In this manuscript, the authors introduce a new ice-sheet model called UFEMISM. It is based on hybrid SIA-SSA dynamics for grounded ice, SSA dynamics for floating ice, and employs finite-volume techniques on an adaptive mesh for solving the model equations numerically. The SIA part of the model is verified against analytical solutions and previous results from EISMINT. An application to the Antarctic ice sheet illustrates the capability of the model to deal with real-world problems and the

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... ting time demands depending on the number of cores and the resolution. While the new model is very interesting, I find the paper pretty much incomplete. The most severe omission is that no attempt is made to verify the SSA part of the C1 GMDD Interactive comment Printer-friendly version Discussion paper