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Dissertations / Theses on the topic 'Mesoscale eddy'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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1

Gasset, Nicolas. "Refinement of a mesoscale model for large eddy simulation." Mémoire, École de technologie supérieure, 2013. http://espace.etsmtl.ca/1258/1/GASSET_Nicolas.pdf.

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L’avènement de la technologie éolienne s’est accompagné de l’arrivé à maturité des méthodes pour prédire et prévoir le vent. Toutefois, leurs résultats dépendent encore des sites étudiés, et leurs limites commencent à être atteintes avec l’augmentation de la taille des parcs et des éoliennes modernes. Certains des processus en présence sont maintenant à la limite des microéchelles et des mésoéchelles. Les objectifs de la thèse sont donc d’identifier, d’implémenter et d’évaluer une approche capable de modéliser les écoulements dans la couche limite atmosphérique (CLA) à ces échelles en considér

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2

Solovev, Mikhail A. "Assessment of mesoscale eddy parameterizations for coarse resolution ocean models." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/58517.

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Thesis (Ph. D.)--Joint Program in Physical Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1999.<br>Includes bibliographical references (p. 248-253).<br>Climate simulation with numerical oceanic models requires a proper parameterization scheme in order to represent the effects of unresolved mesoscale eddies. Even though a munber of schemes have been proposed and some have led to improvements in the simulation of the bulk climatological properties, the success of the parameterizations in rep

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3

Meuleners, Michael Joseph. "A numerical study of the mesoscale eddy dynamics of the Leeuwin Current system." University of Western Australia. School of Environmental Systems Engineering, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0134.

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[Truncated abstract] The study of eastern ocean boundary currents has been principally restricted to the Pacific and Atlantic ocean regions. The traditional view of the circulation near eastern ocean boundaries is that upwelling-favourable winds force surface waters offshore, leading to upwelling of cold, nutrient-rich subsurface water at the coast, the formation and offshore advection of a coastal front, and the generation of alongshore currents, generally having an equatorward surface flow and a poleward undercurrent. The eastern ocean boundary system of the southern Indian Ocean, off the we

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4

Powell, Brian S. "Global warming and mesoscale eddy dynamics: An oceanic mechanism for dissipation of heat." Diss., Connect to online resource, 2005. http://wwwlib.umi.com/dissertations/fullcit/3165818.

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Meuleners, Michael Joseph. "A numerical study of the mesoscale eddy dynamics of the Leeuwin Current system /." Connect to this title, 2005. http://theses.library.uwa.edu.au/adt-WU2007.0134.

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6

Jiménez, Cortés Maria Antònia. "Stably stratified atmospheric boundary layer: study trough large-eddy simulations, mesoscale modelling and observations." Doctoral thesis, Universitat de les Illes Balears, 2005. http://hdl.handle.net/10803/9433.

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La capa límit atmosfèrica és l'àrea directament influenciada per la presència de la superfície de la terra i la seva alçada és d'uns centenars de metres a uns pocs quilòmetres. Durant el vespre, el refredament radiatiu estratifica establement l'aire prop del sòl i es forma el que es coneix com a Capa Límit Estable (CLE). D'avui en dia, la CLE és un règim que encara no està prou ben caracteritzat. La turbulència, que no és homogènia ni isòtropa, i la gran importància dels efectes locals com l'orografia, entre d'altres factors, dificulten l'estudi d'aquest règim. Per aquest motiu, la CLE és obje

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MacFadyen, Amoreena. "Observational and modeling studies of the Juan de Fuca Eddy : a mesoscale, topographically-linked upwelling eddy in the northern California Current system /." Thesis, Connect to this title online; UW restricted, 2008. http://hdl.handle.net/1773/11036.

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8

Johnson, Rodney John. "Climatic and mesoscale eddy modulation of the upper ocean at the Bermuda time-series sites." Thesis, University of Southampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274422.

