Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 24 for “"Amazon River"”.
-
Major element geochemistry of the Amazon River system
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1980.
-
Geochemistry of alkaline-earth elements in the Amazon River
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1979.
-
Patterns of shallow clouds and rainfall over the Amazon : climatic impacts of deforestation
… to a lesser extent, cold cloud patterns over the Amazon. Through complex interactions, the results reported in this thesis may have important implications for the local ecosystem dynamics of the Amazon, for the geomorphology of the Amazon river basin, for the flow regimes of the Amazon river, and …
-
Novel analytical strategies for tracing the organic carbon cycle in marine and riverine particles
… carbon (POC) in the ocean and mobilized by rivers on land transfers ~0.1% of global primary productivity to the deep ocean sediments. This small fraction regulates the long-term carbon cycle by removing carbon dioxide from the atmosphere for centuries to millennia. This thesis investigates …
-
Novel analytical strategies for tracing the organic carbon cycle in marine and riverine particles
… carbon (POC) in the ocean and mobilized by rivers on land transfers -0. 1% of global primary productivity to the deep ocean sediments. This small fraction regulates the long-term carbon cycle by removing carbon dioxide from the atmosphere for centuries to millennia. This thesis investigates …
-
Mechanisms of terrestrial organic carbon export and preservation in the marine environment
… The thesis focuses on two globally important river systems that collectively deliver 25% of the total terrestrial carbon flux to the ocean, the Ganges-Brahmaputra (G-B) Rivers and the Amazon River. The first two chapters focus on the G-B Rivers, utilizing compound specific biomarker analysis …
-
Mechanisms of terrestrial organic carbon export and preservation in the marine environment
… The thesis focuses on two globally important river systems that collectively deliver 25% of the total terrestrial carbon flux to the ocean, the Ganges-Brahmaputra (G-B) Rivers and the Amazon River. The first two chapters focus on the G-B Rivers, utilizing compound specific biomarker analysis …
-
Concentrations, Distributions and Chemical Speciation of Zinc and Cadmium in the Equatorial and South Atlantic Ocean
… distribution exerted on surface waters near the Amazon River plume and on subsurface waters by a hypoxic region in the Equatorial Atlantic.</p> <p>As of water masses of more widespread distribution, the influence of factors like the Amazon River particles/Equatorial area high productivity on …
-
Geografías de conocimiento y poder: la construcción espacial de la Real Audiencia de Quito
… to explore Quito and its vicinities such as the Amazon River. In the works of Fray Gaspar de Carvajal and Cristobal de Acuña, the Amazon River was represented as a body that could be controlled religiously and politically due to Catholicism and to the geographical position of the city of Quito. …
-
The Development and Role of Peripheral Auditory Structures in <i>Otocinclus affinis</i>
… family of catfishes found primarily in the Amazon River basin. These catfishes have a unique characteristic feature of having fenestrae (holes) in the skull region (compound pterotic bone) adjacent to their bi-lobed swim bladder. Since the swim bladders and the compound pterotic may act as …
-
Sensemaking and Human-Centred Design: A Practice Perspective
… care delivery and an unlikely voyage of the Amazon River, this portfolio shows that they are relevant to a wide range of settings. Rather than isolating the components or key variables of such work and taking their measure, this research advances a more holistic view of sensemaking and …
-
The marine geochemistry of iron and iron isotopes
… of iron. Trace metal clean plankton tows, river samples, aerosol leachates, and porewater samples were measured for their iron isotopic composition using a GV Instruments IsoProbe Multi-collector ICPMS. The Fe isotopic composition of plankton tow samples varied by over 4%o (in 56Fe/54Fe). …
-
Human and environmental influences on the distribution and abundance of arapaima in river floodplains of the Lower Amazon
… and abundance of arapaima (Arapaima spp.) in river floodplains of the lower Amazon River, near the municipality of Santarém, Para State, Brazil. In chapter 1, a study of eight environmental variables in 13 dry season floodplain lakes demonstrates that lake depth, relative depth, conductivity, …
-
Uakaris and Amazonian flooded forest.
Uakari monkeys from the Amazon River basin are the most specialized primates in the Neotropical region. Their short tails, peculiar dentition and external morphology are strikingly divergent from most other platyrrhines. Furthermore, their geographical range is small and restricted to the forests …
-
Morphodynamics of large anabranching rivers : the case of the Madeira River, Brazil
… are the dominant channel pattern of large rivers worldwide. The top nine largest rivers of the world by water discharge, in particular, all develop anabranching channels. Given the limited understanding on large river morphodynamics and the mechanisms of formation and process of …
-
Tectonic and Climatic Controls on Continental River Systems
Erosion by rivers is the dominant driver of topographic change over much of Earth’s terrestrial surface, and sets the pace of change for other landscape processes. In this thesis, I explore the complexities of landscapes evolving under fluvial processes. I address questions of how rivers respond to …
-
Dynamic river networks drive landscape change and biological evolution
Rivers transport sediment, nutrients and life throughout a continent, all-the while shaping the landscapes they flow through. My thesis investigates the processes that govern the dynamics of river basins and the ways in which these processes may influence the evolution of aquatic life. In Chapters …
-
The marine geochemistry of iron and iron isotopes
… of iron. Trace metal clean plankton tows, river samples, aerosol leachates, and porewater samples were measured for their iron isotopic composition using a GV Instruments IsoProbe Multi-collector ICPMS. The Fe isotopic composition of plankton tow samples vared by over 4% (in 56Fe/54Fe). …
-
Colapso gravitacional e estruturação da seção marinha da bacia da Foz do Amazonas no contexto de múltiplos níveis de destacamento
The Amazon deep-sea fan is part of the Foz do Amazonas Basin. It comprises a thick prograding siliciclastic prism (~ 10 km thick) related to the Amazon River input since Upper Miocene (~10 Ma). Gravity-driven deep-water fold-and-thrust belts stand as the most remarkable structures along the margin, …
-
Isotopic constraints on sources and cycling of riverine dissolved inorganic carbon in the Amazon Basin
… (DIC) and CO2 gas are fundamental components of riverine biogeochemical functioning. Amazonian and humid tropical rivers represent a large, neglected source of CO2 to the atmosphere. Carbon isotopes are invaluable tools for examining sources and cycling of inorganic carbon. However, 14C-DIC has …
Page 1 of 2