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Papers by Nair da Silveira Pereira

Research paper thumbnail of Meteorological Signal on Hydrodynamics in the Ilha Grande and Sepetiba Bays: Lag Effects and Coastal Currents

Research paper thumbnail of Meteorological Signal on Hydrodynamics in the Ilha Grande and Sepetiba Bays: Lag Effects and Coastal Currents

Research paper thumbnail of Analysis of Correlations Between Meteorology, Hydrodynamics and Primary Production in the South and Tropical Atlantic, Through Numerical Modeling and Remote Sensing

Research paper thumbnail of Análise de parâmetros hidrodinâmicos e da clorofila a no Atlântico Sul e Tropical a partir de modelagem numérica e observações remotas

Primeiramente agradeço a todo IOUSP, minha segunda casa. Repleto de pessoas fantásticas que, não ... more Primeiramente agradeço a todo IOUSP, minha segunda casa. Repleto de pessoas fantásticas que, não cabem nesse documento, mas que sabem como fizeram diferença em minha vida. A todos os funcionários que sempre me apoiaram em todos os momentos; em especial à Vanilde que, é capaz de parar seja lá o que estiver fazendo para auxiliar a todos. Aos professores que me ensinaram tanto e me fizeram entender o quanto eu não sei. Em especial agradeço ao professor Ricardo de Camargo pelo auxilio nesse trabalho e, é claro ao professor Joseph Harari por toda a dedicação e paciência infinita! Agradeço a todos os parceiros e amigos do LabSIP, à minha turma de mestrado, amigos da graduação e, da vida que estiveram sempre tão presentes (cada um do seu jeito particular) de forma que, sempre que pensasse que estava só me mostravam que estavam sempre ali para me apoiar. Em especial, agradeço à Cecilia que joga todos os seus problemas de lado e jamais esquece o significado da palavra "amigo", dedicando-se ao máximo para te mostrar que você é especial exatamente pelo que é. Agradeço à CAPES pelo auxilio financeiro que propiciou a realização desse trabalho. Agradeço o apoio de toda a minha família (me perco de tão grande!), sempre

Research paper thumbnail of Analysis of the influence of ENSO phenomena on wave climate on the central coastal zone of Rio de Janeiro (Brazil)

Gestão costeira integrada, Aug 1, 2015

Dissertation presented to COPPE/UFRJ as a partial fulfillment of the requirements for the degree ... more Dissertation presented to COPPE/UFRJ as a partial fulfillment of the requirements for the degree of Master of Science (M.Sc.

Research paper thumbnail of Comparative study of meteorology, hydrodynamics and primary production in south and tropical atlantic ocean through numerical modeling and remote sensing

Research paper thumbnail of Detection of Variabilities and Trends in the Tropical and South Atlantic Ocean Using Hydrodynamic Numerical Modeling

Journal of Waste Water Treatment and Analysis, 2016

Research paper thumbnail of Comparative study of meteorology, hydrodynamics and primary production in south and tropical atlantic ocean through numerical modeling and remote sensing

Research paper thumbnail of Correlations of remote sensed chlorophyll-a data and results of numerical model of the Tropical and South Atlantic Ocean circulation

Journal of Earth Science & Climatic Change, Nov 18, 2013

T he South and Tropical Atlantic Ocean is characterized by important large scale features that ha... more T he South and Tropical Atlantic Ocean is characterized by important large scale features that have seasonal character. The interactions between atmospheric and oceanic phenomena compose a complex system where variations in physical parameters affect the distribution of chlorophyll; for example, upwelling driven by seasonal winds cause increase in the biological productivity in the region of Cabo Frio-23°S 41.5°W. Previous studies showed that physical variables display high values of cross-correlation with chlorophyll-a, with strong dependence of latitude and variability in the biological response time. This study aims to correlate data of chlorophyll-a from MODIS with the results of a hydrodynamical numercial model. The annual and semiannual signals are predominant both in MODIS and model data but, even excluding these components, the correlations are still high. As an example, cross-correlations showed an inverse and instantaneous response of the biological variable to the sea surface temperature in the equatorial region; the Fourier analysis of chlorophyll-a showed a strong signal with period of 2.34 years in the equatorial region, stressing that the source of variability of chlorophyll-a in this region is not restricted to phenomena with seasonal character; but this signal is not evident in the series of the sea surface temperature. Biography Nair Emmanuela Pereira da Silveira graduated in Oceanography at the Oceanographic Institute of the University of Sao Paulo (SP, Brazil) in 2009 and is currently completing her M.Sc. Program in Physical Oceanography, with researches on large scale numerical modeling of physical and biological parameters of the ocean.

