Atmospheric CO2 and carbon cycle during the late Holocene

Thursday, 17 December 2015
Poster Hall (Moscone South)
Jinho Ahn, Seoul National University, Seoul, South Korea, Edward Brook, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States and Shaun A Marcott, University of Wisconsin Madison, Madison, WI, United States
Atmospheric CO2 records during the late Holocene are of great interest because climate boundary conditions for the time interval are similar to those of present and near future. Here we show CO2 records from West Antarctic Ice Sheet (WAIS) Divide ice core that cover the last 2500 years with 10- to 20-year resolutions. The records reveal pre-industrial CO2 variability of ~ 6 ppm on multi-centennial to millennial timescales. We found that the millennial variability is positively correlated with westerly wind stress in the Southern Ocean and the high northern hemispheric climate.