seanoe:91758 DEPUYDt Pauline Univ Angers, Nantes Université, Le Mans Université, CNRS, UMR 6112, Laboratoire de Planétologie et Géosciences, F-49000 Angers, France pauline.depuydt@univ-angers.fr 2024-01-02 ISO 19115:2003/19139 1.0 New insights on the glacial-interglacial dynamics of the European Slope Current based on a 36,000-year sediment record from the southern Bay of Biscay 2022-11 2024-01-02 Depuydt Pauline, Toucanne Samuel, Barras Christine, Michel Elisabeth, Le Houedec Sandrine, Mojtahid Meryem (2022). New insights on the glacial-interglacial dynamics of the European Slope Current based on a 36,000-year sediment record from the southern Bay of Biscay. SEANOE. https://doi.org/10.17882/91758 In the mid-latitudes of the northeast Atlantic, the study of the upper branch of the AMOC is poorly documented. This study provides a complete record of the glacial, deglacial and Holocene dynamics of the easternmost portion of the upper branch of the AMOC, namely the European Slope Current and its glacial equivalent know as the Glacial Eastern Boundary Current (GEBC). To do so, we use core SU81-44 (~1000 m water depth) from the of southern Bay of Biscay (BoB)  upper slope, .The aim of this study is to reconstruct paleoenvironmental and hydrodynamic changes using a multiproxy approach (i.e. benthic foraminiferal assemblage, grain size proxies, oxygen and carbon stable isotopes, and foraminiferal εNd). During the glacial period and the onset of the deglaciation, our results show that the grain size proxies together with the relative densities of the high-energy indicator species Trifarina angulosa and the low oxygen tolerant Globobulimina spp. showed significant fluctuations. These were concomitant with the main climate changes recognized over this period and with the glacial slope paleoflow reconstruction from the northern BoB. This highlights a strong climatic/oceanographic forcing on the sedimentary characteristics of the region and a prominent forcing by changes in near-bottom flow speed. Our data also provide a new constraint on the strength of the slope current in the region during the late deglaciation and Holocene periods. We observe a reinvigoration of the upper branch of the AMOC during the Bølling-Allerød warming, preceding the abrupt resumption of the deeper branch of the AMOC in the western North Atlantic. This seems to confirm the crucial role of the European Slope Current in deep water formation, as it is the case today. Finally, our data show a progressive weakening of the ESC during the Holocene and we hypothesize a link with the long-term dynamics of the subpolar gyre. DEPUYDt Pauline Univ Angers, Nantes Université, Le Mans Université, CNRS, UMR 6112, Laboratoire de Planétologie et Géosciences, F-49000 Angers, France pauline.depuydt@univ-angers.fr TOUCANNE Samuel Univ Brest, CNRS, Ifremer, Geo-Ocean, F-29280 Plouzané, France BARRAS Christine Univ Angers, Nantes Université, Le Mans Université, CNRS, UMR 6112, Laboratoire de Planétologie et Géosciences, F-49000 Angers, France MICHEL Elisabeth Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, l'Orme des merisiers, F-91191 Gif-sur-Yvette, France LE HOUEDEC Sandrine Univ Angers, Nantes Université, Le Mans Université, CNRS, UMR 6112, Laboratoire de Planétologie et Géosciences, F-49000 Angers, France Now at Department of Earth Sciences, University of Geneva, 13 rue des Maraichers, Genève, Switzerland MOJTAHID Meryem Univ Angers, Nantes Université, Le Mans Université, CNRS, UMR 6112, Laboratoire de Planétologie et Géosciences, F-49000 Angers, France SEANOE https://www.seanoe.org/data/00806/91758/illustration.gif The modern oceanographic configuration in the Bay of Biscay. Benthic foraminifera Grain size Heinrich Stadials Deglacial period Holocene Bølling–Allerød interstadial Northeast Atlantic AMOC GEBC Marine geology Benthic habitats Currents ODATIS aggregation parameters and Essential Variable names 2024-09-16 geonetwork.thesaurus.external.theme.NVS.OD1 Marine geology SeaDataNet Parameter Disciplines 2021-04-07 geonetwork.thesaurus.external.parameter.NVS.P08 /Observational data/in-situ Type de jeux de donnée ODATIS 2024-10-15 geonetwork.thesaurus.local.theme.type_jeux_donnee CC-BY (Creative Commons - Attribution) Last Glacial – Holocene variability of the European Slope Current, NE Atlantic 2024 Elsevier BV Depuydt P. Toucanne Samuel Barras C. Le Houedec S. Mojtahid M. 10.1016/j.palaeo.2023.111884 Implication of size fraction on benthic foraminiferal-based paleo-reconstructions: A case study from the Bay of Biscay (NE Atlantic) 2023 Elsevier BV Depuydt Pauline Barras Christine Toucanne Samuel Fossile Eleonora Mojtahid Meryem 10.1016/j.marmicro.2023.102242 oceans -15.644531 0.703125 41.819566 53.369509 XLS, XLSX https://www.seanoe.org/data/00806/91758/data/97831.xlsx WWW:DOWNLOAD-1.0-link--download Raw data Foraminiferal data_SU81-44 - 56 KB https://www.seanoe.org/data/00806/91758/data/97832.xlsx WWW:DOWNLOAD-1.0-link--download Raw data Chronological data_ SU81-44 - 15 KB https://www.seanoe.org/data/00806/91758/data/97833.xlsx WWW:DOWNLOAD-1.0-link--download Raw data Grain size data_SU81-44 - 96 KB https://www.seanoe.org/data/00806/91758/data/97834.xlsx WWW:DOWNLOAD-1.0-link--download Raw data Isotopes data_ SU81-44 - 21 KB https://www.seanoe.org/data/00806/91758/data/97835.xlsx WWW:DOWNLOAD-1.0-link--download Raw data XRF Ca/Ti data_SU81-44 - 30 KB https://doi.org/10.17882/91758 WWW:LINK-1.0-http--metadata-URL DOI of the product https://www.seanoe.org/data/00806/91758/ rel-canonical Seanoe