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Thermal regime

The soil temperature at a given depth in the course of a day or a year matches more or less a sinus curve. Its amplitude decreases with increasing soil depth (attenuation of amplitude), whereas the temperature maxima and minima are increasingly delayed (phase shifting). Changes in air temperature induced by the short terme weather changes affect the soil temperature more in the upper soil layers than at greater depth.

The animation calculates the soil temperature over a day or year at a given depth as well as the depth distribution of temperature minima or maxima (defining the amplitude). Temperature propagation in a soil profile depends on the soil material and water content.

 

  

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Previous: Soil water characteristic

Next: Water distribution