Artículos, Informes y presentaciones en Congresos
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Examinando Artículos, Informes y presentaciones en Congresos por Autor "Quaranta, Nancy Esther"
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- Documento de conferencia
Acceso Abierto Calidad de aire en la ciudad de Rafaela(2007) Quaranta, Nancy Esther; Unsen, M.; Giansiracusa, C.; Panigatti, M. C.; Griffa, C.; Bolgione, R.; Cassina, D.Dentro del ambiente urbano la calidad del aire es afectada fundamentalmente por presencia de sustancias que provienen de los procesos de combustión producidos en los vehículos de transporte público y privado. Los contaminantes primarios más importantes son CO, NOx, SO2, HC, y material particulado. En el presente trabajo se estudia la calidad del aire en zona céntrica de la ciudad de Rafaela, provincia de Santa Fe, Argentina. La ciudad de Rafaela se encuentra en la zona centrooeste de la provincia de Santa Fe. Su población es de 82.530 habitantes y cuenta con un parque automotor de alrededor de 59.679 vehículos. (Datos de INDEC Censo 2001 y RNRPA 2007). - Documento de conferencia
Acceso Abierto Contaminación lumínica como tópico en las carreras de Ingeniería(2007) Quaranta, Nancy Esther; Cionco, RodolfoEn el presente trabajo se exponen las líneas de acción propuestas en la Facultad Regional San Nicolás, Universidad Tecnológica Nacional, para desarrollar la introducción de la contaminación lumínica como tópico regular de estudio dentro de algunas de las carreras de Ingeniería, como por ejemplo: Eléctrica, Electrónica, Mecánica e Industrial. Estas actividades se enmarcan en el Proyecto Integrador para la Mitigación de la Contaminación Atmosférica (PROIMCA) de la UTN. - Documento de conferencia
Acceso Abierto Intraseasonal characterization of tropospheric O3 in the North of the Buenos Aires Province: determining four months cycle and teleconnection evidence(2013) Cionco, Rodolfo; Rodriguez, Rubén; Quaranta, Nancy Esther; Agosta, EduardoTropospheric ozone (O3T) is a secondary pollutant whose formation involved primarily solar radiation, NOx and volatile organic compounds. The North of the Buenos Aires Province (Argentina), has great agricultural-industrial activity; therefore, O3T study is an important issue in the area. In this paper, we present the first results tend to estimate and characterize O3T in San Nicolás de los Arroyos, North of Buenos Aires. Due to a lack of in situ data, we analyse the observations of the instrument OMI (Ozone Monitoring Instrument) of land remote sensing satellite AURA (GSFC/NASA). The data cover the years 2004- 2013. Applying the multitaper technique (MTM), very suitable for short and noisy data series, spectral analysis is performed on a grid corresponding 1° in latitude by 1.5° in longitude, centred South of the Province of Santa Fe. The most remarkable result is the emergence of a significant peak (95%) of four months cycle. To test the validity of this signal in San Nicolás, daily solar radiation data (Q) were analysed in the area. The application of MTM to the daily values of Q, yields a spectral peak of 120 days. It is concluded that atmospheric opacity on the site has four months variations that modify the solar radiation at the troposphere and consequently, the production rate of O3T. Evidence that these variations are due to teleconnection process originated in the Maritime Continent are presented. - Documento de conferencia
Acceso Abierto Light Pollution as Part of the Environmental Problems(2006) Quaranta, Nancy Esther; Cionco, RodolfoUnscrupulous outdoor lighting produces a number of effects that are currently included under the term light pollution. Its consequences (e.g. loss of resources by energy waste), are being recognized for some time, as well as the possibility to mitigate this pollution. In the present work, we present some lines of action developed at the Facultad Regional San Nicolás of National Technological University (UTN) of Argentina to include the CL as a regular topic of study in the problems of air pollution. - Documento de conferencia
