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 19 of 19 for “"abrupt climate change"”.
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Abrupt Climate Change and Storm Surge Impacts in Coastal Louisiana in 2050
… impacting the world today are the affects of climate change and global warming. Scientists have been studying the Earth's climate for centuries and have come to agreement that our climate is changing, and has changed, many times abruptly over the history of our planet. This research focuses on …
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Abrupt climate change in the Atlantic Ocean during the last 20,000 years : insights from multi-element analysis of benthic and planktic foraminifera and coupled OA-GCM
… and distribution of the oceanic response to abrupt climate events of the past 20 kyr. The study addressed three major questions: 1) What is the magnitude of high-latitude sea surface temperature and salinity variability during abrupt climate events? 2) Does intermediate depth ventilation …
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Abrupt climate change in the Atlantic Ocean during the last 20,000 years : insights from multi-element analysis of benthic and planktic foraminifera and a coupled OA-GCM
… and distribution of the oceanic response to abrupt Climate events.of the past 20,000 years. The study addressed three major questions: 1) What is the magnitude of high-latitude sea surface temperature and salinity variability during abrupt climate events? 2) Does intermediate depth …
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Nonlinear Amplification of Extreme Climate-Carbon Cycle Events
The geological records of carbon cycle change present significant disruptions at intermittent times, which are often associated with events of abrupt climate change. Despite the variety of mechanisms driving these fluctuations, different disruptions present common characteristics. Through this …
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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)
… a global scale the most destructive episode of abrupt climate 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 …
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Determination of sediment provenance at drift sites using hydrogen isotopes in lipids
Paleoclimate records with sufficient length and temporal resolution to study the occurrence and causal mechanisms of abrupt climate change are exceedingly rare. Rapidly deposited ocean sediments provide the best archive for studying these events through geologic time, but such sites in the open …
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Determination of sediment provenance at drift sites using hydrogen isotopes in lipids
Paleoclimate records with sufficient length and temporal resolution to study the occurrence and causal mechanisms of abrupt climate change are exceedingly rare. Rapidly deposited ocean sediments provide the best archive for studying these events through geologic time, but such sites in the open …
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Advances in the reconstruction of temperature history, physiology and paleoenvironmental change : evidence from light stable isotope chemistry
… or short time intervals. The investigation of climate variation (e.g., seasonality, El Niño, deglaciation), animal migration and physiology, and disturbance ecology (e.g., fire, flooding) benefits from the recovery of proxy information at decadal to subannual resolutions. The type of material …
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Forcings on Coccolithophore Evolution and Assemblage Changes
… also in affecting fundamental components of the climate system. However, our understanding of the factors driving microplankton evolution and assemblage changes is still incomplete. Here, I explore how marine microplankton responded to drivers such as subaerial volcanism and abrupt climate …
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Presencing Place: an enquiry into the knowing and shaping of place through expanded art practices
… Dawn Walk 6.30am; walking through two periods of abrupt climate change 183ma (million years ago) and our current time, Gesture 28 Intersections of time; or gilding the shadow of a small weed with gold leaf at solar noon, Gesture 45 Solar Noon Shadows. The commentary introduces the territory of …
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Terrestrial Impacts of the Central Atlantic Magmatic Province on western Pangea
<p>Earth's climate is predominantly controlled by the fluctuation of greenhouse gases, specifically CO2 and CH4, over geologic time. The late Triassic is a period of abrupt climate change that has been associated with a disruption to the global carbon cycle due the emplacement of the Central …
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Development of biomarker-based proxy methods for reconstructing the late Quaternary sea ice history in the Barents Sea
… for paleo-reconstructions encompassing both abrupt and gradual climate change. Multivariate analysis of HBIs in Barents Sea surface sediments characterised by contrasting overlying sea ice conditions revealed the potential of classification trees (CTs) as a robust method of biomarker-based …
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Investigations of temporal changes in climate and the geomagnetic field via high-resolution radiocarbon dating
Geological archives have shown periods of abrupt climate change in the relatively stable Holocene epoch (last ca. 11 700 years). One of these periods was around 2800 cal BP. Several records, mainly from Europe, reveal a shift towards wetter, cooler and windier conditions. There are, however, …
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Reflection seismic investigations of the Canadian Beaufort Sea margin, Arctic Ocean
… past ice-sheet configuration and may have forced abrupt climate change through transport of ice and freshwater to the Arctic Ocean. The objectives of this work are to constrain the number of ice advances through each trough, to discuss the possible timing of these events, and to examine the impact …
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Resolving abrupt palaeoenvironmental changes in a lake sediment sequence from Ioannina, northwest Greece
… of ecological responses to Quaternary climate change. Lake Ioannina (NW Greece) is one such archive, with a vegetation record which spans multiple glacial-interglacial cycles. This PhD builds upon earlier work at Ioannina, seeking to characterise last glacial millennial-scale …
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HUMAN RESPONSES TO CLIMATE CHANGE DURING THE YOUNGER DRYAS IN NORTHWEST EUROPE
… to which hunter-gatherer mobility strategies are changed by abrupt climate change events by monitoring changes in lithic assemblage compositions through the Pleistocene/Holocene Transition, from ca. 14,000 cal BP to 10,000 cal BP in northwest Europe, with a focus on the Younger Dryas Stadial …
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Biogeochemical Cycling and Paleoenvironmental Reconstructions of the Toarcian Oceanic Anoxic Event from Western North America
… to have resulted in significant environmental change. Associated with this interval was the widespread deposition of organic-rich sediments, carbon cycle and seawater chemistry changes, global warming, the development of marine anoxia, and major extinction events. The majority of studies of …
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Geochemistry of karst deposits in Borneo detailing hydroclimate variations in the Warm Pool across the late Pleistocene
… ocean-atmospheric system causes global scale climate anomalies, most evident in the El Niño-Southern Oscillation’s coupled climate feedbacks. Despite being an area of high interest, many questions still remain regarding the west Pacific warm pool’s response to external forcing, particularly …
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Identification of variability in sub-arctic sea ice conditions during the Younger Dryas and Holocene
… during the late Younger Dryas. A shift in the climate towards ice-free conditions was recorded in northern Norway during the early Holocene (ca. 11.5 – 7.2 cal. kyr BP). Milder conditions were also observed during the Holocene in the western Barents Sea, with three main climate periods …