10Be in the Akademii Nauk ice core – first results for CE 1590–1950 and implications for future chronology validation


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Diedrich.Fritzsche [ at ] awi.de

Abstract

<jats:title>ABSTRACT</jats:title><jats:p>Temporal variations of the radionuclide <jats:sup>10</jats:sup>Be are broadly synchronous across the globe and thus provide a powerful tool to synchronize ice core chronologies from different locations. We compared the <jats:sup>10</jats:sup>Be record of the Akademii Nauk (AN) ice core (Russian Arctic) for the time period CE 1590–1950 to the <jats:sup>10</jats:sup>Be records of two well-dated Greenland ice cores (Dye3 and NGRIP). A high correlation (<jats:italic>r</jats:italic> = 0.59) was found between the AN and Dye3 records whereas the correlation with NGRIP was distinctly lower (<jats:italic>r</jats:italic> = 0.45). Sources of deviations may include local fluctuations in the deposition of <jats:sup>10</jats:sup>Be due to changes in the precipitation patterns, and artefacts due to the core-sampling strategy. In general, the existing age model was validated, confirming the AN ice core to be a unique and well-dated source of palaeoclimate parameters for the Russian Arctic. We further used numerical simulations to test the influence of the core-sampling strategy on the results and derived an optimized sampling strategy for the deeper parts of the ice core.</jats:p>



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43915
DOI https://www.doi.org/10.1017/jog.2017.19

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VON ALBEDYLL, L. , OPEL, T. , FRITZSCHE, D. , MERCHEL, S. , LAEPPLE, T. and RUGEL, G. , Helmholtz-Zentrum Dresden-Rossendorf (2017): 10Be in the Akademii Nauk ice core – first results for CE 1590–1950 and implications for future chronology validation , Journal of Glaciology, 63 (239), pp. 514-522 . doi: https://www.doi.org/10.1017/jog.2017.19


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