Nevertheless, the excavation approach by Shahack Gross and Finkelstein is commendable in terms of methodology, focusing in detail on the archaeological soils within building structures. Such fractionation is corrected by taking into account the measured fractionation between the stable isotopes . Applying the correction suggested by McCormac , or the Southern Hemisphere dataset , such interval would be from - yr. On the other hand, if we observe the probability distributions within the calibration interval, we can see that for the Southern Hemisphere curve, the highest probability is more concentrated in the recent part of the interval, while for the uncorrected result the probability is more evenly distributed. Conversely, nuclear testing increased the amount of 14 C in the atmosphere, which attained a maximum in about of almost twice what it had been before the testing began.
For being essentially empirical, the calibration database is always increasing but just until recently a specific dataset has been published for the Southern Hemisphere samples .