CONTRIBUTION OF CHEMICAL AND METEOROLOGICAL FACTORS TO TROPOSPHERIC OZONE FORMATION IN SAO PAULO

• Autor(a) principal: Santolaya, Caroline
• Data de Publicação: 2019
• Outros Autores: Oliveira, Maria Carla Queiroz Diniz, Rizzo, Luciana Varanda, Miraglia, Simone Georges El Khouri
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Brasileira de Ciências Ambientais (Online)
• Texto Completo: https://www.rbciamb.com.br/Publicacoes_RBCIAMB/article/view/577
• topic: air quality; ozone; meteorological conditions; atmospheric chemistry; Sao Paulo metropolitan region; air quality; ozone, meteorological conditions; atmospheric chemistry; São Paulo metropolitan region.

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.