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 Δ^{14}C,
D^{14}C, or δ^{14}C values 
e 
radiocarbon age calculated from published Δ^{14}C,
δ^{14}C, or pM values after removal of age correction 
f 
radiocarbon age calculated from published Δ^{14}C or
δ^{14}C 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 δ^{13}C and uncertainty 
k 
radiocarbon age normalized for isotope fractionation to
δ^{13}C = 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 nonconventional percent modern and
normalized for isotope fractionation to δ^{13}C = 25 per mil PDB
instead of to 0 per mil as originally published

m 
meters of water depth 