Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models
Data de publicação2007-08-03
Direito de acesso
MetadadosExibir registro completo
We describe and begin to evaluate a parameterization to include the vertical transport of hot gases and particles emitted from biomass burning in low resolution atmospheric-chemistry transport models. This sub-grid transport mechanism is simulated by embedding a 1-D cloud-resolving model with appropriate lower boundary conditions in each column of the 3-D host model. Through assimilation of remote sensing fire products, we recognize which columns have fires. Using a land use dataset appropriate fire properties are selected. The host model provides the environmental conditions, allowing the plume rise to be simulated explicitly. The derived height of the plume is then used in the source emission field of the host model to determine the effective injection height, releasing the material emitted during the flaming phase at this height. Model results are compared with CO aircraft profiles from an Amazon basin field campaign and with satellite data, showing the huge impact that this mechanism has on model performance. We also show the relative role of each main vertical transport mechanisms, shallow and deep moist convection and the pyro-convection (dry or moist) induced by vegetation fires, on the distribution of biomass burning CO emissions in the troposphere.
Como citar este documento
Este item aparece nas seguintes coleções
Exibindo os itens relacionados pelo título, autor e palavra-chave.
Alves, Daniele Barroca Marra ; Monico, João Francisco Galera ; Dalbelo, Luiz Fernando Antonio (Boletim de Ciências Geodésicas, 2007) [Artigo]Nowadays, with the implantation of GNSS (Global Navigation Satellite System) reference station networks, several positioning techniques have been developed and/or improved. Using such kind of network data it is possible ...
Alves, D. B M ; Monico, J. F G (International Association of Geodesy Symposia, 2007) [Trabalho apresentado em evento]The GPS observables are subject to several errors. Among them, the systematic ones have great impact, because they degrade the accuracy of the accomplished positioning. These errors are those related, mainly, to GPS ...
Mitigating systematic errors for single frequency GPS receivers employing a penalized least squares methodology Alves, Daniele Barroca Marra ; Monico, João Francisco Galera (Navigation, Journal of the Institute of Navigation, 2006) [Artigo]Among the positioning systems that compose GNSS (Global Navigation Satellite System), GPS has the capability of providing low, medium and high precision positioning data. However, GPS observables may be subject to many ...