GMD Geoscientific Model Development GMD Geosci. Model Dev. 1991-9603 Copernicus Publications Göttingen, Germany 10.5194/gmd-6-1389-2013 The Chemistry CATT-BRAMS model (CCATT-BRAMS 4.5): a regional atmospheric model system for integrated air quality and weather forecasting and research Longo K. M. 1 Freitas S. R. https://orcid.org/0000-0002-9879-646X 1 Pirre M. 2 Marécal V. https://orcid.org/0000-0003-1077-909X 3 Rodrigues L. F. 1 Panetta J. 4 Alonso M. F. 5 Rosário N. E. 6 Moreira D. S. 1 Gácita M. S. https://orcid.org/0000-0002-9414-3146 1 Arteta J. 3 Fonseca R. 1 Stockler R. 1 Katsurayama D. M. 1 Fazenda A. https://orcid.org/0000-0002-4052-1113 7 Bela M. 8 Centro de Previsão de Tempo e Estudos Climáticos, INPE, Cachoeira Paulista, Brazil Laboratoire de Physique et Chimie de l'Environnement et de l'Espace, CNRS-Université d'Orléans, Orléans, UMR7328, France Centre National de Recherches Météorologique/Groupe d'étude de l'Atmosphère Météorologique, Météo-France and CNRS, UMR3589, Toulouse, France Divisão de Ciências da Computação, Instituto Tecnológico da Aeronáutica (ITA), São José dos Campos, Brazil Faculdade de Meteorologia, Universidade Federal de Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil Departamento de Ciências Biológicas, Universidade Federal de São Paulo (UNIFESP), Diadema, São Paulo, Brazil Instituto de Ciência e Tecnologia, Universidade Federal de São Paulo (UNIFESP), São José dos Campos, São Paulo, Brazil Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, USA 09 09 2013 6 5 1389 1405 Copyright: © 2013 K. M. Longo et al. 2013 This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/ This article is available from https://gmd.copernicus.org/articles/6/1389/2013/gmd-6-1389-2013.html The full text article is available as a PDF file from https://gmd.copernicus.org/articles/6/1389/2013/gmd-6-1389-2013.pdf

Coupled Chemistry Aerosol-Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System (CCATT-BRAMS, version 4.5) is an on-line regional chemical transport model designed for local and regional studies of atmospheric chemistry from the surface to the lower stratosphere suitable both for operational and research purposes. It includes gaseous/aqueous chemistry, photochemistry, scavenging and dry deposition. The CCATT-BRAMS model takes advantage of BRAMS-specific development for the tropics/subtropics as well as the recent availability of preprocessing tools for chemical mechanisms and fast codes for photolysis rates. BRAMS includes state-of-the-art physical parameterizations and dynamic formulations to simulate atmospheric circulations down to the meter. This on-line coupling of meteorology and chemistry allows the system to be used for simultaneous weather and chemical composition forecasts as well as potential feedback between the two. The entire system is made of three preprocessing software tools for user-defined chemical mechanisms, aerosol and trace gas emissions fields and the interpolation of initial and boundary conditions for meteorology and chemistry. In this paper, the model description is provided along with the evaluations performed by using observational data obtained from ground-based stations, instruments aboard aircrafts and retrieval from space remote sensing. The evaluation accounts for model applications at different scales from megacities and the Amazon Basin up to the intercontinental region of the Southern Hemisphere.

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