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9

Sweeney, Erin N. (Erin Nicole) 1971. "Monthly variability in upper ocean biogeochemistry due to mesoscale eddy activity in the Saragasso Sea." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/59097.

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Thesis (S.M.)--Joint Program in Chemical Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences and the Woods Hole Oceanographic Institution), 2001.<br>Includes bibliographical references (leaves 65-72).<br>A comparison of monthly biogeochemical measurements made from 1993 to 1995, combined with hydrography and satellite altimetry, was used to observe the impacts of nine eddy events on primary productivity and particle flux in the Sargasso Sea. Measurements of primary production, thorium-234 flux, nitrate+nitrite, and photosynthetic pigments ma

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10

Jaimes, Benjamin. "On the Response to Tropical Cyclones in Mesoscale Oceanic Eddies." Scholarly Repository, 2009. http://scholarlyrepository.miami.edu/oa_dissertations/342.

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Tropical cyclones (TCs) often change intensity as they move over mesoscale oceanic features, as a function of the oceanic mixed layer (OML) thermal response (cooling) to the storm's wind stress. For example, observational evidence indicates that TCs in the Gulf of Mexico rapidly weaken over cyclonic cold core eddies (CCEs) where the cooling response is enhanced, and they rapidly intensify over anticyclonic warm features such as the Loop Current (LC) and Warm Core Eddies (WCEs) where OML cooling is reduced. Understanding this contrasting thermal response has important implications for oceanic f

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11

Pidcock, Rosalind E. M. "Quantifying the role of mesoscale-driven processes of nitrate supply within an Iceland basin eddy dipole." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/195303/.

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This study quantitatively assesses the mesoscale spatial variability in local nitrate transport and the net nitrate flux associated with an open ocean eddy dipole, using novel data from the SUV‐6 ultra‐violet (UV) nitrate sensor integrated with SeaSoar. The innovative, combined system provides high‐resolution (2‐3 km horizontal, ~ 1 m vertical) nitrate data with 0.2 μM accuracy concomitantly with temperature, salinity and dissolved oxygen. This is the first time coincident physical data and measurements of nitrate concentration have been collected at this resolution in a three‐dimensional volu

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12

Krelling, Ana Paula Morais. "The Potiguar Eddy: a subsurface anticyclone associated with the North Brazil Undercurrent at 4ºS." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/21/21135/tde-29042015-090550/.

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In this dissertation we describe a newly discovered subsurface frontal meander of the North Brazil Undercurrent (NBUC), centered at about 4ºS, 36.5ºW, hereafter Potiguar Eddy (PE). The Potiguar Eddy is an elliptically-shaped eddy, with major and minor axes of approximately 330 and 130 km, with a subsurface signature. It extends vertically from 100 m to 400 m, with maximum velocities of 0.6 m.s-1 and recirculates about 2 Sv of waters from the NBUC. Despite the presence of the PE in subtermocline waters, the surface flow is northwestward throughout the year. The analysis of variability of moorin

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13

Lumpkin, Rutledge P. "A numerical study of a mesoscale eddy interaction with an ocean front in the marginal ice zone." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/26114.

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Approved for public release; distribution is unlimited<br>The East Greenland Current and its associated Marginal Ice Zone is a region of intense dynamical activity. A two layer, primitive equation, numerical model is used to simulate an eddy-jet interaction in the East Greenland marginal ice zone region. The effects of wind direction, topography, and sense of eddy rotation on the eddy-jet interaction are examined to determine the seaward ice transport, icebanding, and dipole formation. It is determined that an anticyclone (15 cm/s) interacting with a jet (30 cm/s) will develop a dipol

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14

Newton, Tainá Santos. "Estudo da ocorrência do Vórtices de Cabo Frio e de Cabo de São Tomé." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/21/21135/tde-06022015-103910/.

