22 research outputs found
caiostringari/BBC-JGR-Oceans: Supporting code and data (v0.2)
No full textSupporting code and data for the manuscript Quantifying Bore-bore Capture on Natural Beaches
Lidar observations of multi-modal swash probability distributions on a dissipative beach
No full textUnderstanding swash zone dynamics is of crucial importance for coastal management as the swash motion, consisting of the uprush of the wave on the beach face and the subsequent downrush, is responsible for driving changes in the beach morphology through sediment exchanges between the sub-aerial and sub-aqueous beach. Improved understanding of the probabilistic characteristics of these motions has the potential to allow coastal engineers to develop improved sediment transport models which, in turn, can be further developed into coastal management tools. In this paper, novel descriptors of swash motions are obtained by combining field data and statistical modelling. Our results indicate that the probability distribution function (PDF) of shoreline height timeseries (p(ζ)) and trough-to-peak swash heights (p(ρ)) measured at a high energy, sandy beach were both inherently multimodal. Based on the observed multimodality of these PDFs, Gaussian mixtures are shown to be the best method to statistically model them. Further, our results show that both offshore and surf zone dynamics are responsible for driving swash zone dynamics, which indicates unsaturated swash. The novel methods and results developed in this paper, both data collection and analysis, could aid coastal managers to develop improved swash zone models in the future
LiDAR Observations of Multi-Modal Swash Probability Distributions on a Dissipative Beach
No full textUnderstanding swash zone dynamics is of crucial importance for coastal management as the swash motion, consisting of the uprush of the wave on the beach face and the subsequent downrush, is responsible for driving changes in the beach morphology through sediment exchanges between the sub-aerial and sub-aqueous beach. Improved understanding of the probabilistic characteristics of these motions has the potential to allow coastal engineers to develop improved sediment transport models which, in turn, can be further developed into coastal management tools. In this paper, novel descriptors of swash motions are obtained by combining field data and statistical modelling. Our results indicate that the probability distribution function (PDF) of shoreline height timeseries (p(ζ)) and trough-to-peak swash heights (p(ρ)) measured at a high energy, sandy beach were both inherently multimodal. Based on the observed multimodality of these PDFs, Gaussian mixtures are shown to be the best method to statistically model them. Further, our results show that both offshore and surf zone dynamics are responsible for driving swash zone dynamics, which indicates unsaturated swash. The novel methods and results developed in this paper, both data collection and analysis, could aid coastal managers to develop improved swash zone models in the future
Estudo Numérico Lagrangeano do Deslocamento de Manchas de Óleo
No full textEste trabalho visa a apresentação de resultados preliminares de um modelo de simulação do comportamento do óleo em ambientes marinhos. O modelo está sendo desenvolvido através da utilização de traçadores lagrangeanos para a simulação do deslocamento da parcela particulada do campo de óleo. Os resultados mostram o deslocamento das partículas do óleo de acordo com um campo de velocidade imposto
Estudo Numérico Lagrangeano do Deslocamento de Manchas de Óleo
No full textEste trabalho visa a apresentação de resultados preliminares de um modelo de simulação do comportamento do óleo em ambientes marinhos. O modelo está sendo desenvolvido através da utilização de traçadores lagrangeanos para a simulação do deslocamento da parcela particulada do campo de óleo. Os resultados mostram o deslocamento das partículas do óleo de acordo com um campo de velocidade imposto
Viability of the energy conversion from marine currents into the south Brazilian shelf
No full textVárias formas de conversão de energia foram desenvolvidas no decorrer dos anos, com destaque para os conversores de energia das correntes, que demonstram alta capacidade de geração energética e já se encontram em funcionamento em algumas regiões do mundo. A Plataforma Continental Sul do Brasil possui alta variabilidade espacial e temporal no regime de correntes costeiras, fato que dificulta a conversão unidirecional de energia. Neste sentido, para a conversão de energia das correntes, seria recomendado o uso de turbinas helicoidais que são capazes de gerar energia de forma multidirecional. A região de estudo demonstrou possuir duas regiões com ótimo potencial energético, onde na região mais viável a produção média de energia pode alcançar 40 MWh e ainda valores integrados de 13GWh/ano. Através da simulação de sítios de conversão nos locais de maior viabilidade, foi observado que o padrão da velocidade residual das correntes é predominantemente direcionado para sudoeste, devido à predominância de ventos de quadrante norte, sendo o sítio mais energético capaz de gerar 274 GWh durante os 280 dias de simulação. Foi observado que os ciclos de maior geração energética ocorrem com periodicidade de 16 dias demonstrando alta correlação com eventos associados à passagem de frentes meteorológicas na região.Several methods of energy conversion have been developed over the years, especially the current energy converter turbine-based, which demonstrate high energy generation capacity and that have already been in operation. The Southern Brazilian Shelf presents high synoptic and seasonal variability of coastal current systems, which hinder the unidirectional conversion of energy. Hence, it is recommended to use helical turbines which are capable of generating energy in a multidirectional way. The studied area has shown two regions with high potential for exploitation of energy from marine currents, in which the region more viable can reach an average production around 40 MWh and integrated values of 13GWh/year. Through the site of conversion simulations on the more viable spots, it was observed that the pattern of the residual currents is mainly directed through southeast, due to the predominance of wind from the northern quadrant, being the most energetic sites capable of producing 274 GWh during the 280 days of simulation. It was also observed that the highest levels of power generation were found at intervals of 16 days, showing high correlation with events associated with the passage of meteorological fronts along the study region
