A Re-examination of Density Effects in Eddy Covariance Measurements of CO_2 Fluxes |
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| Authors: | Heping LIU |
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| Institution: | Heping LIU Department of Physics,Atmospheric Sciences & Geoscience,Jackson State University,P. O. Box 17660,Jackson,MS 39217,USA |
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| Abstract: | Corrections of density effects resulting from air-parcel expansion/compression are important in interpreting eddy covariance fluxes of water vapor and CO2 when open-path systems are used. To account for these effects, mean vertical velocity and perturbation of the density of dry air are two critical parameters in treating those physical processes responsible for density variations. Based on various underlying assumptions, different studies have obtained different formulas for the mean vertical velocity and ... |
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| Keywords: | eddy covariance flux of CO_2 flux correction density effects air-parcel expansion/compression open-path CO_2/H_2O infrared gas analyzer |
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