Mostrando 10 resultados de: 16
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Article(16)
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Journal of South American Earth Sciences(2)
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scopus(16)
Assessing Orinoco river sediment discharge trend using MODIS satellite images
ArticleAbstract: The aim of this study was to derive the Surface Suspended Sediment Concentration (SSSC) and river sePalabras claves:Modis, Orinoco River, Sediment load, Suspended sediments, Water colorAutores:Abrahan Mora, Alfonso J.A., Carrera J.M., Castellano B., Cochonneau G., Gallay M., Laraque A., Lopez J.L., Martinez J.M., Yepez S.Fuentes:scopusBlack carbon footprint of human presence in Antarctica
ArticleAbstract: Black carbon (BC) from fossil fuel and biomass combustion darkens the snow and makes it melt sooner.Palabras claves:Autores:Alfonso J.A., Asencio V., Carrasco J., Carrera J.M., Casassa G., Cordero R.R., Damiani A., Dana J., Fernandoy F., Feron S., Jose A. Jorquera, Khan A.L., Llanillo P.J., Malhotra A., Neshyba S., Rowe P.M., Seckmeyer G., Sepulveda E., Stepanova M., Wachter P., Wang C.Fuentes:scopusBlack carbon in the Southern Andean snowpack
ArticleAbstract: The Andean snowpack is an important source of water for many communities. As other snow-covered regiPalabras claves:Andes, Black Carbon, SnowAutores:Alfonso J.A., Asencio V., Carrasco J., Carrera J.M., Casassa G., Cordero R.R., Damiani A., Dana J., Fernandoy F., Feron S., Jose A. Jorquera, Khan A.L., Llanillo P.J., MacDonell S., Neshyba S., Rowe P.M., Seckmeyer G., Sepulveda E., Wang C.Fuentes:scopusCaura River basin: Weathering rates, CO<inf>2</inf> consumption, and chemistry of major and trace elements in an Orinoco River tributary coming from the Precambrian Guayana Shield, Venezuela
ArticleAbstract: This study describes the geochemistry of dissolved elements in the Caura River and gives informationPalabras claves:Caura river, geochemistry, major elements, plant decay, Trace elements, WeatheringAutores:Abrahan Mora, Alfonso J.A., Balza L., Baquero J.C., Pisapia D.Fuentes:scopusGeochemistry of recent lacustrine sediments from Fildes Peninsula, King George Island, maritime Antarctica
ArticleAbstract: Comprehensive geochemical analyses (bulk parameters, major and trace elements, organic matter, minerPalabras claves:Chemical weathering, comprehensive geochemical characterization, lake sediments, South Shetlands IslandsAutores:Abrahan Mora, Alfonso J.A., Handt H., Hernández A.C., Sira E., Vasquez Y.Fuentes:scopusElemental and Mineralogical Composition of the Western Andean Snow (18°S–41°S)
ArticleAbstract: The snowpack is an important source of water for many Andean communities. Because of its importance,Palabras claves:Autores:Alfonso J.A., Carrasco J., Carrera J.M., Casassa G., Cordero R.R., Damiani A., Fernandoy F., Feron S., Garcia B., Jose A. Jorquera, Kang C.M., Lambert F., Llanillo P.J., MacDonell S., Neshyba S., Oyola P., Pizarro J., Rowe P.M., Sepulveda E.Fuentes:scopusEvaluation of MODIS-derived estimates of the albedo over the Atacama Desert using ground-based spectral measurements
ArticleAbstract: Surface albedo is an important forcing parameter that drives the radiative energy budget as it deterPalabras claves:Autores:Alfonso J.A., Carrera J.M., Cordero R.R., Damiani A., Feron S., Fuenzalida R., Jose A. Jorquera, Lhermitte S., MacDonell S., Ouyang Z., Rivas M., Seckmeyer G., Sepulveda E., Wang C.Fuentes:scopusDistribution and environmental impact of radionuclides in marine sediments along the Venezuelan coast
ArticleAbstract: The activity concentrations of 137Cs, 40K, 226Ra and 232Th in Bq/kg from 42 marine sediment samplesPalabras claves:Marine sediments, Natural radioactivity, radionuclides, Venezuelan coastAutores:Abrahan Mora, Alfonso J.A., Handt H., LaBrecque J.J., Palacios D., Pérez K., Vasquez Y.Fuentes:scopusDistribution of trace elements in offshore sediments of the Orinoco Delta
ArticleAbstract: Surficial sediments from 56 stations on the Orinoco Delta offshore zone were analyzed by x-ray fluorPalabras claves:geochemistry, Heavy Metals, Surface sediments, VENEZUELA, X-ray fluorescenceAutores:Alfonso J.A., Benzo Z., Flores S., Manuel MartínezFuentes:scopusDynamics of dissolved major (Na, K, Ca, Mg, and Si) and trace (Al, Fe, Mn, Zn, Cu, and Cr) elements along the lower Orinoco River
ArticleAbstract: This study addresses the changes in dissolved major and trace element concentrations along the OrinoPalabras claves:major elements, mixing zone, Organic matter, Orinoco River, Trace elementsAutores:Abrahan Mora, Alfonso J.A., Balza L., Baquero J.C., Laraque A., Mahlknecht J., Pisapia D.Fuentes:scopus