Results 231 to 240 of about 16,702 (269)

SURFACE ATMOSPHERIC HEAT-FLUX ANALYSIS ON THE LETTAU MODEL

Journal of Meteorology, 1953
Abstract Determinations of the turbulent flux of heat at the earth's surface are made for the period 24–25 January 1950 at Manor, Texas, with use of mean vertical gradients of air temperature and wind speed, following the Lettau model of non-isotropic turbulence.
K. H. Jehn, J. R. Gerhardt
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Modelling of turbulent fluxes in water surface ecosystems studies

Mathematics and Computers in Simulation, 1982
Abstract The study of aquatic ecosystems has taken advantage of the development of mathematical models considered as tools applied for comprehension, simulation and prediction. But their final adjustment is connected with modelling of turbulent fluxes which interprets the mixing of various components and of biochemical kinetics.
B. Caussade, C. Chaussavoine, L. Masbernat   +2 more
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On comparison of modeled surface flux variations to aircraft observations

Agricultural and Forest Meteorology, 2003
Evaluation of models of air–surface exchange is facilitated by an accurate match of areas simulated with those seen by micrometeorological flux measurements. Here, spatial variations in fluxes estimated with the parameterized subgrid-scale surface (PASS) flux model were compared to flux variations seen aboard aircraft above the Walnut River Watershed ...
Jie Song, M.L Wesely
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The parametrization of surface fluxes in large-scale models under free convection

Quarterly Journal of the Royal Meteorological Society, 1995
AbstractThis paper investigates the idea of formulating free convection in large‐scale models as a special case of forced convection. In free convection, the wind speed in the surface transfer law is related to the velocity of the large eddies in the mixed layer and is proportional to the convection velocity scale.
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Flux Parameterization over Land Surfaces for Atmospheric Models

Journal of Applied Meteorology, 1991
Abstract In this paper a summary is given of observations and modeling efforts on surface fluxes, carried out at Cabauw in The Netherlands and during MESOGERS-84 in the south of France. Emphasis is put on those aspects that are important from a modeling point of view, e.g., surface roughness lengths for momentum and heat, stomatal resistance for ...
A. C. M. Beljaars, A. A. M. Holtslag
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Mathematical Modeling of Surface Heat Flux During Quenching

Metallurgical and Materials Transactions B, 2009
In this article, a method to model the heat flux during quenching has been developed to bring out the effect of initial soaking temperature. Quench probes with a diameter of 20 mm and a length of 50 mm were prepared from 304 L stainless steel. These probes were quenched from different initial soaking temperatures ranging from 400 °C to 950 °C in water.
K. Babu, T.S. Prasanna Kumar
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A model for the net total radiation flux at the surfaces of a building

Building and Environment, 1981
Abstract A model is presented for the net total radiation flux at the surfaces of a particular building (in the shape of a U) which can be adjusted to other building shapes. The first step in deriving this model consists in the calculation of the various shape factors under which each surface sees the adjacent surfaces or the sky.
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Single- and Dual-Source Modeling of Surface Energy Fluxes with Radiometric Surface Temperature

Journal of Applied Meteorology, 1996
Abstract Single- and dual-source models of the surface energy transfer across the soil-vegetation-atmosphere interface were used in conjunction with remotely sensed surface temperature for computing the surface energy balance over heterogeneous surfaces.
W. P. Kustas, K. S. Humes, J. M. Norman, M. S. Moran   +3 more
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Sensitivity of modelled Antarctic climate to surface and boundary-layer flux parametrizations

Quarterly Journal of the Royal Meteorological Society, 2001
AbstractThe Hadley Centre climate model version HadAM2 is used to study the sensitivity of modelled Antarctic climate to the parametrization of surface and boundary‐layer heat fluxes under stable conditions. Specifically, the impact of changing the dependence of surface exchange coefficients and eddy diffusivities on the Richardson number is ...
King, J.C., Connolley, W.M., Derbyshire, S.H.   +2 more
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Attribution of trends in modeled and observed surface water fluxes

Evaporation and runoff are the major surface water fluxes. Together they determine water availability on land, which ecosystems and humans rely on. The mechanisms driving trends in evaporation and runoff in the context of global change are not fully understood, which is also reflected in a significant uncertainty of projections of these water fluxes ...
Josephin Kroll, Ruth Stephan, Melissa Ruiz-Vásquez, Rene Orth   +3 more
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