Research paper thumbnail of Correlations of remote sensed chlorophyll-a data and results of numerical model of the Tropical and South Atlantic Ocean circulation

Journal of Earth Science & Climatic Change, Nov 18, 2013

Research paper thumbnail of Analysis of Correlations Between Meteorology, Hydrodynamics and Primary Production in the South and Tropical Atlantic, Through Numerical Modeling and Remote Sensing

Proceedings of Safety, Health and Environment World Congress, Mar 1, 2014

Research paper thumbnail of Correlations of Remote Sensing Chlorophyll-a Data and Results of A Numerical Model of the Tropical and South Atlantic Ocean Circulation

Journal of Geology & Geosciences, 2014

Research paper thumbnail of Detection of Variabilities and Trends in the Tropical and South Atlantic Ocean Using Hydrodynamic Numerical Modeling

Journal of Waste Water Treatment & Analysis, 2016

Research paper thumbnail of Análise de parâmetros hidrodinâmicos e da clorofila a no Atlântico Sul e Tropical a partir de modelagem numérica e observações remotas

Primeiramente agradeço a todo IOUSP, minha segunda casa. Repleto de pessoas fantásticas que, não ... more Primeiramente agradeço a todo IOUSP, minha segunda casa. Repleto de pessoas fantásticas que, não cabem nesse documento, mas que sabem como fizeram diferença em minha vida. A todos os funcionários que sempre me apoiaram em todos os momentos; em especial à Vanilde que, é capaz de parar seja lá o que estiver fazendo para auxiliar a todos. Aos professores que me ensinaram tanto e me fizeram entender o quanto eu não sei. Em especial agradeço ao professor Ricardo de Camargo pelo auxilio nesse trabalho e, é claro ao professor Joseph Harari por toda a dedicação e paciência infinita! Agradeço a todos os parceiros e amigos do LabSIP, à minha turma de mestrado, amigos da graduação e, da vida que estiveram sempre tão presentes (cada um do seu jeito particular) de forma que, sempre que pensasse que estava só me mostravam que estavam sempre ali para me apoiar. Em especial, agradeço à Cecilia que joga todos os seus problemas de lado e jamais esquece o significado da palavra "amigo", dedicando-se ao máximo para te mostrar que você é especial exatamente pelo que é. Agradeço à CAPES pelo auxilio financeiro que propiciou a realização desse trabalho. Agradeço o apoio de toda a minha família (me perco de tão grande!), sempre

Research paper thumbnail of Analysis of the influence of ENSO phenomena on wave climate on the central coastal zone of Rio de Janeiro (Brazil)

Revista de Gestão Costeira Integrada, 2015

This paper evaluates the influence of the El Niño-Southern Oscillation on the wave climate variab... more This paper evaluates the influence of the El Niño-Southern Oscillation on the wave climate variability in the central region of Rio de Janeiro's coastal zone. The regional climate of the area was characterized using the WAVEWATCH III wave data model, obtained from NOAA, organized as a 35 year time series (1979-2013). These data were validated for the study area and a characterization and analysis performed by focusing on years with occurrence of strong El Niño/La Niña events. The correlation between the interannual variability of significant wave height and Oceanic Niño Index showed a slight reduction in significant wave height during El Niño years and the opposite pattern during La Niña years, with a lag of four months. This decrease could be attributed to the intensification of the South Atlantic High with a corresponding increase in the occurrence of subtropical jets during periods of El Niño. This weather change causes the blocking of cold fronts in the southern region of Brazil and the consequent reduction in the percentage of waves from the south along the southeast coast.

