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Soil Science Society of America Journal Abstract -

Comparison of the Calorimetric and Flux Meter Measurements of Soil Heat Flow1


This article in SSSAJ

  1. Vol. 35 No. 5, p. 671-674
    Received: Jan 21, 1971
    Accepted: June 23, 1971

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  1. R. J. Hanks2 and
  2. H. S. Jacobs3



Comparisons of soil heat flow as estimated by the calorimetric, flux meter, and a combination of the two methods were made during the summer of 1969 in an oat field (Avena sativa L.). Error analysis indicated the calorimetric method had a smaller relative error than the combination method for daily soil heat flow measurements. The relative error for hourly and part-day measurements was about the same. Daily or part-day integrated heat flow averaged over 30 days was 24% higher for the flux meter alone than the calorimetric measurement. The combination method yielded average daily estimates that were about 65% higher than the calorimetric method. Calorimetric measurements to 16 cm and 32 cm yielded daily average values that were slightly lower than calorimetric measurements made to 64 cm. Hourly comparisons showed the correlation coefficient of the calorimetric and combination methods to be 0.97, and of the calorimetric and heat flux meter methods to be 0.93.

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