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Large-eddy Simulations of Surface Roughness Parameter Sensitivity to Canopy-structure Characteristics by K. D. Maurer; G. Bohrer; W. T. Kenny; V. Y. Ivanov is a Environmental Science article available to read on EtoBox.

What is Large-eddy Simulations of Surface Roughness Parameter Sensitivity to Canopy-structure Characteristics about?

Abstract. Surface roughness parameters, namely the roughness length and displacement height, are an integral input used to model surface fluxes. However, most models assume these parameters to be a fixed property of plant functional type and disregard the governing structural heterogeneity and dynamics. In this study, we use large-eddy simulations to explore, in silico, the effects of canopy-structure characteristics on surface roughness parameters. We performed a virtual experiment to test the sensitivity of resolved surface roughness to four axes of canopy structure: (1) leaf area index, (2) the vertical profile of leaf density, (3) canopy height, and (4) canopy gap fraction. We found roughness parameters to be highly variable, but uncovered positive relationships between displacement height and maximum canopy height, aerodynamic canopy height and maximum canopy height and leaf area index, and eddy-penetration depth and gap fraction. We also found negative relationships between aerodynamic canopy height and gap fraction, as well as between eddy-penetration depth and maximum canopy height and leaf area index. We generalized our model results into a virtual "biometric" parameteriza

Who reads Large-eddy Simulations of Surface Roughness Parameter Sensitivity to Canopy-structure Characteristics?

Author

K. D. Maurer; G. Bohrer; W. T. Kenny; V. Y. Ivanov

Publisher

Copernicus GmbH; Göttingen: Copernicus Publ. (ISSN 1726-4189)

Published

2015

Language

EN

Field

Environmental Science (Physical Sciences)