The meteorological imbalances in Brazil have a strong impact on the lives of the population acros... more The meteorological imbalances in Brazil have a strong impact on the lives of the population across the country, especially in the Amazon region. These impacts extend to meteorological phenomena, such as extreme rainfall, droughts, and an increase in temperature in several regions, as well as impacts on health, the economy, and, as the object of this study, the quality of life. This study presents the impact of meteorological changes on the quality of life in the Amazon region, based on (i) the thermal discomfort index (TDI), (ii) the temperature and humidity index (THI), and (iii) the effective temperature index as a function of the wind (TEFW). For this, meteorological data from the years 2003–2021 were used, in which the variables include total precipitation, global radiation, air-dry bulb temperature, the maximum temperature in the previous hour, the minimum temperature in the previous hour, relative humidity, and wind speed. This analysis indicates that for this tropical region,...
Plant species of the Brazilian Caatinga experience seasonal wet and dry extremes, requiring seaso... more Plant species of the Brazilian Caatinga experience seasonal wet and dry extremes, requiring seasonally different leaf characteristics for optimizing water availability. We investigated if Croton blanchetianus Baill exhibits leaf morphoanatomical traits across seasons and positioning in sunlight/natural shade. Leaves of ten 1-3 m tall plants in full sunlight and ten in natural shade were assessed in May, July (wet season), October and December (dry season) 2015 for gas exchange, leaf size, lamina and midrib cross sections (14 parameters), and chloroplast structure (5 parameters). Net photosynthesis was greater during the wet season (21.6 µm−2 s−1) compared to the dry season (5.8 µm−2 s−1) and was strongly correlated with almost all measured parameters (p < 0.01). Shaded leaves in the wet season had higher specific leaf area (19.9 m2 kg−1 in full-sun and 23.1 m2 kg−1 in shade), but in the dry season they did not differ from those in full sun (7.5 m2 kg−1 and 7.2 m2 kg−1). In the we...
The energy balance closure obtained through the eddy covariance method is a problem which persist... more The energy balance closure obtained through the eddy covariance method is a problem which persists, despite advances in the development and improvement of instruments and recent efforts in the description of corrections and in the characterization of measuring uncertainties. In most places the sum of sensible and latent heat fluxes (H and λE) is less than available energy, i.e. the difference between net radiation (Rn) and soil heat flux (G). This study analyzed the annual and seasonal behavior of the energy partitioning and energy balance closure in the Caatinga Biome, which is a seasonally dry tropical forest located in the semiarid lands of Brazil, using the eddy covariance method. Results showed high seasonal variability in the energy partitioning. During the dry season, approximately 70% of Rn was converted into H and less than 5% of it was converted into latent heat flux (λE). During the wet season, the Rn portion converted into H and λE was similar:˜40%. In annual terms, the Rn portion converted into H and λE was of the order of 50% and 20% respectively. The degree of the energy balance closure varied depending on the method used. When the closure was calculated using orthogonal regressions, the slope varied from 0.87 to 0.90 in 2014 and from 0.92 to 1.00 in 2015. However, when the closure was calculated by the energy balance ratio method, values varied from 0.70 to 0.79 in 2014 and from 0.73 to 0.82 in 2015. The closure was better in 2015 if compared to 2014 possibly due to the more intense turbulence observed in 2015 because friction velocity was higher than in 2014. The better closure in 2015 may also be associated with large eddies, which were more frequent in 2014 as evidenced by the correction coefficients for vertical wind velocity and water vapor and vertical wind velocity and sonic temperature. The energy balance closure was also analyzed considering atmospheric instability conditions and the best results were found under very unstable conditions, while the least expressive results were found under stable conditions. Under these conditions negative values of the energy balance ratio were also observed during dry and transition seasons, indicating that fluxes were reversed during these periods.
