Hessel de Vries, a Dutch physicist at the University of Groningen, furthered the detection methods and applications of radiocarbon dating to a variety of sciences. He has been called "the unsung hero of radiocarbon dating" by Willis.In 1958, de Vries showed that there were systematic anomalies in the carbon-14 dates of tree rings. His explanation was that the concentration of carbon-14 in the atmosphere had varied over time by up to 1%. He hypothesized that the variation might be explained by (a) something connected with climate, (b) that it was not created in the atmosphere at a uniform rate due to variations in the Earth's magnetic field, or (c) a cause lay in the Sun itself. Source
Atmospheric variation of up to 1%? Wow! That shoots the radiocarbon method down for sure doesn't it?
(Oh, wait. Scientists figured out a way to correct for atmospheric variation. Never mind.)
1% is what he claims but not fact. And if you arent sure what the effect of the carbon scources are or at what intensity at different time periods how can you make a claim that its only 1%. For example some say that we could have 500 times the amount of carbon 14 today fromjust a few thousand years ago.etc..etc...etc... Peace!