Research paper thumbnail of Analysis of the influence of ENSO phenomena on wave climate on the central coastal zone of Rio de Janeiro (Brazil)

This paper evaluates the influence of the El Niño-Southern Oscillation on the wave climate variab... more This paper evaluates the influence of the El Niño-Southern Oscillation on the wave climate variability in the central region of Rio de Janeiro's coastal zone. The regional climate of the area was characterized using the WAVEWATCH III wave data model, obtained from NOAA, organized as a 35 year time series (1979-2013). These data were validated for the study area and a characterization and analysis performed by focusing on years with occurrence of strong El Niño/La Niña events. The correlation between the interannual variability of significant wave height and Oceanic Niño Index showed a slight reduction in significant wave height during El Niño years and the opposite pattern during La Niña years, with a lag of four months. This decrease could be attributed to the intensification of the South Atlantic High with a corresponding increase in the occurrence of subtropical jets during periods of El Niño. This weather change causes the blocking of cold fronts in the southern region of Brazil and the consequent reduction in the percentage of waves from the south along the southeast coast.

Research paper thumbnail of Morfodinâmica Multitemporal Em Praia Refletiva No Litoral Centro-Norte Do RJ, Em Resposta Ao Clima De Ondas Regional

Revista Brasileira de Geomorfologia, 2015

O artigo avalia a relação da morfodinâmica da praia do Lagomar, Macaé -RJ, com o clima de ondas r... more O artigo avalia a relação da morfodinâmica da praia do Lagomar, Macaé -RJ, com o clima de ondas regional e local do RJ, obtido através de resultados de simulações do modelo Wavewatch III, disponíveis para os anos de 1990-2009. Para tanto, foram avaliados três pontos de saídas de dados de ondas próximos à costa, sob diferentes graus de exposição, e seus resultados foram validados com dados medidos em campo por boia oceanográfi ca fundeada nas proximidades de Arraial do Cabo. Posteriormente, o comportamento das ondas foi relacionado com a morfologia da praia, a partir da análise de 41 perfi s topográfi cos analisados em multiescala temporal (1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004). Os resultados apontaram boa correlação do modelo com dados reais de altura e período de ondas para a costa do RJ e boa correlação entre as variações de energia de onda e as variações de volume no perfi l da praia ao longo da escala temporal avaliada.

Research paper thumbnail of A Numerical Model of the Tropical and South Atlantic Ocean Circulation

Journal of Geology & Geosciences, 2014

Research paper thumbnail of Meteorological Signal on Hydrodynamics in the Ilha Grande and Sepetiba Bays: Lag Effects and Coastal Currents

Research paper thumbnail of Meteorological Signal on Hydrodynamics in the Ilha Grande and Sepetiba Bays: Lag Effects and Coastal Currents

Research paper thumbnail of Analysis of Correlations Between Meteorology, Hydrodynamics and Primary Production in the South and Tropical Atlantic, Through Numerical Modeling and Remote Sensing

Research paper thumbnail of Análise de parâmetros hidrodinâmicos e da clorofila a no Atlântico Sul e Tropical a partir de modelagem numérica e observações remotas

Primeiramente agradeço a todo IOUSP, minha segunda casa. Repleto de pessoas fantásticas que, não ... more Primeiramente agradeço a todo IOUSP, minha segunda casa. Repleto de pessoas fantásticas que, não cabem nesse documento, mas que sabem como fizeram diferença em minha vida. A todos os funcionários que sempre me apoiaram em todos os momentos; em especial à Vanilde que, é capaz de parar seja lá o que estiver fazendo para auxiliar a todos. Aos professores que me ensinaram tanto e me fizeram entender o quanto eu não sei. Em especial agradeço ao professor Ricardo de Camargo pelo auxilio nesse trabalho e, é claro ao professor Joseph Harari por toda a dedicação e paciência infinita! Agradeço a todos os parceiros e amigos do LabSIP, à minha turma de mestrado, amigos da graduação e, da vida que estiveram sempre tão presentes (cada um do seu jeito particular) de forma que, sempre que pensasse que estava só me mostravam que estavam sempre ali para me apoiar. Em especial, agradeço à Cecilia que joga todos os seus problemas de lado e jamais esquece o significado da palavra "amigo", dedicando-se ao máximo para te mostrar que você é especial exatamente pelo que é. Agradeço à CAPES pelo auxilio financeiro que propiciou a realização desse trabalho. Agradeço o apoio de toda a minha família (me perco de tão grande!), sempre

Research paper thumbnail of Analysis of the influence of ENSO phenomena on wave climate on the central coastal zone of Rio de Janeiro (Brazil)

Gestão costeira integrada, Aug 1, 2015

Dissertation presented to COPPE/UFRJ as a partial fulfillment of the requirements for the degree ... more Dissertation presented to COPPE/UFRJ as a partial fulfillment of the requirements for the degree of Master of Science (M.Sc.

