Very little in situ produced radiocarbon retained in accumulating Antarctic ice

Ice samples from Dronning Maud Land, Antarctica, were analyzed for 14 CO2 and 14 CO by accelerator mass spectrometry. Only a small amount (2%) of in situ produced radiocarbon was detected. The calibrated radiocarbon ages, corrected for in situ produced 14 C, are in fair agreement with age estimates obtained from stratigraphical methods added to a gas inclusion model. The ages of the entrapped air range from recent to ca. 1200 AD. ” 2000 Elsevier Science B.V. All rights reserved.