Rozprawy doktorskie na temat „Eddies”
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Abernathey, Ryan (Ryan Patrick). "Mixing by ocean eddies". Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/70772.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (p. 163-175).
Mesoscale eddies mix and transport tracers such as heat and potential vorticity laterally in the ocean. While this transport plays an important role in the climate system, especially in the Southern Ocean, we lack a, comprehensive understanding of what sets mixing rates. This thesis seeks to advance this understanding through three related studies. First, mixing rates are diagnosed from an eddy-resolving state estimate of the Southern Ocean, revealing a meridional cross-section of effective diffusivity shaped by the interplay between eddy propagation and mean flow. Effective diffusivity diagnostics are then applied to quantify surface mixing rates globally, using a, kinematic model with velocities derived from satellite observations; the diagnosed mixing rates show a rich spatial structure, with especially strong mixing in the tropics and western-boundary-current regions. Finally, an idealized numerical model of the Southern Ocean is analyzed, focusing on the response to changes in win( stress. The sensitivity of the meridional overturning circulation to the wind changes demonstrates the importance of properly capturing eddy mixing rates for large-scale climate problems.
by Ryan Abernathey.
Ph.D.
Cenedese, Claudia. "Baroclinic eddies over topography". Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624104.
Pełny tekst źródłaAthanasiadis, Panos J. "Teleconnections and transient eddies". Thesis, University of Reading, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.493965.
Pełny tekst źródłaHaines, K. "Long-lived eddies in planetary atmospheres". Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/38343.
Pełny tekst źródłaAn, Byoung Woong. "Modelling outflows, coastal currents and eddies". Thesis, University College London (University of London), 2004. http://discovery.ucl.ac.uk/1446475/.
Pełny tekst źródłaBurns, Helen. "Diabatic eddies in idealised channel models". Thesis, University of Southampton, 2018. https://eprints.soton.ac.uk/424757/.
Pełny tekst źródłaHall, C. "Cyclonic Eddies in the Cape Basin". Master's thesis, University of Cape Town, 2008. http://hdl.handle.net/11427/6586.
Pełny tekst źródłaRing, Michael J. 1979. "The role of eddies in buoyancy flux". Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/114316.
Pełny tekst źródłaThesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2001.
Cataloged from PDF version of thesis.
Includes bibliographical references (page 35).
This thesis explores the role of eddies in determining the stratification of the ocean through a laboratory experiment. The experiment uses a dual-tank apparatus, with a smaller tank sitting inside the larger tank. Both tanks sit on a rotating turntable, which simulates the rotation of Earth. During the experiment, salty water is pumped from the outer tank through small holes in the base of the inner tank, which is initially filled with fresh water. The evolution of the dense fluid in the inner tank is observed, with particular regard to the number of eddies that form. These observations are checked against theoretical predictions, derived from analysis of buoyancy flux, for the number of eddies expected to form.
by Michael J. Ring.
S.B.
Lewis, Stephen Richard. "Long-lived eddies in the atmosphere of Jupiter". Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329956.
Pełny tekst źródłaMiltenberger, Alexander Reid. "The effects of ocean eddies on tropical cyclones". Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78538.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (p. 40-41).
The purpose of this study is to understand the interactions of tropical cyclones with ocean eddies. In particular we examine the influence of a cold-core eddy on the cold wake formed during the passage of Typhoon Fanapi (2010). The three-dimensional version of the numerical Price-Weller-Pinkel (PWP) vertical mixing model has previously been used to simulate and study the cold wakes of Atlantic hurricanes. The model has not been used in comparison with observations of typhoons in the Western Pacific Ocean. In 2010 several typhoons were studied during the Impact of Typhoons on the Ocean in the Pacific (ITOP) field campaign and Fanapi was particularly well observed. We use these observations and the 3DPWP to understand the ocean cold wake generated by Fanapi. The cold wake of Fanapi was advected by a cyclonic eddy that was south of the typhoon track. The 3DPWP model outputs with and without an eddy are compared with observations made during the field campaign. These observations are compared to model outputs with eddies in a series of positions right and left of the storm track in order to study effects of mesoscale eddies on ocean vertical mixing in the cold wake of typhoons.
by Alexander Reid Miltenberger.
S.M.
Jordan, Stephen Arthur. "The large-eddy simulation of incompressible flows in simple and complex geometries". Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-10022007-145351/.
Pełny tekst źródłaDoddi, Sai Kumar. "Validation of detached eddy simulation using LESTool for homogenous turbulence". Lexington, Ky. : [University of Kentucky Libraries], 2004. http://lib.uky.edu/ETD/ukymeen2004t00143/Sai%5FThesis.pdf.
Pełny tekst źródłaTitle from document title page (viewed June 21, 2004). Document formatted into pages; contains xii, 117 p. : ill. Includes abstract and vita. Includes bibliographical references (p. 113-116).
