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: Article in Journal/Newspaper
• Language: English
• Published: European Geosciences Union 2014
• Subjects: Antarctic; Pollard; Antarc*; Ice Sheet
• Online Access: https://eprints.whiterose.ac.uk/98023/; https://eprints.whiterose.ac.uk/98023/1/Gasson2014.pdf; https://doi.org/10.5194/cp-10-451-2014

A frequently cited atmospheric CO2 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 CO2 concentrations passed through this threshold across t...