Sweeping Effects Modify Taylor’s Frozen Turbulence Hypothesis for Scalars in the Roughness Sublayer
Date of Original Version
Taylor’s frozen turbulence hypothesis (FTH) is investigated in the roughness sublayer of a sloped vineyard canopy using a spatial array of fine-wire thermocouples and ultrasonic anemometers. The Ellipse Approximation (EA) method is applied to the measured space-time temperature correlation function to delineate sweeping effects from advection velocity. Sweeping effects are explained primarily by the turbulence kinetic energy. Upon the removal of sweeping effects, the advection velocity is found to be commensurate with the mean velocity.
Geophysical Research Letters
Everard, K. A., G. G. Katul, G. A. Lawrence, A. Christen, and M. B. Parlange. "Sweeping Effects Modify Taylor’s Frozen Turbulence Hypothesis for Scalars in the Roughness Sublayer." Geophysical Research Letters 48, 22 (2021). doi:10.1029/2021GL093746.