19 results on '"Müller, Gabriela Viviana"'
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2. Modeling of leptospirosis outbreaks in relation to hydroclimatic variables in the northeast of Argentina
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Gómez, Andrea Alejandra, primary, López, María Soledad, additional, Müller, Gabriela Viviana, additional, López, Leonardo Rafael, additional, Sione, Walter, additional, and Giovanini, Leonardo, additional more...
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- 2022
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3. Characteristics of droughts in Argentina's core crop region
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Sgroi, Leandro Carlos, primary, Lovino, Miguel Angel, additional, Berbery, Ernesto Hugo, additional, and Müller, Gabriela Viviana, additional
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- 2021
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4. Characteristics of droughts in Argentina's Core Crop Region
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Sgroi, Leandro Carlos, primary, Lovino, Miguel Angel, additional, Berbery, Ernesto Hugo, additional, and Müller, Gabriela Viviana, additional
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- 2020
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5. Corrigendum to “Climate change communication by the local digital press in northeastern Argentina: An ethical analysis” [Sci. Total Environ. 707 (2020), 1–7/135737]
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López, María Soledad, primary, Santi, María Florencia, additional, Müller, Gabriela Viviana, additional, Gómez, Andrea Alejandra, additional, Staffolani, Claudio, additional, and Pomares, Luis Aragones, additional more...
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- 2020
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6. Climate change communication by the local digital press in northeastern Argentina: An ethical analysis
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López, María Soledad, primary, Santi, María Florencia, additional, Müller, Gabriela Viviana, additional, Gómez, Andrea Alejandra, additional, Staffolani, Claudio, additional, and Pomares, Luis Aragones, additional more...
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- 2020
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7. Análise espacial dos padrões de variabilidade da precipitação sobre a américa do sul
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Gomes, Mariah Sousa, Cavalcanti, Iracema Fonseca de Albuquerque, Müller, Gabriela Viviana, Gomes, Mariah Sousa, Cavalcanti, Iracema Fonseca de Albuquerque, and Müller, Gabriela Viviana
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A América do Sul apresenta grandes dimensões territoriais, abrangendo, assim, climas de aspectos distintos. Da mesma forma, alterações na circulação atmosférica em grande escala podem influenciar em seus padrões de variabilidade da precipitação, e consequentemente na ocorrência de extremos climáticos. Embora alguns estudos tenham demonstrado o comportamento médio das chuvas em dadas macro-regiões, importantes localmente por questões econômicas, o padrão espacial no continente é pouco evidenciado. Com objetivo de determinar o padrão de variabilidade de precipitação na América do Sul, o conjunto de dados do Global Precipitation Climatology Project (GPCP) foi utilizado para o cálculo do Índice de Precipitação Padronizado (SPI), ponto a ponto de grade, para cada mês, tendo como período base 1982 - 2019. Aplicou-se a análise de Componentes Principais Modo S (ACP) às séries de SPI e obteve-se o padrão espacial de variabilidade de chuvas em cada mês do ano. Os resultados obtidos para o verão (DJF) e primavera (SON) se mostraram consistentes com aspectos já conhecidos da estação chuvosa do Sistema de Monções da América do Sul, contrastando com o regime mais seco de inverno (JJA). Os meses de maio, junho e setembro apresentaram maiores diferenças dos padrões espaciais das estações correspondentes, o que pode ser explicado pelo fato de pertencerem a períodos de transição entre estações, os quais ainda necessitam de um melhor entendimento., isbn: 9786557065556, Pages: 1-11 more...
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- 2020
8. Climate change communication by the local digital press in northeastern Argentina: An ethical analysis
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Universidad de Alicante. Departamento de Ingeniería Civil, López, María Soledad, Santi, María Florencia, Müller, Gabriela Viviana, Gómez, Andrea Alejandra, Staffolani, Claudio, Aragonés, Luis, Universidad de Alicante. Departamento de Ingeniería Civil, López, María Soledad, Santi, María Florencia, Müller, Gabriela Viviana, Gómez, Andrea Alejandra, Staffolani, Claudio, and Aragonés, Luis more...
