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Abstract

A 1-dimensional model and a large-eddy model are used to simulate the turbulence structure of a stably stratified atmospheric boundary layer. The results are compared with those obtained by Andren (1995) using a similar 3-dimensional model and with experimental data. The 1-dimensional model solves the fundamental equations of momentum. entropy and conservation of 2 scalars and a diagnostic second-order closure model is used to determine the turbulent fluxes of the variables as well as the variances of the velocity and scalars. The 2 large-eddy models differ in the definition of the sub-grid scale model. The comparison of the model results outlines the differences and the similarities between the 3-dimensional and the 1-dimensional simulations. Although the results of the 2 large-eddy simulation models differ in the description of some of the stable boundary layer turbulence features, it is shown that good agreement is obtained with the local-similarity theory and experimental data. The differences between the results of 3 models relate to the stratification within the layer, the asymptotic value of the various turbulent variables for large stability regimes and their values close to the surface.

Additional information

Authors: GALMARINI S, JRC Ispra (IT);BEETS C, University of Utrecht, Institute for Marine and Atmospheric Research (NL);DUYNKERKE P G, University of Utrecht, Institute for Marine and Atmospheric Research (NL);VILÀ-GUERAU DE ARELLANO J, Universidad Politecnica de Catalunya, Departimento de Física Aplicada (ES);VILA-GUERAU DE ARELLANO J, Universidad Politecnica de Catalunya, Departimento de Fisica Aplicada (ES)
Bibliographic Reference: Article: Boundary Layer Meteorology (1998)
Record Number: 199810516 / Last updated on: 1998-05-05
Category: PUBLICATION
Original language: en
Available languages: en
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