e44bbc45-9924-401b-a7b8-7939fbb61db2 eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2022-09-08 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Chronological sedimentological data (radiocarbon 14C) for cores LC7 and LC12 sediment record from Blaso, a large, epishelf lake in NW Greenland collected July-August 2017 2022-09-08 creation 2022-09-08 revision 2022-09-08 publication 2022-09-08 released 1.0 https://doi.org/10.5285/e44bbc45-9924-401b-a7b8-7939fbb61db2 doi GB/NERC/BAS/PDC/01663 https://data.bas.ac.uk/ NE/N011228/1 award Please cite this item as: Smith, J., Callard, L., Sánchez Montes, M., McClymont, E., Lloyd, J., Ehrmann, W., Roberts, D., Bentley, M., Jamieson, S., Lane, T., & Darvill, C. (2022). Chronological sedimentological data (radiocarbon 14C) for cores LC7 and LC12 sediment record from Blaso, a large, epishelf lake in NW Greenland collected July-August 2017 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/e44bbc45-9924-401b-a7b8-7939fbb61db2 The dataset comprises of analyses of two sediment cores (LC12 and LC7), extracted from Blaso, a large epishelf lake on the margin of 79 degrees N Ice Shelf, NW Greenland in July-August 2017. The data are used to constrain ice shelf dynamics over the last 8500 calibrated years before present (cal. years B.P., where present is A.D. 1950). Data for the LC7 and LC12 sediment records consist of radiocarbon (14C) chronology data. Overlapping 2 m-long sediment cores were recovered with a UWITEC KOL 'Kolbenlot percussion piston corer to a total sediment depth of 3.74 m (LC7) and 5.24 m (LC12). Accelerator mass spectrometry (AMS) was used for radiocarbon (14C) dating. Core LC7: 87 m water depth; 79.589 degrees N, 22.494 degrees E. Core LC12: 90 m water depth; 79.5948 degrees N, 22.44233 degrees E. This project was funded by the Natural Environment Research Council (NERC) through Standard Grant NE/N011228/1. We thank the Alfred Wegner Institute, and particularly Angelika Humbert and Hicham Rafiq, for their significant logistic support through the iGRIFF project. Additional support was provided from Station Nord (Jorgen Skafte), Nordland Air, Air Greenland and the Joint Arctic Command. Naalakkersuisut, Government of Greenland, provided Scientific Survey (VU-00121) and Export (046/2017) licences for this work No credit. completed Smith, James A. British Antarctic Survey Researcher author Callard, Louise Newcastle University Researcher author Sánchez Montes, Maria Luisa University of Colorado Boulder Researcher author McClymont, Erin L Durham University Researcher author Lloyd, Jeremy Durham University Researcher author Ehrmann, Werner University of Leipzig Researcher author Roberts, David Durham University Researcher author Bentley, Michael J. Durham University Researcher author Jamieson, Stewart S. R. Durham University Researcher author Lane, Timothy P. Liverpool John Moores University Researcher author Darvill, Christopher M. University of Manchester Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Paleoclimate > Ocean/Lake Records > Lake Levels EARTH SCIENCE > Paleoclimate > Ocean/Lake Records > Radiocarbon theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Greenland Holocene epishelf lake ice shelf history palaeolimnology theme Blaso, NW Greenland Greenland place Geology theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions Data released under Open Government Licence V3.0: otherRestrictions No restrictions apply. url url crossReference url url crossReference url url crossReference url url crossReference url url crossReference textTable eng utf8 geoscientificInformation 22.494 22.494 79.589 79.589 2017-07-20 2017-08-16 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor text/csv text/plain bytes 4096 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=e44bbc45-9924-401b-a7b8-7939fbb61db2 WWW:LINK-1.0-http--link Get Data Download data download bytes 4096 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=e44bbc45-9924-401b-a7b8-7939fbb61db2 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Overlapping 2 m-long sediment cores were recovered with a UWITEC KOL 'Kolbenlot' percussion piston corer to a total sediment depth of 3.74 m (LC7) and 5.24 m (LC12) in Blaso (LC7: 79°35.340N, 22°29.640E, 87m; LC12: 79°35.688N, 22°26.540E, 90m). The chronology for LC7 and LC12 was established using accelerator mass spectrometry (AMS) radiocarbon (14C) dating. Where possible, calcareous microfossils (mixed benthic foraminifera) were dated, and bulk (acid insoluble organic matter) sediment was only dated in the absence of microfossils. Cores were also inspected for other datable macrofossils (mosses, algae, shells) but were found to be barren. 14C dating of samples from the lake cores, together with macro-fossils (molluscs, gastropods) from the raised marine deposits, was undertaken at the NERC Radiocarbon Laboratory (Environment) in East Kilbride, UK (SUERC-), the Keck-CCAMS, University of California, Irvine, US (UCIAMS-) and Beta Analytic, Miami, US (BETA-). Radiocarbon ages were calibrated to calendar years before present (cal. years BP, where present is A.D. 1950) using the calibration software CALIB 8.1.0 (Stuiver et al., 2021), the Marine13 calibration curve (Reimer et al., 2013), and a marine reservoir of 550 years (delta R = 150) (Morner and Funder, 1990). The Marine20 calibration was not used owing to its unsuitability for sea-ice dominated polar environments (Heaton et al., 2020). Data collection: UWITEC KOL 'Kolbenlot' percussion piston corer CALIB 8.1.0 asNeeded completed