PAULO ARTAXO
14 resultados
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Artigo IPEN-doc 22603 PIXE, PIGE and ion chromatography of aerosol particles from northeast Amazon Basin1998 - GERAB, FABIO; ARTAXO, PAULO; GILLETT, R.; AYERS, G.Characterization of atmospheric aerosols collected in the northeast part of the Amazon Basin is presented. The main aerosol source in that region is the forest natural biogenic emission. The aerosol samples were collected using stacked filter units, and were analyzed applying several analytical techniques: Particle Induced X-ray Emission (PIXE) for the quantitative analysis of trace elements with 2 > 1 I; Particle Induced Gamma-ray Emission (PIGE) for the quantitative analysis of Na; Ion Chromatography (IC) was used to quantify ionic contents of aerosols from the fine mode particulate samples. A reflectance technique was used in order to measure black carbon concentrations; Gravimetric analysis was used in order to determine the total atmospheric aerosol mass concentration. The comparison from PIXE and IC concentration measurements for S. K and Ca techniques were in an excellent agreement. A good agreement was also obtained for Na concentrations measured by PIGE and IC techniques. Multivariate statistical analysis was used in order to identify and characterize the sources of the atmospheric aerosol present in the sampled region. The Serra do Navio aerosol is characterized by biogenic emissions. responsible for the majority of the total fine mass concentration. A strong marine influence was also noted. Soil dust is also an important aerosol source in that region.Artigo IPEN-doc 13830 Synergetic measurements of aerosols over Sao Paulo, Brazil using LIDAR, sunphotometer and satellite data during the dry season2003 - LANDULFO, E.; PAPAYANNIS, A.; ARTAXO, P.; CASTANHO, A.D.A.; FREITAS, A.Z. de; SOUZA, R.F.; VIEIRA JUNIOR, N.D.; JORGE, M.P.M.P.; SANCHEZ-CCOYLLO, O.R.; MOREIRA, D.S.Artigo IPEN-doc 13037 Scanning proton microprobe applied to analysis of individual aerosol particles from Amazon Basin1998 - GERAB, FABIO; ARTAXO, PAULO; SWIETLICKI, ERIK; PALLON, JANArtigo IPEN-doc 12951 Physical properties of the sub-micrometer aerosol over the Amazon rain forest during the wet-to-dry season transition - comoparison of modeled and measured CCN concentrations2004 - RISSLER, J.; SWIETLICKI, E.; ZHOU, J.; ROBERTS, G.; ANDREAE, M.O.; GATTI, L.V.; ARTAXO, P.Artigo IPEN-doc 12883 Overview of the inorganic and organic composition of size-segregated aerosol in Rondonia, Brazil, from the biomass-burning period to the onset of the wet season2007 - FUZZI, SANDRO; DECESARI, STEFANO; FACCHINI, MARIA C.; CAVALLI, FABRIZIA; EMBLICO, LORENZA; MIHAIELA, MIRCEA; ANDREAE, MEINRAT O.; TREBS, IVONNE; HOFFER, ANDRAS; GUYON, PASCAL; ARTAXO, PAULO; RIZZO, LUCIANA V.; LARA, LUCIENE L.; PAULIQUEVIS, THEOTONIO; MAENHAUT, WILLY; RAES, NICO; CHI, XUGUANG; MAYOL BRACERO, OLGA L.; SOTO GARCIA, LYDIA L.; CLAEYS, MAGDA; KOURTCHEV, IVAN; RISSLER, JENNY; SWIETLICKI, ERIK; TAGLIAVINI, EMILIO; SCHKOLNIK, GAL; FALKOVICH, ALLA H.; RUDICH, YIMON; FISCH, GILBERTO; GATTI, LUCIANA V.Artigo IPEN-doc 11679 Spectral light absorption by ambient aerosols influenced by biomass burning in the Amazon Basin. I: Comparison and field calibration of absorption measurement techniques2006 - SCHMID, OTMAR; ARTAXO, PAULO; ARNOTT, PATRICK W.; DULI, CHAND; GATTI, LUCIANA V.; FRANK, G.P.; HOFFER, A.; SCHNAITER, M.; ANDREAE, M.O.Artigo IPEN-doc 11677 Optical and physical properties of aerosols in the boundary layer and free troposphare over the Amazon Basin during the biomass burning season2006 - DULI, CHAND; GUYON, PASCAL; ARTAXO, PAULO; SCHMID, OTMAR; FRANK, G.P.; RIZZO, L.V.; MAYOL BRACERO, O.L.; GATTI, LUCIANA V.; ANDREAE, M.O.Artigo IPEN-doc 11542 Troposphereic aerosol observations in Sao Paulo, Brazil using a compact lidar system2005 - LANDULFO, E.; PAPAYANNIS, A.; FREITAS, A.Z.; MOREIRA, D.S.; VIEIRA JUNIOR, NILSON D.; SOUZA, R.F.; GONCALVES, A.; CASTANHO, A.D.A.; ARTAXO, PAULO; SANCHEZ CCOYLLO, O.R.; JORGE, M.P.M.P.Artigo IPEN-doc 11416 Airborne measurements of trace gas and aerosol particle emissions from biomass burning in Amazonia2006 - GUYON, P.; FRANK, G.; WELLING, M.; CHAND, D.; ARTAXO, P.; RIZZO, L.; NISHIOKA, G.; KOLLE, O.; FRITSCH, H.; SILVA DIAS, M.A.F.; GATTI, L.V.; CORDOVA, M.; ANDREAE, M.O.Artigo IPEN-doc 11402 Spectral light adsorption by ambient aerosols influenced by biomass burning in the Amazon Basin - I. Comparison and field calibration of absorption measurement techniques2005 - SCHMID, O.; ARTAXO, P.; ARNOTT, W.P.; CHAND, D.; GATTI, L.V.; FRANK, G.P.; HOFFER, A.; SCHNAITER, M.; ANDREAE, M.O.