This will allow us to constrain when these features formed and when the grounding line retreated past them.These data will be integrated with recently obtained geological and glaciological data to constrain new models that will explore the mechanisms, style and timing of grounding line retreat in the SW Ronne Ice-shelf area.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.Here we re-evaluated the record of volcanic sulphate deposition using a much more extensive array of Antarctic ice cores.
She was scheduled to leave the continent the day after that, so "I have yet to become the first Tinder hookup in Antarctic history," the anonymous fellow* puts it.She was a researcher doing work at a deep field camp in the Dry Valleys. Either way, they'll both have a good story to tell.Carbon dating doesn’t work well on ice because carbon-14 is produced in the ice itself by cosmic rays and only goes back some 50,000 years.Krypton is produced by cosmic rays bombarding the Earth and then stored in air bubbles trapped within Antarctic ice.
The work was funded by the National Science Foundation and the U. “That is very exciting because a lot of interesting things happened with the Earth’s climate prior to 800,000 years ago that we currently cannot study in the ice core record.” Krypton dating is much like the more-heralded carbon-14 dating technique that measures the decay of a radioactive isotope – which has constant and well-known decay rates – and compares it to a stable isotope.