6. One paragraph description of your model (e.g. abstract from report or
   paper);

   Energy and mass budget model of a snow cover with one
   separate snow layer
   state-of-the-art model for atmospheric climate models
         

50. Please provide references relevant to the model description and use.

Verification of ECHAM standard version:

 Foster, J.; G. Liston, R. Koster., R. Essery, H. Behr, L. Dümenil, 
 D. Verseghy, S. Thompson, D. Pollard and J. Cohen, 1996: "Snow Cover 
 and Mass Intercomparisons of General Circulation Models and Remotely 
 Sensed Data", J Clim, 9(2), 409-426.

Description of ECHAM standard version and verification of the global 
climate model ECHAM 

Roeckner, E.; K. Arpe, L. Bengtsson, M. Christoph, M. Claussen, 
L. Dümenil, M. Esch, M. Giorgetta, U. Schlese, U. Schulzweida, 1996: 
"The atmospheric circulation model ECHAM-4: Model description and 
simulation of present-day climate", MPI-Rep. 218, MPI für 
Meteorologie, Hamburg, 90 pp.