snow_ground_flux

Author:

Keith Cherkauer

January 24, 1997

Computes the surface temperature under a snowpack by balancing the ground heat flux against the flux coming through the snow pack.

Gel'fan, A.N. (1989). "Comparison of Two Methods for Calculating Soil Freezing Depth", Meteorologiya i Gidrologiya, No. 2, pp 98-104.

Variable	Type	Units	Description
energy	energy_bal_struct	N/A	uses the following: double T - layer temperatures (deg C) double dz - layer thicknesses (m) double kappa - soil thermal conductivity (W/m/K) double Cs - volumetric heat capacity (J/m^3/K)
snow	snow_data_struct	N/A	uses the following: double surf_temp - depth average temperature of the surface layer (deg C) double density - snow density (kg/m^3)
Ts_old	double	deg C	upper layer snow pack temperature from previous time step
T1_old	double	deg C	lower layer snow pack temperature from previous time step
dt	double	hours	model time step
surf_temp	double	deg C	air temperature
grnd_flux	energy	W/m^2	ground heat flux

Variable	Type	Units	Description
Ts	double	deg C	surface temperature under snow pack

Page Last Modified on 7/18/97