Abrupt change in atmospheric CO2 during the last ice age
|Title||Abrupt change in atmospheric CO2 during the last ice age|
|Publication Type||Journal Article|
|Year of Publication||2012|
|Authors||Ahn, Jinho, Edward J. Brook, Andreas Schmittner, and Karl Kreutz|
|Journal||Geophys. Res. Lett.|
|Keywords||0428 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.