PAULO ARTAXO
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Livro IPEN-doc 28984 O IPEN e a economia do hidrogênio2022 - LINARDI, MARCELO; LUGAO, ADEMAR B.; OLIVEIRA NETO, ALMIR; NETTO, ANA P.F.A.; FREITAS, ANDERSON Z. de; YAMAGATA, CHIEKO; ANDRADE, DELVONEI A. de; ZEZELL, DENISE M.; LAZAR, DOLORES R.R.; CUNHA, EDGAR F. da; FONSECA, EDVALDO R.P. da; MUCCILLO, ELIANA N. dos S.; SANTIAGO, ELISABETE I.; SEO, EMILIA S.M.; SPINACE, ESTEVAM V.; FONSECA, FABIO C.; CARVALHO, FATIMA M.S. de; MOREIRA, FERNANDO; COSTA, ISOLDA; IGAMI, MERY P.Z.; NEGRO, MIGUEL L.M.; ARTAXO, PAULO; MUCCILLO, REGINALDO; CASTANHO, SONIA R.H. de M.; USSUI, VALTER; BERGAMASCHI, VANDERLEI S.; YOSHITO, WALTER K.; CALVO, WILSON A.P.Resumo IPEN-doc 23711 Improved tropical forest biogenic VOC emission factors based on GoAmazon2014/5 airborne observations2015 - GU, DASA; GUENTHER, ALEX B.; YU, HAOFEI; SHILLING, JOHN E.; LONGO, KARLA; YANG, QING; HUANG, MAOYI; ZHAO, CHUN; MARTIN, SCOT T.; ARTAXO, PAULO; KIM, SAEWUNG; SECO, ROGER; STAVRAKOU, TRISSEVGENI; TOTA, JULIO; SOUZA, RODRIGO A.F. de; BUSTILLOS, JOSE O.V.; ALVES, ELIANE G.; LIU, YING; SHRIVASTAVA, MANISHKUMAR B.; LENG, GUOYONG; HU, ZHIYUAN; SANTOS, FERNANDO C. dosBiogenic volatile organic compounds (BVOCs) emitted from terrestrial ecosystems play an important role in atmospheric chemistry and global climate feedbacks. The immense biological and chemical diversity of BVOC is a challenge for the numerical modeling of BVOC emissions, especially for tropical forests. The fast response airborne PTR-MS measurements of BVOC mixing ratios during the GoAmazon2014/5 campaign provide an opportunity to estimate BVOC emissions from tropical forest landscapes using eddy covariance and mixed layer variance techniques. The average isoprene emissions based on airborne measurements are 6.16±4.62 mg m h during wet season and 12.89±8.93 mg m h during dry season. These observations are compared with the spatial and temporal distributions of BVOC emissions estimated using the Model of Emissions of Gases and Aerosols from Nature (MEGAN) within the framework of the Community Land Model (CLM). By comparing the emissions estimated from airborne observations with that from MEGAN simulations, the predictive capability for diverse tropical land cover types are evaluated and an approach for improving model estimates is outlined. Satellite observations are also applied to investigate the environmental driving variables for BVOC emissions. OH concentrations are calculated from the observed BVOC mixing ratios by using the mixed layer mass balance technique and by the gradient in measured eddy covariance fluxes. The calculated values are in general agreement with OH CIMS observations at the T3 ground site near Manacaparu.