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 9 of 9 for “"Volcanic Emissions"”.
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VOLCANIC EMISSIONS AND DISTAL PALAEOENVIRONMENTAL IMPACTS IN NEW ZEALAND
… non-climatic effects on the environment from volcanic ash fall and toxic emissions outside the blast zone of a volcanic eruption. These effects are determined from palynological and geochemical changes following tephra fall at a range of sites across the North Island of New Zealand which were …
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Quantifying future volcanic impacts on climate projections and their uncertainties using stochastic volcanic emissions
Explosive volcanic eruptions can inject sulfur dioxide into the stratosphere, forming sulfate aerosols that alter Earth’s radiative balance leading to abrupt climatic changes. Despite the importance of volcanic stratospheric aerosols for climate, current climate projection studies rely on two …
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Modelling the atmospheric chemistry of volcanic plumes
… system. Once released into the atmosphere, volcanic emissions rapidly undergo a complex series of chemical reactions. This thesis seeks to further the understanding of such processes by both observation and numerical modelling. I have adapted WRF-Chem to model passive degassing from Mount …
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Volatile chemistry, and nitrogen sources and fluxes, in subduction zones : insights from the Izu-Bonin-Mariana Arc
… of volatiles being emitted from the active volcanic front of the Izu-Bonin-Mariana (IBM) arc was undertaken in order to investigate the sources, flux, and mass balance of nitrogen across this 'cool' convergent margin. The IBM arc is an ideal location to study volatile recycling in subduction …
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The Tambora project: an atmospheric simulation and historical evaluation of the Mount Tambora eruption and its impacts on global climate and society (1815-18)
… change in the modern historical record. The volcanic sulfate veil produced by the Tambora eruption in the period 1815-18 depressed temperatures and disrupted storm tracks in monsoonal India, thereby likely initiating the first global cholera pandemic, while famine, refugeeism and civil unrest …
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CO2 Adsorption On Volcanic Ash: Net Contribution Of Volcanic Eruptions To The Global Carbon Cycle
… a small percentage of the terrestrial co2 sink. Volcanic ash is virtually free of co2 when erupted and has a high surface area resulting in a high capacity for co2 adsorption. Volcanism is commonly assumed to be only a source of co2, but pyroclastic eruptions can also potentially serve as a sink. …
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Crust-mantle interactions and connections with the geodynamic system in the origin and circulation of fluids in the Comoros Archipelago - Indian Ocean
… leader of the Commission on the Chemistry of Volcanic Gases (CCVG), who referred to volcanic gas emissions as a “telegram from the Earth’s interior”. This research represents an attempt to read and interpret as much as possible from such complex messages with regard to an area of extreme …