Acceso Abierto Niveles de contaminación de aire: relación con distintos factores(2007) Quaranta, Nancy Esther; Caligaris, Marta; Unsen, M.; Rodríguez, G.; López, H.; Giansiracusa, C.; Vázquez, P.Se realizaron estudios de diferentes contaminantes gaseosos y material particulado en varias ciudades de la Provincia de Buenos Aires, Argentina. Estas ciudades tienen diferencias notables respecto del número de habitantes, la densidad vehicular, la actividad industrial, etc. Ellas son La Plata, Bahía Blanca, Mar del Plata, Pergamino, San Nicolás, entre otras. En cada ciudad, se instaló un equipo de monitoreo continuo con tecnología de sensores electroquímicos para determinar NOx, CO, HC, SO2 y O3. Las muestras del material particulado total para su análisis fisicoquímico fueron recogidas usando un equipo de alto volumen, y las concentraciones diarias de PM10 fueron determinadas por analizador de tecnología láser. Las partículas fueron caracterizadas por microscopías óptica y electrónica de barrido, y análisis por difracción electrónica de Rayos X. Los resultados obtenidos mostraron una relación directa entre el tipo y la cantidad de las partículas presentes y las características generales de las ciudades. - Documento de conferencia
Acceso Abierto Particulate matter dynamics(2011) Cionco, Rodolfo G.; Quaranta, Nancy Esther; Caligaris, MartaA substantial fraction of the particulate matter released into the atmosphere by industrial or natural processes corresponds to particles whose aerodynamic diameters are greater than 50 mm. It has been shown that, for these particles, the classical description of Gaussian plume diffusion processes, is inadequate to describe the transport and deposition. In this paper we present new results concerning the dispersion of coarse particulate matter. The simulations are done with our own code that uses the Bulirsch Stoer numerical integrator to calculate threedimensional trajectories of particles released into the environment under very general conditions. Turbulent processes are simulated by the Langevin equation and weather conditions are modeled after stable (Monin-Obukhov length> 0) and unstable conditions (L <0). We present several case studies based on Monte Carlo simulations and discusses the effect of weather on the final deposition of these particles. - Documento de conferencia
Acceso Abierto A preliminary study of the linear relationship between monthly averaged daily solar radiation and daily thermal amplitude in the north of Buenos Aires province(2012) Cionco, Rodolfo; Quaranta, Nancy Esther; Rodriguez, RubénUsing irradiance and temperature measurements obtained at the Facultad Regional San Nicolás of UTN, weperformed a preliminary study of the linear relationship between monthly averaged daily solar radiation anddaily thermal amplitude. The results show a very satisfactory adjustment (R = 0.848, RMS = 0.066, RMS% =9.690 %), even taking into account the limited number of months (36). Thus, we have a formula of predictivenature, capable of estimating mean monthly solar radiation for various applications. We expect to have new datasets to expand and improve the statistical significance of these results. - Documento de conferencia
Acceso Abierto Simulations of dispersion and deposition of coarse particulate matter(2009) Cionco, Rodolfo; Quaranta, Nancy Esther; Caligaris, MartaIn order to study the dispersion and deposition of coarse anthropogenic particulate matter (PMc, aerodynamic diameters> 10 mm), a FORTRAN simulator based on the numerical integrator of Bulirsch and Stoer has been developed. It calculates trajectories of particles of several shapes released into the atmosphere under very general conditions. This first version, fully three-dimensional, models the meteorology under neutral stability conditions. The simulations of such pollutants are also important because the standard software (usually originating in the United States Environmental Protection Agency-EPA-) describe only the behavior of PM10 (diameter less than 10 mm). Bulirsch and Stoer integrator of widespread use in astrophysics, is also very fast and accurate for this type of simulations. We present 2D and 3D trajectories in physical space and discuss the final deposition in function of various parameters. PMc simulations results in the range of 50-100 mm and densities of 5.5 g cm-3 emitted from chimneys, indicate that for the purpose of deposition, the emission velocities are not as important as wind speed and the shape of the particles. For densities less than 2 g cm-3, the lack of consideration of buoyancy introduces important changes in the distribution of deposited PMc. - Documento de conferencia
Acceso Abierto Sobre el cálculo de la insolación a lo largo del tiempo(2007) Cionco, Rodolfo; Caligaris, Marta; Quaranta, Nancy EstherEl objetivo del presente trabajo es obtener expresiones aproximadas, suficientemente precisas y sencillas a fin de modelar, a partir de un valor de la constante solar, la radiación incidente en un determinado punto de la atmósfera o de la corteza terrestre, debido al cambio de orientación del Sol a lo largo del día y del año.