Measurement of greenhouses gases in the city of Sao Paulo
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2021
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WORKSHOP ON LIDAR MEASUREMENTS IN LATIN AMERICA, 11th
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The gases that most contribute to the greenhouse effect are carbon dioxide (CO2), methane
(CH4) and nitrous oxide (N2O). When those gases have been in the atmosphere for a long time, its effects
become almost irreversible with the radiative forcing of years, until natural processes manage to remove the
quantities already emitted. Methane is a radiative agent and happens significantly in the southern hemisphere.
Methane is a major source of water vapor. When the concentration of water vapor in the stratosphere
increases, it contributes to intensifying the greenhouse effect. The large part of carbon dioxide and methane
absorbed by the ocean, atmosphere and biosphere, contributes to the global carbon cycle, bringing a stable
carbon rate in the air. Forest fires are often responsible for releasing carbon dioxide and methane. It is important
to consider the role of photosynthesis in the balance between anthropogenic process, climate change and air
quality. Therefore, forest preservation and reforestation projects are fundamental against climate change.
The main purpose of Metroclima Project is to assess the sources of greenhouse gases and short-lived
pollutants in Sao Paulo and neighboring cities, in the Southeast of Brazil. Currently, the GHG measurement
network has four stations (IAG Station, Pico do Jaragua, UNICID and ICESP) extended across the City of Sao
Paulo, measuring carbon dioxide and methane concentrations continuously using Cavity Ring Down
Spectroscopy (CRDS) instruments.
In specific, the goal of this study is related to assessment of methane concentration variability and
identification of potential sources near UNICID Station – an urban site; using the CRDS Picarro G2401 system.
The data analysis acquired during 2020 and 2021 will be shown. Our results comprise a valuable contribution to
the knowledge about methane concentrations in the city and guide public decision based on scientific evidence.
Como referenciar
SILVA, THAIS A. da; OLIVEIRA, CARLOS E.S. de; CRUZ, DANILO D.; MEDEIROS, ILCA M.M.A.; MEDEIROS, JOSE A.G. de; OLIVEIRA, LUCAS P.; MARQUES, MARCIA T.A.; MEDEIROS, PEDRO A.; ANDRADE, MARIA F.; LANDULFO, EDUARDO. Measurement of greenhouses gases in the city of Sao Paulo: assessing methane concentrations and sources. In: WORKSHOP ON LIDAR MEASUREMENTS IN LATIN AMERICA, 11th, October 19-22, 2021, Punta Arenas, Chile. Abstract... Punta Arenas, Chile: Universidad de Magallanes, 2021. p. 48-48. Disponível em: http://repositorio.ipen.br/handle/123456789/33310. Acesso em: 19 Apr 2024.
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.