cokelaer/fitter: v1.2.3 synchronised on pypi
No full textuse logging module instead of prints
add fitter standalone application
add progress ba
Viability of the energy conversion from marine currents into the south Brazilian shelf
No full textVárias formas de conversão de energia foram desenvolvidas no decorrer dos anos, com destaque para os conversores de energia das correntes, que demonstram alta capacidade de geração energética e já se encontram em funcionamento em algumas regiões do mundo. A Plataforma Continental Sul do Brasil possui alta variabilidade espacial e temporal no regime de correntes costeiras, fato que dificulta a conversão unidirecional de energia. Neste sentido, para a conversão de energia das correntes, seria recomendado o uso de turbinas helicoidais que são capazes de gerar energia de forma multidirecional. A região de estudo demonstrou possuir duas regiões com ótimo potencial energético, onde na região mais viável a produção média de energia pode alcançar 40 MWh e ainda valores integrados de 13GWh/ano. Através da simulação de sítios de conversão nos locais de maior viabilidade, foi observado que o padrão da velocidade residual das correntes é predominantemente direcionado para sudoeste, devido à predominância de ventos de quadrante norte, sendo o sítio mais energético capaz de gerar 274 GWh durante os 280 dias de simulação. Foi observado que os ciclos de maior geração energética ocorrem com periodicidade de 16 dias demonstrando alta correlação com eventos associados à passagem de frentes meteorológicas na região.Several methods of energy conversion have been developed over the years, especially the current energy converter turbine-based, which demonstrate high energy generation capacity and that have already been in operation. The Southern Brazilian Shelf presents high synoptic and seasonal variability of coastal current systems, which hinder the unidirectional conversion of energy. Hence, it is recommended to use helical turbines which are capable of generating energy in a multidirectional way. The studied area has shown two regions with high potential for exploitation of energy from marine currents, in which the region more viable can reach an average production around 40 MWh and integrated values of 13GWh/year. Through the site of conversion simulations on the more viable spots, it was observed that the pattern of the residual currents is mainly directed through southeast, due to the predominance of wind from the northern quadrant, being the most energetic sites capable of producing 274 GWh during the 280 days of simulation. It was also observed that the highest levels of power generation were found at intervals of 16 days, showing high correlation with events associated with the passage of meteorological fronts along the study region
Viabilidade de conversão da energia de correntes marinhas na plataforma continental Sul do Brasil
No full textVárias formas de conversão de energia foram desenvolvidas no decorrer dos anos, com destaque para os conversores de energia das correntes, que demonstram alta capacidade de geração energética e já se encontram em funcionamento em algumas regiões do mundo. A Plataforma Continental Sul do Brasil possui alta variabilidade espacial e temporal no regime de correntes costeiras, fato que dificulta a conversão unidirecional de energia. Neste sentido, para a conversão de energia das correntes, seria recomendado o uso de turbinas helicoidais que são capazes de gerar energia de forma multidirecional. A região de estudo demonstrou possuir duas regiões com ótimo potencial energético, onde na região mais viável a produção média de energia pode alcançar 40 MWh e ainda valores integrados de 13GWh/ano. Através da simulação de sítios de conversão nos locais de maior viabilidade, foi observado que o padrão da velocidade residual das correntes é predominantemente direcionado para sudoeste, devido à predominância de ventos de quadrante norte, sendo o sítio mais energético capaz de gerar 274 GWh durante os 280 dias de simulação. Foi observado que os ciclos de maior geração energética ocorrem com periodicidade de 16 dias demonstrando alta correlação com eventos associados à passagem de frentes meteorológicas na região.Several methods of energy conversion have been developed over the years, especially the current energy converter turbine-based, which demonstrate high energy generation capacity and that have already been in operation. The Southern Brazilian Shelf presents high synoptic and seasonal variability of coastal current systems, which hinder the unidirectional conversion of energy. Hence, it is recommended to use helical turbines which are capable of generating energy in a multidirectional way. The studied area has shown two regions with high potential for exploitation of energy from marine currents, in which the region more viable can reach an average production around 40 MWh and integrated values of 13GWh/year. Through the site of conversion simulations on the more viable spots, it was observed that the pattern of the residual currents is mainly directed through southeast, due to the predominance of wind from the northern quadrant, being the most energetic sites capable of producing 274 GWh during the 280 days of simulation. It was also observed that the highest levels of power generation were found at intervals of 16 days, showing high correlation with events associated with the passage of meteorological fronts along the study region
