Pollutant levels in São Paulo’s Metropolitan Region and the SARS-CoV-2 pandemic
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2024
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WORKSHOP ON LIDAR MEASUREMENTS IN LATIN AMERICA, 12th
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In this work, we demonstrate how the variation in vehicular traffic due to the SARS-CoV-2 pandemic
and the resumption of activities affected the concentrations of some pollutants (CO, NO2, PM2.5,
andvPM10) in the Metropolitan Region of São Paulo. For this purpose, we estimate the convective
boundary layer (CBL) height from lidar measurements and radiosonde retrievals and calculate the
ventilation coefficient, an essential parameter to evaluate the air pollutants’ dispersion level. In addition,
it was observed the variation of some meteorological variables (air surface temperature, humidity, and
rainfall rate) to identify the occurrence of conditions that can favor pollutant dispersion. Finally, based
on the time series of the pollutants previously mentioned, we created an Artificial Neural Network
(ANN) to identify what will be the concentration of thesepollutants in normal conditions (no pandemic
period). The results demonstrated that during the pandemic period, there was no significant change in
the meteorological variables studied. However, there was a significant reduction in the concentration
of pollutants whose main source is vehicular traffic (CO and NO2) and a significant increase with the
resumption of activities, with the pre-pandemic level having already been reached within a few weeks.
The findings here shown indicate that integrating remote sensing tools, surface data, and artificial
intelligence techniques significantly enhances understanding of pollutant dynamics. Properly trained
ANN algorithms offer the potential for applying this methodology in other regions.
Como referenciar
MOREIRA, GREGORI de A.; CACHEFFO, ALEXANDRE; ANDRADE, IZABEL da S.; LOPES, FABIO J. da S.; GOMES, ANTONIO A.; LANDULFO, EDUARDO. Pollutant levels in São Paulo’s Metropolitan Region and the SARS-CoV-2 pandemic: integrating remote sensing and surface data with artificial neural networks approaches. In: BARJA, BORIS (ed.); LANDULFO, EDUARDO (ed.); LOPES, FABIO J. da S. (ed.). In: WORKSHOP ON LIDAR MEASUREMENTS IN LATIN AMERICA, 12th, April 7-12, 2024, São Paulo, SP. Abstract... p. 69-69. Disponível em: https://repositorio.ipen.br/handle/123456789/48897. Acesso em: 17 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.