[meteorite-list] Impact Origin of 775 AD Radiocarbon Spike (Anomaly) Disputed
From: Paul <etchplain_at_meteoritecentral.com>
Date: Wed, 18 Nov 2015 17:49:39 -0600 Message-ID: <564D0E93.7030801_at_att.net> Usoskin, I. G., and G. A. Kovaltsov, 2015, The carbon-14 spike in the 8th century was not caused by a cometary impact on Earth. Icarus. vol. 260, pp. 475?476 Abstract at http://www.sciencedirect.com/science/article/pii/S0019103514003200 PDF file at http://cc.oulu.fi/~usoskin/personal/Icarus_2015.pdf and preprint at http://arxiv.org/abs/1401.5945 . More Papers In List of publications: Ilya G. Usoskin at http://cc.oulu.fi/~usoskin/personal/List.html For background information about the 775 AD Radiocarbon Spike, look at: 774?775 carbon-14 spike https://en.wikipedia.org/wiki/774?775_carbon-14_spike Jull, A. J. T., I. P. Panyushkina, T. E. Lange, V. V. Kukarskih, V. S. Myglan, K. J. Clark, M. W. Salzer, G. S. Burr, and S. W. Leavitt, 2014, Excursions in the 14C record at A.D. 774?775 in tree rings from Russia and America. Geophysical Research Letters. vol. 41, no. 8, pp. 3004-3010. Abstract at http://onlinelibrary.wiley.com/doi/10.1002/2014GL059874/abstract PDF file at http://www.geo.arizona.edu/sites/www.geo.arizona.edu/files/JullAGU.pdf Neuhauser, R., and D. L. Neuhauser, 2011, Variations of 14C around AD 775 and AD 1795 ? due to solar activity. Astronomische Nachrichten / AN 999, no. 88, 789 ? 813. PDF at http://arxiv.org/pdf/1508.06745.pdf and http://www.science-media.org/userfiles/87/presentations/87_presentation_33.pdf This is my 9th try at posting this post. All of the previous ones have disappeared into the ether never to seen of acknowledged. Yours, Paul H. Received on Wed 18 Nov 2015 06:49:39 PM PST |
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