A comparison of two turbulent dispersion parameterisations in the stable boundary layer using Lagrangian and Eulerian models

A comparison of two turbulent dispersion parameterisations in the stable boundary layer using Lagrangian and Eulerian models

An Eulerian model and a Lagrangian particle model are used to study the dispersion of a contaminant released from a low height source in the Stable Boundary Layer (SBL). The Eulerian model is based on the solution of the advection-diffusion equation by the Laplace transform technique. The Lagrangian...

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Veröffentlicht in:Revista Brasileira de Geofísica 2002-08, Vol.20 (2), p.104-112
Hauptverfasser: Moreira, Davidson Martins, Carvalho, Jonas da Costa, Goulart, Antônio Gledson, Rizza, Umberto, Mangia, Cristina
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container_start_page 104
container_title Revista Brasileira de Geofísica
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creator Moreira, Davidson Martins
Carvalho, Jonas da Costa
Goulart, Antônio Gledson
Rizza, Umberto
Mangia, Cristina
description An Eulerian model and a Lagrangian particle model are used to study the dispersion of a contaminant released from a low height source in the Stable Boundary Layer (SBL). The Eulerian model is based on the solution of the advection-diffusion equation by the Laplace transform technique. The Lagrangian model is based on a generalized form of the Langevin equation. Turbulence inputs are parameterised according to two procedures capable of generating continuous values in all stability conditions and in all heights of Planetary Boundary Layer (PBL). Statistical indices were calculated to compare the predicted and observed values of ground-level concentration. According to the statistical analysis, predicted concentration values agree well with the observed ones.
doi_str_mv 10.1590/S0102-261X2002000200003
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GEOSCIENCES, MULTIDISCIPLINARY
title A comparison of two turbulent dispersion parameterisations in the stable boundary layer using Lagrangian and Eulerian models
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