Tropical Forests - Ecology, Diversity and Conservation Status [Working Title]
Estimate Net Ecosystem Exchange (NEE) is important to better understand carbon exchanges between ... more Estimate Net Ecosystem Exchange (NEE) is important to better understand carbon exchanges between terrestrial ecosystems and the atmosphere. Comprehend these dynamics is essential to better understand the responses of environments to ongoing climatic changes. This study aims to analyze, with AMERIFLUX and LBA network measurements, the variability of NEE and climate variables in four different tropical coverages: Pantanal, Amazonia, Caatinga and Cerrado (savanna). Furthermore, was estimate the Gross Primary Productivity (GPP). We found a distinct seasonality of meteorological variables and CO2 fluxes in each site. Despite acting mostly as a CO2 sink, some environments already show worrying source data in certain periods, pointed out as a direct effect of the reduction of photosynthesis caused by land use changes. The preserved forest plays an important role in maintaining rainfall at a regional and global level, and its maintenance makes it possible, by the way, an important tool in c...
O objetivo deste estudo foi captar associações entre internações por doenças respiratórias e o ín... more O objetivo deste estudo foi captar associações entre internações por doenças respiratórias e o índice micrometeorológico do município de Santarém, localizado na região do Oeste do Pará no ano de 2010. Utilizaram-se números de internações de crianças de 0 a 4 anos e dados de variáveis meteorológicas (umidade relativa do ar, temperatura do ar, precipitação pluvial, pressão atmosférica). Calculou-se os índices micrometeorológicos, por meio da análise de componente principal, cada componente principal é uma combinação linear de todas as variáveis originais, independentes entre si e estimadas com o propósito de reter, o máximo de informação da variação total contida nos dados; Para detectar a associação utilizou-se as equações de estimação generalizadas que são empregadas quando se deseja ajustar, modelos para dados longitudinais, foi considerado a distribuição de probabilidade Poisson e a estrutura para a matriz de correlação do tipo permutável. Os resultados sinalizaram que o maior número de internações ocorreu no mês de junho coincidindo com período de transição entre as estações chuvosa e seca. Foram observadas associações estatísticas significativas, ressaltando que foi captado o risco relativo de 10% devido à sinergia das variáveis meteorológicas. Espera-se assim auxiliar no planejamento de políticas públicas ambientais e de saúde.
Anais do(a) Anais do II Congresso Amazônico de Meio Ambiente e Energias Renováveis
Para a análise do saldo de radiação, foram utilizados dados coletados pelo Eddy Covariance, insta... more Para a análise do saldo de radiação, foram utilizados dados coletados pelo Eddy Covariance, instalados em uma torre na FLONA do Tapajós. As componentes do balanço de energia do ano de 2002 apresentaram elevações em comparação ao de 2004. A mudança devese ao saldo de radiação que apresenta diferença de 1.4 W/m² para os primeiros semestres de 2002 para 2004 e 10.9 W/m² para os segundos semestres. Com a partição do fluxo de energia, notou-se que a razão de Bowen não apresentou diferença significativa, visto que a diferença foi de 0.03 W/m² para os primeiros semestres e 0.04 W/m² para os segundos. A precipitação nos primeiros e segundos semestres de 2002 e 2004, sofreram alterações, de 977mm e 1096mm, respectivamente. Por conta da densidade florestal da região, mesmo quando há uma
Several studies have explored the linkages between phenology and ecosystem productivity across th... more Several studies have explored the linkages between phenology and ecosystem productivity across the Amazon basin. However, few studies have focused on flooded forests, which correspond to c.a. 14% of the basin. In this study, we assessed the seasonality of ecosystem productivity (gross primary productivity, GPP) from eddy covariance measurements, environmental drivers and phenological patterns obtained from the field (leaf litter mass) and satellite measurements (enhanced vegetation index (EVI) from the Moderate Resolution Imaging Spectroradiometer/multi-angle implementation correction (MODIS/MAIAC)) in an Amazonian floodplain forest. We found that ecosystem productivity is limited by soil moisture in two different ways. During the flooded period, the excess of water limits GPP (Spearman’s correlation; rho = −0.22), while during non-flooded months, GPP is positively associated with soil moisture (rho = 0.34). However, GPP is maximized when cumulative water deficit (CWD) increases (rh...
