[meteorite-list] Paper About A.D. 774–775 Carbon-14 Spike

[Paul H.]

Below is an interesting paper about the 
A.D. 774–775 Carbon-14 Spike.

Timothy Jull, A. J., 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.
10.1002/2014GL059874, 7 pp.

“Our results confirm an abrupt ~ 15‰ 14C activity 
increase from A.D. 774 to 776, the size and now the 
hemispheric extent of which suggest that an 
extraterrestrial influence on radiocarbon production 
is mostlikely responsible.

Abstract - http://onlinelibrary.wiley.com/doi/10.1002/2014GL059874/abstract

PDF file – http://tinyurl.com/Carbon14Spike

774–775 carbon-14 spike - http://tinyurl.com/774775carbon14 and
https://en.wikipedia.org/wiki/774–775_carbon-14_spike 

Yours,

Paul H.