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.
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Showing 1 to 20 of 189 for “"South Atlantic"”.
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An analysis of variability in the South Atlantic
In this thesis the variability of the South Atlantic climate is investigated. In order to account for both large and regional scales, two ocean models are applied. An ocean general circulation model, forced with the National Centre for Environmental Prediction / National Centre for Atmospheric …
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Agulhas retroflection rings in the South Atlantic Ocean
… transfer of heat, salt and energy from the South Indian into the South Atlantic Ocean. Few hydrographic measurements have been collected from Agulhas rings in the South Atlantic Ocean and their characteristics and influence on the waters of the Cape Basin through which they pass are thus …
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Insights into Glacial Terminations from a South Atlantic Perspective
… timescales. On this topic, the Southern Ocean has long been considered to be an important player in regulating atmospheric CO\textsubscript{2 } on glacial-interglacial timescales. This thesis investigates some of the hypothesised drivers of changes in atmospheric …
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On the subtropical front in the South Atlantic Ocean
The region surrounding the Tristan da Cunha Archipelago has received little attention to date due to its remote location. An extensive revision of previous literature covers the majority of oceanographic research undertaken in the region of interest. New satellite derived oceanographic data sets …
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Labour, Environment and Empire in the South Atlantic (1780-1860)
The South Atlantic Ocean and its islands (Saint Helena, Tristan da Cunha, Ascension) were a periphery of the British Empire. Nevertheless this region faced a dramatic transformation during the Global Age of Revolutions (1780-1830) and moved from being a transition zone between Europe and Asia into …
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Liberated Africans and Law in the South Atlantic, c. 1839-1871
… the Brazilian slave trade, the largest in the Atlantic world. It focuses on case studies from Sierra Leone, South Africa, and Brazil, which were connected by the legal regime against the slave routes from South East Africa and West Central Africa to Brazil. Legal agents implemented bilateral …
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Magmatism in southern Uruguay and the early rifting of the South Atlantic
… within the N60° E trending Santa Lucia Basin, southern Uruguay which lies at the southern margin of the Parana - Etendeka continental flood basalt province. New Ar- Ar ages of the basalts range from 134 to 130 Ma while ages from the rhyolites range from 130 to 124 Ma. This magamtism was …
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Marine cycling of neodymium in the South Atlantic and the Southern Oceans
… elements, by determining Nd isotopes in the South Atlantic Ocean and the Southern Oceans, which are critical locations in the global ocean circulation system. It consists of three projects focusing on area of the South Atlantic, the Bellingshausen Sea, and the Antarctic sub-ice shelf …
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Evaluation of an eddy resolving HYCOM simulation in the South Atlantic Ocean
The South Atlantic Ocean acts as a key region of ocean teleconnections and water mass transformation, directly transporting waters from the Southern, Pacific and Indian Oceans towards the North Atlantic and feeding the upper branch of the Atlantic Meridional Overturning Circulation. To date, this …
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Southern experiences in dialogue: a case study on South Atlantic knowledge production
Signature to be removed
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Estimating Management Uncertainty for Marine Fisheries in the South Atlantic United States
… predictions of managed fish species in the South Atlantic to post-season estimates and investigated the existence of management uncertainty, and evaluated its magnitude and direction. Results indicate that the magnitude of management uncertainty for some stocks in the region may be …
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Population Ecology of Invasive Lionfish (Pterois volitans/miles) in the South Atlantic Bight
… predator that are now established in the Western Atlantic, Caribbean Sea and Gulf of Mexico. Studies that have documented impacts of lionfish suggest they can reduce fish recruitment and native species biomass by up to 80%. Research on lionfish impacts, biology and ecology is heavily focused in …
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Inducible Chemical Defenses in Temperate Reef Sponges of the South Atlantic Bight, U.S.A.
… defenses. To investigate if reef sponges in the South Atlantic Bight employ inducible chemical defenses, I tested two predictions with Ircinia campana, I. felix, and Aplysina fulva. First, concentrations of antipredator compounds should covary with the abundance of sponge predators. Second, …
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Holocene climate and environmental dynamics on the Tristan da Cunha island group, South Atlantic
… record of past climate changes from the central South Atlantic. Peat and lacustrine sediment sequences were retrieved from the Tristan da Cunha island group in the central South Atlantic. These sequences were analysed with a multiproxy approach including pollen analysis, measurements of total …
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Particle export and flux through the Mesopelagic in the high-latitude north and South Atlantic
… ocean iron fertilisation experiment in the South Atlantic.<br/><br/>In the Iceland Basin, export during a spring diatom bloom was tracked using Lagrangian sediment traps and thorium-234 disequilibria. A large pulse of diatom detritus was exported suddenly at the end of the bloom, probably …
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Sponge Community Structure and Anti-Predator Defenses on Temperate Reefs of the South Atlantic Bight
… anti-predator defenses on temperate reefs in the South Atlantic Bight. Significant differences in the distribution of sponge species, sponge densities, and densities of sponge predators were documented across two adjacent reef habitats. Significant differences also occurred in the distribution of …
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Freedom’s edge: Enslaved people, manumission, and the law in the eighteenth-century South Atlantic world
… Edge” explores how enslaved people in the South Atlantic world engaged with the law to achieve their manumission, or legal freedom. Drawing on freedom letters, petitions, legal suits, and other kinds of evidence from the eighteenth century, my analysis focuses on enslaved peoples’ social …
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Marine geophysical applications of seasat altimetry and the lithospheric structure of the South Atlantic Ocean
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1987.
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