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A statistical approach to relationships between fluid emissions and faults: The Sea of Marmara case ArchiMer
Henry, P.; Grall, Celine; Kende, J.; Viseur, S.; Ozeren, M. S.; Sengor, A. M. C.; Dupre, Stephanie; Scalabrin, Carla; Geli, Louis.
The Sea of Marmara is traversed by the North Anatolian Fault system and also presents abundant emission sites of methane gas into the water column. In order to assess the spatial relationship between gas emissions and active faults, the distribution of distances between gas emission sites and the nearest fault is calculated and compared with the distribution of distances between a uniform random distribution of points (Poisson process representing the null hypothesis of an absence of relationship between gas emissions and faults) and the nearest fault. Interestingly, the distance distribution for the Poisson process is nearly exponential, indicating that the fault map does not have a characteristic scale other than that representing the intensity of the...
Tipo: Text Palavras-chave: Cold seeps; Gas emissions; Transform plate boundary; Strike-slip fault; Damage zone.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00441/55252/56739.pdf
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Acoustic monitoring of gas emissions from the seafloor. Part I: quantifying the volumetric flow of bubbles ArchiMer
Leblond, Isabelle; Scalabrin, Carla; Berger, Laurent.
Three decades of continuous ocean exploration have led us to identify subsurface fluid related processes as a key phenomenon in marine earth science research. The number of seep areas located on the seafloor has been constantly increasing with the use of multi-scale imagery techniques. Due to recent advances in transducer technology and computer processing, multibeam echosounders are now commonly used to detect submarine gas seeps escaping from the seafloor into the water column. A growing number of en-route surveys shows that sites of gas emissions escaping from the seafloor are much more numerous than previously thought. Estimating the temporal variability of the gas flow rate and volumes escaping from the seafloor has thus become a challenge of relevant...
Tipo: Text Palavras-chave: Seafloor observatory; Water column acoustics; Forward and inverse modeling; Fisheries echosounders; Acoustic backscattering; Gas emissions; Bubbles; Water tank experiments.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00192/30336/29094.pdf
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Ammonia emissions in tunnel-ventilated broiler houses Rev. Bras. Ciênc. Avic.
Lima,KAO; Moura,DJ; Carvalho,TMR; Bueno,LGF; Vercellino,RA.
Gas production in broiler houses and their emissions are closely related to the microclimate established inside the house according to air temperature, humidity, and velocity. Therefore, the internal house environment is influenced by building typology and ventilation system. The objective of the present study was to evaluate ammonia emission rates in broiler houses equipped with different ventilation systems (negative or positive pressure) and litter conditions (new or built-up). The environment of six commercial broiler houses was evaluated internal and external NH3 concentrations. Ventilation rates were recorded to estimate ammonia emission rates. The efficiency of circulation and exhaust fans was assessed, and higher ventilation rates were determined...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Gas emissions; Ventilation systems.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000400008
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Quantification and qualification of exhaust gases in agricultural diesel engine operating with biodiesel mixtures AGRIAMBI
Silva,Flávio C. da; Aranha,Felipe N.; Angelkorte,Gerd B.; Guardiola,Juan F. H.; Teixeira,Luciana P.; Correia,Ricardo C. de B..
ABSTRACT Diesel cycle engines are widely used in agricultural machinery. Biodiesel offers the possibility of partial or total replacement of mineral diesel, thus reducing the dependence of agriculture on this non-renewable resource and decreasing pollutant emissions. The objective of this study was to evaluate the emissions of CO, NOx, SO2, CO2, and O2 from various biodiesel mixtures (B0 = 0%, B7 = 7%, B10 = 10%, B20 = 20%, B30 = 30% and B100 = 100%) in a single-cylinder tractor engine at 1000, 1600 and 2400 rpm. The exhaust gases were identified using a gas probe meter. Fuels with a higher percentage of biodiesel have the lowest SO2 emissions, with the B30 mixture releasing 65.78, 52.47 and 32.25 parts per million at 1000, 1600 and 2000 rpm, respectively....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gas emissions; Agricultural tractor; Biofuels.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001000794
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Transferência de tecnologias para consolidação do Plano ABC no Tocantins. Infoteca-e
FREITAS, A. A. de; BELCHIOR, E. B.; ALCÂNTARA, P. H. R. de; BARBOSA, C. F..
Para o alcance dos objetivos traçados pelo Plano ABC o governo federal tem estabelecido ações em parceria com os governos estaduais e municipais, para que cada ente federativo coopere assumindo uma parcela das metas estabelecidas. No sentido de fomentar a adoção de tecnologias ou aprimoramento produtivo para viabilizar práticas agrícolas que possibilitem baixas taxas de emissão de carbono, por parte dos produtores, o governo federal criou a linha de crédito 'Programa ABC'. O estado do Tocantins foi um dos primeiros a criar um Grupo Gestor Estadual (GEE) com o objetivo de promover o debate entre os diversos segmentos da sociedade e com isso definir metas e estratégias adequadas às realidades locais. O Plano Estadual é o instrumento oficial que contem o...
Tipo: Parte de livro Palavras-chave: Baixa emissão de carbono; Tocantins; Programa ABC; Transferência de Tecnologia; Adoção de Inovações; Carbono; Technology transfer; Gas emissions.
Ano: 2022 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1143017
Registros recuperados: 5
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