Abrupt change in atmospheric CO2 during the last ice age

TitleAbrupt change in atmospheric CO2 during the last ice age
Publication TypeJournal Article
Year of Publication2012
AuthorsAhn, Jinho, Edward J. Brook, Andreas Schmittner, and Karl Kreutz
JournalGeophys. Res. Lett.
ISBN Number0094-8276
Keywords0428 Biogeosciences: Carbon cycling (4806), 0473 Biogeosciences: Paleoclimatology and paleoceanography (3344, 4900), 0724 Cryosphere: Ice cores (4932), 1605 Global Change: Abrupt/rapid climate change (4901, 8408), 1615 Global Change: Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 4805, 4912), abrupt climate change, antarctica, carbon cycles, carbon dioxide, ice age, ice core

During the last glacial period atmospheric carbon dioxide and temperature in Antarctica varied in a similar fashion on millennial time scales, but previous work indicates that these changes were gradual. In a detailed analysis of one event we now find that approximately half of the CO2 increase that occurred during the 1500-year cold period between Dansgaard-Oeschger (DO) events 8 and 9 happened rapidly, over less than two centuries. This rise in CO2 was synchronous with, or slightly later than, a rapid increase of Antarctic temperature inferred from stable isotopes.