Research paper thumbnail of Comparative study of meteorology, hydrodynamics and primary production in south and tropical atlantic ocean through numerical modeling and remote sensing

Research paper thumbnail of Detection of Variabilities and Trends in the Tropical and South Atlantic Ocean Using Hydrodynamic Numerical Modeling

Journal of Waste Water Treatment and Analysis, 2016

Research paper thumbnail of Comparative study of meteorology, hydrodynamics and primary production in south and tropical atlantic ocean through numerical modeling and remote sensing

Research paper thumbnail of Correlations of remote sensed chlorophyll-a data and results of numerical model of the Tropical and South Atlantic Ocean circulation

Journal of Earth Science & Climatic Change, Nov 18, 2013

T he South and Tropical Atlantic Ocean is characterized by important large scale features that ha... more T he South and Tropical Atlantic Ocean is characterized by important large scale features that have seasonal character. The interactions between atmospheric and oceanic phenomena compose a complex system where variations in physical parameters affect the distribution of chlorophyll; for example, upwelling driven by seasonal winds cause increase in the biological productivity in the region of Cabo Frio-23°S 41.5°W. Previous studies showed that physical variables display high values of cross-correlation with chlorophyll-a, with strong dependence of latitude and variability in the biological response time. This study aims to correlate data of chlorophyll-a from MODIS with the results of a hydrodynamical numercial model. The annual and semiannual signals are predominant both in MODIS and model data but, even excluding these components, the correlations are still high. As an example, cross-correlations showed an inverse and instantaneous response of the biological variable to the sea surface temperature in the equatorial region; the Fourier analysis of chlorophyll-a showed a strong signal with period of 2.34 years in the equatorial region, stressing that the source of variability of chlorophyll-a in this region is not restricted to phenomena with seasonal character; but this signal is not evident in the series of the sea surface temperature. Biography Nair Emmanuela Pereira da Silveira graduated in Oceanography at the Oceanographic Institute of the University of Sao Paulo (SP, Brazil) in 2009 and is currently completing her M.Sc. Program in Physical Oceanography, with researches on large scale numerical modeling of physical and biological parameters of the ocean.

Research paper thumbnail of Correlations of remote sensed chlorophyll-a data and results of numerical model of the Tropical and South Atlantic Ocean circulation

Journal of Earth Science & Climatic Change, Nov 18, 2013

Research paper thumbnail of Analysis of Correlations Between Meteorology, Hydrodynamics and Primary Production in the South and Tropical Atlantic, Through Numerical Modeling and Remote Sensing

Proceedings of Safety, Health and Environment World Congress, Mar 1, 2014

Research paper thumbnail of Correlations of Remote Sensing Chlorophyll-a Data and Results of A Numerical Model of the Tropical and South Atlantic Ocean Circulation

Journal of Geology & Geosciences, 2014

Research paper thumbnail of Detection of Variabilities and Trends in the Tropical and South Atlantic Ocean Using Hydrodynamic Numerical Modeling

Journal of Waste Water Treatment & Analysis, 2016

Research paper thumbnail of Análise de parâmetros hidrodinâmicos e da clorofila a no Atlântico Sul e Tropical a partir de modelagem numérica e observações remotas

Primeiramente agradeço a todo IOUSP, minha segunda casa. Repleto de pessoas fantásticas que, não ... more Primeiramente agradeço a todo IOUSP, minha segunda casa. Repleto de pessoas fantásticas que, não cabem nesse documento, mas que sabem como fizeram diferença em minha vida. A todos os funcionários que sempre me apoiaram em todos os momentos; em especial à Vanilde que, é capaz de parar seja lá o que estiver fazendo para auxiliar a todos. Aos professores que me ensinaram tanto e me fizeram entender o quanto eu não sei. Em especial agradeço ao professor Ricardo de Camargo pelo auxilio nesse trabalho e, é claro ao professor Joseph Harari por toda a dedicação e paciência infinita! Agradeço a todos os parceiros e amigos do LabSIP, à minha turma de mestrado, amigos da graduação e, da vida que estiveram sempre tão presentes (cada um do seu jeito particular) de forma que, sempre que pensasse que estava só me mostravam que estavam sempre ali para me apoiar. Em especial, agradeço à Cecilia que joga todos os seus problemas de lado e jamais esquece o significado da palavra "amigo", dedicando-se ao máximo para te mostrar que você é especial exatamente pelo que é. Agradeço à CAPES pelo auxilio financeiro que propiciou a realização desse trabalho. Agradeço o apoio de toda a minha família (me perco de tão grande!), sempre

