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 67 for “"ocean dynamics"”.
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Design of interactive maps for ocean dynamics data
… modeling and forecasting systems for ocean dynamics necessitate robust and efficient data delivery and visualization techniques. The multi-disciplinary simulation, estimation, and assimilation systems group at MIT (MSEAS) focuses on capturing and predicting diverse ocean dynamics, …
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Residual overturning circulation and its connection to Southern Ocean dynamics
… for determining whether the Atlantic or Pacific oceans experience deep convection. I used a two layered model and a rectangular single-basin model to show that the basin width, in combination with scalings for the overturning circulation make the overturning relatively weaker in the wider basin, …
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Upper ocean dynamics during the LOTUS and TROPIC HEAT experiments
… currents on the vertical structure of the upper ocean during two recent observational programs: the Long Term Upper Ocean Study (LOTUS) and the TROPIC HEAT experiments. The LOTUS experiment took place in the northwest Atlantic Ocean, a mid-latitude region away from strong mean currents, and …
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Equatorial ocean dynamics impacting upwelling west of the Galápagos Archipelago
The Galápagos Cold Pool (GCP) is a region of anomalously cold sea surface temperature (SST) just west of the Galápagos Archipelago. Modeling studies have shown that the GCP is maintained by wind- and current-driven upwelling. The Galápagos Archipelago lies on the equator, in the path of the Pacific …
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The role of ocean dynamics within tropical Atlantic climate variability
… quantifies the response of the upper equatorial ocean to large scale wind forcing. To facilitate the Atlantic-Pacific comparison, available potential energy values are derived from the temperature and salinity fields of two global ocean models.
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Residual overturning circulation and its connection to Southern Ocean dynamics
… for determining whether the Atlantic or Pacific oceans experience deep convection. I used a two layered model and a rectangular single-basin model to show that the basin width, in combination with scalings for the overturning circulation make the overturning relatively weaker in the wider basin, …
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Upper ocean dynamics during the LOTUS and TROPIC HEAT experiments
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1991.
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Equatorial ocean dynamics impacting upwelling west of the Galápagos Archipelago
The Galápagos Cold Pool (GCP) is a region of anomalously cold sea surface temperature (SST) just west of the Galápagos Archipelago. Modeling studies have shown that the GCP is maintained by wind- and current-driven upwelling. The Galápagos Archipelago lies on the equator, in the path of the Pacific …
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Neural Operator Models as Applied to Fluid Flow Systems and Real Ocean Dynamics
… multiple domains including the atmospheric and oceanic ones, and in general, the larger fluids community. The present work investigates the possible effectiveness of such deep neural operator models for reproducing and predicting classic fluid flows and simulations of realistic ocean dynamics. …
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Investigating Mesoscale, Submesoscale, and Mixing Ocean Dynamics in the Mozambique Channel Using Seismic and Simulation Datasets
… heat, carbon, and nutrients throughout the ocean, impacting ocean circulation and climate. As the bridge between geostrophic balanced mesoscale eddies and smaller scale turbulent dissipation, submesoscale processes (10 m–10 km, e.g. fronts, filaments, vortices, and wakes) facilitate the …
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Influence of Mesoscale Eddies on the Deep Ocean Dynamics over the East Pacific Rise near 10N
Mesoscale eddies are ubiquitous in the World Ocean and dominate the energy content on subinertial time scales. However, due to a lack of in situ data from the deep ocean, most previous work has focused on signals near the sea-surface, that is, the signals of mesoscale eddies in the deep ocean and …
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Atlantic Ocean circulation at the Last Glacial Maximum : inferences from data and models
This thesis focuses on ocean circulation and atmospheric forcing in the Atlantic Ocean at the Last Glacial Maximum (LGM, 18-21 thousand years before present). Relative to the pre-industrial climate, LGM atmospheric CO2 concentrations were about 90 ppm lower, ice sheets were much more extensive, and …
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Atlantic Ocean circulation at the last glacial maximum : inferences from data and models
This thesis focuses on ocean circulation and atmospheric forcing in the Atlantic Ocean at the Last Glacial Maximum (LGM, 18-21 thousand years before present). Relative to the pre-industrial climate, LGM atmospheric CO₂ concentrations were about 90 ppm lower, ice sheets were much more extensive, and …
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Air-sea interaction at contrasting sites in the Eastern Tropical Pacific : mesoscale variability and atmospheric convection at 10°N
The role of ocean dynamics in driving air-sea interaction is examined at two contrasting sites on 125°W in the eastern tropical Pacific Ocean using data from the Pan American Climate Study (PACS) field program. Analysis based on the PACS data set and satellite observations of sea surface …
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Study of the Origins of the Sigma-0 Blooms
… mean sea level in a way that allows the study of ocean dynamics. The understanding of ocean dynamics is very important in order to study events such as El Nino. Soon after the launch of the TOPEX satellite, some unusually high, but localized, values of the ocean's radar cross section, sigma-0, …
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The impact of increased grid resolution on the mixed layer depth variability in the South Atlantic Ocean and Southern Ocean
The Southern Ocean plays a major role in global climate system. An understanding of Southern Ocean dynamics allows for a better understanding of the carbon cycle and possible future climate conditions. Earth System Models are used to study Southern Ocean dynamics and are currently producing …
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Feedback mechanism in the oceanic carbon cycle
… I designed and implemented a simple atmosphere-ocean coupled carbon cycle model which can be used as a tool to uncover the mechanisms of the interaction between the dynamics of the atmosphere-ocean system and the oceanic reservoir of CO 2 on the 101 to 103 years time scale. The atmosphere-ocean …
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Stratified and stirred : monsoon freshwater in the Bay of Bengal
Submesoscale ocean dynamics and instabilities, with characteristic scales 0.1-10 kin, can play a critical role in setting the ocean's surface boundary layer thickness and associated density stratification. Submesoscale instabilities contribute to lateral stirring and tracer dispersal. These …
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Lagrangian dispersion and deformation in submesoscale flows
… of 1-20 km, are an important element of upper ocean dynamics. These currents play a crucial role in the horizontal and vertical redistribution of tracers, the cascade of tracer variance to smaller scales, and in linking the mesoscale circulation with the dissipative scales. This thesis …
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Stochastic Ocean Forecasting with the Dynamically Orthogonal Primitive Equations
… (DO-PE) for realistic high-resolution stochastic ocean forecasting in regions with complex ocean dynamics. In the first part, we identify and test a streamlined process to create multi-region initial conditions for the DO-PE framework, starting from temporally and spatially sparse historical data. …
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