First modeling of MIS 6 glacial maximum with a coupled climate model using two different topographies over North America.

First compilations of MIS 6 proxy data related to atmospheric, oceanic and ice dynamics.

Prescribing a small Laurentide ice sheet induces a shift in planetary waves causing a change in temperature and precipitation distribution in very good agreement with the proxy data.

The MIS 6 glacial maximum simulated climate is colder in the high latitudes and warmer in the tropics compared to the LGM.

The data-model comparison suggests that the Laurentide ice sheet was smaller during the MIS 6 glacial maximum than during the LGM and that the Eurasian ice sheet was larger than during the LGM.