Analyzing the influence of the planetary boundary layer height, ventilation coefficient, thermal inversions, and aerosol optical Depth on the concentration of PM _2.5 in the city of Sao Paulo: A long-term study

Autor(es)

Moreira, Gregori de Arruda ; Marques, Marcia Talita Amorim ; Lopes, Fabio Juliano da Silva ; Andrade, Maria de Fatima ; Landulfo, Eduardo

• Tipo de documento: Artigo Científico
• Fonte: ATMOSPHERIC POLLUTION RESEARCH; v. 15, n. 8, p. 12-pg., 2024-05-17.

Resumo

Cases of intense air pollution have been a recurring problem in most of urban centers in different regions of the world. Although actions to mitigate pollutant emissions are fundamental, it is also necessary to understand which factors can favor their dispersion process. In this scenario, this paper presents, for the first time, a long-term analysis of the Planetary Boundary Layer Height (PBLH), PBLH ), estimated through lidar and radiosounding data, Ventilation Coefficient (VC), VC ), Thermal Inversions (TI), TI ), and Aerosol Optical Depth (AOD), AOD ), for the city of Sao o Paulo, demonstrating how these variables are related with PM 2 . 5 concentration. The analyzes showed that PBLH and VC have a seasonal cycle, with higher values in summer and lower ones in winter. Furthermore, PBLH is affected by one local factor, the sea-breeze, which reduces the concentration of aerosols in the late afternoon, resulting in an underestimated PBLH obtained from lidar data. Furthermore, from AERONET data, a predominance of Black Carbon and small particles was observed in all seasons, which are associated with the feedback effect observed in winter. Such effect attenuates the increase of PBLH and VC in cases of high concentrations of PM 2 . 5 . Finally, it was presented a Generalized Linear Model, which combines VC , AOD and TI information as input and can estimate the PM 2 . 5 concentration with a R2 2 = 0.93. (AU)

• Processo FAPESP: 16/18438-0 - Área Metropolitana de São Paulo: abordagem integrada mudanças climáticas e qualidade do ar, METROCLIMA MASP
• Beneficiário: Maria de Fátima Andrade
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 19/17304-9 - Sistema de gerenciamento de dados, plataforma de integração e visualização rápida
• Beneficiário: Márcia Talita Amorim Marques
• Modalidade de apoio: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico