4 documents found, page 1 of 1
Elemental composition of the atmospheric aerosol in the central Amazon basin
Arana, Andréa A.; Artaxo, PauloThe processes and sources that regulate the elemental composition of aerosol particles were investigated in both fine and coarse modes during the dry and wet seasons. One hundred and nine samples were collected from the biological reserve Cuieiras - Manaus from February to October 2008, and analyzed together with 668 samples that were previously collected at Balbina from 1998 to 2002. Particle induced X-ray emi...
Long term measurements of aerosol optical properties at a primary forest site i...
Rizzo, L. V.; Artaxo, Paulo; Müller, Thomas; Wiedensohler, Alfred; Paixão, Melina; Cirino, Glauber G.; Arana, Andréa A.; Swietlicki, ErikA long term experiment was conducted in a primary forest area in Amazonia, with continuous in-situ measurements of aerosol optical properties between February 2008 and April 2011, comprising, to our knowledge, the longest database ever in the Amazon Basin. Two major classes of aerosol particles, with significantly different optical properties were identified: coarse mode predominant biogenic aerosols in the wet...
Long term measurements of the elemental composition and optical properties of a...
Arana, Andréa A.; Artaxo, Paulo; Rizzo, L. V.; Bastos, WanderleiAerosols are being collected and analyzed for trace elements in two sites in Amazonia since January 2008. On eof the site, Manaus is located in a very pristine area in Central Amazonia. The site is nt affected directly by any urban plume for thousands of kilometers. A second site is located in Porto Velho, in a region with heavy land use change and deforestation. Optical properties (light scattering ad absorpti...
Atmospheric aerosols in Amazonia and land use change: From natural biogenic to ...
Artaxo, Paulo; Rizzo, Luciana Varanda; Brito, Joel F.; Barbosa, H. M. J.; Arana, Andréa A.; Sena, E. T.; Cirino, Glauber G.; Bastos, WanderleiIn 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 ...