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          Institute: MPI für Chemie     Collection: Publikationen MPI für Chemie     Display Documents

ID: 675675.0, MPI für Chemie / Publikationen MPI für Chemie
Atmospheric aerosols in Amazonia and land use change: from natural biogenic to biomass burning conditions
Authors:Artaxo, P.; Rizzo, L. V.; Brito, J. F.; Barbosa, H. M. J.; Arana, A.; Sena, E. T.; Cirino, G. G.; Bastos, W.; Martin, S. T.; Andreae, M. O.
Date of Publication (YYYY-MM-DD):2013
Title of Journal:Faraday Discussions
Start Page:203
End Page:235
Review Status:Internal review
Audience:Experts Only
Abstract / Description:In the wet season, a large portion of the Amazon region constitutes one of the most pristine continental areas, with very low concentrations of atmospheric trace gases and aerosol particles. However, land use change modifies the biosphere-atmosphere interactions in such a way that key processes that maintain the functioning of Amazonia are substantially altered. This study presents a comparison between aerosol properties observed at a preserved forest site in Central Amazonia (TT34 North of Manaus) and at a heavily biomass burning impacted site in south-western Amazonia (PVH, close to Porto Velho). Amazonian aerosols were characterized in detail, including aerosol size distributions, aerosol light absorption and scattering, optical depth and aerosol inorganic and organic composition, among other properties. The central Amazonia site (TT34) showed low aerosol concentrations (PM2.5 of 1.3 +/- 0.7 mu g m(-3) and 3.4 +/- 2.0 mu g m(-3) in the wet and dry seasons, respectively), with a median particle number concentration of 220 cm(-3) in the wet season and 2200 cm(-3) in the dry season. At the impacted site (PVH), aerosol loadings were one order of magnitude higher (PM2.5 of 10.2 +/- 9.0 mu g m(-3) and 33.0 +/- 36.0 mu g m(-3) in the wet and dry seasons, respectively). The aerosol number concentration at the impacted site ranged from 680 cm(-3) in the wet season up to 20 000 cm(-3) in the dry season. An aerosol chemical speciation monitor (ACSM) was deployed in 2013 at both sites, and it shows that
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Chemie
Identifiers:ISI:000329068600011 [ID No:1]
ISSN:1359-6640 [ID No:2]
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