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United States Department of Agriculture

Agricultural Research Service

Title: CONSISTENCY OF MICROMETEOROLOGICAL MEASUREMENTS OF SURFACE ENERGY FLUXES.

Authors
item Twine, Tracy - UNIVERSITY OF WISCONSIN
item Kustas, William - USDA-ARS-HL
item Norman, John - UNIVERSITY OF WISCONSIN
item Cook, D -
item Houser, Paul - NASA
item Meyers, Tilden - NASA
item Prueger, John - USDA-ARS-NSTL
item Starks, Patrick

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: October 18, 1998
Publication Date: October 18, 1998

Technical Abstract: The University of Wisconsin set up an eddy covariance system next to ten other flux-measuring systems in Oklahoma during the Southern Great Plains Experiment in 1997. This suite of systems comprised seven eddy covariance systems from several manufacturers and three Bowen ratio systems from two manufacturers. Camparisons between the Wisconsin eddy covariance system and other eddy covariance latent heat flux measurements showed rms differences of 48 watts per square meter, while those between the Wisconsin eddy covariance system and Bowen ratio systems showed rms differences of 128 watts per square meter. Unlike the Bowen ratio system, the eddy covariance system does not assume energy budget closure. Despite the difference in manufacturers, all systems had similar closure rates of near 80 percent. After forcing closure, rms differences for the comparison between Wisconsin and other eddy covariance latent heat fluxex dropped to 27 watts per square meter, while those between the Wisconsin eddy covariance system and Bowen ratio systems dropped to 99 watts per square meter.

Last Modified: 9/1/2014
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