Full discosure: As an occasional archaeologist, I have a dog in the climate fight:
Impact of fossil fuel emissions on atmospheric radiocarbon and various applications of radiocarbon over this century
Heather D. Graven h.graven@imperial.ac.ukAuthors Info & Affiliations
July 20, 2015 112 (31) 9542-9545 https://doi.org/10.1073/pnas.1504467112
Significance
A wide array of scientific disciplines and industries use radiocarbon analyses; for example, it is used in dating of archaeological specimens and in forensic identification of human and wildlife tissues, including traded ivory. Over the next century, fossil fuel emissions will produce a large amount of CO2 with no 14C because fossil fuels have lost all 14C over millions of years of radioactive decay. Atmospheric CO2, and therefore newly produced organic material, will appear as though it has “aged,” or lost 14C by decay.
By 2050, fresh organic material could have the same 14C/C ratio as samples from 1050, and thus be indistinguishable by radiocarbon dating.
Some current applications for 14C may cease to be viable, and other applications will be strongly affected
