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 |