Resistance approach for soil heat flow

The soil surface heat flux is calculated using a simplified resistance approach when a daily time resolution is used (i.e. if the “daily mean values”-option is chosen under “Run options” in Common Characteristics). The soil surface heat flux is then given by:

                                                               (4.10)

 

where the r_soil represents the integrated resistance of the uppermost 20 cm of the soil profile:

                                         (4.11)

 

where ∆z is the thickness of the soil layers, and z is the mid-point of the soil layers.