Forest ecosystems sequester large amounts of atmospheric CO2, and the contribution from seasonall... more Forest ecosystems sequester large amounts of atmospheric CO2, and the contribution from seasonally dry tropical forests is not negligible. Thus, the objective of this study was to quantify and evaluate the seasonal and annual patterns of CO2 exchanges in the Caatinga biome, as well as to evaluate the ecosystem condition as carbon sink or source during years. In addition, we analyzed the climatic factors that control the seasonal variability of gross primary production (GPP), ecosystem respiration (Reco) and net ecosystem CO2 exchange (NEE). Results showed that the dynamics of the components of the CO2 fluxes varied depending on the magnitude and distribution of rainfall and, as a consequence, on the variability of the vegetation state. Annual cumulative NEE was significantly higher (p < 0.01) in 2014 (−169.0 g C m−2) when compared to 2015 (−145.0 g C m−2) and annual NEP/GPP ratio was 0.41 in 2014 and 0.43 in 2015. Global radiation, air and soil temperature were the main factors a...
The analysis of gross primary production (GPP) is crucial to better understand CO2 exchanges betw... more The analysis of gross primary production (GPP) is crucial to better understand CO2 exchanges between terrestrial ecosystems and the atmosphere, while the quantification of water-use efficiency (WUE) allows for the estimation of the compensation between carbon gained and water lost by the ecosystem. Understanding these dynamics is essential to better comprehend the responses of environments to ongoing climatic changes. The objective of the present study was to analyze, through AMERIFLUX and LBA network measurements, the variability of GPP and WUE in four distinct tropical biomes in Brazil: Pantanal, Amazonia, Caatinga and Cerrado (savanna). Furthermore, data measured by eddy covariance systems were used to assess remotely sensed GPP products (MOD17). We found a distinct seasonality of meteorological variables and energy fluxes with different latent heat controls regarding available energy in each site. Remotely sensed GPP was satisfactorily related with observed data, despite weak co...
As Ondas de Calor (OC) sao caracterizadas como um periodo prologado de calor excessivo, trata-se ... more As Ondas de Calor (OC) sao caracterizadas como um periodo prologado de calor excessivo, trata-se de evento climatico extremo que representa elevados riscos aos diversos segmentos da sociedade. Este trabalho teve como objetivo avaliar tendencias nas caracteristicas das OC registradas em Manaus / AM. Foram utilizados dados diarios de temperatura maxima do ar para o periodo de 1970 a 2019, obtidos a partir da estacao meteorologica convencional situada na regiao metropolitana do municipio. A identificacao das OC foi realizada a partir dos indices CTX90pct e GDE, e os testes de Mann-Kendall (MK), teste de Pettitt (TP), e Estimador de Tendencia de Sen (ETS) foram empregados para avaliar as possiveis tendencias. Os resultados apontam que as quatro caracteristicas das OC apresentaram aumento com significância estatistica a 1%, com os maiores valores observados na analise anual. O TP indica que esse aumento teve inicio entre 1996 e 2002, com o ETS apontando diferenca na magnitude tanto entre...
O objetivo deste trabalho é verificar os impactos ocasionados pelos três últimos eventos de seca ... more O objetivo deste trabalho é verificar os impactos ocasionados pelos três últimos eventos de seca na saúde da população de catorze municípios na Amazônia, agrupados em quatro grupos com características pluviométricas homogêneas. Utilizaram-se dados diários e mensais de precipitação e temperatura do ar disponibilizado pelo Banco de Dados Meteorológicos para Ensino e Pesquisa do Instituto Nacional de Meteorologia e de internações por doenças respiratórias do Sistema Único de Saúde, DATASUS, do período de 2000 a 2015. Levando-se em consideração as especificidades dos dados em estudo utilizou-se a modelagem via Equações de Estimação Generalizada para captar associações significativas e o risco relativo de aumento da ocorrência das internações da população exposta a ausência de chuva. Os resultados mostraram que as estações que muito sofreram com a seca de 2005 (região A) localizada a sudoeste da Amazônia também foram pouco afetadas negativamente pelo evento de 2015. Embora o evento de se...
