noaa-ocean-16436 Eirik Drift MIS 11 Marine Sediment Sr-Nd-Pb Isotope Geochemistry Reyes, A.V.; Carlson, A.E.; Beard, B.L.; Hatfield, R.G.; Stoner, J.S.; Winsor, K.; Welke, B.; Ullman, D.J. Eirik Drift MIS 11 Marine Sediment Sr-Nd-Pb Isotope Geochemistry 2014-06-26 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/16436 Investigator A.V. Reyes Investigator A.E. Carlson Investigator B.L. Beard Investigator R.G. Hatfield Investigator J.S. Stoner Investigator K. Winsor Investigator B. Welke Investigator D.J. Ullman earth science paleoclimate paleoceanography 87Rb/86Sr,null,null,dimensionless,null,paleoceanography,null,null,N,CaCO3-free silt earth science paleoclimate paleoceanography 87Sr/86Sr,null,null,dimensionless,null,paleoceanography,null,thermal ionization mass spectrometry,N,CaCO3-free silt earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,sediment description earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 87Sr/86Sr,null,two standard error,dimensionless,null,paleoceanography,null,thermal ionization mass spectrometry,N,CaCO3-free silt earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,geological terrane earth science paleoclimate paleoceanography 147Sm/144Nd,null,null,dimensionless,null,paleoceanography,null,null,N,CaCO3-free silt earth science paleoclimate paleoceanography sand,dry sediment,null,weight percent,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography silt,dry sediment,null,weight percent,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography neodymium,null,null,parts per million,null,paleoceanography,null,isotope dilution mass spectrometry,N,CaCO3-free silt earth science paleoclimate paleoceanography samarium,null,null,parts per million,null,paleoceanography,null,isotope dilution mass spectrometry,N,CaCO3-free silt earth science paleoclimate paleoceanography 206Pb/204Pb,null,null,dimensionless,null,paleoceanography,null,thermal ionization mass spectrometry,N,CaCO3-free silt earth science paleoclimate paleoceanography longitude,null,null,degree west,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 143Nd/144Nd,null,null,dimensionless,null,paleoceanography,null,thermal ionization mass spectrometry,N,CaCO3-free silt earth science paleoclimate paleoceanography 143Nd/144Nd,null,two standard error,dimensionless,null,paleoceanography,null,thermal ionization mass spectrometry,N,CaCO3-free silt earth science paleoclimate paleoceanography epsilon neodymium,null,null,epsilon unit,null,paleoceanography,null,null,N,CaCO3-free silt; units relative to CHUR 143/144 Nd earth science paleoclimate paleoceanography 207Pb/204Pb,null,null,dimensionless,null,paleoceanography,null,thermal ionization mass spectrometry,N,CaCO3-free silt earth science paleoclimate paleoceanography 208Pb/204Pb,null,null,dimensionless,null,paleoceanography,null,thermal ionization mass spectrometry,N,CaCO3-free silt earth science paleoclimate paleoceanography strontium,null,null,parts per million,null,paleoceanography,null,isotope dilution mass spectrometry,N,CaCO3-free silt earth science paleoclimate paleoceanography rubidium,null,null,parts per million,null,paleoceanography,null,isotope dilution mass spectrometry,N,CaCO3-free silt earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,sample field code earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography latitude,null,null,degree north,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean geochemistry geoscientificInformation 426800 cal yr BP 391300 cal yr BP Complete 58.21 58.21 -48.37 -48.37 -3460 -3460 Ocean Atlantic Ocean North Atlantic Ocean MD99-2227>LATITUDE 58.21>LONGITUDE -48.37 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 Reyes, A.V.; Carlson, A.E.; Beard, B.L.; Hatfield, R.G.; Stoner, J.S.; Winsor, K.; Welke, B.; Ullman, D.J. 2014 Nature 510 7506 525-528 10.1038/nature13456 http://www.nature.com/nature/journal/v510/n7506/full/nature13456.html

Varying levels of boreal summer insolation and associated Earth system feedbacks led to differing climate and ice-sheet states during late-Quaternary interglaciations. In particular, Marine Isotope Stage (MIS) 11 was an exceptionally long interglaciation and potentially had a global mean sea level 6 to 13 metres above the present level around 410,000 to 400,000 years ago, implying substantial mass loss from the Greenland ice sheet (GIS). There are, however, no model simulations and only limited proxy data to constrain the magnitude of the GIS response to climate change during this 'super interglacial', thus confounding efforts to assess climate/ice--sheet threshold behaviour and associated sea-level rise. Here we show that the south GIS was drastically smaller during MIS11 than it is now, with only a small residual ice dome over southernmost Greenland. We use the strontium-neodymium-lead isotopic composition of proglacial sediment discharged from south Greenland to constrain the provenance of terrigenous silt deposited on the Eirik Drift, a sedimentary deposit off the south Greenland margin. We identify a major reduction in sediment input derived from south Greenland's Precambrian bedrock terranes, probably reflecting the cessation of subglacial erosion and sediment transport as a result of near-complete deglaciation of south Greenland. Comparison with ice-sheet configurations from numerical models suggests that the GIS lost about 4.5 to 6 metres of sea-level-equivalent volume during MIS11. This is evidence for late-Quaternary GIS collapse after it crossed a climate/ice-sheet stability threshold that may have been no more than several degrees above pre-industrial temperatures. STUDY NOTES: Sr-Nd-Pb isotope geochemistry on the 0.1M HCl-leached silt fraction of marine sediment core MD99-2227.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/reyes2014/reyes2014stream.txt Data File; Greenland Stream Sediment Sr-Nd-Pb Isotope Geochemistry GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/reyes2014/reyes2014md99-2227.txt Data File; MD99-2227 Sr-Nd-Pb Isotope Geochemistry USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11