to undertake the study of late Holocene regional climatic patterns at a decadal temporal resolution. In the present work, we use data derived from planktonic foraminifera assemblages coupled to a multiproxy approach that associates grain-size measurements, x-ray fluorescence (XRF) elemental analysis and stable oxygen isotope on Globigerina bulloides shells to infer Sea Surface Temperature (SST) and Sea Surface Salinity (SSS) changes over the last two millennia. Signals reconstructed in the Bay of Biscay show significant oscillations that are consistent with well-known temperature anomalies such as the ‘Little Ice Age’ (LIA) and the ‘Medieval Warm Period’ (MWP). It additionally displays strong similarities with other areas in the western temperate and northern North Atlantic Ocean, suggesting a narrow coupling between its main gyre surface systems. Abrupt decrease of SSS together with significant change in terrigenous inputs suggests a change in precipitation regime at the onset of the LIA (around ad 1400). Moreover, superimposed to the relative long-term change in environmental parameter, the core MD03-2693 records rapid and discrete pulses of sand grain–sized material that are correlated with the local history of migration of the mouth of the Adour River. |
format |
Article in Journal/Newspaper |
author |
MARY, Yannick EYNAUD, Frederique ZARAGOSI, Sebastien MALAIZE, Bruno CREMER, Michel SCHMIDT, Sabine |
author_facet |
MARY, Yannick EYNAUD, Frederique ZARAGOSI, Sebastien MALAIZE, Bruno CREMER, Michel SCHMIDT, Sabine |
author_sort |
MARY, Yannick |
title |
High frequency environmental changes and deposition processes in a 2 kyr-long sedimentological record from the Cap-Breton canyon (Bay of Biscay) |
title_short |
High frequency environmental changes and deposition processes in a 2 kyr-long sedimentological record from the Cap-Breton canyon (Bay of Biscay) |
title_full |
High frequency environmental changes and deposition processes in a 2 kyr-long sedimentological record from the Cap-Breton canyon (Bay of Biscay) |
title_fullStr |
High frequency environmental changes and deposition processes in a 2 kyr-long sedimentological record from the Cap-Breton canyon (Bay of Biscay) |
title_full_unstemmed |
High frequency environmental changes and deposition processes in a 2 kyr-long sedimentological record from the Cap-Breton canyon (Bay of Biscay) |
title_sort |
high frequency environmental changes and deposition processes in a 2 kyr-long sedimentological record from the cap-breton canyon (bay of biscay) |
publishDate |
2014 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/200141 https://hdl.handle.net/20.500.12278/200141 https://doi.org/10.1177/0959683614558647 |
long_lat |
ENVELOPE(-55.881,-55.881,51.600,51.600) |
geographic |
River Bay |
geographic_facet |
River Bay |
genre |
North Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Planktonic foraminifera |
op_source |
crossref orcid |
op_relation |
0959-6836 oai:crossref.org:10.1177/0959683614558647 29273154 https://oskar-bordeaux.fr/handle/20.500.12278/200141 doi:10.1177/0959683614558647 |
op_rights |
open Pas de Licence CC |
op_doi |
https://doi.org/20.500.12278/20014110.1177/0959683614558647 |
container_title |
The Holocene |
container_volume |
25 |
container_issue |
2 |
container_start_page |
348 |
op_container_end_page |
365 |
_version_ |
1802647740727951360 |