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A Corrente do Brasil (CB) é a Corrente de Contorno Oeste (CCO) que ocupa a parte mais externa da plataforma continental sudeste brasileira e o talude continental e está centrada entre as isóbatas de 200 e 1000 m (Stramma & England, 1999). A CB flui ao largo do sudeste brasileiro sustentando a característica das CCO\'s, que é apresentar intensa atividade de mesoescala (Campos, 1995). Dentre as feições formadas estão os Vórtices de Cabo de São Tomé (VCST) e Cabo Frio (VCF). As causas da grande atividade vortical da CB e processos envolvendo o crescimento dos meandros foram extensivamente estudad

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15

Escudier, Romain. "Mesoscale eddies in the western mediterranean sea: characterization and understanding from satellite observations and model simulations." Doctoral thesis, Universitat de les Illes Balears, 2015. http://hdl.handle.net/10803/310417.

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Mesoscale eddies are relatively small structures that dominate the ocean variability and have large impact on large scale circulation, heat fluxes and biological processes.In the western Mediterranean Sea, a high number of eddies has been observed and studied in the past with in-situ observations. Yet, a systematic characterization of these eddies is still lacking due to the small scales involved in these processes in this region where the Rossby deformation radius that characterizes the horizontal scales of the eddies is small (10-15 km). The objective of this thesis is to perform a charact

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16

Ioannou, Artemis. "Dynamical evolution of intense mesoscale Ierapetra eddies in connection with orographic wind forcing." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS145.

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Le tourbillon Ierapetra (IE) est l’un des plus grands et des plus longs tourbillons de mésoéchelle de la Méditerranée orientale (MED). Situé au sud-est de la Crète, la formation récurrente de IE a été attribuée au forçage éolien régional. Pourtant, il n’y a pas que très peu d’informations sur les caractéristiques de leur dynamique, ni aucune preuve que l’IE soit forcé par le vent. Dans cette étude, une caractérisation complète de la dynamique des tourbillons Ierapetra est réalisée. Premièrement, en utilisant des observations satellites de la hauteur de surface de la mer ainsi que l'algorithme

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17

Johnson, John Edward. "An assessment of data requirements for quasigeostrophic nowcasts and hindcasts of a mesoscale eddy field in the California Current System with application to fall transition." Diss., Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA231394.

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Dissertation (Doctor of Philosophy)--Naval Postgraduate School, March 1990.<br>Dissertation Supervisor(s): Mooers, Christopher N.K. Description based on signature page August 25, 2009. DTIC Descriptor(s): Accuracy, California, Cyclones, Data Storage Systems, Density, Digital Simulation, Dynamics, Environments, Functions (Mathematics), Height, Images, Mathematical Models, Mean, North (Direction), Ocean Currents, Ocean Surface, Oceans, Predictions, Pressure Gradients, Requirements, Satellite Photography, Sea Water, Sensitivity, Surface Temperature, Surfaces, Topography, Transitions, Upwelling,

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18

Asdar, Sarah. "Climate change impact on ecosystems of Prince Edward Islands : role of oceanic mesoscale processes." Thesis, Brest, 2018. http://www.theses.fr/2018BRES0037/document.

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L’archipel du Prince Édouard est situé dans le Courant Circumpolaire Antarctique, entre le Front Subantarctique (SAF) et le front polaire (PF). Les positions de ces fronts se sont révélées très variables aux échelles interannuelles et mensuelles et ont montré une tendance à long terme à migrer vers le sud dans la région. L'activité tourbillonnaire, observée à la dorsale sud-ouest indienne, en amont de l’archipel, a également affiché une variabilité interannuelle et intra-annuelle ainsi qu’une tendance à la baisse sur ces 24 dernières années. A une échelle plus locale, nous avons souligné que l

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19

Hoffmann, Alex. "Simulating organization of convective cloud fields and interactions with the surface." Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/245211.

