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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Short summary
We investigated how the Antarctic climate and ice sheets evolved during a period of warmer-than-present temperatures 4 million years ago, during a time when the carbon dioxide concentration in the atmosphere was very similar to today's level. Using computer models to first simulate the climate, and then how the ice sheets responded, we found that Antarctica most likely lost around 8.5  m sea-level equivalent ice volume as both East and West Antarctic ice sheets retreated.
Articles | Volume 13, issue 7
Clim. Past, 13, 959–975, 2017
https://doi.org/10.5194/cp-13-959-2017
Clim. Past, 13, 959–975, 2017
https://doi.org/10.5194/cp-13-959-2017

Research article 27 Jul 2017

Research article | 27 Jul 2017

Antarctic climate and ice-sheet configuration during the early Pliocene interglacial at 4.23 Ma

Nicholas R. Golledge et al.

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Cited articles

Aitken, A., Roberts, J., van Ommen, T., Young, D., Golledge, N., Greenbaum, J., Blankenship, D., and Siegert, M.: Repeated large-scale retreat and advance of Totten Glacier indicated by inland bed erosion, Nature, 533, 385–389, 2016.
Bohaty, S. and Harwood, D.: Southern Ocean Pliocene paleotemperature variation from high-resolution silicoflagellate biostratigraphy, Mar. Micropaleontol., 33, 241–272, 1998.
Bueler, E. and Brown, J.: Shallow shelf approximation as a “sliding law” in a thermomechanically coupled ice sheet model, J. Geophys. Res., 114, F03008, https://doi.org/10.1029/2008JF001179, 2009.
Clark, N., Williams, M., Hill, D., Quilty, P., Smellie, J., Zalasiewicz, J., Leng, M., and Ellis, M.: Fossil proxies of near-shore sea surface temperatures and seasonality from the late Neogene Antarctic shelf, Naturwissenschaften, 101, 699–722, 2013.
Collins, M., Knutti, R., Arblaster, J., Dufresne, J. L., Fichefet, T., Friedlingstein, P., Gao, X., Gutowski, W. J., Johns, T., Krinner, G., Shongwe, M., Tebaldi, C., Weaver, A. J., and Wehner, M.: Long-term Climate Change: Projections, Commitments and Irreversibility, in: Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Stocker, T., Qin, D., Plattner, G.-K., Tignor, M., Allen, S., Boschung, J., Nauels, A., Xia, Y., Bex, V., and Midgley, P. M., Cambridge University Press, 1029–1136, 2013.
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Short summary
We investigated how the Antarctic climate and ice sheets evolved during a period of warmer-than-present temperatures 4 million years ago, during a time when the carbon dioxide concentration in the atmosphere was very similar to today's level. Using computer models to first simulate the climate, and then how the ice sheets responded, we found that Antarctica most likely lost around 8.5  m sea-level equivalent ice volume as both East and West Antarctic ice sheets retreated.
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