- Abstract
News articles about Climate Change (CC) represent the level of knowledge of the phenomenon by journalists and the public, as well as the value assigned to problems of ethical and transgenerational nature in a given society. Digital articles related to CC released by media from northeast Argentina were reviewed to study how the local digital press addresses the CC in this region as well as the social representation of the news. An analysis of the content of news articles released in the period January 2016–March 2018 was carried out to identify components that explain their social representation. This study shows that local digital media publish articles about regionally important topics. However, news about CC appear mainly when hydroclimatic events occur. Many of the digital media that release CC information are connected to important social sectors in the region, such as agriculture and economics. A difference between national and local media is that the first ones focus on international events while the latter show the regional reality. Our results also show that no exchange or reciprocity mechanism exists among CC stakeholders, such as journalists, academics and decision-makers. Consequently, building new ways to communicate CC remains a challenge. The media together with scientists, and policy-makers, have a fundamental role in showing the ethical value and importance of caring for Nature and our environment, so to leave the best possible world for future generations. more...
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- 2020
9. Characteristics of droughts in Argentina's Core Crop Region.
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Sgroi, Leandro Carlos, Lovino, Miguel Angel, Berbery, Ernesto Hugo, and Müller, Gabriela Viviana
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The current study advances the documentation of dry episodes over Argentina's Core Crop Region, where the production of major crops like wheat, corn, and soybean is most intense and represents the main contribution to the country's Gross Domestic Product. Our analysis focuses on the properties of droughts that include their magnitude, frequency at different time scales, duration, and severity. It is of interest to assess the relationship between those properties and the crop yields. We analyzed 40 years of precipitation and soil moisture at resolutions suitable for regional studies. The analysis of precipitation and soil moisture anomalies is complemented with the corresponding standardized indices estimated at time scales of 3- and 6-months. Most droughts tend to occur for periods shorter than three months, but a few can extend up to one year and fewer even longer. However, if a multiyear drought experienced breaks, each period would be considered a separate case. Analysis of the frequency distribution indicates that cases of water deficit conditions are more common than instances of water excess. As relevant as the drought duration is its timing and severity. Even short dry spells may have large impacts if they occur at the time of the critical growth period of a given crop. In the core crop region, corn yield is the most sensitive to drought severity. For these reasons, the quantification of severity during the crop-sensitive months is an indicator of what crop yields could be on the next campaign. [ABSTRACT FROM AUTHOR] more...
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- 2020
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10. ASSOCIAÇÕES ENTRE A ZONA DE CONVERGÊNCIA DO ATLÂNTICO SUL E O EL NIÑO E SUA INFLUÊNCIA SOBRE A DISTRIBUIÇÃO ESPAÇOTEMPORAL DA LEPTOSPIROSE EM MINAS GERAIS
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Lacerda Suassuna Dutra, Flávia Regina, primary, Leal de Quadro, Mário Francisco, additional, Müller, Gabriela Viviana, additional, and Valadão, Roberto Célio, additional
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- 2018
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11. Patrones atmosféricos simulados en el clima presente y futuro asociados al descenso de temperatura en el sudeste de Sudamerica
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da Rocha Repinaldo, Cintia Rabelo, Müller, Gabriela Viviana, Martins Andrade, Kelen, da Rocha Repinaldo, Cintia Rabelo, Müller, Gabriela Viviana, and Martins Andrade, Kelen
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The atmospheric features associated with extreme cold events, identified by the temperature drop in the winter, in three regions of southeastern South America are analyzed with reanalysis data from NCEP / NCAR as well as simulations of the coupled ocean-atmosphere HadCM3 and GFDL-CM2.0 models for the present and CMIP3 A2 future scenario. In the present climate, GFDL-CM2.0 represents better the reanalysis fields, being more coherent with the post-frontal high pressure and the 0°C and better the reanalysis fields, being more coherent with the post-frontal high pressure and the 0°C and10°C isotherms. For the future climate, GFDL-CM2.0 projects weakening of temperature anomalies and lower advance of the extreme events of temperature drop in direction to the Equator, while the HadCM3 projection also indicates lower latitudinal range, but in general, higher intensity of these events., Las características atmosféricas asociadas a eventos extremos fríos, identificados a partir del descenso de la temperatura en el invierno en tres regiones en el sudeste de Sudamérica, son analizadas con datos de reanálisis NCEP/NCAR y simulaciones de los modelos HadCM3 y GFDL-CM2.0 en la versión acoplada océano-atmósfera, para el clima presente y el escenario futuro más crítico A2 del CMIP3. Para las simulaciones del clima presente, el modelo que mejor representó las características observadas en el conjunto del reanálisis fue el GFDL-CM2.0, presentándose más coherente con relación a las posiciones de las altas pos frontales y de las isotermas de 0°C y 10°C. Para el futuro, el modelo GFDL-CM2.0 proyecta un debilitamiento de las anomalías negativas de temperatura y los eventos extremos de caída de temperatura con menos avance en dirección al Ecuador, mientras que, según el modelo HadCM3, la simulación para el futuro también apunta hacia una menor proyección con dirección al Ecuador pero, en general, a eventos más intensos. more...
