Atmospheric CO2 concentrations over the last glacial termination

A record of atmospheric carbon dioxide (CO2) concentration during the trans ition from the Last Glacial Maximum to the Holocene, obtained from the Dome Concordia, Antarctica, ice care, reveals that an increase of 76 parts per million by volume occurred over a period of 6000 years in four clearly dist inguishable intervals. The close correlation between CO2 concentration and Antarctic temperature indicates that the Southern Ocean played an important role in causing the CO2 increase. However, the similarity of changes in CO 2 concentration and variations of atmospheric methane concentration suggest s that processes in the tropics and in the Northern Hemisphere, where the m ain sources for methane are Located, also had substantial effects on atmosp heric CO2 concentrations.