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Top-down vehicle emission inventory for spatial distribution and dispersion modeling of particulate matter

  • Urban Air Quality, Climate and Pollution: From Measurement to Modeling Applications
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Abstract

Emission inventories are one of the most critical inputs for the successful modeling of air quality. The performance of the modeling results is directly affected by the quality of atmospheric emission inventories. Consequently, the development of representative inventories is always required. Due to the lack of regional inventories in Brazil, this study aimed to investigate the use of the particulate matter (PM) emission estimation from the Brazilian top-down vehicle emission inventory (VEI) of 2012 for air quality modeling. Here, we focus on road vehicles since they are usually responsible for significant emissions of PM in urban areas. The total Brazilian emission of PM (63,000 t year−1) from vehicular sources was distributed into the urban areas of 5557 municipalities, with 1-km2 grid spacing, considering two approaches: (i) population and (ii) fleet of each city. A comparison with some local inventories is discussed. The inventory was compiled in the PREP-CHEM-SRC processor tool. One-month modeling (August 2015) was performed with WRF-Chem for the four metropolitan areas of Brazilian Southeast: Belo Horizonte (MABH), Great Vitória (MAGV), Rio de Janeiro (MARJ), and São Paulo (MASP). In addition, modeling with the Emission Database for Global Atmospheric Research (EDGAR) inventory was carried out to compare the results. Overall, EDGAR inventory obtained higher PM emissions than the VEI segregated by population and fleet, which is expected owing to considerations of additional sources of emission (e.g., industrial and residential). This higher emission of EDGAR resulted in higher PM10 and PM2.5 concentrations, overestimating the observations in MASP, while the proposed inventory well represented the ambient concentrations, obtaining better statistics indices. For the other three metropolitan areas, both EDGAR and the VEI inventories obtained consistent results. Therefore, the present work endorses the fact that vehicles are responsible for the more substantial contribution to PM emissions in the studied urban areas. Furthermore, the use of VEI can be representative for modeling air quality in the future.

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Acknowledgments

We acknowledge the following: mozbc WRF-Chem preprocessor tool provided by the Atmospheric Chemistry Observations and Modeling Lab (ACOM) of NCAR, and MOZART-4 global model output available at http://www.acom.ucar.edu/wrf-chem/mozart.shtml.

Funding

This research was partially funded by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) - Finance Code 001, Brazil. Prashant Kumar acknowledges the support received through the Research England funding under the Global Challenge Research Fund (GCRF) program for the project CArE-Cities: Clean Air Engineering for Cities. The Grupo de Pesquisa em Poluição do Ar e Meteorologia Aplicada (GPAMA) acknowledges ArcelorMittal for partial financial support.

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Correspondence to Taciana Toledo de Almeida Albuquerque.

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Responsible Editor: Marcus Schulz

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Andreão, W.L., Alonso, M.F., Kumar, P. et al. Top-down vehicle emission inventory for spatial distribution and dispersion modeling of particulate matter. Environ Sci Pollut Res 27, 35952–35970 (2020). https://doi.org/10.1007/s11356-020-08476-y

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  • DOI: https://doi.org/10.1007/s11356-020-08476-y

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