Abstract
This Chapter re-examines theory developed by Webb, Pearman and Leuning (1980, Quarterly Journal of the Royal Meteorological Society, 106, 85–100) to calculate fluxes of trace gas constituents in the atmosphere using the eddy covariance technique. The original theory for one-dimensional flow over homogeneous terrain is extended to three-dimensional flow over inhomogeneous terrain. The equations are relatively simple when concentrations are expressed as mixing ratios per unit of dry air. Advective mass fluxes are written as products of fluxes ofdry air and gradients in mixing ratio, while turbulent eddy fluxes requires the covariance of wind speeds and mixing ratios. Theory developed by WPL for one dimensional flows is applicable for the vertical eddy flux.
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Leuning, R. (2004). Measurements of Trace Gas Fluxes in the Atmosphere Using Eddy Covariance: WPL Corrections Revisited. In: Lee, X., Massman, W., Law, B. (eds) Handbook of Micrometeorology. Atmospheric and Oceanographic Sciences Library, vol 29. Springer, Dordrecht. https://doi.org/10.1007/1-4020-2265-4_6
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DOI: https://doi.org/10.1007/1-4020-2265-4_6
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