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Modelling of atmospheric aerosol properties in the São Paulo Metropolitan Area: impact of biomass burning

Vara-Vela, Angel, de Fátima Andrade, Maria, Zhang, Yang, Kumar, Prashant, Ynoue, Rita Yuri, Souto-Oliveira, Carlos Eduardo, da Silva Lopes, Fábio Juliano and Landulfo, Eduardo (2018) Modelling of atmospheric aerosol properties in the São Paulo Metropolitan Area: impact of biomass burning Journal of Geophysical Research: Atmospheres, 123 (17). pp. 9935-9956.

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Abstract

Smoke particles ejected into the atmosphere from biomass burning can modify the atmospheric composition around and even 30 far from the sources. In late winter and early spring, biomass burning emissions from inland regions can be efficiently 31 transported to urban areas in south-eastern South America, thus affecting air quality in those areas. In this study, the Weather 32 Research and Forecasting with Chemistry (WRF-Chem) model was applied in order to investigate the impact of biomass 33 burning sources on aerosol loadings and properties over the São Paulo Metropolitan Area (SPMA), in south-eastern Brazil, 34 during the period from 19 August to 3 September 2014. The model performance was evaluated using available aerosol 35 measurements from the Narrowing the Uncertainties on Aerosol and Climate Change in São Paulo State (NUANCE-SPS) 36 project. The combined application of aerosol data and WRF-Chem simulations made it possible to represent some of the most 37 important aerosol properties, such as particle number concentration (PNC) and cloud condensation nuclei (CCN) activation, in 38 addition to evaluation of the impact of biomass burning by analysing a five-day transport event, from 22 August to 26 August 39 2014. During this transport event, differences in the average predicted PM2.5 concentration reached 15 μg m−3 (peaking at 20 40 μg m−3 during the night-time hours) over the SPMA, compared with 35 μg m−3 over inland areas northwest and north of the 41 SPMA. Biomass burning accounted for up to 20 % of the baseline PNC- and CCN-weighted relative differences over the 42 SPMA (2300 cm−3 and 1400 cm−3, respectively).

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
NameEmailORCID
Vara-Vela, Angel
de Fátima Andrade, Maria
Zhang, Yang
Kumar, PrashantP.Kumar@surrey.ac.uk
Ynoue, Rita Yuri
Souto-Oliveira, Carlos Eduardo
da Silva Lopes, Fábio Juliano
Landulfo, Eduardo
Date : 24 August 2018
DOI : 10.1029/2018JD028768
Copyright Disclaimer : An edited version of this paper was published by AGU. Copyright 2018 American Geophysical Union. ,
Related URLs :
Depositing User : Clive Harris
Date Deposited : 13 Aug 2018 14:06
Last Modified : 02 Oct 2018 17:09
URI: http://epubs.surrey.ac.uk/id/eprint/848908

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