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 44 for “"submesoscale"”.
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Submesoscale turbulence in the upper ocean
Submesoscale flows, current systems 1–100 km in horizontal extent, are increasingly coming into focus as an important component of upper-ocean dynamics. A range of processes have been proposed to energize submesoscale flows, but which process dominates in reality must be determined observationally. …
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Submesoscale turbulence in the upper ocean
Submesoscale flows, current systems 1-100 km in horizontal extent, are increasingly coming into focus as an important component of upper-ocean dynamics. A range of processes have been proposed to energize submesoscale flows, but which process dominates in reality must be determined observationally. …
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Lagrangian dispersion and deformation in submesoscale flows
Submesoscale currents, with horizontal length scales 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 …
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The evolution and breakdown of submesoscale instabilities
Ocean submesoscales are the subject of increasing focus in the oceanographic literature; with instrumentation now more capable of observing them in situ and numerical models now able to reach the resolution required to more fully capture them. Submesoscales are typified by horizontal spatial scales …
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On the evolution & equilibration of submesoscale fronts
Submesoscale fronts with large horizontal density gradients 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 …
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Lagrangian dispersion and deformation in submesoscale flows
Submesoscale currents, with horizontal length scales 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 …
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Submesoscale coherent vortices in the deep Brazil Basin
… in the deep Brazil Basin, we identify several submesoscale coherent vortices (SCVs). These features contrast with SCV paradigms in that float data indicate approximately equal populations of cyclonic and anticyclonic vortices, and hydrographic data suggest that roughly half exhibit the convex …
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Submesoscale coherent vortices in the deep Brazil Basin
… in the deep Brazil Basin, we identify several submesoscale coherent vortices (SCVs). These features contrast with SCV paradigms in that float data indicate approximately equal populations of cyclonic and anticyclonic vortices, and hydrographic data suggest that roughly half exhibit the convex …
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Submesoscale eddies and their potential for buoyant microplastic accumulation
… promising candidate for this mechanism is the submesoscale eddy – also ubiquitous and characterized by strong vertical velocities. However, investigating the potential of particle redistribution by submesoscale eddy interaction requires structural information about these eddies that is also …
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Submesoscale Biophysical Interactions on the Gulf Stream: Eddies, Fronts, and New Observational Methods
… are linkages between physics and biology at the submesoscale (horizontally O(0.1-10) km, vertically O(.1) km, temporally O(1) day) that could help explain broad scale properties in ocean biology. Persistent fronts of western boundary currents like the Gulf Stream are hotspots for submesoscale …
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Identification and characterisation of submesoscale activity over the continental shelf in the Bay of Biscay
… as fundamental processes in the generation of submesoscale features (a few kilometres to tens of kilometres spatial scale and temporal variability of the order of a day). Consequently, the present study (part of DYMETER project, IFREMER) aims at exploring the development mechanisms of these …
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Investigating Mesoscale, Submesoscale, and Mixing Ocean Dynamics in the Mozambique Channel Using Seismic and Simulation Datasets
Mesoscale and submesoscale structures and turbulent mixing play a vital role in transporting 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 …
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On the Impact of Submesoscale Fronts on Mesoscale Eddies and Biological Productivity in the California Current System
Submesoscale motions are often not resolved in numerical models, although recent studies suggest that they interact with mesoscale processes. This might be particularly relevant for regions like the California Current System (CCS) where mesoscale processes redistribute nutrients and organic matter …
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Time-Lapse Volumetric Seismic Imaging of a Major Oceanic Front and Submesoscale Coherent Vortices at South Atlantic Ocean
… are observed. The largest lens, identified as a submesoscale coherent vortex (SCV), had a maximum diameter of $\sim$ 40 km and a height of $\sim$ 750 m. This SCV is associated with a negative acoustic velocity anomaly that is consistent with a cold fresh water core. Time-lapse imagery reveals its …
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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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Stratified and stirred: Monsoon freshwater in the Bay of Bengal
Submesoscale ocean dynamics and instabilities, with characteristic scales 0.1–10 km, 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 dynamics …
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Modeling ocean transport and its biogeochemical impacts at global, regional, and sub-meso scales
… at an upwelling front in a high-resolution submesoscale-permitting model, we see enhanced vertical velocities that reach 𝒪(100 m d−1). These submesoscale vertical velocities can enhance vertical transport, but they are very difficult to measure. In Chapter 4, we demonstrate the possibility …
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The impact of submesoscales on the stratification dynamics in the Southern Ocean
Submesoscale dynamics O(1-10 km, hours to days) are considered to strongly affect the stratification of the upper ocean. In the Southern Ocean, studies of submesoscale dynamics are biased to regions preconditioned for strong frontal activity and topographical influence. This dissertation considers …
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Understanding variability across the Crossroad transect from 3 years (2013 to 2015) of hydrographic data
… of the study was to examine both mesoscale and submesoscale features that influence the dynamic and variant nature of the Agulhas system. In this study we make use of Ship board Acoustic Doppler Current Profiler (SADCP), Conductivity Temperature and Depth (CTD), Thermosalinograph (TSG) and …
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The influence the oceanographic variability has on the top predators of the sub-Antarctic domain
… thermal water column structure and upper ocean submesoscale processes on the diving behaviour and vertical foraging effort of SAFS. Seasonal and diel trends of foraging effort were investigated and compared to upper ocean thermal structure. Dives were distinguished using the Clustering for Large …
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