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- 2017
12. Energetics of wave propagation leading to cold event in tropical latitudes of South America
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Müller, Gabriela Viviana, primary, Gan, Manoel Alonso, additional, Piva, Everson Dal, additional, and Silveira, Virginia Piccinini, additional
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- 2015
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13. Interannual variability of the frequency of frost occurrence in Pampa húmeda and its relationship with the associated atmospheric circulation
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Müller, Gabriela Viviana, Nuñez, Mario N., and Ambrizzi, Tercio
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SEASONAL FREQUENCY ,CIRCULACION REGIONAL ,ENOS ,HELADAS ,TELECONEXION TROPICOS-EXTRATROPICOS ,ONDAS DE ROSSBY ESTACIONARIAS ,REGIONAL ATMOSPHERIC CIRCULATION ,FROSTS ,GENERALIZED EVENTS ,EVENTOS GENERALIZADOS ,STATIONARY ROSSBY WAVES ,FRECUENCIA ESTACIONAL ,ENSO ,TROPICS-EXTRATROPICS TELECONNECTION ,VARIABILIDAD INTERANUAL E INTERESTACIONAL ,PAMPA HUMEDA ,INTERANNUAL AND INTERSEASONAL VARIABILITY - Abstract
Las irrupciones de aire frío más intensas en el sur de Sudamérica están acompañadas por importantes cambios en la circulación atmosférica en toda la tropósfera, tanto a escala sinóptica como hemisférica; dichos cambios se manifiestan en alta y baja frecuencia como consecuencia de la variabilidad interanual e interestacional. En este trabajo se analiza el rol que ellas tienen en la modulación de los aspectos de gran escala vinculados a las incursiones de aire frío que provocan heladas en la Pampa Húmeda, con un enfoque principalmente espacial. Las características de la circulación atmosférica regional y global asociadas a las heladas se abordan desde una perspectiva tanto sinóptica como climática. El estudio está basado en la temperatura mínima de las estaciones meteorológicas situadas en el centro-este de Argentina de los años 1961-1990, para lo cual se identifican y clasifican las heladas en tres categorías: aisladas, parciales y generalizadas. Asimismo, se definen los períodos de máxima y mínima frecuencia de ocurrencia de las heladas en sus distintas categorías, examinando las diferencias en la circulación entre ambos casos extremos a nivel estacional y mensual, utilizando los reanálisis de NCEP/NCAR. En particular se estudia la generación y evolución de los eventos de heladas generalizadas (HG) durante el invierno y a partir de los resultados surgidos del análisis observacional se proponen los mecanismos físicos responsables, los que son validados mediante simulaciones numéricas empleando un modelo baroclínico de circulación global. Por otra parte, escogiendo los episodios más representativos espacialmente - heladas parciales y generalizadas-, se realiza una caracterización de las situaciones en superficie de acuerdo a la frecuencia de ocurrencia de los tipos sinópticos principales que las representan. Esta clasificación se realiza para la totalidad de los inviernos y para los años El Niño, La Niña y Neutro del mismo período, empleando las observaciones de presión en superficie de las estaciones meteorológicas del cono sur del continente y los océanos adyacentes. Gran parte de la variabilidad interanual de la circulación del hemisferio sur está relacionada con los cambios en la convección tropical asociada al ENOS, como así también una importante componente de la variabilidad intraestacional está vinculada a la convección tropical. Se comprueba que la variabilidad interanual en la frecuencia de ocurrencia de heladas está condicionada al menos en parte, por la ocurrencia de las fases cálida y fría del ENOS, con un mayor (menor) número de heladas durante La Niña (El Niño). En particular el estado básico de máxima frecuencia de ocurrencia de HG, representado por el promedio de los inviernos respectivos, muestra características coincidentes con los años La Niña, junto con una mayor actividad convectiva en el Pacífico tropical occidental. Mediante simulaciones numéricas se examina el rol de la convección tropical cuya respuesta es la propagación