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Hybrid Methods in Engineering

ISSN Druckformat: 1099-2391
ISSN Online: 2641-7359

Archives: Volume 1, 1999 to Volume 4, 2002

Hybrid Methods in Engineering

DOI: 10.1615/HybMethEng.v2.i3.70
14 pages

MODELING THE CONVECTIVE TRANSPORT OF TRACE GASES BY DEEP AND MOIST CONVECTION

S. R. Freitas
Departamento de Ciencias Atmosfericas—University of Sao Paulo, Rua do Matao 1226, 05508-900 Sao Paulo, Brazil
M. A. F. Silva Dias
Departamento de Ciencias Atmosfericas—University of Sao Paulo, Rua do Matao 1226, 05508-900 Sao Paulo, Brazil
P. L. Silva Dias
Departamento de Ciencias Atmosfericas—University of Sao Paulo, Rua do Matao 1226, 05508-900 Sao Paulo, Brazil

ABSTRAKT

This article presents a parameterization of subgrid-scale convective transport of trace gases and particles associated with deep and moist convection systems for low-resolution atmospheric models. The parameterization is based on the "top-hat" method and has been coupled to the cumulus parameterization scheme of the RAMS-CSU model. It has been used for long-range transport studies of emissions associated with biomass burning over South America. Theoretical and numerical approaches are presented, and a simple conservative and positive definite scheme numerical is introduced. A case study of vertical and deep transport of smoke associated with the approach of a mid-latitude front in southern Brazil is also presented, depicting the main processes responsible for the transfer of biomass burning emissions from the planetary boundary layer to the upper troposphere.


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