OnlyRainPrecTemp

Above this temperature all precipitation is rain.

Default

Unit

Symbol

Equation

Function

2

°C

 TRainL

(4.37)

Density of New Snow Function

OnlySnowPrecTemp

Below this temperature all precipitation is snow.

Default

Unit

Symbol

Equation

Function

0

°C

 TSnowL

(4.37)

Density of New Snow Function

RoughLMomSnow

Roughness length for momentum above snow. Used as z0M in (4.14)  but for snow surface. Used only if the surface energy is calculated by solving the energy balance at the surface. If a canopy is present, the roughness length for snow is only used if the Switch "SnowRoughness" is set to Individual.

Default

Unit

Symbol

Equation

Function

0.001

m

 z0M,snow

(4.14)

 

SThermalCondCoef

Thermal conductivity coefficient for snow.

Default

Unit

Symbol

Equation

Function

2.86E-6

W m5 °C-1 kg-2

 sk

(4.50)

Thermal Conductivity of Snow

The normal value 2.86E-6 (W m5 °C-1 kg-2) implies the thermal conductivity function for snow is valid in a range of density from 100 to 900 kg/m3. The highest density corresponds to pure ice. A square dependence of the snow density is assumed in the whole range.