New Equations For Sonic Temperature Variance And Buoyancy Heat Flux With An Omnidirectional Sonic Anemometer |
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| Authors: | Heping Liu Gerhard Peters Thomas Foken |
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| Institution: | (1) Department of Geophysics, Peking University, Beijing, 100871, P. R. China;(2) Institute of Meteorology, University of Hamburg, D-20146 Hamburg, Germany |
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| Abstract: | Many new types of sonic anemometer obtain sonic temperature from an average value of temperature measured along three paths, unlike previous sonic anemometers that generally used one path. New equations are derived to calculate temperature variance from sonic temperature variance and sensible heat flux from buoyancy flux considering the influence of a crosswind. These equations can be applied to CSAT3, Solent R2, R3, R3A, HS, and USA-1 sonic anemometers with the corresponding correction factors given in this paper. The equations are verified by data measured by a CSAT3 sonic anemometer in the LITFASS-1998 field study. |
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| Keywords: | Buoyancy flux Eddy covariance Sensible heat flux Sonic anemometer Sonic temperature Sonic temperature variance |
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