2016 Fiscal Year Final Research Report
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
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Geology
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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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)
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| Project Period (FY) |
2015-08-28 – 2017-03-31
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| Keywords | Lake Suigetsu / chronology / varves / climate reconstruction / limnology |
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| 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.
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| Free Research Field |
palaeo-limnology, palaeo-climatology, chronology
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