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Turbulence-Kinetic-Energy Budget in the Urban-Like Boundary Layer Using Large-Eddy Simulation
Springer Science and Business Media LLC - Tập 178 - Trang 201-223 - 2020
Geng Tian, Boris Conan, Isabelle Calmet
We describe and explain the turbulent processes at play in the lower part of the urban boundary layer through performing a large-eddy simulation of the flow over an urban-like canopy composed of a staggered array of cubes with a packing density of 25%. The simulation models neutral thermal conditions at a Reynolds number (based on both velocity at the top of the domain and the domain height) of ...... hiện toàn bộ
Announcement
Springer Science and Business Media LLC - Tập 60 - Trang 205-205 - 1992
The dependence of the measured cool skin of the ocean on wind stress and total heat flux
Springer Science and Business Media LLC - Tập 10 - Trang 465-474 - 1976
Hartmut Grassl
The temperature drop δT between the ocean surface and the 5-cm depth was recorded during GATE, Phase III. With measured values of the total heat flux Q and an assumption about the thickness of the viscous boundary layer of the ocean, the wind-speed dependence of the factor of proportionality between δT and Q is determined. This factor depends on the deviations of the thickness of the conductive la...... hiện toàn bộ
Observations of leaf stomatal conductance at the canopy scale: An atmospheric modeling perspective
Springer Science and Business Media LLC - Tập 64 - Trang 127-148 - 1993
Roni Avissar
Plant stomata play a key role in the redistribution of energy received on vegetated land into sensible and latent heat. As a result, they have a considerable impact on the atmospheric planetary boundary layer, the hydrologic cycle, the climate, and the weather. Current parameterizations of the stomatal mechanism in state-of-the-art atmospheric models are based on empirical relations that are estab...... hiện toàn bộ
The Validity of Similarity Theory in the Roughness Sublayer Above Forests
Springer Science and Business Media LLC - Tập 87 - Trang 69-99 - 1998
I. J. Simpson, G. W. Thurtell, H. H. Neumann, G. Den Hartog, G. C. Edwards
Flux-gradient relationships based upon similarity theory have been reported to severely underestimate scalar fluxes in the roughness sublayer above forests, as compared to independent flux estimates (for example, eddy covariance or energy balance measurements). This paper presents the results of a unique three-month investigation into the validity of similarity theory in the roughness sublayer abo...... hiện toàn bộ
Momentum- and Heat-Flux Parametrization at Dome C, Antarctica: A Sensitivity Study
Springer Science and Business Media LLC - Tập 162 - Trang 341-367 - 2016
Etienne Vignon, Christophe Genthon, Hélène Barral, Charles Amory, Ghislain Picard, Hubert Gallée, Giampietro Casasanta, Stefania Argentini
An extensive meteorological observational dataset at Dome C, East Antarctic Plateau, enabled estimation of the sensitivity of surface momentum and sensible heat fluxes to aerodynamic roughness length and atmospheric stability in this region. Our study reveals that (1) because of the preferential orientation of snow micro-reliefs (sastrugi), the aerodynamic roughness length ...... hiện toàn bộ
Model of Spectral and Directional Radiative Transfer in Complex Urban Canopies with Participating Atmospheres
Springer Science and Business Media LLC - - 2023
Cyril Caliot, Robert Schoetter, Vincent Forest, Vincent Eymet, Tin-Yuet Chung
A comparison of wind speed shears for frontal and undisturbed synoptic conditions
Springer Science and Business Media LLC - Tập 28 - Trang 329-342 - 1984
Ching-Ming Sheih
Wind speed shear parameters derived from data collected at a 481-m TV tower are computed for disturbed conditions (cold frontal passage), all undisturbed winds, undisturbed high winds, and undisturbed low winds. The exponential values of the wind speed power law for the case of disturbed conditions are found to be smaller than those for the case of all undisturbed winds, for practically all atmosp...... hiện toàn bộ
Numerical experimentation with particles having non-zero terminal velocity in the atmospheric surface layer
Springer Science and Business Media LLC - Tập 9 - Trang 191-204 - 1975
Jack H. Shreffler
Numerical solutions are obtained for a two-dimensional eddy diffusion equation describing aerosol particles in the atmospheric surface layer. Particles are assumed to be from either an elevated line source or a surface area source. Characteristics of the solutions are exhibited as a function of source type, lower boundary condition, and the ratio of terminal velocity (Ω) to friction velocity (u *)...... hiện toàn bộ
Preface: GEWEX Atmospheric Boundary-layer Study (GABLS) on Stable Boundary Layers
Springer Science and Business Media LLC - Tập 118 - Trang 243-246 - 2006
Bert Holtslag
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