Articles | Volume 18, issue 2
https://doi.org/10.5194/essd-18-1225-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-18-1225-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Data description article
| 
16 Feb 2026
Data description article |
| 16 Feb 2026
| 16 Feb 2026
A complete database of AMS radiocarbon estimates from Lake Baikal sediment cores with a lake-wide assessment of TOC age offsets
Samuel R. S. Newall
CORRESPONDING AUTHOR
Department of Earth Science, University of California, Santa Barbara, CA 93106, USA
Anson W. Mackay
Department of Geography, Environmental Change Research Centre, UCL, London, WC1E 6BT, UK
Natalia Piotrowska
Division of Geochronology and Environmental Isotopes, Institute of Physics – CSE, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland
Maarten Blaauw
School of Natural and Built Environment, Queen's University Belfast, Belfast, BT7 1NN, UK
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We propose a new method, the CIR Process Age Inference Algorithm, to improve age estimates from deep-sea sediment cores. It uses a Cox-Ingersoll-Ross process as a prior on inverse sedimentation rates, ensuring smooth, realistic changes with depth. The model parameters are learned from 79 sediment records. Tested on real sediment core data, our method produces more consistent, robust age estimates than the software BIGMACS, avoids alignment errors, and maintains smooth sedimentation patterns.
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Short summary
Lake sediment cores are records of ancient climate change. Radiocarbon dates provide the records a timeframe. We present a database of radiocarbon data from Lake Baikal sediment cores to aid re-use of this data, and evaluate a key correction required to use radiocarbon data. Previous studies used corrections of 380–2100 years with an uncertainty of 90 years at most. Our results (1610 ± 760 years) highlight that age offset uncertainty has been underestimated and better estimators are needed.
Lake sediment cores are records of ancient climate change. Radiocarbon dates provide the records...
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