Abstract
Carbon isotope 14С is produced in the Earth’s atmosphere by energetic cosmic-ray (CR) particles. The data on its atmospheric abundance are used to reconstruct the rate of its production and to analyze past levels of CR intensity and solar activity. These data are obtained via measurement of the 14С abundance in tree rings, with their real age determined dendrochronologically. The 14С abundance depends on the carbon dioxide concentration in the atmosphere and on climatic changes that affect the processes of carbon exchange between natural reservoirs. The present study reports the results of reconstruction of the production rate for cosmogenic 14С in the Earth’s atmosphere in the interval from the onset of deglaciation (~17 000 BC) to the mid-Holocene. The climatic factors mentioned above were taken into account in this reconstruction.
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ACKNOWLEDGMENTS
The work of I.V. Kudryavtsev, Yu.A. Nagovitsyn, and M.G. Ogurtsov was supported in part by the Russian Foundation for Basic Research (grant nos. 16-02-00090 and 18-02-00583) and program Presidium of RAS no. 28.
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Kudryavtsev, I.V., Volobuev, D.M., Dergachev, V.A. et al. Reconstruction of the Production Rate of Cosmogenic 14C in the Earth’s Atmosphere for 17 000–5000 BC. Geomagn. Aeron. 58, 925–929 (2018). https://doi.org/10.1134/S0016793218070137
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DOI: https://doi.org/10.1134/S0016793218070137