Uncertainties in the modelled CO2 threshold for Antarctic glaciation

• Published in: Climate of the Past
• Main Authors: Gasson, E., Lunt, D. J., DeConto, R., Goldner, A., Heinemann, M., Huber, M., LeGrande, A. N., Pollard, D., Sagoo, N., Siddall, M., Winguth, A., Valdes, P. J.
• Format: Text
• Language: English
• Published: 2018
• Subjects: Antarctic; Pollard; Antarc*; Ice Sheet
• Online Access: https://doi.org/10.5194/cp-10-451-2014; https://cp.copernicus.org/articles/10/451/2014/

A frequently cited atmospheric CO 2 threshold for the onset of Antarctic glaciation of ~780 ppmv is based on the study of DeConto and Pollard (2003) using an ice sheet model and the GENESIS climate model. Proxy records suggest that atmospheric CO 2 concentrations passed through this threshold across...