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 17 of 17 for “"Ocean mixed layer"”.
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Cloud effects on ocean mixed layer in the northeast Pacific Ocean.
… to examine the effects of clouds on the ocean mixed layer, both short-term and seasonal. It utilized data collected at Ocean Station Papa in the northeast Pacific. Two numerical modeling simulations were performed (i.e., with variable cloud and with variable precipitation). The results …
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Inferring ocean circulation during the Last Glacial Maximum and last deglaciation using data and models
… This thesis combines global models and paleoceanographic observations to constrain the ocean’s role in storing and transporting heat, salt, and other tracers during this time, with implications for understanding how the modern ocean works and how it might change in the future. • By combining …
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Inferring ocean circulation during the last glacial maximum and last deglaciation using data and models
… This thesis combines global models and paleoceanographic observations to constrain the ocean's role in storing and transporting heat, salt, and other tracers during this time, with implications for understanding how the modem ocean works and how it might change in the future. -- By combining …
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Modelling dispersion and mixing in geophysical flows
… porous rocks, turbulent mixing in the surface layer of the ocean, and mixing in turbulent starting plumes. In chapters 2, 3 and 4, we study the longitudinal dispersion of a passive tracer by a two-dimensional pressure-driven flow through a layer of heterogeneous porous rock which is bounded …
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Terrestrial sources and sinks of atmospheric methyl bromide : three-dimensional modeling of tropospheric abundance and sensitivities
… observed winds, coupled to a simple model of the ocean mixed layer. All of the resulting scenarios overestimate the observed zonal gradient, with interhemispheric ratios ranging from 1.39 to 1.60. In the absence of unknown sources, model results imply a biomass burning source near the upper limit …
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Modeling sea surface height in the Gulf of Mexico
… altimetry data. SSH is a signal of the upper ocean mixed layer heat content and is an input for hurricane intensity models. A significant ocean feature in the Gulf of Mexico is the Loop Current (LC) which sheds warm eddies into the Gulf of Mexico at irregular intervals, which adds to the …
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An inverse approach to understanding benthic oxygen isotope records from the last deglaciation
… analog for the evolution of future climate. The ocean plays a key role in the modern climate system by storing and transporting heat, salt, and nutrients, but its role during the last deglaciation remains uncertain. Prominent signals of the last deglaciation in the ocean are a gradual warming and …
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Numerical Simulations of Oil Spills and Wind Turbine Flows for Applications in Offshore Environmental Sustainability
… the world with its severe adverse impact on the ocean ecosystem and the human society around the Gulf of Mexico. On the other hand, the technological advancement of floating turbines has made offshore wind a feasible resource to help supply the high energy demand. This doctoral dissertation …
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An inverse approach to understanding benthic oxygen isotope records from the last deglaciation
… analog for the evolution of future climate. The ocean plays a key role in the modern climate system by storing and transporting heat, salt, and nutrients, but its role during the last deglaciation remains uncertain. Prominent signals of the last deglaciation in the ocean are a gradual warming and …
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Understanding the role of stochastic atmospheric forcing in tropical Pacific decadal variability and ENSO modulation
… of stochastic atmospheric forcing by the ocean mixed layer. However, it remains unclear how the extratropical signal propagates into the tropical Pacific and forms a basin-wide anomaly pattern and how the resultant tropical Pacific decadal variability (TPDV) interacts with the El …
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Mechanisms of Subantarctic Mode Water re-emergence in a hybrid-coordinate global GCM
… production over large proportions of the world ocean. For this purpose, the HYbrid isopycnic-cartesian Coordinate Ocean general circulation Model (HYCOM) is configured to simulate the global ocean circulation for timescales of up to centuries. After development and validation of the model, a …
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Quantitative modelling of spatial variability in the north Atlantic spring phytoplankton bloom
… forced model of the annual plankton cycle in the ocean mixed layer. The model is optimised to fit survey data from the eastern North Atlantic, collected over a 1500 x 1500 km area between 39N and 54N, from April-June 1991, establishing the feasibility of using spatially distributed point-in-time …
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Ice shelf-ocean interactions in a general circulation model : melt-rate modulation due to mean flow and tidal currents
Interactions between the ocean circulation in sub-ice shelf cavities and the overlying ice shelf have received considerable attention in the context of observed changes in flow speeds of marine ice sheets around Antarctica. Modeling these interactions requires parameterizing the turbulent boundary …
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On the evolution & equilibration of submesoscale fronts
… and O(1) Rossby numbers are common in the upper ocean. These fronts are associated with large vertical transport and are hotspots for biological activity. Submesoscale fronts are susceptible to symmetric instability — a form of convective–inertial instability which occurs when the potential …
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Ice shelf-ocean interactions in a general circulation model : melt-rate modulation due to mean flow and tidal currents
Interactions between the ocean circulation in sub-ice shelf cavities and the overlying ice shelf have received considerable attention in the context of observed changes in flow speeds of marine ice sheets around Antarctica. Modeling these interactions requires parameterizing the turbulent boundary …
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Modelling turbulence and transport of buoyant material in the ocean surface mixed layer
The ocean mixed layer (OML) is a significant and dynamically active part of the ocean which plays an important role in climate variability. Here, atmospheric processes such as winds, heat fluxes or density differences drive the generation of small-scale, three-dimensional turbulence and mixing of …
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Mixed layer nitrogen cycling in the Southern Ocean: seasonality, kinetics, and biogeochemical implications
… recharge is central to the role of the Southern Ocean in setting atmospheric CO2. However, active cycling of nitrogen (N) in the seasonally-varying mixed layer – including the production of ammonium and its subsequent removal via phytoplankton uptake and nitrification (i.e., the oxidation of …