de ondas de Rossby extratropicales que constituyen un mecanismo importante en la generación de HG. La mayor o menor frecuencia de ocurrencia de las HG está condicionada por el flujo básico en el cual se propagan dichas ondas. Los inviernos de máxima frecuencia de ocurrencia de tales eventos están caracterizados por un estado básico que acentúa el rol del jet subtropical y polar como eficientes guías de ondas. Ellas se generan en lugares remotos que están determinados por el flujo básico y se propagan en trayectorias zonales a lo largo de ambos jets, los que alcanzan una gran extensión longitudinal hasta las proximidades del continente. Al acercarse al mismo, las fases de ambos trenes de onda coinciden en el momento previo a los eventos más conspicuos de HG, provocando una sostenida y marcada advección de aire polar sobre todo el cono sur, reforzada por una anomalía ciclónica extendida meridionalmente en el Atlántico Sur frente a la costa. La mayor persistencia del evento está en relación directa con la intensidad de la anomalía anticiclónica sobre Sudamérica y el carácter cuasi-estacionario que la misma alcanza. En cambio los eventos de menor persistencia muestran un patrón de propagación con un único tren de ondas que alcanza América del Sur. La anomalía anticiclónica que afecta el continente junto a la ciclónica corriente abajo, siguen una trayectoria en forma de arco conforme el sistema evoluciona hacia el noreste a sotavento de los Andes. En el estado básico representado por los inviernos de mínima frecuencia de ocurrencia de HG no aparece un definido jet polar, a lo que se suma el hecho que la propagación de las ondas de Rossby está inhibida en particular en la región preferencial de ingreso de los sistemas sinópticos al continente Sudamericano. Estas diferencias entre ambos estados básicos se traducen en una mayor o menor ocurrencia de HG y a su vez explican la generación de los eventos más frecuentes y persistentes. The most intense cold surges in South America are accompanied by important changes in the synoptic and hemispheric scale atmospheric circulation throughout the entire troposphere. These changes are evidenced as high and low frequency variations as a consequence of the seasonal and interannual variability, whose role in modulating the large scale features associated to the cold surges over the Pampa Húmeda is studied mainly from a spatial distribution point of view. A synoptic as well as a climatic perspective are applied to the study of the regional and global scale atmospheric circulation features. The study is based on the minimum temperature from the weather stations on central-east Argentina during the period 1961-1990, from which the frost events are identified and classified in three categories: isolated, partial and generalized frosts. Also, the periods of maximum and minimum frequency of frosts of the three categories are defined, and the differences in the atmospheric circulation between the two extremes are examined on a monthly and seasonal time scale by using the NCEP/NCAR reanalysis. In particular, the study focuses on the development and evolution of generalized frosts (GF) during wintertime, and based on the results of the observational study, their physical mechanism is proposed and tested by means of numerical simulations with a baroclinic general circulation model. By choosing the most representative cases in terms of spatial distribution, i.e. partial and generalized frosts, the surface weather situations are characterized according to the frequency of occurrence of the main synoptic patterns that represent the frosts. The classification is made for the winters of the entire period as well as those of El Niño, La Niña and Neutral years based on the sea level atmospheric pressure from the weather stations over the southern cone of the continent and the adjacent oceans. A large portion of the interannual variability in the southern hemisphere atmospheric circulation is associated to changes in ENSO-related tropical convection, just as a significant component of the intraseasonal variability is associated to tropical convection. It is found that the interannual variability