FAMOUS version xotzt (FAMOUS-ice): a general circulation model (GCM) capable of energy- and water-conserving coupling to an ice sheet model

Abstract. The physical interactions between ice sheets and their surroundings are major factors in determining the state of climate system, yet many current Earth system models omit them entirely or approximate a heavily parameterised manner. In this work we have improved snow sheet surface physics FAMOUS model, with aim improving representation polar implementing bidirectional coupling to Glimmer dynamic model using water energy fluxes calculated by FAMOUS. both low-resolution, computationally affordable used for multi-millennial simulations. Glaciated surfaces new FAMOUS-ice modelled multi-layer scheme capable simulating compaction firn percolation refreezing melt. low horizontal resolution compared is mitigated on sub-grid-scale tiles that represent different elevations within each grid box. We show approach can simulate relevant processes modern Greenland well higher-resolution coupled FAMOUS-ice–Glimmer does not drift unacceptably. thus useful tool modelling co-evolution grounded centennial millennial timescales, applications scientific questions paleoclimate future sea level rise.