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 49 for “"Climatic events"”.
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Paleomagnetic dating of climatic events in Late Quaternary sediments of Lake Baikal (Siberia)
Der Baikalsee ist ein ideales Klimaarchiv für die Mitte Eurasiens. In dieser Arbeit wurde gesteinsmagnetische und paleomagnetische Analysen an hemipelagischen Sequenzen von vier Lokationen analysiert. Die Kerne erreichen ein Alter von maximal 300 ky. In Kombination mit TEM, XRD, XRF und …
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Leaf and canopy responses to forest degradation and extreme climatic events: a remote sensing perspective
… increased greenness and forest resilience to climatic variation. Spectral information was also shown to be effective at detecting the impacts of droughts on leaf traits. Upscaling to the landscape level, the third chapter focuses on methods for estimating aboveground carbon stocks in oil palm …
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The Study of the Indian Ocean Response to Climatic Events Using Satellite Observations and Model Simulations
… variations during numerous phases of IOD events. The dynamics associated with each phase are responsible for producing distinct patterns and strengthen the magnitude and extent of the SSS anomalies during co-occurring ENSO events.</p> <p>The various stages of the MJO propagation across the …
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Crop modeling for assessing and mitigating the impacts of extreme climatic events on the US agriculture system
… zones with high yield potentials, while prevents over-fertilization at zones with low yield potentials.</p>
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The biotic effects of tertiary geoclimatic change in the southern hemisphere
I explore how pre-Quaternary geoclimatic phenomena and geographical heterogeneity influenced sub-continental speciation processes and contemporary biogeographic patterns across the Southern Hemisphere, with particular focus on two regions that have experienced elevated levels of ongoing …
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Evaluating the impact of oceanic/atmospheric teleconnections on historical wildfires in West Virginia (1939--2006)
… often oscillates in phase with year-to-year climatic variability. This climate-fire connection raises the possibility that historical factors inherent in the local ecosystem are overridden by regional climatic events and trends. A robust statistical analysis that utilized correlation, …
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Violence against women in South Africa: An event that disturbs public order in terms of the OAU refugee convention?
… the enumerated refugee producing ground of “events seriously disturbing public order” (ESDPO). Despite its ambiguous nature, the ground of ESDPO is becoming increasingly significant in asylum applications. This thesis acknowledges that ESDPO encompasses a series of international or domestic …
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Vegetation change in response to climate extremes in Limpopo Province, South Africa
… gases (GHGs) in the atmosphere, combined with climatic variability, is likely to bring about extreme climate events, such as tropical storms, heat waves, floods, and droughts. In addition, a small change in the variance and mean of climate parameters might result in a strong shift in the …
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From Wilderness to Wonderment: The Presentation of Irish Heritage, Durrow and Glendalough
… such as economic cycles, political and even climatic events, while continually being restructured by changing aesthetic styles, cultural trends, and technological advancements. As such, each of these influencing factors has been investigated in order to provide a complete representation of …
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ENVIRONMENTAL MODEL ACCURACY IMPROVEMENT FRAMEWORK USING STATISTICAL TECHNIQUES AND A NOVEL TRAINING APPROACH
… environmental behaviors because of extreme events, such as heatwaves, typhoons, droughts, tsunamis, torrential downpour, wind ramps, or hurricanes. In this thesis, we proposed a novel framework to improve environmental model accuracy with a novel training approach. Extreme event detection …
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Monitoring the Knysna forest : species, community and forest responses
… period, although an intensification of extreme climatic events and dynamics indices were recorded for the second period. Significant correlations were found between community diversity measures and forest growth. Trait variables showed insignificant correlations with forest growth and dynamics. …
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Tidally Forced Marine Ice Stream Instabilities and Their Consequences
… loading history and an explanation for all major climatic events of the last 20,000 years in which the resumption of the AMOC after Heinrich event 1 leads to the B{\o}lling-Aller{\o}d warming, which results in increased melt of the Laurentide and provides the source of MWP1A. Similarly, the …
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Deciphering climatic controls on sedimentation in a tectonically active area, Cyprus
… a tectonically active period coeval with major climatic change. Uplift, associated with the activities of the supra-subduction zone to south of island was concomitant with global cooling, the expansion of the Northern Hemisphere Ice Sheets and the Middle Pleistocene Transition. Despite the …
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The Response of High Elevation Wetlands to Past Climate Change, and Implications for the Future
… response of mid-latitude subalpine fens to past climatic events potentially analogous to modern anthropogenic climate change was undertaken. As part of this research, a 4.18 m sediment core was retrieved from Harbison Pond (2651 m elev) near Grand Lake, CO and a 3.12 m peat core was collected …
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Interpretations of Paleoclimate and Speleogenesis from Speleothems in Donnehue's Cave, Indiana
… an increasingly detailed picture of past climatic patterns on a global scale. Some of the most reliable resources for investigating continental paleoclimatic conditions are cave deposits, especially speleothems (stalagmites and flowstones). A major obstacle in the overall understanding of …
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The effects of paleoclimate on the distributions of some North West African Lizards.
… divergence might be related to historical climatic events. Species distribution models (SDMs) were used to quantify a species niche and define the constraining factors that affect that niche. SDMs predict areas of suitable habitat under different climatic scenarios that replicate …
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EFFECTS OF NITROGEN DEPOSITION ON BOREAL BOGS: A THREE YEAR NITROGEN FERTILIZATION AND TRACER EXPERIMENT
… period during 2005 to 2007. These abnormal climatic events could have masked the effects of N deposition on surface Sphagnum moss and microbial communities. This 15N tracer experiment revealed high retention rates of 15N by moss layers as expected. However, retention efficiency of moss …
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Object-Based Coastal Morphological Change Analysis Based on LiDAR and Hurricane Events
Storms are considered one of the rapid climatic events that have a dramatic impact on coastal morphology, hence they require further investigation and quantifying of coastal changes and responses. Light detection and ranging (LiDAR) is the most advanced technology to be widely used by researchers …
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The Evolution and Impact of Weddell Sea Deep Water
… of the sedimentation dynamics under various climatic boundary conditions. This is possible through reconstruction of changes in productivity (by use of Th normalized opal flux, biogenic Ba), vertical vs. horizontal sedimentation processes (Th normalized focusing), bottom water oxygenation …
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Patterns and processes of speciation in North American chorus frogs (Pseudacris)
… In chapter 3, I test geological and climatic hypotheses proposed to drive speciation in North American flora and fauna. By estimating divergence times in the trilling chorus frogs and correlating these divergences with timing of geologic events, I find that marine inundation of the …
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