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Comparison of the Calorimetric and Flux Meter Measurements of Soil Heat Flow
Author(s) -
Hanks R. J.,
Jacobs H. S.
Publication year - 1971
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1971.03615995003500050017x
Subject(s) - avena , heat flow , calorimetry , heat flux , flux (metallurgy) , flow measurement , observational error , correlation coefficient , flow (mathematics) , approximation error , environmental science , metre , chemistry , thermodynamics , analytical chemistry (journal) , mathematics , heat transfer , mechanics , thermal , statistics , chromatography , physics , agronomy , organic chemistry , biology , astronomy
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.