Radiocarbon dating and creationism
For example, in AD 774–775 there was an increase of 1.2% in the C content of tree rings, which was about 20 times as high as the background rate of variation.[ix] This “spike” was followed by a decline that lasted several years.
The cause of this difference is thought to be a solar flare, as the same signal is found in C in tree rings around the world, including Germany, Russia, the United States, and New Zealand.[x] Other researchers have noted similar findings.[xi] Do we know whether other solar flares like this occurred thousands of years ago? Heavy or light carbon atoms can become trapped, or at least concentrated, in “carbon reservoirs” where carbon isotopes do not quickly mix with the atmosphere.[xii] As a result, some modern deep ocean organics show a carbon age of 1,500 carbon years, for example.
Nearby limestone can also affect carbon isotope concentrations, giving false ages—or at least ages that need even more corrections. Geologic indicators show that atmospheric COC concentration, again making artifacts look older than they are. Several thousand years ago, Earth’s magnetic field may have been twice as strong as today, assuming today’s decay rate.[xiv] This would have slowed the rate at which cosmic radiation generates .
Carbon dating works by basing an age calculation on the ratio of radioactive carbon (C) in the atmosphere before nuclear bomb testing to the same ratio in the sample. Using a formula that compares that ratio to a standard modern ratio produces a “percent modern carbon” (p MC) value that scientists use to estimate carbon ages for carbon-containing materials.The New Zealand curve is representative for the Southern Hemisphere, the Austrian curve is representative for the Northern Hemisphere.Atmospheric nuclear weapon tests almost doubled the concentration of 14C in the Northern Hemisphere. [vi] How would a recent past of high volcanism, as shown by ancient lava fields, ash falls, and dead volcanoes, have affected ancient carbon isotope ratios?Just a partial list of these factors includes: Factor 1: Forest fires.Massive forest fires can change C coming into the atmosphere than what we’d had previous to those atom bomb tests.”[iv] Researchers have found clever ways to normalize measurements to pre-bomb levels, but these extra complications may add more uncertainty to radiocarbon-based age assignments.