Carpenter, Glen H. "Surface circulation associated with the Mindanao and Halmahera Eddies". Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/27297.
Pełny tekst źródłaAdcock, Susan T. "A parameterisation of geostrophic eddies over variable bottom topography". Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314318.
Pełny tekst źródłaGunn, Kathryn Louise. "Time-lapse acoustic imaging of oceanic fronts and eddies". Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/284560.
Pełny tekst źródłaO'Reilly, Bevan James. "Phytoplankton associated with mesoscale eddies in the Mozambique Channel". Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1010967.
Pełny tekst źródłaHalo, Issufo F. M. "The Mozambique Channel eddies : characteristics and mechanisms of formation". Doctoral thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/6477.
Pełny tekst źródłaIncludes bibliographical references.
The model outputs and the satellite data have shown a number of cyclonic and anticyclonic eddies being generated within the Mozambique Channel. The eddies were identified using a newly designed eddy detection algorithm. The algorithm has shown that cyclonic eddies appeared to be more ubiquitous than the anticyclonic and had a single mode sizedistribution. On the other hand, the anticyclonic eddies seemed to have a favorite site for their formation, and have shown a bi-modal size-distribution.
Pannala, Sreekanth. "On large eddy simulations of reacting two-phase flows". Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/11978.
Pełny tekst źródłaZhou, Long. "Mesoscale variability and Lagrangian statistics in the tropical North Atlantic /". View online ; access limited to URI, 2009. http://digitalcommons.uri.edu/dissertations/AAI3401129.
Pełny tekst źródłaDe, Bruyn Kops Stephen M. "Numerical simulation of non-premixed turbulent combustion /". Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/7140.
Pełny tekst źródłaLilly, Jonathan M. "Observations of the Labrador Sea eddy field /". Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/11041.
Pełny tekst źródłaBulhoes, de Morais Cesar Reinert. "On the Evolution of Cyclonic Eddies along the Florida Keys". Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_theses/70.
Pełny tekst źródłaJaimes, Benjamin. "On the Response to Tropical Cyclones in Mesoscale Oceanic Eddies". Scholarly Repository, 2009. http://scholarlyrepository.miami.edu/oa_dissertations/342.
Pełny tekst źródłaRoberts, Malcolm. "Investigation of the role of ocean eddies and their parameterization". Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389514.
Pełny tekst źródłaArbic, Brian K. "Generation of mid-ocean eddies : the local baroclinic instability hypothesis". Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/53047.
Pełny tekst źródłaIncludes bibliographical references (p. 284-290).
by Brian Kenneth Arbic.
Ph.D.
Pankratov, Kirill Konstantinovich. "Influence of topography on the dynamics of baroclinic oceanic eddies". Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/55020.
Pełny tekst źródłaIncludes bibliographical references (leaves 187-190).
by Kirill Konstantinovich Pankratov.
Ph.D.
PeÌrez, PeÌrez Edgar. "Heat transport by baroclinic eddies : evaluating eddy parameterizations for numerical models". Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442945.
Pełny tekst źródłaBuck, Justin James Henry. "Eddies and instabilities in downslope flows in the Weddell Sea, Antarctica". Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.507219.
Pełny tekst źródłaWilson, Christopher. "The role of mesoscale eddies and its representation in numerical models". Thesis, University of Liverpool, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.484268.
Pełny tekst źródłaTielking, Terrance A. "Wind forcing of eddies and jets in the California current system". Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/23147.
Pełny tekst źródłaWilliams, R. G. "The influence of air-sea interaction on ocean synoptic-scale eddies". Thesis, University of East Anglia, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377713.
Pełny tekst źródłaMackenzie, Beverley Anne. "On the primary productivity potential for Lagrangian particles in mesoscale eddies". Thesis, University of Liverpool, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272743.
Pełny tekst źródłaSinha, Bablu. "The influence of mesoscale eddies and topography on southern ocean flow". Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239650.
Pełny tekst źródłaFox-Kemper, Baylor 1973. "Eddies and friction : removal of vorticity from the wind-driven gyre". Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/39405.
Pełny tekst źródłaThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (p. 299-310).
Inertial terms dominate the single-gyre ocean model and prevent western-intensification when the viscosity is small. This occurs long before the oceanically-appropriate parameter range. It is demonstrated here that the circulation is controlled if a mechanism for ultimate removal of vorticity exists, even if it is active only in a narrow region near the boundary. Vorticity removal is modeled here as a viscosity enhanced very near the solid boundaries to roughly parameterize missing boundary physics like topographic interaction and three dimensional turbulence over the shelf. This boundary-enhanced viscosity allows western-intensified mean flows even when the inertial boundary width is much wider than the frictional region because eddies flux vorticity from within the interior streamlines to the frictional region for removal. Using boundary-enhanced viscosity, western-intensified calculations are possible with lower interior viscosity than in previous studies. Interesting behaviors result: a boundary-layer balance novel to the model, calculations with promise for eddy param- eterization, eddy-driven gyres rotating opposite the wind, and temporal complexity including basin resonances.
