Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.3/1330
Título: Absorption coefficients by aerosols in remote areas: a new approach to decouple dust and black carbon absorption coefficient using seven-wavelength Aethalometer data
Autor: Fialho, Paulo
Hansen, Anthony
Honrath, Richard
Palavras-chave: Absorption Coefficient
Black Carbon
Iron Oxides
Sahara Dust
Aerosol Exponents
PICO-NARE
Seven-Wavelength Aethalometer
Data: Fev-2005
Editora: Elsevier
Citação: Fialho, P.S., A.D.A. Hansen, R.E.Honrath (2005). Absorption coefficients by aerosols in remote areas: a new approach to decouple dust and black carbon absorption coefficient using seven-wavelength Aethalometer data. “Journal of Aerosol Science”, 36(2), 267-282 [http://dx.doi.org/doi:10.1016/j.jaerosci.2004.09.004].
Relatório da Série N.º: Journal of Aerosol Science;36(2)
Resumo: We present a new approach to decouple aerosol absorption coefficients due to iron oxide in Sahara dust from those due to black carbon (BC) particles. Absorption coefficients, σaerosol(λ,t), were measured at the summit of Pico mountain (2225 m ASL) in the Azores Islands using a seven-wavelength Aethalometer. Measurements between 27th July and 1st August, 2001, are analyzed here. Variations in aerosol absorption coefficients were uncorrelated to those of CO during the latter part of this period, suggesting the presence of non-combustion-derived aerosol, apparently African dust. To differentiate between BC and other absorbing particles, we analyzed the wavelength dependence of σaerosol(λ,t) and determined a best-fit exponent during the later period equal to -2.9±0.2, somewhat lower than previously reported for soil dust. Using this method, it is possible to estimate the aerosol absorption due to BC and that due to soil dust separately through the full period analyzed.
Descrição: Copyright © 2004 Elsevier Ltd. All rights reserved.
Peer review: yes
URI: http://hdl.handle.net/10400.3/1330
ISSN: 0021-8502
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S0021850204003398
Aparece nas colecções:DCA - Artigos em Revistas Internacionais / Articles in International Journals

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