The aim of this study was to estimate the methane flux in an area of upland forest on the Araguai... more The aim of this study was to estimate the methane flux in an area of upland forest on the Araguaia River margin, in Santa Terezinha - MT, 15 km far from the LBA project flux measurement tower on the Bananal island - TO. For this a micrometeorological tower was installed on the river margin, with climatic variables sensors, eddy covariance and methane concentration by open optical path and closed in days of the rainy season in the region. Estimates of CH4 concentration showed good correlation between the sensors, with the highest concentrations at night and lower concentrations during the day, likely effect of differences between CLN and CLC, and averages around 1.8 ppm, near to that found in other sites upland forest. Both the river and the forest are sources of methane to the atmosphere. with a higher methane flux from river directions, being double the average of the direction from forest, but the daytime maximum of the forest direction are larger and can reach up to 30 nmol m-2 s-1.
The aim of this study was to attract associations between hospitalizations for respiratory diseas... more The aim of this study was to attract associations between hospitalizations for respiratory diseases and micrometeorological index in the Santarém city, located in the West Pará region in the year 2010. It was used numbers of children hospitalizations with 0-4 years old and weather data variables (relative humidity, air temperature, precipitation, atmospheric pressure). Was calculated the Micrometeorological index, through principal component analysis, were each principal component is a linear combination of all the original variables, independent of each other and estimated in proposal to retain the maximum total variation information contained in the data; To detect the association we used generalized estimating equations that are used when you want to fit models for longitudinal data. The results suggest that the greatest number of admissions occurred in June coinciding with the transition period between the rainy and dry seasons. Statistically significant associations were observ...
The aim of this study was to evaluate the temporal evolution of average characteristics of the ve... more The aim of this study was to evaluate the temporal evolution of average characteristics of the vertical profiles of speed and direction above and within of the forest canopy at the Cuieiras experimental site, located about 100 km from the Manaus, Amazonas state, Brazil. We used about 10 months of half-hourly averaged data from 10 sonic anemometers installed at different levels above and within the forest canopy during GoAmazon project in 2014. We found that the vertical wind speed profile varied with the various layers above and below the forest canopy, describing an S-shape type, a form determined by physical obstructions imposed by vertical heterogeneity of the canopy. The predominant wind directions were not constant with height, suggesting that very local circulations can influence the subcanopy flow.
The meteorological imbalances in Brazil have a strong impact on the lives of the population acros... more The meteorological imbalances in Brazil have a strong impact on the lives of the population across the country, especially in the Amazon region. These impacts extend to meteorological phenomena, such as extreme rainfall, droughts, and an increase in temperature in several regions, as well as impacts on health, the economy, and, as the object of this study, the quality of life. This study presents the impact of meteorological changes on the quality of life in the Amazon region, based on (i) the thermal discomfort index (TDI), (ii) the temperature and humidity index (THI), and (iii) the effective temperature index as a function of the wind (TEFW). For this, meteorological data from the years 2003–2021 were used, in which the variables include total precipitation, global radiation, air-dry bulb temperature, the maximum temperature in the previous hour, the minimum temperature in the previous hour, relative humidity, and wind speed. This analysis indicates that for this tropical region,...
Plant species of the Brazilian Caatinga experience seasonal wet and dry extremes, requiring seaso... more Plant species of the Brazilian Caatinga experience seasonal wet and dry extremes, requiring seasonally different leaf characteristics for optimizing water availability. We investigated if Croton blanchetianus Baill exhibits leaf morphoanatomical traits across seasons and positioning in sunlight/natural shade. Leaves of ten 1-3 m tall plants in full sunlight and ten in natural shade were assessed in May, July (wet season), October and December (dry season) 2015 for gas exchange, leaf size, lamina and midrib cross sections (14 parameters), and chloroplast structure (5 parameters). Net photosynthesis was greater during the wet season (21.6 µm−2 s−1) compared to the dry season (5.8 µm−2 s−1) and was strongly correlated with almost all measured parameters (p < 0.01). Shaded leaves in the wet season had higher specific leaf area (19.9 m2 kg−1 in full-sun and 23.1 m2 kg−1 in shade), but in the dry season they did not differ from those in full sun (7.5 m2 kg−1 and 7.2 m2 kg−1). In the we...