(cont.) I also demonstrate that multiple-gyre calculations have weaker mean circulation than single-gyres with the same viscosity and subtropical forcing. Despite traditional understanding, almost no inter-gyre flux occurs if no-slip boundary conditions are used. The inter-gyre eddy flux is in control only with exactly symmetric gyres and free slip boundaries. Even without the inter-gyre flux, the multiple-gyre circulation is weak because of sinuous instabilities on the jet which are not present in the single-gyre model. These modes efficiently flux vorticity to the boundary and reduce the circulation without an inter-gyre flux, postponing inertial domination to much smaller viscosities.
by Baylor Fix-Kemper.
Ph.D.
Zhou, Shuyntai. "The role of large-scale atmospheric eddies in the climate equilibrium". Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/17291.
Pełny tekst źródłaDoddridge, Edward. "Influence of eddies on vertical transport and nutrients in subtropical gyres". Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:9ca650eb-fa96-4807-ba78-44b838484334.
Pełny tekst źródłaWardle, Richard M. "Representation of eddies in climate models by a potential vorticity flux". Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/58540.
Pełny tekst źródłaIncludes bibliographical references (p. 170-177).
This thesis addresses the parameterization of the heat and momentum transporting properties of eddy motions for use in three-dimensional, primitive equation, z-coordinate atmosphere and ocean models. Determining the transport characteristics of these eddies is fundamental to understanding their effect on the large-scale ocean circulation and global climate. The approach is to transform the primitive equations to yield the altered 'transformed Eulerian mean' (TEM) equations. The assumption is made that the eddy motions obey quasigeostrophic dynamics while the mean flow obeys the primitive equations. With this assumption, the TEM framework leads to the eddies appearing as one term, which acts as a body force in the momentum equations. This force manifests itself as a flux of potential vorticity (PV) - a quantity that incorporates both eddy momentum and heat transporting properties. Moreover, the dynamic velocities are those of the residual mean circulation, a much more relevant velocity for understanding heat and tracer transport. Closure for the eddy PV flux is achieved through a flux-gradient relationship, which directs the flux down the large scale PV gradient. For zonal flows, care is taken to ensure that the resulting force does not generate any net momentum, acting only to redistribute it. Neglect of relative vorticity fluxes in the PV flux yields the parameterization scheme of Gent and McWilliams. The approach is investigated by comparing a zonally-averaged parameterized model with a three dimensional eddy-resolving calculation of flow in a stress-driven channel. The stress at the upper surface is communicated down the water column to the bottom by eddy form drag. Moreover, lateral eddy momentum fluxes act to strengthen and sharpen the mean flow, transporting eastward momentum up its large scale gradient. Both the vertical momentum transfer and lateral, upgradient momentum transfer by eddies, are captured in the parameterized model. The advantages of this approach are demonstrated in two further zonal cases: 1) the spin-down of a baroclinic zone, and 2) the atmospheric jet stream. The time mean TEM approach and the eddy PV flux closure are explored in the context of an eddy-resolving closed basin flow which breaks the zonal symmetry. Decomposition of eddy PV fluxes into components associated with advective and dissipative effects suggest that the component associated with eddy flux divergence, and therefore forcing of the mean flow, is mainly directed down the large scale gradient and can be parameterized as before. Thus, the approach can be used to capture eddy transport properties for both zonal mean and time mean flows. The PV flux embodies both the eddy heat and momentum fluxes and so presents a more unified picture of their transferring properties. It therefore provides a powerful conceptual and practical framework for representing eddies in numerical models of the atmsophere and ocean.
by Richard M. Wardle.
Ph.D.
Chien, Yu-Tang. "Change in the Leading Mode of North America's Wintertime Stationary Eddies". DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7587.
Pełny tekst źródłaBadin, Gualtiero. "Are eddies important in the coastal ocean? : a North Sea case study". Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440765.
Pełny tekst źródłaHopkins, Alicia A. "Sensitivity of bottom topography on the dynamics and sound speed structure in the Northern Canary Current System". Thesis, Monterey, Calif. : Naval Postgraduate School, 2006. http://bosun.nps.edu/uhtbin/hyperion.exe/06Dec%5FHopkins.pdf.
Pełny tekst źródłaThesis Advisor(s): Mary L. Batteen. "December 2006." Includes bibliographical references (p. 101-105). Also available in print.
Combes, Vincent Emmanuel. "Intrinsic and Forced Interannual Variability of the Gulf of Alaska Mesoscale Circulation". Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14532.
