Journal ArticleDOI
Sensible Heat Flux Estimated from Routine Meteorological Data by the Resistance Method
R. Berkowicz,L. P. Prahm +1 more
TLDR
In this article, a model for surface resistance for evaporation is presented, which is related to net radiation and to accumulated net radiation since last precipitation, which determines the degree of dryness of the soil.Abstract:
A method is described for evaluation of hourly values of the sensible heat flux from routine meteorological data. Use is made of the energy balance at the surface and of the Monteith-Penman formula for estimation of the latent heat flux. The soil heat flux is modelled as a given fraction of the sensible heat flux. The net radiation is computed from the information on cloudiness and solar elevation. A model for surface resistance for evaporation is presented. It is shown that the surface resistance correlates well with the atmospheric humidity deficit. Furthermore, the surface resistance is related to net radiation and to accumulated net radiation since last precipitation. The accumulated net radiation determines the degree of dryness of the soil. The model results of surface resistance and sensible heat flux are compared with experimental data from three sites: Hobakkegaard, Denmark; Marsta, Sweden; and Cabauw, Holland. The comparison is satisfactory and encourages the use of the method for routi...read more
Citations
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Journal ArticleDOI
A Simple Scheme for Daytime Estimates of the Surface Fluxes from Routine Weather Data
TL;DR: In this article, a simple empirical scheme is presented, which gives hourly estimates of the surface fluxes of heat and momentum from routine weather data during daytime, but it is designed for grass surfaces, and it contains parameters which take account of surface properties in general.
Journal ArticleDOI
Evaluation of the profile method for estimation of surface fluxes of momentum and heat
R. Berkowicz,L.P. Prahm +1 more
TL;DR: In this paper, the authors discuss the procedure most commonly used until now which is based on derivation of turbulent fluxes from wind and temperature profiles in the atmospheric surface layer, and evaluate this method on the basis of available data from several extensive surface layer experiments.
Book ChapterDOI
The Danish Gaussian Air Pollution Model (Oml): Description, Test and Sensitivity Analysis in View of Regulatory Applications
TL;DR: Weil and Brower as mentioned in this paper showed that significant improvement can be obtained, even with a model of the Gaussian type, using a physically more well-founded parameterization of dispersion.
Journal ArticleDOI
Updating Applied Diffusion Models
TL;DR: In a recent workshop, the American Meteorological Society organized a workshop to help improve the basis of such models, their physics and hopefully their performance as mentioned in this paper, which resulted from a clear understanding of the vertical structure and diffusion in the convective boundary layer, as demonstrated by laboratory experiments, numerical simulations, and field observations.
Book ChapterDOI
Dispersion in the Convective Boundary Layer
TL;DR: In this paper, the authors focus on point sources of non-buoyant (i.e., passive) or buoyant material at arbitrary height in the planetary boundary layer (CBL) and discuss how this improved the theoretical basis and performance of dispersion models for routine applications.
References
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Journal ArticleDOI
Natural evaporation from open water, bare soil and grass
TL;DR: It is shown that a satisfactory account can be given of open water evaporation at four widely spaced sites in America and Europe, the results for bare soil receive a reasonable check in India, and application of theresults for turf shows good agreement with estimates of evapolation from catchment areas in the British Isles.
Journal ArticleDOI
On the Assessment of Surface Heat Flux and Evaporation Using Large-Scale Parameters
C. H. B. Priestley,R. J. Taylor +1 more
TL;DR: In this article, the large-scale parameterization of the surface fluxes of sensible and latent heat is properly expressed in terms of energetic considerations over land while formulas of the bulk aerodynamic type are most suitahle over the sea.
Journal ArticleDOI
Principles of Environmental Physics
TL;DR: In this paper, the second edition of the Second edition, the authors present a list of symbolic symbols for the field of environmental physical sciences, including the following: 1.GAS LAWS Pressure, volume and temperature Specific heats Lapse rate Water and water vapour Other gases 3. TRANSPORT LAWS General transfer equation Molecular transfer processes Diffusion coefficients Radiation laws 4. RADI ENVIRONMENT Solar radiation Terrestrial radiation Net radiation 5. MICROCLIMATOLOGY OF RADIATION (i) Interception Direct solar radiation Diffuse radiation Radiation in
Journal ArticleDOI
Flux-Profile Relationships in the Atmospheric Surface Layer
TL;DR: In this article, the free constants in several interpolation formulas can be adjusted to give excellent fits to the wind and temperature gradient data, and the behavior of the gradients under neutral conditions is unusual, however, and indicates that von Karman's constant is ∼0.35, rather than 0.40 as usually assumed, and that the ratio of eddy diffusivities for heat and momentum at neutrality is ∼1.0.
Book
Evaporation into the atmosphere
TL;DR: In this paper, the authors describe the process of evaporation into the atmosphere and its effect on the environment. But they do not discuss its application in the field of meteorology.
Related Papers (5)
A Simple Scheme for Daytime Estimates of the Surface Fluxes from Routine Weather Data
Evaluation of the profile method for estimation of surface fluxes of momentum and heat
R. Berkowicz,L.P. Prahm +1 more