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. In this paper, we present the GRISLI(Grenoble ice sheet and land ice) model in its newest revision (version 2.0).Whilst GRISLI is applicable to any given ice sheet, we focus here on theAntarctic ice sheet because it highlights the importance of grounding linedynamics. Important improvements have been implemented in the model since itsoriginal version ( Ritz et al. ,  2001 ) . Notably, GRISLI now includes a basalhydrology model and an explicit flux computation at the grounding line basedon the analytical formulations of Schoof ( 2007 ) or Tsai et al. ( 2015 ) . Weperform a full calibration of the model based on an ensemble of300 simulations sampling mechanical parameter space using a Latin hypercubemethod. Performance of individual members is assessed relative to thedeviation from present-day observed Antarctic ice thickness. To assess theability of the model to simulate grounding line migration, we also presentglacial–interglacial ice sheet changes throughout the last 400 kyr using thebest ensemble members taking advantage of the capacity of the model toperform multi-millennial long-term integrations. To achieve this goal, weconstruct a simple climatic perturbation of present-day climate forcingfields based on two climate proxies: atmospheric and oceanic. The modelis able to reproduce expected grounding line advances during glacial periodsand subsequent retreats during terminations with reasonableglacial–interglacial ice volume changes.

The GRISLI ice sheet model (version 2.0): calibration and validation for multi-millennial changes of the Antarctic ice sheet