Long term analysis of optical and radiative properties of aerosols in the Amazon Basin
Carregando...
Data
Data de publicação
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Aerosol and Air Quality Research
Exportar
Resumo
The Amazon region is an excellent laboratory for analysis of natural aerosols in the wet season; however, in the dry season
the biomass burning emissions highly influence it, which considerably alters the physical and chemical properties of the
atmosphere. We analyzed long-term time series (2000–2017) of optical and radiative properties of aerosols during dry and
rain seasons from nine AERONET stations located in the Amazon Basin (Western Brazil). Aerosols have been classified
into two groups: organic carbon (OC) and elemental carbon (EC), which allowed quantification of their effects on the
radiative forcing for these sites. It was possible to conclude that the optical depth values of aerosols (AOD 500 nm), which
remained in a downward inclination beginning in 2010 to 2012, returned to rise since 2013. The analysis showed that the
fraction of biogenic particles varied from approximately 38% to 67% at the site of Manaus EMBRAPA. However, for ATTO
this fraction remained practically constant throughout the year, around 68% as the fraction of OC-EC went from
approximately 16 to 27%. In that way, the study found that in the central Amazon region, in the dry season, the OC fraction
generates instantaneous effects of up to –100 W m–2 in the radiative surface forcing (FR-Surface), while in the Cerrado
region (Cuiabá) the instantaneous values reached up to –350 W m–2. The impact of the primary biogenic particles on the
radiative flux resulted in a mean, approximately –20 W m–2 FR-Surface, representing 45% of the total effect caused by
aerosols in the Amazon.
Como referenciar
PALACIOS, RAFAEL da S.; ROMERA, KELLY S.; CURADO, LEONE F.A.; BANGA, NELSON M.; ROTHMUND, LUCAS D.; SALLO, FERNANDO da S.; MORAIS, DENES; SANTOS, ANNA C.A.; MORAES, TONNY J.; MORAIS, FERNANDO G.; LANDULFO, EDUARDO; FRANCO, MARCO A. de M.; KUHNEN, IGOR A.; MARQUES, JOÃO B.; NOGUEIRA, JOSE de S.; VALLE JUNIOR, LUIZ C.G. do; RODRIGUES, THIAGO R. Long term analysis of optical and radiative properties of aerosols in the Amazon Basin. Aerosol and Air Quality Research, v. 20, n. 1, p. 139-154, 2020. DOI: 10.4209/aaqr.2019.04.0189. Disponível em: http://repositorio.ipen.br/handle/123456789/31093. Acesso em: 30 Dec 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.