under a Creative Commons License. Climate of the Past Modelling the Early Weichselian Eurasian Ice Sheets: role of ice

Abstract. During the last glaciation, a marine ice sheet re-peatedly appeared in Eurasia. The floating part of this ice sheet was essential to its rapid extension over the seas. Dur-ing 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 im-pact 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.