Abstract: The partitioning of turbulent perturbations into a ?low-dimensional? active part responsible for much of the turbulent energy and fluxes and a ?high-dimensional? passive part that contributes little to turbulent energy and ...

Abstract: Orthonormal wavelet expansions were derived and applied to atmospheric surface-layer turbulence measurements of temperature and vapor concentration under unstable and stable atmospheric stability conditions. These expansions ...

Abstract: Triaxial sonic anemometer velocity measurements vertically arrayed at six levels within and above a pine forest were used to examine the performance of two second-order closure models put forth by Wilson and Shaw and by ...

Abstract: The linkages between soil moisture dynamics and convection triggers, defined here as the first crossing between the boundary layer height (hBL) and lifting condensation level (hLCL), are complicated by a large number of ...

Abstract: wo recently proposed turbulence closure schemes are compared against the conventional Mellor?Yamada (MY) model for stably stratified atmospheric flows. The Energy- and Flux-Budget (EFB) approach solves the budgets of ...

Abstract: ospectral budgets are used to link the kinetic and potential energy distributions of turbulent eddies, as measured by their spectra, to macroscopic relations between the turbulent Prandtl number (Prt) and atmospheric ...

Abstract: spectral budget model is developed to describe the scaling behavior of the longitudinal turbulent velocity variance with the stability parameter and the normalized height in an idealized stably stratified atmospheric surface ...

Abstract: Turbulent velocity, temperature, water vapor concentration, and other scalars were measured at the canopy?atmosphere interface of a 13?14-m-tall uniform pine forest and a 33-m-tall nonuniform hardwood forest. These ...

Abstract: The conditional sampling flux measurement technique was evaluated for four scalars (temperature, water vapor, ozone, and carbon dioxide) by comparison with direct eddy correlation measurements at two sites. The empirical ...

Abstract: AbstractThe low-wavenumber regime of the spectrum of turbulence commensurate with Townsend?s ?attached? eddies is investigated here for the near-neutral atmospheric surface layer (ASL) and the roughness sublayer (RSL) above ...