Key Notes
a uncertainty in ΔR does not include error in calibration curve
b Inclusion in regional averages not advisable
c location is approximate
d radiocarbon age calculated from published Δ14C, D14C, or δ14C values
e radiocarbon age calculated from published Δ14C, δ14C, or pM values after removal of age correction
f radiocarbon age calculated from published Δ14C or δ14C values after removal of age correction and fossil fuel correction
g(n) Exact year of death unknown. n=estimate of uncertainty in year of death, if available.
g(<) Exact year of death unknown. Sample collected prior to year given by unknown number of years
midpoint(n) For multiple samples of coral rings, n= number of years on either side of the midpoint. The radiocarbon age and error given is the weighted mean and standard deviation of the measurements.
h Computation is based on the model mixed layer radiocarbon age calculated for AD 1950
j radiocarbon age and error corrected for isotope fractionation with estimated δ13C and uncertainty
k radiocarbon age normalized for isotope fractionation to δ13C = -25 per mil PDB instead of to 0 per mil as originally published
l radiocarbon age calculated from percent modern after removal of decay from time of growth to 1950 in non-conventional percent modern and normalized for isotope fractionation to δ13C = -25 per mil PDB instead of to 0 per mil as originally published
m meters of water depth