SG06, a fully continuous and varved sediment core from Lake Suigetsu, Japan: stratigraphy and potential for improving the radiocarbon calibration model and understanding of late Quaternary climate changes

Authors Organisations
  • Takeshi Nakagawa(Author)
    Newcastle University
  • Katsuya Gotanda(Author)
    Chiba University of Commerce
  • Tsuyoshi Haraguchi(Author)
    Osaka City University
  • Toru Danhara(Author)
    Kyoto Fission-track Co. Ltd.
  • Hitoshi Yonenobu(Author)
    Naruto University of Education
  • Achim Brauer(Author)
    German Research Center for Geoscience (GFZ)
  • Yusuke Yokoyama(Author)
    University of Tokyo
  • Ryuji Tada(Author)
    German Research Center for Geoscience (GFZ)
  • Keiji Takemura(Author)
    Kyoto University
  • Richard A. Staff(Author)
    University of Oxford
  • Rebecca Payne(Author)
    Newcastle University
  • Christopher Bronk Ramsey(Author)
    University of Oxford
  • Charlotte Bryant(Author)
    NERC Radiocarbon Facility
  • Fiona Brock(Author)
    University of Oxford
  • Gordon Schlolaut(Author)
    German Research Center for Geoscience (GFZ)
  • Michael Henry Marshall(Author)
  • Pavel Tarasov(Author)
    Free University Berlin
  • Henry Lamb(Author)
Type Article
Original languageEnglish
Pages (from-to)164–176
Number of pages13
JournalQuaternary Science Reviews
Volume36
Early online date28 Jan 2011
DOI
Publication statusPublished - 12 Mar 2012
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Abstract

The high potential of the varved sediments of Lake Suigetsu, central Japan, to provide a purely terrestrial radiocarbon calibrationmodel and a chronology of palaeoclimatic changes has beenwidely recognised for the last two decades.However, thispotential has not been fully realised since the only available long sediment core from the lake (SG93) was extracted froma single bore hole andwas therefore interrupted by gaps of unknown durationbetweensuccessive core sections. Inthe summerof2006, anewsediment core (SG06) was recovered from the lake. Four separate boreholes were drilled and the parallel sets of cores recovered were found to overlap completely, without gaps between segments. This new record provides the ability to test existing atmospheric radiocarbon calibration models, as well as to assess the scale of inter-regional leads and lags in palaeoclimatic changes over the last GlacialeInterglacial cycle. Multi-disciplinary analyses fromSG06 are still ongoing, but a reliable description of the sedimentary sequence needs to be provided to the wider science community before major outputs from the project are released, thereby allowing fully-informed critical evaluation of all subsequent releases of data based on the SG06 record. In this paper, we report key lithostratigraphic information concerning the SG06 sediment core, highlighting changes in the clarity of annual laminations (varves)with depth, and possible implications for the mechanismof the climate change.We also discuss the potential of the SG06 record to meet the fundamental goals of the INQUA-INTIMATE project.

Keywords

  • Lake Suigetsu, varves, lacustrine sediment, radiocarbon calibration, climate change