A Simple Method to Evaluate Daily Positive Soil Heat Flux
- 1 January 1985
- journal article
- research article
- Published by Wiley in Soil Science Society of America Journal
- Vol. 49 (1) , 45-47
- https://doi.org/10.2136/sssaj1985.03615995004900010008x
Abstract
Daily positive heat flow into soil is an important component in the energy balance of a soil surface. If surface soil heat flux is assumed to vary diurnally as a sinusoidal function of time, with frequency (ω), the daily positive soil heat flux density can be estimated from 2 ΔTo (λC/ω)0.5 where ΔTo is the amplitude of the diurnal surface temperature wave, λ the thermal conductivity, and C the volumetric heat capacity of the soil. This method of estimation requires the measurement of surface soil temperature at about sunrise and at about mid‐day to determine ΔTo. Also, water content and some soil physical properties need to be known in order to evaluate λ and C. Experimental results obtained with the method were found to be in reasonable good agreement with direct measurements from heat flux plates.This publication has 1 reference indexed in Scilit:
- Evaluation of Methods for Determining the Apparent Thermal Diffusivity of Soil Near the SurfaceSoil Science Society of America Journal, 1983