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Showing 1 to 14 of 14 for “"Cariaco Basin"”.
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Tracking Changes In Silicon Isotopic Composition During Diatom Descent and Dissolution In the Cariaco Basin.
… of sinking diatom opal in the Cariaco Basin to evaluate primary controls on diatom δ<super>30</super>Si values. The Cariaco Basin time series consists of four sediment traps at progressively greater depths on a single mooring and monthly hydrographic and dissolved nutrient …
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Tracing hydrological millennial-scale cycles in the late Quaternary of the Cariaco Basin and the southern Gulf of Cádiz using coccoliths and dinoflagellate cysts
… cycles during Late Quaternary times: the Cariaco Basin, an anoxic basin offshore Venezuela and the Southern Gulf of Cádiz, offshore Morocco. Because of the high sedimentation rates, both sites contain a relatively undisturbed Late Quaternary climate record. Both record rapid, large …
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Seasonal and Annual Variability In Elemental and Isotopic Proxies of Past Ocean Conditions: Results From the Guaymas and Cariaco Basins
… in time series sediment traps from the Guaymas Basin in the Gulf of California and the Cariaco Basin, Venezuela. In Cariaco Basin, the highest flux of planktonic foraminifera occurs during spring upwelling. In response to decreasing upwelling strength and increasing temperatures, the abundance …
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Geochemical tools and paleoclimate clues : multi-molecular and isotropic investigations of tropical marine sediments and alpine ice
… since the last glacial period, as evidenced from Cariaco Basin (Venezuelan coast) and Peru Margin marine sediment biomarker records. Compounds derived from vascular plant leaf waxes and delivered to the marine sedimentary environment, including long-chain (C24-C32) n-alkanoic acids, were used as …
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Late Quaternary climate variability and terrestrial carbon cycling in tropical South America
… years at two sites: the Lake Titicaca drainage basin in the Central Andes and the Pantanal wetlands in the interior lowlands. Diverging hydrologic trends at these two sites during the last glacial period suggest altered monsoon circulation patterns under glacial conditions, while changes in …
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Late Quaternary climate variability and terrestrial carbon cycling in tropical South America
… years at two sites: the Lake Titicaca drainage basin in the Central Andes and the Pantanal wetlands in the interior lowlands. Diverging hydrologic trends at these two sites during the last glacial period suggest altered monsoon circulation patterns under glacial conditions, while changes in …
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Tropical climate variability from the last glacial maximum to the present
… Convergence Zone (ITCZ) in the Atlantic basin, which affects sea surface temperature (SST) and precipitation patterns throughout the tropical Atlantic. The second is the strength of the Indian Monsoon, an important component of both tropical and global climate. Long-term variations in the …
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Geochemical tools and paleoclimate clues : multi-molecular and isotopic investigations of tropical marine sediments and alpine ice
… since the last glacial period, as evidenced from Cariaco Basin (Venezuelan coast) and Peru Margin marine sediment biomarker records. Compounds derived from vascular plant leaf waxes and delivered to the marine sedimentary environment, including long-chain (C24-C32) nalkanoic acids, were used as …
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The temporal dynamics of terrestrial organic matter transfer to the oceans : initial assessment and application
… certain vascular plant biomarkers extracted from Cariaco Basin (Caribbean Sea) and Saanich Inlet (coastal British Columbia) sediments with the radiocarbon evolution of atmospheric carbon dioxide reveals that the vast majority of the terrestrial OC experiences multi-millennial residence times on …
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Centennial-scale elemental and isotopic variability in the tropical and subtropical North Atlantic Ocean
… barium, and lead, are presented from the Cariaco Basin. First, a reliable method is developed for stable lead isotope analysis by multiple collector ICP-MS. This study presents new observations of the large (0.7% amu-l), time-dependent mass fractionation determined by thallium …
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The temporal dynamics of terrestrial organic matter transfer to the oceans : initial assessment and application
… certain vascular plant biomarkers extracted from Cariaco Basin (Caribbean Sea) and Saanich Inlet (coastal British Columbia) sediments with the radiocarbon evolution of atmospheric carbon dioxide reveals that the vast majority of the terrestrial OC experiences multi-millennial residence times on …
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Characterization of microbial primary and secondary metabolism in the marine realm
… along the oxycline water column of the Cariaco Basin, Venezuela, revealed that differences in water column redox potential were associated with microbial lifestyle and the predicted composition and production of secondary metabolites. This experience set the stage for my third chapter, …
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Tropical climate variability from the last glacial maximum to the present
… Convergence Zone (ITCZ) in the Atlantic basin, which affects sea surface temperature (SST) and precipitation patterns throughout the tropical Atlantic. The second is the strength of the Indian Monsoon, an important component of both tropical and global climate. Long-term variations in the …
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Characterization of Microbial Primary and Secondary Metabolism in the Marine Realm
… along the oxycline water column of the Cariaco Basin, Venezuela, revealed that differences in water column redox potential were associated with microbial lifestyle and the predicted composition and production of secondary metabolites. This experience set the stage for my third chapter, …