Sweeping Effects Modify Taylor’s Frozen Turbulence Hypothesis for Scalars in the Roughness Sublayer

Authors

K. A. Everard, The University of British Columbia
G. G. Katul, Duke University
G. A. Lawrence, The University of British Columbia
A. Christen, Universität Freiburg
M. B. Parlange, University of Rhode Island

Document Type

Article

Date of Original Version

11-28-2021

Abstract

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.

Publication Title, e.g., Journal

Geophysical Research Letters

Volume

48

Issue

22

Citation/Publisher Attribution

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.