The energy balance closure obtained through the eddy covariance method is a problem which persist... more The energy balance closure obtained through the eddy covariance method is a problem which persists, despite advances in the development and improvement of instruments and recent efforts in the description of corrections and in the characterization of measuring uncertainties. In most places the sum of sensible and latent heat fluxes (H and λE) is less than available energy, i.e. the difference between net radiation (Rn) and soil heat flux (G). This study analyzed the annual and seasonal behavior of the energy partitioning and energy balance closure in the Caatinga Biome, which is a seasonally dry tropical forest located in the semiarid lands of Brazil, using the eddy covariance method. Results showed high seasonal variability in the energy partitioning. During the dry season, approximately 70% of Rn was converted into H and less than 5% of it was converted into latent heat flux (λE). During the wet season, the Rn portion converted into H and λE was similar:˜40%. In annual terms, the Rn portion converted into H and λE was of the order of 50% and 20% respectively. The degree of the energy balance closure varied depending on the method used. When the closure was calculated using orthogonal regressions, the slope varied from 0.87 to 0.90 in 2014 and from 0.92 to 1.00 in 2015. However, when the closure was calculated by the energy balance ratio method, values varied from 0.70 to 0.79 in 2014 and from 0.73 to 0.82 in 2015. The closure was better in 2015 if compared to 2014 possibly due to the more intense turbulence observed in 2015 because friction velocity was higher than in 2014. The better closure in 2015 may also be associated with large eddies, which were more frequent in 2014 as evidenced by the correction coefficients for vertical wind velocity and water vapor and vertical wind velocity and sonic temperature. The energy balance closure was also analyzed considering atmospheric instability conditions and the best results were found under very unstable conditions, while the least expressive results were found under stable conditions. Under these conditions negative values of the energy balance ratio were also observed during dry and transition seasons, indicating that fluxes were reversed during these periods.
Tropical Forests - Ecology, Diversity and Conservation Status [Working Title]
Estimate Net Ecosystem Exchange (NEE) is important to better understand carbon exchanges between ... more Estimate Net Ecosystem Exchange (NEE) is important to better understand carbon exchanges between terrestrial ecosystems and the atmosphere. Comprehend these dynamics is essential to better understand the responses of environments to ongoing climatic changes. This study aims to analyze, with AMERIFLUX and LBA network measurements, the variability of NEE and climate variables in four different tropical coverages: Pantanal, Amazonia, Caatinga and Cerrado (savanna). Furthermore, was estimate the Gross Primary Productivity (GPP). We found a distinct seasonality of meteorological variables and CO2 fluxes in each site. Despite acting mostly as a CO2 sink, some environments already show worrying source data in certain periods, pointed out as a direct effect of the reduction of photosynthesis caused by land use changes. The preserved forest plays an important role in maintaining rainfall at a regional and global level, and its maintenance makes it possible, by the way, an important tool in c...
O objetivo deste estudo foi captar associações entre internações por doenças respiratórias e o ín... more O objetivo deste estudo foi captar associações entre internações por doenças respiratórias e o índice micrometeorológico do município de Santarém, localizado na região do Oeste do Pará no ano de 2010. Utilizaram-se números de internações de crianças de 0 a 4 anos e dados de variáveis meteorológicas (umidade relativa do ar, temperatura do ar, precipitação pluvial, pressão atmosférica). Calculou-se os índices micrometeorológicos, por meio da análise de componente principal, cada componente principal é uma combinação linear de todas as variáveis originais, independentes entre si e estimadas com o propósito de reter, o máximo de informação da variação total contida nos dados; Para detectar a associação utilizou-se as equações de estimação generalizadas que são empregadas quando se deseja ajustar, modelos para dados longitudinais, foi considerado a distribuição de probabilidade Poisson e a estrutura para a matriz de correlação do tipo permutável. Os resultados sinalizaram que o maior número de internações ocorreu no mês de junho coincidindo com período de transição entre as estações chuvosa e seca. Foram observadas associações estatísticas significativas, ressaltando que foi captado o risco relativo de 10% devido à sinergia das variáveis meteorológicas. Espera-se assim auxiliar no planejamento de políticas públicas ambientais e de saúde.
