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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Volume 3, issue 3
Clim. Past, 3, 375–386, 2007
https://doi.org/10.5194/cp-3-375-2007
© Author(s) 2007. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

Special issue: Modelling late Quaternary climate

Clim. Past, 3, 375–386, 2007
https://doi.org/10.5194/cp-3-375-2007
© Author(s) 2007. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  02 Jul 2007

02 Jul 2007

Modelling the Early Weichselian Eurasian Ice Sheets: role of ice shelves and influence of ice-dammed lakes

V. Peyaud, C. Ritz, and G. Krinner V. Peyaud et al.
  • Laboratoire de Glaciologie et de Géophysique de l'Environnement, Université Joseph Fourier 54, rue Molière, Domaine Universitaire, BP 96, 38402 Saint Martin d'Hères Cedex, France

Abstract. During the last glaciation, a marine ice sheet repeatedly appeared in Eurasia. The floating part of this ice sheet was essential to its rapid extension over the seas. During the earliest stage (90 kyr BP), large ice-dammed lakes formed south of the ice sheet. These lakes are believed to have cooled the climate at the margin of the ice. Using an ice sheet model, we investigated the role of ice shelves during the inception and the influence of ice-dammed lakes on the ice sheet evolution. Inception in Barents sea seems due to thickening of a large ice shelf. We observe a substantial impact of the lakes on the evolution of the ice sheets. Reduced summer ablation enhances ice extent and thickness, and the deglaciation is delayed by 2000 years.

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