Dating antarctic ice cores Naughty chat request from amy
It has a radioactive isotope (krypton-81) that decays very slowly, and a stable isotope (krypton-83) that does not decay.
Comparing the proportion of stable-to-radioactive isotopes provides the age of the ice.
In addition, the project investigated the dynamics of the West Antarctic Ice Sheet and cryobiology. Fudge A site in Antarctica was required to provide a Southern Hemisphere equivalent to the deep Greenland ice cores.
Krypton is produced by cosmic rays bombarding the Earth and then stored in air bubbles trapped within Antarctic ice.They are especially valuable for investigating climate forcing and response, because they record many aspects of the climate system in a common, well-dated archive.