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Single-Year German oak and Californian Bristlecone Pine 14C Data at the Beginning of the Hallstatt Plateau from 856 BC to 626 BC

Part of: IntCal 20

Published online by Cambridge University Press:  16 March 2020

Simon M Fahrni Open the ORCID record for Simon M Fahrni [Opens in a new window] ,
John Southon ,
Benjamin T Fuller ,
Junghun Park Open the ORCID record for Junghun Park [Opens in a new window] ,
Michael Friedrich ,
Raimund Muscheler Open the ORCID record for Raimund Muscheler [Opens in a new window] ,
Lukas Wacker Open the ORCID record for Lukas Wacker [Opens in a new window]  and
R E Taylor
Simon M Fahrni*
Affiliation:
Department of Earth System Science, University of California, Irvine, CA, USA
John Southon
Affiliation:
Department of Earth System Science, University of California, Irvine, CA, USA
Benjamin T Fuller
Affiliation:
Department of Earth System Science, University of California, Irvine, CA, USA Department of Archaeology and Heritage Studies, School of Culture and Society, Aarhus University, Moesgård Allé 20, DK-8270, Højbjerg, Denmark
Junghun Park
Affiliation:
Korea Institute of Geoscience and Mineral Resources, 124 Gwahang-no. Yuseong-gu, Daejeon34132, Korea
Michael Friedrich
Affiliation:
Institute of Botany, University of Hohenheim, Stuttgart, Germany
Raimund Muscheler
Affiliation:
Department of Geology, Lund University, Lund, Sweden
Lukas Wacker
Affiliation:
Institute of Particle Physics, ETH, Zurich, Switzerland
R E Taylor
Affiliation:
Department of Anthropology, University of California, Riverside, CA, USA Cotsen Institute of Archaeology, University of California, Los Angeles, CA, USA
*
*Corresponding author. Email: fahrni@ionplus.ch
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Abstract

As part of the ongoing effort to improve the Northern Hemisphere radiocarbon (14C) calibration curve, this study investigates the period of 856 BC to 626 BC (2805–2575 yr BP) with a total of 403 single-year 14C measurements. In this age range, IntCal13 was constructed largely from German and Irish oak as well as Californian bristlecone pine 14C dates, with most samples measured with a 10-yr resolution. The new data presented here is the first atmospheric 14C single-year record of the older end of the Hallstatt plateau based on an absolutely dated tree-ring chronology. The data helped reveal a major solar proton event (SPE) which caused a spike in the production rate of cosmogenic radionuclides around 2610/2609 BP. This production event is thought to have reached a magnitude similar to the 774/775 AD production event but has remained undetected due to averaging effects in the decadal calibration data. The record leading up to the 2610/2609 BP event reveals a 11-yr solar cycle with varying cyclicity. Features of the new data and the benefits of higher resolution calibration are discussed.

Keywords

calibrationradiocarbonIntCaltree rings
Type
Conference Paper
Information
Radiocarbon , Volume 62 , Issue 4: IntCal20: Calibration Issue , August 2020 , pp. 919 - 937
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Copyright
© 2020 by the Arizona Board of Regents on behalf of the University of Arizona

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Footnotes

†

Deceased

References

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