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 21 for “"Ocean temperatures"”.
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The future of Narsap Sermia: Documenting the retreat of a tidewater glacier in Southwest Greenland
… events. Once initiated, exposure to elevated ocean temperatures or retreat into a glacial trough further sustained ice loss at the terminus, eventually resulting in a collapse of the glacial front. As of the summer of 2023, Narsap Sermia is still retreating, and the study anticipates that …
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Optimal bioeconomic management of changing marine resources
… exogenous change from factors (such as rising ocean temperatures) outside harvesters' control. In these models, I characterized the profit{or yield{maximizing strategy when harvesting damages habitat in a multispecies fishery, when harvest creates a selective pressure on dispersal, and when …
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Optimal bioeconomic management of changing marine resources
… exogenous change from factors (such as rising ocean temperatures) outside harvesters' control. In these models, I characterized the profit-or yield-maximizing strategy when harvesting damages habitat in a multispecies fishery, when harvest creates a selective pressure on dispersal, and when …
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Inferring ocean circulation during the Last Glacial Maximum and last deglaciation using data and models
… Glacial Maximum (LGM, ~ 20,000 years ago) air temperatures warmed, sea level rose roughly 130 meters, and atmospheric concentrations of carbon dioxide increased. This thesis combines global models and paleoceanographic observations to constrain the ocean’s role in storing and transporting heat, …
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Inferring ocean circulation during the last glacial maximum and last deglaciation using data and models
… Glacial Maximum (LGM, ~ 20,000 years ago) air temperatures warmed, sea level rose roughly 130 meters, and atmospheric concentrations of carbon dioxide increased. This thesis combines global models and paleoceanographic observations to constrain the ocean's role in storing and transporting heat, …
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In situ temperature monitoring of the McMurdo Ice Shelf and ice shelf cavity by fiber-optic distributed temperature sensing
… can assist to further understand ice-ocean interactions. In November 2011, two mooring containing fiber-optic cables for distributed temperature sensing (DTS) were installed at Windless Bight, Antarctica. Temperature was measured every meter along the deployed optical fibers over the …
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Characterization of VIBRIO Parahaemolyticus-Induced Intestinal Inflammation in the Mouse
… recent outbreaks are attributed to a rise in ocean temperatures, a trend that is likely to continue as a result of global warming and emphasizes the need to study the virulence mechanisms of the pathogen. V. parahaemolyticus utilizes a type III secretion system to inject effectors that disrupt …
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Probabilistic Ecosystems Assessment with Reinforcement Learning.
… by the impacts of climate change. Rising ocean temperatures, acidification, and habitat degradation are altering biodiversity distributions, increasing the need for rapid advancements in monitoring techniques. While current data collection techniques yield valuable ecological insights, …
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Combined Effects of Dissolved Oxygen and Temperature On Aerobic Respiration and Respiratory Recovery Responses of the Spioniform Polychaete, <i>Streblospio gynobranchiata</i>, In Relation to Body Size
<p>Elevated surface temperatures exacerbate the threat of hypoxia within coastal ecosystems. These two primary stressors likely interact as they elicit opposing physiological responses from marine organisms. Metabolic depression is typically associated with hypoxia, while metabolic rates increase …
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Assessing techniques to successfully monitor the oceanography of the complex uThukela Marine Protected Area
… for marine life on the Bight. Knowledge of the oceanographic dynamics in the region is essential for understanding the functioning of the ecosystem and the effectiveness of the MPA. This study analysed changes in ocean temperatures at 20 sites along the Bight over a 41-year period using in situ …
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Momentum, mass, heat, and vorticity balances from oceanic measurements of current and temperature
The local dynamics of low-frequency motions in the MODE region are investigated from three arrays of moored measurements of current and temperature. Tests for lowest-order balances of horizontal momentum, mass, heat, heat and vorticity within established errors are carried out. Geostrophic …
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The effects of precipitation and river runoff anomalies in a coupled ice-ocean model of the Arctic
A coupled ice-ocean model of the Arctic Ocean and adjacent seas is developed in order to study the effects of anomalies of precipitation and river runoff on sea ice. A dynamic-thermodynamic sea ice model is coupled to an ocean general circulation model which includes a turbulence closure scheme for …
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Land-ocean contrasts under climate change
… and climate models show a pronounced land-ocean contrast in the responses of surface temperature and the hydrological cycle to global warming: Land temperatures increase more than ocean temperatures, low-level relative humidity increases over ocean but decreases over land, and the water …
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Reproductive success of sea turtles nesting on Wabasso Beach, East-Central Florida
… season, nesting was positively correlated with ocean temperatures (P< 0.05), but not with human beach-side development (P> 0.05). Nesting loggerheads on the study area had an average carapace length of 89.8 cm (S.E.=0.31), and a mean clutch size of 112 eggs (S.E.=1.07). Clutches required an …
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From micro to macro: the benefits and pitfalls of environmental generalism on coral reefs in the Anthropocene
As warming ocean temperatures culminate in large-scale mortality events across tropical, temperate, and deep-water reefs, a shift in environmental norms across marine ecosystems is causing species to expand into otherwise marginal environments. This widespread ecosystem restructuring raises the …
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The Past and Present of Maldivian Coral Reefs
… damage, namely coral mortality from warming ocean temperatures and reef drowning from rising sea levels. In this thesis, I explore the past and present of Maldivian reefs using a combination of historical research, database searches, and field investigations to ask questions about national …
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The modern and glacial thermoclines along the Bahama Banks
As a primary feature of ocean circulation and a key component of the global carbon cycle, changes in the thermocline must be accounted for if we are to understand the processes involved in Quaternary climatic fluctuation. Toward this goal, this thesis contains studies of the modern and glacial …
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Mantle-Melting at High Pressure: Experimental Constraints on Magma Ocean Differentiation
… relevant to the crystallisation of a deep magma ocean, that likely existed during Earth’s accretion. The melting relations of potential magma ocean compositions, such as peridotitic and chondritic bulk compositions, were investigated using multianvil apparatus at pressures of 25-26 GPa and …
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Comparative studies on Macrocystis pyrifera and Ecklonia maxima (Laminariales) in South Africa; investigating the use of M. pyrifera as abalone feed in South African aquaculture and assessing the vulnerability of these two species to Marine Heat Waves
… arguably poses the largest threat to the world’s oceans. Rising ocean temperatures will increase climatic variability, leading to increases in the frequency, duration and intensity of extreme climatic events such as storms and Marine Heat Waves (MHW’s). The second study investigated the impact of …
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Understanding Coastal and Inland Hydrometeorological Hazards Produced by Extratropical and Tropical Cyclones along the East Coast of the United States
<p>As global temperatures continue to rise, the effects of anthropogenic climate change will impact the magnitude and frequency of pluvial, fluvial, and coastal flooding events. If we want to accurately predict changes in these flooding events, we need to fully understand them in the current …
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