Articles | Volume 5, issue 1
https://doi.org/10.5194/gchron-5-229-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-5-229-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
04 May 2023
Research article |
| 04 May 2023
| 04 May 2023
Ultra-distal tephra deposits and Bayesian modelling constrain a variable marine radiocarbon offset in Placentia Bay, Newfoundland
Alistair J. Monteath
CORRESPONDING AUTHOR
Geography and Environmental Science, University of Southampton,
Southampton, SO17 1BJ, UK
Matthew S. M. Bolton
CORRESPONDING AUTHOR
Earth and Atmospheric Sciences, University of Alberta, Edmonton, T6G
2E3, Canada
Jordan Harvey
Earth and Atmospheric Sciences, University of Alberta, Edmonton, T6G
2E3, Canada
Marit-Solveig Seidenkrantz
Department of Geoscience, Arctic Research Centre, and iClimate, Aarhus
University, Aarhus, 8000, Denmark
Christof Pearce
Department of Geoscience, Arctic Research Centre, and iClimate, Aarhus
University, Aarhus, 8000, Denmark
Britta Jensen
Earth and Atmospheric Sciences, University of Alberta, Edmonton, T6G
2E3, Canada
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Short summary
Accurately dating ocean cores is challenging because the radiocarbon age of water masses varies substantially. We identify ash fragments from eruptions more than 4000 km from their source and use these time markers to develop a new age–depth model for an ocean core in Placentia Bay, North Atlantic. Our results show that the radiocarbon age of waters masses in the bay varied considerably during the last 10 000 years and highlight the potential of using ultra-distal ash deposits in this region.
Accurately dating ocean cores is challenging because the radiocarbon age of water masses varies...
