Sensitivity of Last glacial maximum ice sheets modelling to uncertainty in climate forcing

Large uncertainties exist in the volume and thickness of the Last Glacial Maximum (LGM) ice sheets. To better constrain these characteristics, climate models have been used to force ice sheet models and simulate the geometry and dynamic of the LGM ice sheets (Abe-Ouchi et al., 2007; Charbit et al., 2007; Marshall et al., 2002). But recent efforts to improve models’ representation of present day climate have not reduced the uncertainties in the modelling of past climates such as the LGM. We investigate the impact of parametric uncertainty in climate modelling on the simulation of northern hemisphere LGM ice sheets.