Anais do(a) Anais do II Congresso Amazônico de Meio Ambiente e Energias Renováveis
Para a análise do saldo de radiação, foram utilizados dados coletados pelo Eddy Covariance, insta... more Para a análise do saldo de radiação, foram utilizados dados coletados pelo Eddy Covariance, instalados em uma torre na FLONA do Tapajós. As componentes do balanço de energia do ano de 2002 apresentaram elevações em comparação ao de 2004. A mudança devese ao saldo de radiação que apresenta diferença de 1.4 W/m² para os primeiros semestres de 2002 para 2004 e 10.9 W/m² para os segundos semestres. Com a partição do fluxo de energia, notou-se que a razão de Bowen não apresentou diferença significativa, visto que a diferença foi de 0.03 W/m² para os primeiros semestres e 0.04 W/m² para os segundos. A precipitação nos primeiros e segundos semestres de 2002 e 2004, sofreram alterações, de 977mm e 1096mm, respectivamente. Por conta da densidade florestal da região, mesmo quando há uma
Several studies have explored the linkages between phenology and ecosystem productivity across th... more Several studies have explored the linkages between phenology and ecosystem productivity across the Amazon basin. However, few studies have focused on flooded forests, which correspond to c.a. 14% of the basin. In this study, we assessed the seasonality of ecosystem productivity (gross primary productivity, GPP) from eddy covariance measurements, environmental drivers and phenological patterns obtained from the field (leaf litter mass) and satellite measurements (enhanced vegetation index (EVI) from the Moderate Resolution Imaging Spectroradiometer/multi-angle implementation correction (MODIS/MAIAC)) in an Amazonian floodplain forest. We found that ecosystem productivity is limited by soil moisture in two different ways. During the flooded period, the excess of water limits GPP (Spearman’s correlation; rho = −0.22), while during non-flooded months, GPP is positively associated with soil moisture (rho = 0.34). However, GPP is maximized when cumulative water deficit (CWD) increases (rh...
Forest ecosystems sequester large amounts of atmospheric CO2, and the contribution from seasonall... more Forest ecosystems sequester large amounts of atmospheric CO2, and the contribution from seasonally dry tropical forests is not negligible. Thus, the objective of this study was to quantify and evaluate the seasonal and annual patterns of CO2 exchanges in the Caatinga biome, as well as to evaluate the ecosystem condition as carbon sink or source during years. In addition, we analyzed the climatic factors that control the seasonal variability of gross primary production (GPP), ecosystem respiration (Reco) and net ecosystem CO2 exchange (NEE). Results showed that the dynamics of the components of the CO2 fluxes varied depending on the magnitude and distribution of rainfall and, as a consequence, on the variability of the vegetation state. Annual cumulative NEE was significantly higher (p < 0.01) in 2014 (−169.0 g C m−2) when compared to 2015 (−145.0 g C m−2) and annual NEP/GPP ratio was 0.41 in 2014 and 0.43 in 2015. Global radiation, air and soil temperature were the main factors a...
The analysis of gross primary production (GPP) is crucial to better understand CO2 exchanges betw... more The analysis of gross primary production (GPP) is crucial to better understand CO2 exchanges between terrestrial ecosystems and the atmosphere, while the quantification of water-use efficiency (WUE) allows for the estimation of the compensation between carbon gained and water lost by the ecosystem. Understanding these dynamics is essential to better comprehend the responses of environments to ongoing climatic changes. The objective of the present study was to analyze, through AMERIFLUX and LBA network measurements, the variability of GPP and WUE in four distinct tropical biomes in Brazil: Pantanal, Amazonia, Caatinga and Cerrado (savanna). Furthermore, data measured by eddy covariance systems were used to assess remotely sensed GPP products (MOD17). We found a distinct seasonality of meteorological variables and energy fluxes with different latent heat controls regarding available energy in each site. Remotely sensed GPP was satisfactorily related with observed data, despite weak co...
