6. One paragraph description of your model (e.g. abstract from report or paper); Efficient multi-layer snow model resolving internal snow processes model can be used in stand-alone-estimations as well as it can be coupled to a GCM (is implemented a ECHAM test version, will be part of a future ECHAM standard version) model has been tested under different climate conditions 50. Please provide references relevant to the model description and use. Description and use of multi-layer snow model in stand-alone-mode: Loth, B.; H. F. Graf and J. M. Oberhuber, 1993: "A Snow-Cover Model for Global Climate Simulations", J. Geophys. Res., Vol. 98 20D6, 10,451-10,464. Loth, B. and H. F. Graf, 1997: "Modelling the Snow Cover in Climate Studies, I: "Long-Term Integrations under Different Climatic Conditions Using a Multi-Layered Snow-Cover Model" II: "Sensitivity to Internal Snow Parameters and Interface Processes", J. Geophys. Res., (97JD014011 and 97JD014012) Description and verification of ECHAM&multi-layer snow model Loth, B., L. Bengtsson, L. Dümenil, D. Jacob, 1997: "An Improved Snow Physics in the ECHAM Model", (in prep., solicited paper at EGS Meeting Apr. 1997)