Библиографическое описание:The timing of the ca-660 BCE Miyake solar-proton event constrained to between 664 and 663 BCE : научное издание / Irina P. Panyushkina [et al.]. - Текст : непосредственный // Communications Earth and Environment. - 2024. - Т. 5, № 1. - P. 454. - ISSN 2662-4435, DOI 10.1038/s43247-024-01618-x.
Аннотация:Extreme solar energetic particle events, known as Miyake events, are rare phenomena observed by cosmogenic isotopes, with only six documented. The timing of the ca. 660 BCE Miyake event remains undefined until now. Here, we assign its occurrence to 664–663 BCE through new radiocarbon measurements in gymnosperm larch tree rings from arctic-alpine biomes (Yamal and Altai). Using a 22-box carbon cycle model and Bayesian statistics, we calculate the radiocarbon production rate during the event that is 3.2–4.8 times higher than the average solar modulation, and comparable to the 774–775 CE solar-proton event. The prolonged radiocarbon signature manifests a 12‰ rise over two years. The non-uniform signal in the tree rings is likely driven by the low rate of CO2 gas exchange between the trees and the ambient atmosphere, and the high residence time of radiocarbon in the post-event stratosphere. We caution about using the event's pronounced signature for precise single-year-dating. 14 C signature in tree rings of northern Eurasia with double-pulse cosmic radiation signal and unusual cosmogenic isotope production suggests the Miyake event of 660 BCE occurred between 664–663 BCE, according to 14 C dispersion data with new time series of gymnosperm larch from arctic-alpine biomes.
Держатель оригинала документа:Data Science Department, National Physical Laboratory, Teddington, UK, Department of Geosciences, University of Arizona, Tucson, AZ, USA, Department of Mathematics, Physics and Informatics, Comenius University, Bratislava, Slovakia, Institute of Archaeology and Ethnography SB RAS, Novosibirsk, Russia, Institute of Plant and Animal Ecology UB RAS, Yekaterinburg, Russia, Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Debrecen, Hungary, Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ, USA, School for the Humanities, Siberian Federal University, Krasnoyarsk, Russia, Ural Federal University, Yekaterinburg, Russia
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