of frost frequency is in part conditioned by the ENSO phases, since there is a larger (smaller) number of frosts during La Niña (El Niño) events. In particular the basic state of maximum GF frequency, represented by the respective averaged winter, shows similar characteristics to La Niña years, as well as enhanced convective activity over the western tropical Pacific Ocean. The role of tropical convection is examined by means of the numerical simulations, whose response is the propagation of extratropical Rossby waves that become an important mechanism for generating GF. The basic state flow, through which the Rossby waves propagate, is the one that determines a larger or smaller number of frosts. Winters with maximum frost frequency are characterized by a basic state flow that highlights the role of the subtropical and polar jets as efficient wave guides. Rossby waves are generated remotely at locations determined by the basic state and they propagate through zonal trajectories along both jets, which show large longitudinal extensions that reach the proximities of the continent. When approaching the continent, the phases of both wave trains coincide immediately before the most conspicuous GF events, giving rise to sustained polar air advection all over the southern cone, reinforced by a cyclonic anomaly located off the coast over the South Atlantic Ocean, with a large meridional extension. The persistence of frost events is in direct relationship to the intensity of the anticyclonic anomaly over South America and its cuasi-stationary degree. Instead, the less persistent events display a Rossby wave propagation pattern with only one wave train reaching South America. The anticyclonic anomaly that affects the continent, together with the cyclonic anomaly located downstream, both move to the northeast leeward to the Andes mountains. The basic state corresponding to winters with minimum frost frequency does not show a well-defined polar jet, in addition to which there are regions that inhibit the Rossby wave propagation, in particular one is located in the preferred region where the synoptic systems enter the continent. The differences between the two basic states translate into larger or smaller frost frequencies and at the same time they explain the development of the most frequent and most persistent frost events. Fil: Müller, Gabriela Viviana. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. more...
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- 2005
14. Long-term and recent changes in temperature-based agroclimatic indices in Argentina
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Fernández-Long, María Elena, primary, Müller, Gabriela Viviana, additional, Beltrán-Przekurat, Adriana, additional, and Scarpati, Olga Eugenia, additional
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- 2012
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15. RELACIÓN ENTRE LA TEMPERATURA DE LA SUPERFICIE DEL MAR DE DIFERENTES OCÉANOS Y LOS RENDIMIENTOS DE MAÍZ EN LA PAMPA HÚMEDA.
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Müller, Gabriela Viviana, Fernández Long, María Elena, and Bosch, Ezequiel
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The sea surface temperature anomalies (SST) are closely related to the precipitation anomalies in central and eastern Argentina and therefore they are related to some crops in the Argentine Pampa region as well. The objective of this paper is to analyze the relationship between SST in the Pacific, Atlantic and Indian Oceans and maize yields in the Pampa region. It is found that maize yields respond in different ways to the SST variability, except for the south, southeast and west of Buenos Aires province and the east of the La Pampa province, where the signal is either weak or nonexistent. It is also found that some oceanic regions have a significant influence over the rest of the Pampa region, in particular the subtropical Pacific Ocean, the equatorial Pacific Ocean ENSO region, the Indian Ocean dipole (IOD) and the tropical and subtropical western Atlantic Ocean mainly in the spring and in some cases in the fall. [ABSTRACT FROM AUTHOR] more...
