CONTRIBUIÇÃO DE FATORES QUÍMICOS E METEOROLÓGICOS PARA A FORMAÇÃO DE OZÔNIO TROPOSFÉRICO EM SÃO PAULO

Caroline Santolaya; Maria Carla Queiroz Diniz Oliveira; Luciana Varanda Rizzo; Simone Georges El Khouri Miraglia

doi:10.5327/Z2176-947820190577

Authors

Caroline Santolaya UNIFESP, Departamento de Engenharia Química
Maria Carla Queiroz Diniz Oliveira UNIFESP, Departamento de Ciências Ambientais http://orcid.org/0000-0001-8660-9244
Luciana Varanda Rizzo Universidade Federal de São Paulo (UNIFESP) https://orcid.org/0000-0002-1748-6997
Simone Georges El Khouri Miraglia UNIFESP, Departamento de Engenharia Química http://orcid.org/0000-0001-9482-602X

DOI:

https://doi.org/10.5327/Z2176-947820190577

Keywords:

air quality; ozone, meteorological conditions; atmospheric chemistry; São Paulo metropolitan region.

Abstract

Ozone (O₃) is one of the main pollutants that contribute to air quality deterioration in urban areas. It is a secondary pollutant, produced in the atmosphere by photochemical reactions, in a way that its formation depends both on meteorological and chemical factors. This work aims to analyze the interannual variability of O₃ concentrations at the Sao Paulo metropolitan region between 2005 and 2015, isolating the contribution of chemical factors using the Kolmogorov-Zurbenko filter. Results indicate that the variability of meteorological conditions explained from 39 to 52% of O₃ concentration variance during the study period. O₃ concentration peaks in the long-term time series component were mainly associated with chemical factors, associated with changes in the emission pattern of precursors. Years with high O₃ concentrations occurred simultaneously with increases on the gasoline usage relative to ethanol.