Stable nocturnal boundary layer: a comparison of one-dimensional and large-eddy simulation models
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.
Bibliographic Reference: Article: Boundary Layer Meteorology (1998)
Record Number: 199810516 / Last updated on: 1998-05-05
Original language: en
Available languages: en