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Abrupt change in atmospheric CO₂ during the last ice age

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https://ir.library.oregonstate.edu/concern/articles/s1784r78t

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  • 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.
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  • Ahn, J., E. J. Brook, A. Schmittner, and K. Kreutz (2012), Abrupt change in atmospheric CO2 during the last ice age, Geophysical Research Letters, 39, L18711, doi:10.1029/2012GL053018.
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  • 39
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  • 18
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  • Financial support was provided by the Gary Comer Science and Education Foundation, National Science Foundation grants OPP 0337891, 0944764 and ATM 0602395, and Korea Meteorological Administration Research and Development Program under grant CATER 2012-7030.
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