North Atlantic Heinrich Layer 1 Geochemical and Stable Isotope Data Hodell, D.A.; Nicholl, J.A.; Bontognali, T.R.R.; Danino, S.; Dorador, J.; Dowdeswell, J.A.; Einsle, J.; Kuhlmann, H.; Martrat, B.; Vautravers, M.J.; Rodríguez-Tovar, F.J.; Röhl, U. Hodell, D.A. Nicholl, J.A. Bontognali, T.R.R. Danino, S. Dorador, J. Dowdeswell, J.A. Einsle, J. Kuhlmann, H. Martrat, B. Vautravers, M.J. Rodríguez-Tovar, F.J. Röhl, U. earth science/paleoclimate/paleoceanography (sample identification,null,null,null,null,paleoceanography,null,null,C,Section) earth science/paleoclimate/paleoceanography (mineral index,sediment,null,percent,null,paleoceanography,null,x-ray diffraction,N,dolomite + ankerite) earth science/paleoclimate/paleoceanography (depth,null,null,millimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (silicon,sediment,chi-square,dimensionless,null,paleoceanography,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleoceanography (lead,sediment,null,peak area integral,null,paleoceanography,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleoceanography (identified foraminifer,sediment,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (organism index,sediment,null,count,null,paleoceanography,null,null,N,benthic including ostracods) earth science/paleoclimate/paleoceanography (delta 18O,Neogloboquadrina pachyderma,null,per mil,null,paleoceanography,null,isotope ratio mass spectrometry,N,replicate) earth science/paleoclimate/paleoceanography (sample identification,null,null,null,null,paleoceanography,null,null,C,Hole) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,C,live time) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,C,material) earth science/paleoclimate/paleoceanography (total foraminifers,sediment,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,sediment,null,per mil,null,paleoceanography,null,isotope ratio mass spectrometry,N,replicate) earth science/paleoclimate/paleoceanography (depth,null,null,meter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,calendar year before 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(Globorotalia inflata,sediment,null,count,null,paleoceanography,null,null,N,G. glutinata) earth science/paleoclimate/paleoceanography (identified foraminifer,sediment,null,count,null,paleoceanography,null,null,N,G. rubescens) earth science/paleoclimate/paleoceanography (Globorotalia truncatulinoides,sediment,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (foraminifer fragmentation,sediment,null,count,null,paleoceanography,null,null,N,planktic foram fragments) earth science/paleoclimate/paleoceanography (ice rafted debris,sediment,null,percent,null,paleoceanography,null,null,N,%IRD to total >150 particles) earth science/paleoclimate/paleoceanography (ice rafted debris,sediment,null,percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (Neogloboquadrina pachyderma,sediment,null,percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,calendar kiloyear 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earth science/paleoclimate/paleoceanography (delta 18O,Neogloboquadrina pachyderma,null,per mil,null,paleoceanography,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,C,measurement date) earth science/paleoclimate/paleoceanography (dolomite,sediment,null,percent,null,paleoceanography,null,x-ray diffraction,N,null) earth science/paleoclimate/paleoceanography (albite,sediment,null,percent,null,paleoceanography,null,x-ray diffraction,N,null) earth science/paleoclimate/paleoceanography (calcium,sediment,null,peak area integral,null,paleoceanography,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleoceanography (bromine,sediment,null,peak area integral,null,paleoceanography,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleoceanography (strontium,sediment,null,peak area integral,null,paleoceanography,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleoceanography (lead,sediment,chi-square,dimensionless,null,paleoceanography,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleoceanography (density,sediment,null,gram per cubic centimeter,null,paleoceanography,null,computed tomography,N,Low Density Removed) earth science/paleoclimate/paleoceanography (identified foraminifer,sediment,null,count,null,paleoceanography,null,null,N,G. falconensis) earth science/paleoclimate/paleoceanography (foraminiferal index,sediment,null,percent,null,paleoceanography,null,null,N,% ruber+aeq+orb+rubes+falco+dig) earth science/paleoclimate/paleoceanography (Neogloboquadrina pachyderma,sediment,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,mean) earth science/paleoclimate/paleoceanography (delta 13C,Neogloboquadrina pachyderma,null,per