Uncertainties in the modelled CO 2 threshold for Antarctic glaciation

• Published in: Climate of the Past
• Main Authors: E. Gasson, D. J. Lunt, R. DeConto, A. Goldner, M. Heinemann, M. Huber, A. N. LeGrande, D. Pollard, N. Sagoo, M. Siddall, A. Winguth, P. J. Valdes
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 2014
• Subjects: Environmental pollution; TD172-193.5; Environmental protection; TD169-171.8; Environmental sciences; GE1-350; Antarctic; Pollard; Antarc*; Ice Sheet
• Online Access: https://doi.org/10.5194/cp-10-451-2014; https://doaj.org/article/252fcf52d9f54ca6908a2e717afeedbd

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...