noaa-ocean-5590 North Iceland Shelf (MD99-2269) Holocene Dinoflagellate Assemblage Data Solignac, S.; Giraudeau, J.; de Vernal, A. North Iceland Shelf (MD99-2269) Holocene Dinoflagellate Assemblage Data 2007-03-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/5590 Investigator S. Solignac Investigator J. Giraudeau Investigator A. de Vernal earth science paleoclimate paleoceanography total dinocysts,null,null,count per gram,null,paleoceanography,null,null,N,null earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,dinoflagellate assemblage,null,degree Celsius,Aug,climate reconstructions|paleoceanography,null,null,N,null earth science paleoclimate climate reconstructions|paleoceanography sea ice cover,dinoflagellate assemblage,null,month,null,climate reconstructions|paleoceanography,null,null,N,month per year earth science paleoclimate climate reconstructions|paleoceanography salinity,dinoflagellate assemblage|sea surface,null,practical salinity unit,Aug,climate reconstructions|paleoceanography,null,null,N,null earth science paleoclimate paleoceanography age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography total dinocysts,null,null,count per cubic centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate climate reconstructions|paleoceanography salinity,dinoflagellate assemblage|sea surface,null,practical salinity unit,Feb,climate reconstructions|paleoceanography,null,null,N,null earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,dinoflagellate assemblage,null,degree Celsius,Feb,climate reconstructions|paleoceanography,null,null,N,null earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean reconstruction earth science paleoclimate paleocean population abundance earth science paleoclimate paleocean age control geoscientificInformation Sea Ice Reconstruction 10280 14C yr BP 3391 14C yr BP 12030 cal yr BP 3681 cal yr BP Complete 66.63 66.63 -23.85 -23.85 -365 -365 Ocean Atlantic Ocean North Atlantic Ocean MD99-2269>LATITUDE 66.63>LONGITUDE -23.85 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Solignac, S., J. Giraudeau, and A. de Vernal. 2006. Holocene sea surface conditions in the western North Atlantic: Spatial and temporal heterogeneities. Palaeoceanography, 21: 1-16.

Holocene records of sea surface conditions in the western Nordic seas were obtained from quantitative reconstructions based on dinoflagellate cyst assemblages. Two sediment cores from the east Greenland and the north Iceland shelves provide a detailed account of the long- and short-term dynamics of the opposing flows of Arctic versus Atlantic waters. Both marker species and quantitative reconstructions depict an overall trend toward warmer winter temperatures, saltier surface waters, and decreased sea ice extent. The latter is supported by a close relationship between relative abundances of an Atlantic dinocyst species, Nematosphaeropsis labyrinthus, and ice-rafted debris (IRD) records. We propose that the late Holocene increased IRD delivery in the Denmark Strait region was primarily induced by a combination of less extensive sea ice cover under increased Atlantic water inflow and sustained iceberg calving tied to the readvance of the Greenland ice sheet. Our records thus suggest diminishing polar water supplies throughout the Holocene, although the timing of regime changes differs between the western and eastern sides of the Denmark Strait. Finally, comparison of our records with a core from southern Greenland points to very heterogeneous sea surface conditions in the western North Atlantic, which could be explained by the decoupled dynamics of the two Irminger Current branches. Similarities between the southern Greenland marine record and a continental record nearby suggest a close coupling with atmospheric processes, reminiscent of a North Atlantic Oscillationŋlike climate pattern.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m992269s-tab.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/solignac2006 USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11