- Published
- 2015
16. Long-term and recent changes in temperature-based agroclimatic indices in Argentina.
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Fernández‐Long, María Elena, Müller, Gabriela Viviana, Beltrán‐Przekurat, Adriana, and Scarpati, Olga Eugenia
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AGRICULTURAL climatology , *CLIMATE change , *TEMPERATURE - Abstract
ABSTRACT Changes in several temperature-based agroclimatic indices in the central-eastern of Argentina, most of them located within the Pampas region were analysed for 39 meteorological stations. Trends of first (FFD), last (LFD) and number (NFD) of frost days, frost period (FP), start (SGS), end (EGS) and length (LGS) of the growing season, growing degree days (GDD), diurnal temperature range (DTR), chilling hours and lowest annual minimum temperature were computed for two periods, 1940-2007 and 1975-2007. The largest changes were observed for the whole period 1940-2007 and were mostly indicative of a long-term minimum temperature warming throughout the region. During this period, generalized decreases in the NFD and in the FP (i.e., a delayed FFD and an earlier LFD) were found. Although the trends in the growing season indices were not as large as in the frost indices, they were consistent with the overall warming: an earlier SGS and a delayed in the EGS. The trends of the GDD showed a large variability between months with a generalized increased throughout the year. The DTR showed the largest number of stations with statistically significant negative trends from austral late spring (November) to austral early fall (April). For the period 1975-2007, the behaviour changes in all analysed indices: the short-term trends weakened and in some cases reversed sign. The LFD tended to occurred later in the year, particularly for the southern Pampas. The EGS shifted from mostly positive to negative trends, resulting in a shorter LGS. These trend changes were not spatially homogeneous. Although those short-term trends were predominantly non-statistically significant, they could potential affect management decisions and crop yields. In particular, frost is still an important hazard in agricultural activities and within the context of our results short- and long-term characterization of frost risk need to be considered at local and sub-regional scales. Copyright © 2012 Royal Meteorological Society [ABSTRACT FROM AUTHOR] more...
- Published
- 2013
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17. Patterns leading to extreme events in Argentina: partial and generalized frosts.
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Müller, Gabriela Viviana
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ATMOSPHERIC circulation , *FROST , *METEOROLOGICAL stations , *CLIMATOLOGY , *ICE , *AIR masses , *TRADE winds , *THAWING - Abstract
The article presents a study on the atmospheric circulation associated with frosts in the central region of Argentina. The goal of this research is to enhance the prediction capacity for these natural events. Relative to this, frosts are selected according to spatial principle, which takes into account those events influencing an area above 25% of the weather stations situated in the region called Wet Pampas. Moreover, the mean circulation patterns analyzed from the composites of various meteorological variables explain the temperature anomalies observed in the region. more...
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- 2007
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18. Predictive models of minimum temperature for Bahía Blanca, province of Buenos Aires
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Hernández, Gabriela Lorena and Müller, Gabriela Viviana
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Dado que las heladas se identifican a partir de la temperatura mínima del aire, el objetivo de este trabajo es presentar modelos de pronóstico a 1, 3 y 5 días de la temperatura mínima (Tmin) diaria para la ciudad de Bahía Blanca. Se trabaja con modelos de regresión lineal múltiple y con modelos numéricos no lineales tales como redes neuronales y elementos finitos. Las variables predictoras son: temperatura y temperatura del punto de rocío a nivel de abrigo, humedad relativa, nubosidad observada en la estación y dirección y velocidad del viento medido a 10 metros de altura, observadas en las cuatro observaciones diarias de las 03, 09, 15 y 21 hora local de la estación meteorológica de Bahía Blanca Aero. El período seleccionado es mayo a septiembre de 1956 a 2015 con las 6 variables mencionadas. El análisis se repite utilizando 4 variables predictoras (temperatura, temperatura de punto de rocío, intensidad de viento y nubosidad), considerando no solamente el período mayo a septiembre, sino también