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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2018-10
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
02 Mar 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).
Source apportionment of atmospheric aerosol in a marine dusty environment by Ionic/composition Mass Balance (IMB)
João Cardoso1,2, Susana M. Almeida3, Teresa Nunes1, Marina Almeida-Silva3, Mário Cerqueira1, Célia Alves1, Fernando Rocha4, Paula Chaves3, Miguel Reis3, Pedro Salvador5, Begoña Artiñano5, and Casimiro Pio1 1CESAM & Dep. Environ, Aveiro University, Aveiro, 3810-193, Portugal
2Cape Verde University, Praia, 279, Cape Verde
3C2TN, Instituto Superior Técnico, Lisbon University, Bobadela, 2695-066, Portugal
4Geobiotec & Dep. Geosciences, Aveiro University, Aveiro, 3810-193, Portugal
5Environ Dep, CIEMAT, Madrid, 28040, Spain
Abstract. PM10 aerosol was sampled in Santiago, the largest island of Cape Verde, for one year and analysed for elements, ions and carbonaceous material. Very high levels of dust were measured during the winter months, as a result of the direct transport of dust plumes from the African continent. Ionic and Mass Balances (IMB) were applied to the analysed compounds, permitting the determination of 6–7 different processes and source contributions to the aerosol loading: insoluble and soluble dust, sea-salt, carbonaceous material and secondary inorganic compounds resulting from the reaction of acidic precursors with ammonia, sea-salt and dust. The mass balance could be closed by the consideration and estimation of sorbed water that constituted 20–30 % of the aerosol mass. The balance methodology was compared with Positive Matrix Factorization (PMF), giving quite similar results throughout the sampling campaign. This gives confidence in the capability of both methods, which are complementary, for the source apportionment of aerosol particles.
Citation: Cardoso, J., Almeida, S. M., Nunes, T., Almeida-Silva, M., Cerqueira, M., Alves, C., Rocha, F., Chaves, P., Reis, M., Salvador, P., Artiñano, B., and Pio, C.: Source apportionment of atmospheric aerosol in a marine dusty environment by Ionic/composition Mass Balance (IMB), Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2018-10, in review, 2018.
João Cardoso et al.
João Cardoso et al.
João Cardoso et al.

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Short summary
Atmospheric aerosol was sampled in Cape Verde islands and analysed for chemical composition. Very high levels of dust were measured during the winter months, as a result of transport from Africa. Mass Balances were applied to the particulate material, permitting the determination of 7 different source contributions to the aerosol loading. The balance methodology compared well with Standard Source Apportionment methods, showing its capability for the source apportionment of aerosol particles.
Atmospheric aerosol was sampled in Cape Verde islands and analysed for chemical composition....
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