Rev 5.0.1: What's changed from Rev 5.0.0
- The Southern Hemisphere calibration curve was truncated at 11000 cal BP as
reported in the Radiocarbon Calibration Issue
- The median probability is displayed in BP when requested
- Fixed a problem with plots impinging on the end of the calibration curve
- The dialog box in the Sample Significance Testing Tool reported
an incorrect number of samples, when some samples were disabled.
Rev 5.0: What's changed from Rev 4.0
A new calibration curve for the conversion of radiocarbon ages
to calibrated (cal) ages has been constructed and internationally
ratified to replace IntCal98 which extended from 0-24 ka cal
BP (Before Present, 0 cal BP = AD 1950). The new calibration dataset
for terrestrial samples extends from 0-26 ka cal BP but with
much higher resolution beyond 11.4 ka cal BP than IntCal98.
dated tree-ring samples cover the period from 0-12.4 ka cal
BP. Beyond the end of the tree-rings, data from marine records
(corals and foraminifera) are converted to the atmospheric equivalent
with a site-specific marine reservoir correction to provide terrestrial
calibration from 12.4-26.0 ka cal BP. A substantial enhancement
relative to IntCal98 is the introduction of a coherent statistical
approach based on a random walk model, which takes into account
the uncertainty in both the calendar age and the radiocarbon age
to calculate the underlying calibration curve.