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

Snow input is prognosticated by the atmospheric component (RAMS) of my
regional model, which is called the Coupled Hydrosphere-Atmosphere
Research Model (CHARM).  CHARM is built around RAMS; the default
configuration of RAMS has thermal storage and diffusion among 11 soil
layers, but has no snowmelt scheme.  I consider the snow to be part of 
the top soil layer for purposes of thermal capacity. Other than that, 
my added snowmelt scheme is essentially borrowed from the GFDL GCM.
Snow is specified to have higher albedo than ground. The snow is allowed 
to get colder than the freezing point if conditions dictate that, but 
never warmer. If the freezing point is reached and there is an additional 
positive input of energy (imbalance among net radiative flux, sensible
heat flux, latent heat flux, and soil heat flux), there is snowmelt equal
to that energy input divide by the latent heat of fusion. Also, 
sublimation is prescribed when the water vapor mixing ratio corresponding 
to the vapor pressure of the snow exceeds the mixing ratio of the 
overlying air; a bulk aerodynamic formulation is used to calculate the 
sublimation rate.

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

Brent M. Lofgren
Great Lakes Environmental Research         lofgren@glerl.noaa.gov
  Laboratory                               (313) 741-2383
2205 Commonwealth Blvd.                    fax:  (313) 741-2055
Ann Arbor, MI 48105