Pełny tekst źródłaEden, Bethany Rose. "Zooplankton Community Structure in a Cyclonic and Mode-Water Eddy in the Sargasso Sea". W&M ScholarWorks, 2008. http://www.vims.edu/library/Theses/Eden08.pdf.
Pełny tekst źródłaBaker-Yeboah, Sheekela. "Sea surface height variability and the structure of eddies in the South Atlantic Cape Basin /". View online ; access limited to URI, 2008. http://0-digitalcommons.uri.edu.helin.uri.edu/dissertations/AAI3314440.
Pełny tekst źródłaChen, Shuiming. "Vertical structure of mesoscale ocean currents in the Indian Ocean observation, numerical modeling and theory /". Thesis, University of Hawaii at Manoa, 2003. http://proquest.umi.com/pqdweb?index=0&did=765960941&SrchMode=2&sid=8&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1209408688&clientId=23440.
Pełny tekst źródłaYin, Jeffrey Hiapo. "The peculiar behavior of baroclinic waves during the midwinter suppression of the Pacific storm track /". Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/10043.
Pełny tekst źródłaZidikheri, Meelis Juma. "Dynamical subgrid-scale parameterizations for quasigeostrophic flows using direct numerical simulations /". View thesis entry in Australian Digital Theses, 2007. http://thesis.anu.edu.au/public/adt-ANU20090108.112027/index.html.
Pełny tekst źródłaLo, Piccolo Anna. "Arctic ocean submesoscale brine driven eddies: modeling of a sea ice edge front". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Znajdź pełny tekst źródłaYu, Wei. "On the interactions between the atmospheric seasonal mean flow and the transient eddies". Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60457.
Pełny tekst źródłaThe local E-P flux divergence is divided into barotropic and baroclinic components. The 300 mb level is chosen to represent the upper troposphere. The three dominant convergence centres of the baroclinic component are found on the east coast of Asia, near the eastern Pacific and on the east coast of North America. In most areas the barotropic component of the eddy forcing accelerates the mean flow. Near the dateline the barotropic and baroclinic components of the eddy forcing tend to enhance each other, while on the east coast of North American the barotropic and baroclinic components partially cancel each other.
The three-dimensional structure of some general circulation statistics are discussed, and the results are compared with those of earlier studies.
The possible link between the interannual variation of the seasonal mean flow and the transient eddies forcing is discussed. The results show that no obvious correlation exists in our data set, so that no firm conclusions can be reached.
de, Giovanetti Matteo. "Attached eddies in wall-bounded turbulent flows : streak instability and skin-friction generation". Thesis, Imperial College London, 2018. http://hdl.handle.net/10044/1/63818.
Pełny tekst źródłaBrett, Genevieve Elizabeth. "Chaotic advection, mixing, and property exchange in three-dimensional ocean eddies and gyres". Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/117913.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (pages 259-268).
This work investigates how a Lagrangian perspective applies to models of two oceanographic flows: an overturning submesoscale eddy and the Western Alboran Gyre. In the first case, I focus on the importance of diffusion as compared to chaotic advection for tracers in this system. Three methods are used to quantify the relative contributions: scaling arguments including a Lagrangian Batchelor scale, statistical analysis of ensembles of trajectories, and Nakamura effective diffusivity from numerical simulations of dye release. Through these complementary methods, I find that chaotic advection dominates over turbulent diffusion in the widest chaotic regions, which always occur near the center and outer rim of the cylinder and sometimes occur in interior regions for Ekman numbers near 0.01. In thin chaotic regions, diffusion is at least as important as chaotic advection. From this analysis, it is clear that identified Lagrangian coherent structures will be barriers to transport for long times if they are much larger than the Batchelor scale. The second case is a model of the Western Alboran Gyre with realistic forcing and bathymetry. I examine its transport properties from both an Eulerian and Lagrangian perspective. I find that advection is most often the dominant term in Eulerian budgets for volume, salt, and heat in the gyre, with diffusion and surface fluxes playing a smaller role. In the vorticity budget, advection is as large as the effects of wind and viscous diffusion, but not dominant. For the Lagrangian analysis, I construct a moving gyre boundary from segments of the stable and unstable manifolds emanating from two persistent hyperbolic trajectories on the coast at the eastern and western extent of the gyre. These manifolds are computed on several isopycnals and stacked vertically to construct a three-dimensional Lagrangian gyre boundary. The regions these manifolds cover is the stirring region, where there is a path for water to reach the gyre. On timescales of days to weeks, water from the Atlantic Jet and the northern coast can enter the outer parts of the gyre, but there is a core region in the interior that is separate. Using a gate, I calculate the continuous advective transport across the Lagrangian boundary in three dimensions for the first time. A Lagrangian volume budget is calculated, and challenges in its closure are described. Lagrangian and Eulerian advective transports are found to be of similar magnitudes.
by Genevieve Elizabeth Brett.
Ph. D.