Seasonal analysis of Brown Carbon, Black Carbon and Dust at Central Amazonia with Ångström Matrices
Carregando...
Data
Data de publicação:
2021
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
É parte de
WORKSHOP ON LIDAR MEASUREMENTS IN LATIN AMERICA, 11th
Exportar
Resumo
Aerosol optical properties are an important and direct way to understand and quantify the seasonal
effects of the Amazonian aerosol by means of the intensive optical properties: absorption and scattering
Ångström exponent. AERONET photometers measure the aerosol optical properties and associated with a set of
algorithms, obtain information of the aerosol physical characteristics such as the aerosol optical depth (AOD)
and the absorption aerosol optical depth (AAOD) almost in real time. For the last 22 years, those properties have
been measured at several AERONET sites using CIMEL sun photometers in Amazon. Measurements were done
in Central Amazonia (Manaus and ATTO tower), as well as in the deforestation arc: Rio Branco, Cuiabá,
Ji-Paraná, and Alta Floresta, and results have shown important geographical and seasonal variability in terms of
aerosol impacts. We can access the seasonal Brown Carbon, Black Carbon, and Dust calculating the Ångström
matrix with absorption and scattering Ångström exponent. We observe a clear separation between dry and wet
season, and in the later, also a period in which Dust comes from Saara (mostly between January to April).
Therefore, it was possible to observe Brown Carbon (BrC) in addition to Black Carbon (BC), which is
responsible for 12% of the AAOD of aerosols at 440nm in the deforestation arc in sites that are about 1000 km
apart and show consistency very good. As for pristine sites, such as the ATTO site, the contribution of BrC is
25% in relation to the AAOD at 440nm where we have very little human interference.
Como referenciar
MORAIS, FERNANDO G.; FRANCO, MARCO A.; BARBOSA, HENRIQUE M.J.; JORGE, FABIO; ARTAXO, PAULO; LANDULFO, EDUARDO. Seasonal analysis of Brown Carbon, Black Carbon and Dust at Central Amazonia with Ångström Matrices. 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. 24-24. Disponível em: http://repositorio.ipen.br/handle/123456789/33307. Acesso em: 26 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.