Details of Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response

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Title of datasetIntermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response
Narrative summary of datasetThe interaction between ocean circulation and ice-sheet dynamics plays a key role in the Quaternary climate. Compared to the surface and deep compartments of the Atlantic Meridional Overturning Circulation (AMOC), the study of intermediate depths during key time periods, such as Heinrich Stadials (HSs), remains poorly documented, especially in the Northeast Atlantic. Here we use benthic foraminiferal assemblage data to trace paleoenvironmental changes from ~32 to 14 ka cal BP at ~1000 m depth in the Bay of Biscay. Our results highlight the high sensitivity of benthic foraminifera, with species-specific responses, to continental (European Ice Sheet dynamics) and marine (AMOC) forcing factors during the last three HSs. In general, HSs were characterized by the concomitant presence of meso-oligotrophic and anoxia indicator species and the low abundance of high-energy indicator species. This confirms an overall sluggish intermediate circulation during the three HSs in the Northeast Atlantic. HS1 is distinctive by the abundance of high-organic flux indicator species during its early phase. This is consistent with the fact that HS1 was, by far, the most important period of ice-sheet retreat and meltwater release to the ocean over the studied time interval. Finally, foraminifera depict the mid-HS2 re-ventilation event due to regional glacier instabilities. Important Note: This submission has been initially submitted to SEA scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI. The metadata elements have been further processed (refined) in EMODnet Ingestion Service in order to conform with the Data Submission Service specifications.
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  • 486_9030060
    • Start date2009-01-01
    End date2010-12-31

    Responsible organisations

    CountryFrance
    Organisation nameIfremer, Scientific Information Systems for the sea
    Role of organisationDataset Holding Organisation
    CountryFrance
    Organisation nameSEA scieNtific Open data Edition
    Role of organisationPublisher
    How to citeDepuydt Pauline, Mojtahid Meryem, Barras Christine, Bouhdayad Fatima Zohra, Toucanne Samuel (2022). Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response. SEANOE. https://doi.org/10.17882/88029 In addition to properly cite this dataset, it would be appreciated that the following work(s) be cited too, when using this dataset in a publication : Depuydt Pauline, Mojtahid Meryem, Barras Christine, Bouhdayad Fatima Zohra, Toucanne Samuel (2022). Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response. Journal of Quaternary Science https://doi.org/10.1002/jqs.3444

    Dataset availability

    Original dataset download linkhttps://cloud.emodnet-ingestion.eu/index.php/s/69XovvSJ1QjGuu9
    Dataset formatDocuments
    Public accessNo limitations
    License for useCC-BY 4.0
    TypeDataset
    DOIhttps://doi.org/10.17882/88029

    Locations

    Map

    © OpenStreetMap contributors

    Latitude north boundary47.5
    Longitude east boundary-7
    Latitude south boundary45.5
    Longitude west boundary-3.5
    Sea areaNorth Atlantic Ocean
    Bay of Biscay
    Atlantic Ocean
    European mainland
    Northeast Atlantic Ocean (40W)
    Vertical extent maximum1360 Centimetres

    Data types, collection and processing

    Observation typeinapplicable
    ParameterSediment age
    Platform typeresearch vessel
    Platform namePourquoi pas?
    Data quality processing informationRaw data

    Process information

    Submitting organisationLaboratory Of Planetology And Geodynamics - UMR 6112 - Angers
    Submission identifier (UUID)a53ad03f-3838-8383-3830-000000088029
    Date of dataset creation2022-05-01
    Date of dataset revision2022-09-13
    Date of metadata creation2022-9-14
    Date of metadata latest revision2023-03-30
    Date of publishing2023-04-16
    Processing data centreIfremer, Scientific Information Systems for the sea
    Summary record-ID1310