East Greenland Shelf Sediment Data from 1850-1986 AD Alonso-García, M.; Andrews, J.T.; Belt, S.T; Cabedo-Sanz, P.; Darby, D.; Jaeger, J.M. Alonso-García, M. Andrews, J.T. Belt, S.T Cabedo-Sanz, P. Darby, D. Jaeger, J.M. earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Northeast Greenland Shelf ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Bering Strait ) earth science/paleoclimate/paleoceanography (mineral index,sediment,null,count per gram,null,paleoceanography,null,null,N,Hematite stained quartz and feldspar grains) earth science/paleoclimate/paleoceanography (provenance,null,null,fraction,null,paleoceanography,null,null,N,Kangerdlugssuaq Fjord source) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Axel Heiberg & Ellef Ringnes Islands) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to East of Cape Shelagsk ) earth science/paleoclimate/paleoceanography (provenance,null,null,fraction,null,paleoceanography,null,null,N,Nansen Fjord source) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Devon & SW Ellesmere Islands ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Nansen Sound Area ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to South of Stappen Island between Svalbard and Norway ) earth science/paleoclimate/paleoceanography (organic carbon,null,null,percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (volcanic material,null,null,percent,null,paleoceanography,null,null,N,volcanic glass) earth science/paleoclimate/paleoceanography (mica group,null,null,percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to S central Kara Sea ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Cornwall Island ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N, Grains matched to Yermak Plateau ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to S Greenland ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to N Iceland ) earth science/paleoclimate/paleoceanography (ice rafted debris,null,null,count per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (provenance,null,null,fraction,null,paleoceanography,null,null,N,unexplained source) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Victoria & Banks Islands ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to East of Svalbard ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to central Bering Chukchi Sea ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Canadian Sources except SE Ellesmere ) earth science/paleoclimate/paleoceanography (mineral index,null,null,percent,null,paleoceanography,null,null,N,Hematite stained quartz and feldspar grains) earth science/paleoclimate/paleoceanography (mineral index,sediment,null,count per gram,null,paleoceanography,null,null,N,quartz and feldspar) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to North Greenland ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Melville & Bathurst Islands ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Liard & Root Rivers (MacKenzie R) ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Pechora Sea near Pechora River ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to West of Wrangel Island ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Bathurst Island ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to SE Ellesmere Island Alexandra Fiord and Cadogon Inlet) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Northern Kara Sea ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to W Bering Chukchi Sea ) earth science/paleoclimate/paleoceanography (ice proxy with 25 carbon atoms,null,null,parts per billion,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (mineral index,null,null,percent,null,paleoceanography,null,null,N,quartz and feldspar) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to MacKenzie Delta ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Kolyma River delta offshore area ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Axel Heiburg Island ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to West of Franz Josef Land ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to E Bering Chukchi Sea ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to E Greenland ) earth science/paleoclimate/paleoceanography (highly-branched isoprenoid alkene,null,null,parts per billion,null,paleoceanography,null,null,N,di-unsaturated HBI diene) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to N.Slope Axel Heiberg ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Peninsula NW Devon Isl. ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to east of Hershel Island ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to north of Alaska inner shelf ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Yenisey River near mouth ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to West Laptev Sea ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Off Indigirka Delta ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Southeast of Svalbard ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Between Severaya Zemlya & Tamir Pennisula ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to W Iceland ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Yermak palteau + Svalbard ) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (brassicasterol,null,null,microgram per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,year Common Era,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (mineral matter,null,null,percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to North Ellesmere Island ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N, Grains matched to Ob River ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to East Laptev Sea ) earth science/paleoclimate/paleoceanography (provenance,null,null,percent,null,paleoceanography,null,null,N,Grains matched to Barents Sea North of Svalbard ) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (PO175GKC>LATITUDE 66.204>LONGITUDE -31.985) The reduction in sea ice along the SE Greenland coast during the last century has severely impacted ice-rafting to this area. In order to reconstruct ice-rafting and oceanographic conditions in the area of Denmark Strait during the last ~150 yr we conducted a multi-proxy study on three short (20 cm) sediment cores from outer Kangerdlugssuaq Though (~300m water depth). The proxy-based data obtained has been compared with historical and instrumental data to gain a better understanding of the ice sheet-ocean interactions in the area. A robust chronology has been developed based on 210Pb and 137Cs measurements on core PO175GKC#9 (~66.2°N, 32°W) and expanded to the two adjacent cores based on correlations between calcite weight% records. Our proxy records include sea ice and phytoplankton biomarkers, and a variety of mineralogical determinations based on the <2 mm sediment fraction, including identification with quantitative X-ray diffraction, ice-rafted debris counts o! n the 63-150 µm sand fraction, and source identifications based on the composition of Fe oxides in the 45-250 µm fraction. A multivariate statistical analysis indicated significant correlations between our proxy records and historical data, especially with the mean annual temperature data from Stykkisholmur (Iceland) and the storis index (historical observations of sea ice export via the East Greenland Current). In particular, the biological proxies (calcite wt%, IP25, and TOC%) showed significant linkage with the storis index. Our records show two distinct intervals in the recent history of the SE Greenland coast. The first of these (AD 1850-1910) shows predominantly perennial sea ice conditions in the area, while the second (AD 1910-1990) shows more seasonally open water conditions. STUDY NOTES: In order to reconstruct ice-rafting and oceanographic conditions in the area of Denmark Strait during the last ~150 yr we conducted a multi-proxy study on three short (20 cm) sediment cores from outer Kangerdlugssuaq Trough (~300m water depth). The proxy-based data obtained has been compared with historical and instrumental data to gain a better understanding of the ice sheet-ocean interactions in the area. A robust chronology has been developed based on 210Pb and 137Cs measurements on core PO175GKC#9 (~66.2°N, 32°W) and expanded to the two adjacent cores based on correlations between calcite weight% records. Our proxy records include sea ice and phytoplankton biomarkers, and a variety of mineralogical determinations based on the <2 mm sediment fraction, including identification with quantitative X-ray diffraction, ice-rafted debris counts on the 63-150 µm sand fraction, and source identifications based on the composition of Fe oxides in the 45-250 µm fraction. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Alonso-García, M. Investigator : Andrews, J.T. Investigator : Belt, S.T Investigator : Cabedo-Sanz, P. Investigator : Darby, D. Investigator : Jaeger, J.M. 2014-04-02 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/16256 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-sed.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-gkc8-biom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-ird.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-gkc9-biom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-feox.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-sed.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-gkc8-biom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-ird.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-gkc9-biom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-feox.txt English https://www.ncdc.noaa.gov/paleo/study/16256 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-sed.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-gkc8-biom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-ird.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-gkc9-biom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/alonso-garcia2013/alonso-garcia2013-feox.txt Alonso-García, M., J.T. Andrews, S.T. Belt, P. Cabedo-Sanz, D. Darby, and J. Jaeger2013A comparison between multiproxy and historical data (AD 1990-1840) of drift ice conditions on the East Greenland shelf (~66°N)The Holocene23121672-168310.1177/0959683613505343 START YEAR: 1851 AD * END YEAR: 1986 AD -31.985 66.204 -31.985 66.204