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 26 for “"deep water formation"”.
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The role of North Atlantic Deep Water formation in the thermohaline circulation
… ocean thermohaline circulation. North Atlantic Deep Water formation is an important component of this system and the role of this process in the ventilation, structure and variability of all the world ocean basins is studied. The production of deep water in the north Atlantic Ocean has profound …
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The response of ocean salinity patterns to climate change : implications for circulation
… ocean salinity arise from the exchange of freshwater between the sea surface and the atmosphere. For a quasi-steady state system, these surface fluxes are balanced by compensating transports of salt in the ocean interior. In a warming climate, the atmosphere holds additional water vapor which …
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Stable Isotopes as Tracers for Freshwater Fluxes into the North Atlantic
… warming. These changes have affected the freshwater balance of the northern North Atlantic and therefore pose a problem to deep water formation in this region, further impacting the global climate. This thesis uses the quasi-conservative properties of oxygen and hydrogen isotopes in watermasses …
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A satellite view of the space-time variability of phytoplankton biomass in the Mediterranean Sea
… influenced by its physical environment, from the water column stratification to the atmospheric input of nutrients, at different space and time scales: from daily to seasonal and interannual, and from hundreds of km to the basin scale. The basin scale interannual variability of phytoplankton has …
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Radiocarbon (Δ14C) and Stable Carbon (δ13C) Isotopic Composition of Dissolved Inorganic Carbon (DIC) in Baffin Bay
… exchange of CO2 and the buffering capacity of seawater allows the oceans to store significant amounts of dissolved inorganic carbon (DIC; ~38,000 GtC). The Arctic Ocean is currently warming at double the rate of the rest of the planet, yet the effect of climate change on the Arctic marine carbon …
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Parameterization of convection in a rotating stratified ocean : comparison of numerical and laboratory experiments with theory
… out in a parameter regime relevant to open-ocean deep convection. We consider the case of convection in a rotating stratified ocean of finite depth. Convection is induced from the surface by extracting buoyancy over a circular area. The external parameters are buoyancy forcing of strength Bo …
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Antarctic Bottom Water in CMIP5 models : characteristics, formation, evolution
… suggest that the properties of Antarctic Bottom Water (AABW) are changing, causing significant steric sea level rise. Understanding the causes of these changes is critical for projections of future sea level, yet previous generations of climate models failed to represent AABW accurately. …
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Cold air outbreaks over the Gulf Stream and implications for the North Atlantic Ocean
… impacting the subpolar regions where oceanic deep convection drives the thermohaline circulation. This study uses an observational data analysis and model experiments with CESM’s Parallel Ocean Processor to examine CAO intensive winters alongside contrasting years of winter warm events to …
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The Evolution and Impact of Weddell Sea Deep Water
… overturning circulation is partially driven by deep water formation along the Antarctic continent, which is strongly modulated by interactions of surface water with the floating ice shelves. These processes are crucial for the evolution of the climate in the past and future, but remain generally …
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The response of ocean salinity patterns to climate change: implications for circulation
… ocean salinity arise from the exchange of freshwater between the sea surface and the atmosphere. For a quasi-steady state system, these surface fluxes are balanced by compensating transports of salt in the ocean interior. In a warming climate, the atmosphere holds additional water vapor which …
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Boundary layer dynamics and deep ocean mixing in Mid-Atlantic Ridge canyons
… mixing and upwelling required to balance the deep-water formation, but are still working to understand the mechanisms and locations—how and where it happens. From observational studies, we know that areas of rough topography are important and the hundreds of Grand-Canyon sized canyons that …
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Strong wind events across Greenland’s coast and their influence on the ice sheet, sea ice and ocean
… to 1000 W m−2, with potential implications for deep water formation. Moreover, the winds advect sea ice away from the coast and out of a major glacial fjord. Simulations of these wind events in Ammassalik with the atmospheric Weather Research and Forecast Model show that mountain wave dynamics …
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Air-Sea CO2 Exchange and Carbon Dynamics in Foxe Basin: Findings from a 2023 Oceanographic Survey
… important in polar oceans, where sea-ice formation releases brine to the water column below and can create dense waters that sink and sequester dissolved carbon into deep waters. Foxe Basin, an inland sea north of Hudson Bay between Baffin Island and Melville Peninsula, is an ideal …
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Boundary layer dynamics and deep ocean mixing in Mid-Atlantic Ridge canyons
… mixing and upwelling required to balance the deep-water formation, but are still working to understand the mechanisms and locations-how and where it happens. From observational studies, we know that areas of rough topography are important and the hundreds of Grand-Canyon sized canyons that …
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Strong wind events across Greenland's coast and their influence on the ice sheet, sea ice and ocean
… to 1000 W m-2, with potential implications for deep water formation. Moreover, the winds advect sea ice away from the coast and out of a major glacial fjord. Simulations of these wind events in Ammassalik with the atmospheric Weather Research and Forecast Model show that mountain wave dynamics …
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Reconstructing deglacial ocean ventilation using radiocarbon : data and inverse modeling
… sediment core located close to deep water formation regions in the western North Atlantic, I show that compared to today, the mid-depth water production in the North Atlantic was probably stronger during the Younger Dryas cold episode, and weaker during other intervals of the …
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Reconstructing deglacial ocean ventilation using radiocarbon : data and inverse modeling
… sediment core located close to deep water formation regions in the western North Atlantic, I show that compared to today, the mid-depth water production in the North Atlantic was probably stronger during the Younger Dryas cold episode, and weaker during other intervals of the …
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Terrigenous Grain-Size Record of the Newfoundland Ridge Contourite Drift, IODP Site U1411: The First Physical Proxy Record of North Atlantic Abyssal Current Intensity during the Eocene-Oligocene Transition
… of the shift to modern AMOC, and especially to deep-water formation in the North Atlantic, has been a topic of ongoing study, with the Eocene-Oligocene Transition (EOT, ~34 Ma) as a potential focal point of this shift. However, the role played by abrupt EOT cooling and Antarctic glaciation in …
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The seasonal and interannual variability of the West Greenland Current system in the Labrador Sea
The Labrador Sea, as one of a few places of deep water formation, plays an important role in the Meridional Overturning Circulation. While the interior of the Labrador Sea, where the deepest convection takes place, is known to experience variability on time scales ranging from days to decades, …
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The seasonal and interannual variability of the West Greenland current system in the Labrador Sea
The Labrador Sea, as one of a few places of deep water formation, plays an important role in the Meridional Overturning Circulation. While the interior of the Labrador Sea, where the deepest convection takes place, is known to experience variability on time scales ranging from days to decades, …
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