las distintas temporadas del año en forma separada: otoño (marzo-mayo), invierno (junio-agosto) y primavera (setiembre-noviembre) en base a información de un período reducido de 9 años (2007-2015). Se busca con esto evaluar la "performance" de los modelos utilizando una menor cantidad de información, y a su vez extendiendo el análisis a aquellos meses de mayor susceptibilidad para los cultivos. Para la selección del modelo más adecuado se evalúan el coeficiente de correlación de Pearson (R), el coeficiente de determinación (R²) y el Error Absoluto Medio (EAM). Los resultados del estudio determinan que el modelo de elementos finitos con 4 variables, 9 años de datos y separado por estación del año es el más ventajoso para el pronóstico de Tmin de hasta con 5 días de anticipación, con la ventaja que se emplean solamente observaciones locales. Given that frosts are identified from the minimum temperature, the objective of this study is to present 1, 3 and 5-day forecast models of minimum temperature (Tmin) for the city of Bahía Blanca, using multiple linear regression models and nonlinear numerical models such as neural networks and finite elements. The predictors are temperature, dew point temperature, relative humidity, cloudiness and 10-meter wind direction and wind speed of four daily observations at 03, 09, 15 and 21 (local time), of Bahía Blanca Aero weather station. The selected period is May to September from 1956 to 2015 with the 6 above mentioned variables. The analysis is repeated using 4 predictor variables (temperature, dew point temperature, wind intensity and cloudiness), considering not only the May-September period, but also the different seasons of the year separately: autumn (March-May), winter (June-August) and spring (September-November) based on information from a reduced period of 9 years (2007-2015). The aim is to evaluate the "performance" of the models using a smaller amount of information, and at the same time extending the analysis to those months of greater susceptibility for the crops. The selection of the most adequate model is based on the evaluation of the Pearson correlation coefficient (R), the coefficient of determination (R²) and the Mean Absolute Error (EAM). The results of the study determine that the finite element model with 4 variables, 9 years of data and separated by season of the year, provides the best 5-day Tmin forecast, with the particular advantage that it requires only local observations. Fil: Hernández, Gabriela Lorena. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. more...
- Published
- 2019
19. Nuevas herramientas para el estudio de la dispersión atmosférica de contaminantes en regiones de fuerte contraste térmico horizontal. Caso de estudio en la zona del río Uruguay en inmediaciones de Gualeguaychú
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Orcellet, Emiliana Elisabet, Berri, Guillermo Jorge, and Müller, Gabriela Viviana
- Subjects
MODELADO NUMÉRICO ,CONTAMINACIÓN ATMOSFÉRICA ,REGIÓN COSTERA ,PRODUCTO QUÍMICO ,DISPERSIÓN ATMOSFÉRICA - Abstract
Tesis de Doctorado en Ciencia y Tecnología Mención Química El objetivo general del trabajo es el desarrollo de una nueva herramienta de modelado numérico para ser utilizada en estudios de dispersión atmosférica de contaminantes a escala regional sobre zonas ribereñas de fuerte contraste térmico horizontal, la que se adapta a la región del río Uruguay en inmediaciones de la localidad Gualeguaychú, Provincia de Entre Ríos. Para ello se emplea el modelo Advanced Regional Prediction System (ARPS), acoplado al Modelo de Capa Límite en Mesoescala (MCLM), y se realiza una validación de la misma empleando la información disponible de la zona. Se modelan once eventos de mal olor que tuvieron lugar entre septiembre y diciembre de 2009, atribuidos a las emisiones de azufre total reducido (TRS) de una fábrica de pasta de celulosa de la zona, que motivaron la intervención del municipio local. Nueve de los once eventos simulados resultan exitosos ya que coincide la posición de la pluma modelada en relación al lugar de la denuncia, con el resultado de la constatación de la misma. El empleo de otro modelo de dispersión, con el objeto de realizar una validación independiente, da coincidencia de resultados en más de la mitad de los casos. Se incorpora además un modelo de reacciones químicas para el cálculo de la concentración de sulfuro de hidrógeno, componente mayoritario de los compuestos TRS, resultando que en los casos estudiados el índice de olor calculado supera el umbral de detección en los puntos de las denuncias. Fil: Orcellet, Emiliana Elisabet. Universidad Nacional de San Martín. Instituto de Investigaciones e Ingeniería Ambiental; Buenos Aires, Argentina more...
- Published
- 2016
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