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Resumo IPEN-doc 23286 First Urban Boundary layer determination from Lidar measurements at Natal (Brazil)2016 - SANTOS, RENATA; CAMILO, DANIEL; ARAUJO, MARCOS P.; GUEDES, ANDERSON; HOELZEMANN, JUDITH; HENRIQUE, JOSE; LOPES, FABIO; LANDULFO, EDUARDO; MONTILLA-ROSERO, ELENAThe planetary boundary layer (PBL) height is a crucial parameter for air quality monitoring or forecasting and is essential for the interpretation of atmospheric constituents. A first determination of PBL height has been done through the identification of the minimum in the vertical gradients of Lidar profiles measured with a multiwavelength polarized Lidar system (named DUSTER) developed by the Laser Environmental Application Laboratory (LEAL) at the Nuclear and Energy Research Institute (IPEN, São Paulo, Brazil) and installed in February, 2016 at the Department of Atmospheric and Climate Sciences of the Federal University of Rio Grande do Norte (UFRN) in the city of Natal, Rio Grande do Norte, in the Brazilian Northeast (5°50’29 S, 35°11’57 W, sea level). In this work, the first information about daily evolution of urban PBL height in Natal is presented.Resumo IPEN-doc 23283 Absorbing aerosols monitoring over remote regions2016 - GORDILLO, M.; MONICK, G.; ROMAN, R.; LYAMANI, H.; TITOS, G.; GUERRERO-RASCADO, J.L.; BASTIDAS, A.E.; HOELZEMANN, J.J.; LANDULFO, E.; BARBOSA, H.M.J.; MONTILLA-ROSERO, E.; NISPERUZA, D.Although the Earth’s atmosphere consists primarily of gases, aerosols and clouds play important roles in the Earth’s energy balance and climate. Aerosols alter the Earth’s energy budget directly by scattering and absorbing radiation and indirectly by modifying cloud microphysical and radiative properties. Evaluation of aerosol effects on climate must take into account high spatial and temporal variation of aerosol amounts and properties as well as the aerosol interactions with clouds and precipitation. Combustion of carbonaceous fuels for the production of energy inevitably results in the emission of gas and particulate air pollutants. A large fraction of the emitted particles are light absorbing carbonaceous aerosols that exhibit very large optical absorption across the spectrum. The most measured light absorbing carbonaceous aerosol is black carbon (BC), a unique primary tracer for combustion emissions as it is not emitted by any other sources. In the project “Absorbing aerosols monitoring over remote regions”, we have used a lightweight aircraft to obtain information on the BC and other light absorbing carbonaceous aerosols concentrations. Thus, we have determined the regional heterogeneity and vertical distribution in the atmosphere of carbonaceous aerosols with a minor payload and for a fraction of the costs associated with large airborne platforms. The aircraft has been equipped with an aethalometer to measure aerosol absorption at different wavelengths. The wavelength dependence of absorption will enable us to apportion BC concentrations to two major sources: biomass and fossil fuel combustion. Measurements have been performed throughout the flight including regions where no or very little measurements have been performed in the past, such as the Arctic, Africa, South America and over the Atlantic Ocean. Along the flight special spiral flights over lidar stations operated in the frame of the global network GALION were carried out and were analyzed in this work. Plumes of pollution and mineral dust were detected and by the use of back trajectories the possible source regions were identified.Resumo IPEN-doc 23278 Tropospheric vertical profiles of aerosol optical parameter at Brazilian Northeastern: preliminary results2016 - MONTILLA-ROSERO, ELENA; LOPES, FABIO; GUEDES, ANDERSON; HOELZEMANN, JUDITH; HENRIQUE, JOSE; GERRERO-RASCADO, JUAN L.; ALADOS, LUCAS; LANDULFO, EDUARDOFor understanding the dust transport processes and retrieving essential data for continuing validation and improvement of satellite products as for evaluating and improving aerosol and dust simulations with global and regional models as well, a multi-wavelength elastic depolarizing LIDAR system, developed by the Center of lasers and applications at IPEN, has been collocated with a sunphotometer CIMEL at Natal, northeastern city of Brazil. Through vertical profiling of dust optical and microphysical properties i.e, backscatter and extinction coefficients and particle depolarization ratio at 532 nm, the LIDAR system is planned to be a crucial point for progress on the assessment of aerosol radiative impact and aerosol-cloud interaction research. In this work, the first measurements carried out with the depolarization channels during February, March and April 2016, and the retrieved vertical profiles of aerosol backscatter coefficient are presented. Three-dimensional air mass back trajectory analysis was also conducted to determine the source regions of aerosols observed during this study.Artigo IPEN-doc 22881 Identification and monitoring of atmospheric particles by multiwavelength Radar Laser in South America2016 - MONTILLA-ROSERO, E.; SILVA, A.; JIMENEZ, C.; GUEDES, A.; HOELZEMAN, J.; LOPES, F.; LANDULFO, E.; SAAVEDRA, C.First monitoring LIDAR measurements of tropospheric aerosols in two different places of South America are reported. Characteristics optical parameters were retrieved using inversion algorithms for two coastal cities in the Pacific and Atlantic Oceans.Artigo IPEN-doc 20290 The first ALINE measurements and intercomparison exercise on lidas inversion algorithms2014 - BARBOSA, H.M.J.; LOPES, F.J.S.; SILVA, A.; NISPERUZA, D.; BARJA, B.; RISTORI, P.; GOUVEIA, D.A.; JIMENEZ, C.; MONTILLA, E.; MARIANO, G.L.; LANDULFO, E.; BASTIDAS, A.; QUEL, E.J.