As Ondas de Calor (OC) sao caracterizadas como um periodo prologado de calor excessivo, trata-se ... more As Ondas de Calor (OC) sao caracterizadas como um periodo prologado de calor excessivo, trata-se de evento climatico extremo que representa elevados riscos aos diversos segmentos da sociedade. Este trabalho teve como objetivo avaliar tendencias nas caracteristicas das OC registradas em Manaus / AM. Foram utilizados dados diarios de temperatura maxima do ar para o periodo de 1970 a 2019, obtidos a partir da estacao meteorologica convencional situada na regiao metropolitana do municipio. A identificacao das OC foi realizada a partir dos indices CTX90pct e GDE, e os testes de Mann-Kendall (MK), teste de Pettitt (TP), e Estimador de Tendencia de Sen (ETS) foram empregados para avaliar as possiveis tendencias. Os resultados apontam que as quatro caracteristicas das OC apresentaram aumento com significância estatistica a 1%, com os maiores valores observados na analise anual. O TP indica que esse aumento teve inicio entre 1996 e 2002, com o ETS apontando diferenca na magnitude tanto entre...
O objetivo deste trabalho é verificar os impactos ocasionados pelos três últimos eventos de seca ... more O objetivo deste trabalho é verificar os impactos ocasionados pelos três últimos eventos de seca na saúde da população de catorze municípios na Amazônia, agrupados em quatro grupos com características pluviométricas homogêneas. Utilizaram-se dados diários e mensais de precipitação e temperatura do ar disponibilizado pelo Banco de Dados Meteorológicos para Ensino e Pesquisa do Instituto Nacional de Meteorologia e de internações por doenças respiratórias do Sistema Único de Saúde, DATASUS, do período de 2000 a 2015. Levando-se em consideração as especificidades dos dados em estudo utilizou-se a modelagem via Equações de Estimação Generalizada para captar associações significativas e o risco relativo de aumento da ocorrência das internações da população exposta a ausência de chuva. Os resultados mostraram que as estações que muito sofreram com a seca de 2005 (região A) localizada a sudoeste da Amazônia também foram pouco afetadas negativamente pelo evento de 2015. Embora o evento de se...
The aim of this study was to estimate the methane flux in an area of upland forest on the Araguai... more The aim of this study was to estimate the methane flux in an area of upland forest on the Araguaia River margin, in Santa Terezinha - MT, 15 km far from the LBA project flux measurement tower on the Bananal island - TO. For this a micrometeorological tower was installed on the river margin, with climatic variables sensors, eddy covariance and methane concentration by open optical path and closed in days of the rainy season in the region. Estimates of CH4 concentration showed good correlation between the sensors, with the highest concentrations at night and lower concentrations during the day, likely effect of differences between CLN and CLC, and averages around 1.8 ppm, near to that found in other sites upland forest. Both the river and the forest are sources of methane to the atmosphere. with a higher methane flux from river directions, being double the average of the direction from forest, but the daytime maximum of the forest direction are larger and can reach up to 30 nmol m-2 s-1.
The aim of this study was to attract associations between hospitalizations for respiratory diseas... more The aim of this study was to attract associations between hospitalizations for respiratory diseases and micrometeorological index in the Santarém city, located in the West Pará region in the year 2010. It was used numbers of children hospitalizations with 0-4 years old and weather data variables (relative humidity, air temperature, precipitation, atmospheric pressure). Was calculated the Micrometeorological index, through principal component analysis, were each principal component is a linear combination of all the original variables, independent of each other and estimated in proposal to retain the maximum total variation information contained in the data; To detect the association we used generalized estimating equations that are used when you want to fit models for longitudinal data. The results suggest that the greatest number of admissions occurred in June coinciding with the transition period between the rainy and dry seasons. Statistically significant associations were observ...
The aim of this study was to evaluate the temporal evolution of average characteristics of the ve... more The aim of this study was to evaluate the temporal evolution of average characteristics of the vertical profiles of speed and direction above and within of the forest canopy at the Cuieiras experimental site, located about 100 km from the Manaus, Amazonas state, Brazil. We used about 10 months of half-hourly averaged data from 10 sonic anemometers installed at different levels above and within the forest canopy during GoAmazon project in 2014. We found that the vertical wind speed profile varied with the various layers above and below the forest canopy, describing an S-shape type, a form determined by physical obstructions imposed by vertical heterogeneity of the canopy. The predominant wind directions were not constant with height, suggesting that very local circulations can influence the subcanopy flow.
Uploads
Papers by gabriel costa