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.Resumo IPEN-doc 22315 Mechanisms for the formation and growth of nanometer-sized particles in the Amazon: New insights from GoAmazon 2014 and the Tapajos Upwind Dorest Flux Study (TUFFS)2014 - SMITH, JAMES N.; PARK, JEONG H.; KUANG, CHONGAI; VEGA, OSCAR; SOUZA, RODRIGO A.F. de; WIEDEMANN, KENIA T.; MUNGER, J.W.; WOFSY, STEVEN C.; RIZZO, LUCIANA V.; ARTAXO, PAULO; MARTIN, SCOT T.; SECO, ROGER; KIM, SAEWUNG; GUENTHER, ALEX B.; BATALHA, SARAH S.A.; ALVES, ELIANA G.; TOTA, JULIOResumo IPEN-doc 21576 Measurements of in-situ SOA formation and chemistry using an oxidation flow reactor2015 - PALM, BRETT B.; CAMPUZANO-JOST, PEDRO; DAY, DOUGLAS A.; HU, WEIWEI; ORTEGA, AMBER M.; SA, SUZANE S. de; SECO, ROGER; PARK, JEONG-HOO; GUENTHER, ALEX; KIM, SAEWUNG; BRITO, JOEL; WURM, FLORIAN; ARTAXO, PAULO; THALMAN, RYAN; WANG, JIAN; KASER, LISA; JUD, WERNER; KARL, THOMAS; HANSEL, ARMIN; FRY, JULIANE; BRWN, STEVEN S.; DRAPPER, DANIELLE C.; ZARZANA, KYLE J.; DUBE, WILLIAN P.; WAGNER, NICK; HUNTER, JAMES; KROLL, JESSE; HARKER, LINA; SCHARR, ASTRID K.; YEE, LINDSAY; ISAACMAN, GABRIEL; GOLDESTEIN, ALLEN; SOUZA, RODRIGO; MANZI, OSCAR; VEGA, OSCAR; TOTA, JULIO; NEWBURN, MATT K.; ALEXANDER, M.L.; MARTIN, SCOT; BRUNE, WILLIAM H.; JIMENEZ, JOSE L.Resumo IPEN-doc 21578 Measurements of in-situ SOA formation using an oxidation flow reactor at GoAmazon2014/52015 - PALM, BRETT B.; SA, SUZANE S. de; CAMPUZANO-JOST, PEDRO; DAY, DOUGLAS A.; HU, WEIWEI; SECO, ROGER; PARK, JEONG-HOO; GUENTHER, ALEX; KIM, SAEWUNG; BRITO, JOEL; WURM, FLORIAN; ARTAXO, PAULO; YEE, LINDSAY; WERTZ, GABRIEL I. van; GOLDESTEIN, ALLEN; SOUZA, RODRIGO; MANZI, ANTONIO O.; VEGA, OSCAR; TOTA, JULIO; NEWBURN, MATT K.; ALEXANDER, M.L.; MARTIN, SCOT; BRUNE, WILLIAM H.; JIMENEZ, JOSE L.Resumo IPEN-doc 21579 Biogenic VOC emissions estimated from GoAmazon2014/5 airborne observations and implications for atmospheric chemistry over the tropical forest2015 - GU, DASA; GUENTHER, ALEX; YU, HAOFEI; SHILLING, JOHN; YANG, QING; HUANG, MAOYI; ZHAO, CHUN; SHIRIVASTAVA, MANISH; MARTIN, SCOT; ARTAXO, PAULO; LONGO, KARLA; KIM, SAEWUNG; SECO, ROGER; TOTA, JULIO; SOUZA, RODRIGO A.F. de; VEGA, OSCAR; ALVES, ELIANE; CAVALCANTE, FERNANDO; LIU, YING; LENG, GUOYONG; HU, ZHIYUANArtigo IPEN-doc 04270 Técnicas analiticas nucleares aplicadas à caracterização de aerossóis atmosféricos na Região Amazônica1996 - GERAB, FABIO; ARTAXO, PAULOResumo IPEN-doc 04726 Analise elementar de sedimento lacustre por PIXE1997 - GATTI, L.V.; MOZETO, A.A.; ARTAXO NETTO, P.E.; FONSECA, L.F.Resumo IPEN-doc 04729 Total concentration of heavy metals in sediment cores of a riverine floodplain lake1997 - GATTI, L.V.; MOZETO, A.A.; FONSECA, L.F.; ARTAXO NETTO, P.E.