IZABEL DA SILVA ANDRADE
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Artigo IPEN-doc 28401 Methane detection in the lower troposphere related to the burning of biomass and leakage in a petrochemical pole, using Raman lidar technique2021 - MACEDO, FERNANDA de M.; CORREA, THAIS; ARAUJO, ELAINE C.; ANDRADE, IZABEL da S.; GUARDANI, ROBERTO; VESELOVSKII, IGOR; LANDULFO, EDUARDOFugitive emissions, defined as unintended or irregular leaks of gases and vapors, are an important source of pollutants to the atmosphere, which is difficult to monitor and control. These sources are present in different sites, especially in regions that are growing in size and economic activity. In this study, we present the results of the capability to detect methane profiles at low troposphere combining data retrieval correlations between a rotacional/vibracional Raman lidar (RVRL) and a cavity ring-down spectrometer (CRDS). The measurements were made at two different sites, metropolitan area of São Paulo (MSP) and industrial area of Cubatão (IC). The lidar is based on a tripled Nd:YAG laser with a 20 Hz repetition rate, operating on the 355 nm wavelength elastic channel, the 353 nm and 396 nm wavelength inelastic channels. A measurement protocol was established, considering acquisition time for signal accumulation, climatic conditions and data above and below the planetary boundary layer. The idea was to establish specific measurement procedures for situations related to product leakage in the oil process and natural events, such as biomass burning. With over 150 hours of data acquisition, the results pointed the possibility of analyzing data from distances up to 1500 m with an initial resolution of 7.5 m which was extended to 100 - 300 m after data smoothing for obtaining final results. The concentration was calculated from the ratio between the methane Raman backscatter signal and the nitrogen signal, at 396 nm and 353 nm, respectively. The temporal variation of methane concentrations was correlated with CRDS data, in order to obtain a first degree calibration.Artigo IPEN-doc 27755 Influence of a biomass-burning event in PM2.5 concentration and air quality2021 - MOREIRA, GREGORI de A.; ANDRADE, IZABEL da S.; CACHEFFO, ALEXANDRE; LOPES, FABIO J. da S.; YOSHIDA, ALEXANDRE C.; GOMES, ANTONIO A.; SILVA, JONATAN J. da; LANDULFO, EDUARDOSevere biomass burning (BB) events have become increasingly common in South America in the last few years, mainly due to the high number of wildfires observed recently. Such incidents can negatively influence the air quality index associated with PM2.5 (particulate matter, which is harmful to human health). A study performed in the Metropolitan Area of São Paulo (MASP) took place on selected days of July 2019, evaluated the influence of a BB event on air quality. Use of combined remote sensing, a surface monitoring system and data modeling and enabled detection of the BB plume arrival (light detection and ranging (lidar) ratio of (50 ± 34) sr at 532 nm, and (72 ± 45) sr at 355 nm) and how it affected the Ångström exponent (>1.3), atmospheric optical depth (>0.7), PM2.5 concentrations (>25 µg.m−3), and air quality classification. The utilization of high-order statistical moments, obtained from elastic lidar, provided a new way to observe the entrainment process, allowing understanding of how a decoupled aerosol layer influences the local urban area. This new novel approach enables a lidar system to obtain the same results as a more complex set of instruments and verify how BB events contribute from air masses aloft towards near ground ones.Artigo IPEN-doc 27050 Correlation study between air quality data and the Lidar system in Cubatao, Sao Paulo2017 - ARAUJO, ELAINE C.; ANDRADE, IZABEL da S.; MACEDO, FERNANDA de M.; CORREA, THAIS; SALANI, MARIA H.G. de A.; COSTA, RENATA F. da; RAMOS, SERGIANA dos P.; MARQUES, MARCIA T.A.; LOPES, DANIEL S.; GUARDANI, MARIA L.G.; LANDULFO, EDUARDO; GUARDANI, ROBERTOWe present here the results of two methods with a scanning multiwavelength elastic lidar system and Beta Ray method (CETESB) realized in an industrial area. The objective is a comparer of these two methods to identify fixed sources of aerosol and to monitor plume dispersion. The results of the two aligned techniques indicate that can provide information on the concentration, spatial and temporal distribution of aerosol.Dissertação IPEN-doc 25663 Análise da dispersão de aerossóis em Cubatão-SP por meio de técnicas de sensoriamento remoto2019 - ANDRADE, IZABEL da S.A cidade de Cubatão está localizada na região da baixada santista, no estado de São Paulo. Ela conta com um dos maiores complexos industriais do Brasil, tendo este iniciado as suas atividades na década de cinquenta. Cubatão, tornou-se uma grande potência econômica seguindo as tendências de seu desenvolvimento industrial. Contudo o progresso fabril aliado a ausência de políticas públicas e regulatórias, no que se refere à emissão de poluentes atmosféricos, trouxe graves consequências ambientais. A ausência de leis ocasionou um grande problema ambiental em Cubatão na década de oitenta, época na qual a região atingiu níveis altíssimos de poluição atmosférica, ganhou grande repercussão internacional e deu origem ao termo Vale da morte. Após este acontecimento, foram desenvolvidas as leis regulamentadoras de emissões atmosféricas, tanto no âmbito estadual quanto no federal. Hoje apesar de Cubatão possuir níveis mais baixos de poluição e emissões industriais controladas, é possível notar ultrapassagens dos padrões de qualidade do ar. Baseado no contexto apresentado sobre o município, o presente trabalho tem como objetivo realizar um estudo da dispersão dos poluentes na região de Cubatão-SP utilizando técnicas diversas, como: sensoriamento remoto - técnica Light Detection and Ranging (LIDAR) e dados de satélite - e informações de qualidade do ar disponibilizados pela CETESB.