mil,null,paleoceanography,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (chlorine,sediment,null,peak area integral,null,paleoceanography,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (U1308>LATITUDE 49.8778>LONGITUDE -24.2383) (ODP 976>LATITUDE 36.2053>LONGITUDE -4.3133) X-ray fluorescence (XRF) core scanning and X-ray computed tomography data were measured every 1 mm to study the structure of Heinrich Event 1 during the last deglaciation at International Ocean Discovery Program Site U1308. Heinrich Layer 1 comprises two distinct layers of ice-rafted detritus (IRD), which are rich in detrital carbonate (DC) and poor in foraminifera. Each DC layer consists of poorly sorted, coarse-grained clasts of IRD embedded in a dense, fine-grained matrix of glacial rock flour that is partially cemented. The radiocarbon ages of foraminifera at the base of the two layers indicate a difference of 1400 14C years, suggesting that they are two distinct events, but the calendar ages depend upon assumptions made for surface reservoir ages. The double peak indicates at least two distinct stages of discharge of the ice streams that drained the Laurentide Ice Sheet through Hudson Strait during HE1 or, alternatively, the discharge of two independent ice streams containing detrital carbonate. Heinrich Event 1.1 was the larger of the two events and began at ~16.2 ka (15.5-17.1 ka) when the polar North Atlantic was already cold and Atlantic Meridional Overturning Circulation (AMOC) weakened. The younger peak (H1.2) at ~15.1 ka (14.3 to 15.9 ka) was a weaker event than H1.1 that was accompanied by minor cooling. Our results support a complex history for Heinrich Stadial 1 (HS1) with reduction in AMOC during the early part (~20-16.2 ka) possibly driven by melting of European ice sheets, whereas the Laurentide Ice Sheet assumed a greater role during the latter half (~16.2-14.7 ka). STUDY NOTES: Sediment XRF, IRD, and stable isotope data from North Atlantic core U1308 through Heinrich Layer 1 (~16-14ka) NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Hodell, D.A. Investigator : Nicholl, J.A. Investigator : Bontognali, T.R.R. Investigator : Danino, S. Investigator : Dorador, J. Investigator : Dowdeswell, J.A. Investigator : Einsle, J. Investigator : Kuhlmann, H. Investigator : Martrat, B. Investigator : Vautravers, M.J. Investigator : Rodríguez-Tovar, F.J. Investigator : Röhl, U. 2018-07-17 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/24670 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308cxrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308age.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308axrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308ird.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308dens.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017odp976iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308bxrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308ctird.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308xrd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308cxrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308age.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308axrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308ird.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308dens.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017odp976iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308bxrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308ctird.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308xrd.txt English https://www.ncdc.noaa.gov/paleo/study/24670 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308cxrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308age.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308axrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308ird.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308dens.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017odp976iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308bxrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308ctird.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2017/hodell2017u1308xrd.txt David A. Hodell, Joseph A. Nicholl, Tomaso R.R. Bontognali, Steffan Danino, Javier Dorador, Julian A. Dowdeswell, Joshua Einsle, Holger Kuhlmann, Belen Martrat, Maryline J. Mleneck-Vautravers, Francisco Javier Rodríguez-Tovar, Ursula Röhl2017Anatomy of Heinrich Layer 1 and its role in the last deglaciationPaleoceanography and Paleoclimatology323284-30310.1002/2016PA003028https://agupubs.onlinelibrary.wiley.com/doi/10.1002/2016PA003028 START YEAR: 29854 cal yr BP * END YEAR: 9054 cal yr BP -24.2383 36.2053 -4.3133 49.8778