Information on radiocarbon dating
There are separate graphs for the southern hemisphere and for calibration of marine data.
To produce a curve that can be used to relate calendar years to radiocarbon years, a sequence of securely dated samples is needed which can be tested to determine their radiocarbon age.
However, the raw data were never released by the institutions. PERNAGALLO Department of Economics and Business, University of Catania, Corso Italia 55, 95129 Catania CT, Italy and B.
In 2017, in response to a legal request, all raw data kept by the British Museum were made accessible. TORRISI Department of Economics and Business, University of Catania, Corso Italia 55, 95129 Catania CT, Italy Fair Use Quote: A telling tidbit from page 6 of 9: The same rationale applies to the intra-laboratory differences.
The curve showed two types of variation from the straight line: a long term fluctuation with a period of about 9,000 years, and a shorter term variation, often referred to as "wiggles", with a period of decades.
Suess said he drew the line showing the wiggles by "cosmic schwung" – freehand, in other words.
These were superseded by the INTCAL series of curves, beginning with INTCAL98, published in 1998, and updated in 2004, 2009, and, most recently, 2013.
The following was published yesterday, March 22, 2019, in Archaeometry, a Wiley publication.
If you don’t have institutional access you can have access for 48 hours for .00, print-restricted online access for .50 or full PDF rights for .00.
The solid line is the INTCAL13 calibration curve, and the dotted lines show the standard error range—as with the sample error, this is one standard deviation.
Simply reading off the range of radiocarbon years against the dotted lines, as is shown for sample t Variations in the calibration curve can lead to very different resulting calendar year ranges for samples with different radiocarbon ages.