RESEARCH PAPER
Variations in the radiocarbon calibration curves around known and suspected Δ¹⁴C excursions
1
Laboratory for Environmental Radioisotope Analyses, AGH University of Kraków, Poland
2
Institute of Physics - Centre for Science and Education, Silesian University of Technology, Poland
3
Department of General Geology and Geoturism, AGH University of Kraków, Poland
Submission date: 2024-07-25
Acceptance date: 2025-11-07
Online publication date: 2025-11-27
Publication date: 2025-11-27
Corresponding author
Jacek Pawlyta
Laboratory for Environmental Radioisotope Analyses, AGH University of Kraków, Miękinia 381, 32-065, Krzeszowice, Poland
Laboratory for Environmental Radioisotope Analyses, AGH University of Kraków, Miękinia 381, 32-065, Krzeszowice, Poland
Geochronometria 2025;52(1)
KEYWORDS
TOPICS
ABSTRACT
The rapid increase in tree-ring radiocarbon concentration of 12‰ between 774–775 CE marked the first confirmed cosmic-origin event identified through annual tree-ring records. Subsequent studies have in-dependently verified this signal in dendrochronologically dated material from multiple regions, confirm-ing its global nature. Since then, several comparable events have been identified across different peri-ods. These radiocarbon spikes are of particular importance because they provide precise annual tie-points that can significantly improve chronological resolution in fields such as archaeology and geology. In this paper, we present a simple method for detecting such events in high-resolution radiocarbon da-tasets.
ACKNOWLEDGEMENTS
This work was partly supported by the National Science Centre, Poland, grant UMO-2022/45/B/ST10/02095, EUROPLANET24 grant 20-EPN2-018 and Nagoya Uni-versity ISEE -International Joint Research Program-00027. Publication supported as part of the Excellence Initiative – Research University program implemented at the Silesian University of Technology, year 2022 (14/020/SDU/10-27-01). This work was partly supported by AGH University grant 16.16.140.315.
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| eISSN: | 1897-1695 |
| ISSN: | 1733-8387 |
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