An improved radiocarbon calibration dataset from Lake Suigetsu (Japan) by application of an advanced varve interpolation algorithm to an extended Lake Suigetsu varve chronology

• Project/Area Number: 15H06905
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Geology
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: SCHLOLAUT Gordon 国立研究開発法人海洋研究開発機構, 海洋掘削科学研究開発センター, ポストドクトラル研究員 (50760641)
• Project Period (FY): 2015-08-28 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: Lake Suigetsu / chronology / varves / climate reconstruction / limnology / Chronology / Suigetsu / Varves / Palaeolimnology / Palaeoclimatology / Varve / Radiocarbon / Palaeoclimate

Outline of Final Research Achievements

The Suigetsu varve chronology (i.e. the age model based on the counting of annual and seasonal laminations) was extended to the varve limit at 40.4 m core depth and the exact depth of the varve limit was reliably determined for the first time.A significantly improved varve interpolation programme was developed. In difference to the first attempt to develop such a tool for incompletely varve records (such as Lake Suigetsu) the programme can now be run fully automated and can be applied to a much wider range of archives due to the new approach of probability distribution fitting.
Alongside varve counting also high resolution microfacies data were collected. These were and are used for palaeo-environmental reconstruction, such as the climate evolution at the end of the last glaciation and high resolution flood/typhoon reconstruction for the last glacial.The data are currently used for further palaeo-environmental analysis and prepared for forthcoming publications on geochronology.

Research Products

• [Journal Article] Evidence for a bi-partition of the Younger Dryas Stadial in East Asia associated with inversed climate characteristics compared to Europe (2017)
  • Author(s): Schlolaut G., Brauer A., Nakagawa T., Lamb H.F., Tyler J.J., Staff R.A., Marshall M.H., Bronk Ramsey C., Bryant C.L., Tarasov P.E.
  • Journal Title: Nature Scientific Reports Volume: 7 Pages: 44983-44983
  • DOI: 10.1038/srep44983
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] A new high resolution glacial flood history from Japan based on the Lake Suigetsu sediment record (2017)
  • Author(s): Gordon Schlolaut, Achim Brauer, Henry F. Lamb, Michael H. Marshall, Takeshi Nakagawa, Richard A. Staff, Christopher Bronk Ramsey
  • Organizer: European Geosciences Union General Assembly
  • Place of Presentation: Austria Center Vienna, Vienna, Austria
  • Year and Date: 2017-04-18
  • Int'l Joint Research
• [Presentation] Pan-Hemispheric bi-partition of the Younger Dryas Stadial inferred from a multi-proxy study of the Lake Suigetsu sediments (2016)
  • Author(s): Gordon Schlolaut, Achim Brauer, Takeshi Nakagawa, Henry F. Lamb, Jonathan J. Tyler, Richard A. Staff, Michael H. Marshall, Christopher Bronk Ramsey, Charlotte L. Bryant, Pavel E. Tarasov,
  • Organizer: American Geophysical Union 2016 Fall Meeting
  • Place of Presentation: Moscone Center, San Francisco, USA
  • Year and Date: 2016-12-15
  • Int'l Joint Research
• [Presentation] Indications for a pan-hemispheric bi-partition of the Younger Dryas Stadial from Lake Suigetsu, Japan (2016)
  • Author(s): Gordon Schlolaut
  • Organizer: European Geosciences Union General Assembly 2016
  • Place of Presentation: Vienna International Center, Vienna, Austria
  • Year and Date: 2016-04-22