GEOB 300 - Modelled soil temperatures for a homogeneous soil.
This web-applet illustrates the analytical solution for the heat flux equation we discussed in Lecture 13. We assume a homogeneous soil and apply a sinusoidal daily course of the surface temperature (first graph, red curve).
The following table summarizes the settings for the above model runs:
|Run||Saturated Mineral Soil||Saturated Peat Soil|
|Soil volumentric water content &thetaw||0.45||0.15|
|Heat capacity of soil C||3.2 MJ m-3 K-1||3.9 MJ m-3 K-1|
|Thermal conductivity of soil k||1.7 W m-1 K-1||0.5 W m-1 K-1|
|Thermal diffusivity of soil µ||5.0 x 10-7 m2 s-1||1.2 x 10-7 m2 s-1|
|Amplitude of surface temperature wave ΔT0||10 K|
|Daily average surface temperature T0||15°C|
|Wave period P||86400 s (=1 day)|
|Wave lag tl||26400 s|
University of British Columbia - GEOB 300 - Designed and programmed by: firstname.lastname@example.org. Supported by a TLEF grant 'climate@ubc'.
The full source code in form of an interactive LabView VI can be downloaded from https://github.com/achristen/Soil-Temperatures