Research paper thumbnail of Analysis of the influence of ENSO phenomena on wave climate on the central coastal zone of Rio de Janeiro (Brazil)

Revista de Gestão Costeira Integrada, 2015

This paper evaluates the influence of the El Niño-Southern Oscillation on the wave climate variab... more This paper evaluates the influence of the El Niño-Southern Oscillation on the wave climate variability in the central region of Rio de Janeiro's coastal zone. The regional climate of the area was characterized using the WAVEWATCH III wave data model, obtained from NOAA, organized as a 35 year time series (1979-2013). These data were validated for the study area and a characterization and analysis performed by focusing on years with occurrence of strong El Niño/La Niña events. The correlation between the interannual variability of significant wave height and Oceanic Niño Index showed a slight reduction in significant wave height during El Niño years and the opposite pattern during La Niña years, with a lag of four months. This decrease could be attributed to the intensification of the South Atlantic High with a corresponding increase in the occurrence of subtropical jets during periods of El Niño. This weather change causes the blocking of cold fronts in the southern region of Brazil and the consequent reduction in the percentage of waves from the south along the southeast coast.

Research paper thumbnail of Analysis of the influence of ENSO phenomena on wave climate on the central coastal zone of Rio de Janeiro (Brazil)

This paper evaluates the influence of the El Niño-Southern Oscillation on the wave climate variab... more This paper evaluates the influence of the El Niño-Southern Oscillation on the wave climate variability in the central region of Rio de Janeiro's coastal zone. The regional climate of the area was characterized using the WAVEWATCH III wave data model, obtained from NOAA, organized as a 35 year time series (1979-2013). These data were validated for the study area and a characterization and analysis performed by focusing on years with occurrence of strong El Niño/La Niña events. The correlation between the interannual variability of significant wave height and Oceanic Niño Index showed a slight reduction in significant wave height during El Niño years and the opposite pattern during La Niña years, with a lag of four months. This decrease could be attributed to the intensification of the South Atlantic High with a corresponding increase in the occurrence of subtropical jets during periods of El Niño. This weather change causes the blocking of cold fronts in the southern region of Brazil and the consequent reduction in the percentage of waves from the south along the southeast coast.

Research paper thumbnail of Morfodinâmica Multitemporal Em Praia Refletiva No Litoral Centro-Norte Do RJ, Em Resposta Ao Clima De Ondas Regional

Revista Brasileira de Geomorfologia, 2015

O artigo avalia a relação da morfodinâmica da praia do Lagomar, Macaé -RJ, com o clima de ondas r... more O artigo avalia a relação da morfodinâmica da praia do Lagomar, Macaé -RJ, com o clima de ondas regional e local do RJ, obtido através de resultados de simulações do modelo Wavewatch III, disponíveis para os anos de 1990-2009. Para tanto, foram avaliados três pontos de saídas de dados de ondas próximos à costa, sob diferentes graus de exposição, e seus resultados foram validados com dados medidos em campo por boia oceanográfi ca fundeada nas proximidades de Arraial do Cabo. Posteriormente, o comportamento das ondas foi relacionado com a morfologia da praia, a partir da análise de 41 perfi s topográfi cos analisados em multiescala temporal (1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004). Os resultados apontaram boa correlação do modelo com dados reais de altura e período de ondas para a costa do RJ e boa correlação entre as variações de energia de onda e as variações de volume no perfi l da praia ao longo da escala temporal avaliada.

Research paper thumbnail of A Numerical Model of the Tropical and South Atlantic Ocean Circulation

Journal of Geology & Geosciences, 2014