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The mesoscale organization and structure of convective clouds is thought to be rooted in the thermodynamic properties of the atmosphere and in the turbulent to mesoscale dynamics of the flow. Such structure may contribute to the transition between shallow and deep convection. The thermodynamic state of the boundary layer is forced by the amount of surface fluxes from below. Conversely, landscape patterns and land-cover heterogeneity may equally give rise to focused regions for deep convection triggering, in particular when patch sizes exceed 10 km. Since the convective boundary layer has a med

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20

Laxenaire, Rémi. "Étude du devenir des tourbillons des Aiguilles et de leur transport dans l’océan Atlantique Sud à partir d’observations satellitaires et in situ." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLX005/document.

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Les échanges de chaleur entre les océans Indiens et Atlantiques sont étroitement liés à la circulation globale et au climat. Ceux-ci sont principalement réalisés par les Anneaux des Aiguilles (AR pour "Agulhas Rings'') qui sont étudiés dans cette thèse à l'aide de cartes quotidiennes d'altimétrie satellitaire et de profils hydrologiques de flotteurs Argo.En développant et appliquant l'algorithme d'identification et de suivi des tourbillons TOEddies à 24 années de cartes de la topographie dynamique absolue, nous estimons les origines, les trajectoires et la durée de vie des AR. La principale no

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21

Combes, Vincent. "Upwelling and cross-shelf transport dynamics along the Pacific Eastern Boundary." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34814.

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The upwelling and cross-shelf transport dynamics along the Pacific Eastern Boundary is explored using a high resolution ocean model for the last 60 years. Three ocean circulations have been modeled. From North to South, we investigate the dynamics of the Gulf of Alaska (GOA), the California Current System (CCS) and the Humboldt Current System (HCS, also known as the Peru-Chile Current System). The statistics of coastal waters transport are computed using a model passive tracer, which is continuously released at the coast. By looking at the passive tracer concentration distribution, we find tha

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22

Munoz, Esparza Domingo. "Multiscale modelling of atmospheric flows: towards improving the representation of boundary layer physics." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209363.

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Atmospheric boundary layer flows are characterized by the coexistence of a broad range of scales. These scales cover from synoptic- (100-5000 km) and meso-scales (1-100 km) up to three-dimensional micro-scale turbulence (less than a few kilometers). This multiscale nature inherent to atmospheric flows clearly determines the behaviour of the atmospheric boundary layer, whose structure and evolution are of major importance for the wind energy community. This PhD thesis is focused on the development of a numerical methodology that allows to include contribution from all the above mentioned scales

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23

Vic, Clément. "Western Boundary Dynamics in the Arabian Sea." Thesis, Brest, 2015. http://www.theses.fr/2015BRES0060/document.

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Le but de cette thèse est d'analyser plusieurs phénomènes de bord ouest de la Mer d'Arabie : (i) le cycle de vie d'un tourbillon de mésoéchelle persistant, le Great Whirl; (ii) la dynamique d'un écoulement d'eau dense (outflow) formée dans une mer adjacente, l'outflow du Golfe Persique; et (iii) une remontée d'eau profonde (upwelling) saisonnière dans la zone côtière d'Oman. Le point commun entre ces phénomènes est leur localisation sur un bord ouest océanique. Ils sont donc influencés par des forçages locaux (notamment les vents de mousson) et les forçages à distance (ondes de Rossby et tourb

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24

Jheng, You-Teng, and 鄭宥騰. "Numerical Model Study of the Mesoscale Dipolar Eddy." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/23321901542084578086.

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碩士<br>國立臺灣大學<br>海洋研究所<br>103<br>Mesoscale eddies are common features of the open ocean and they can provide an efficient mechanism for the water masses and transport of energy. Recent studies found mesoscale dipolar eddy that consists of two counter-rotating eddies in the ocean. This study aims to investigate characteristics and dynamics of mesoscale dipolar eddy in f-plane. A reduced-gravity primitive equation eddy-resolving model was used to study them. Five sets of experiments (A-F) are simulated. The results are described as follow. We add a pair of anticyclonic eddy and cyclonic eddies wi

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25

Campbell, Michael F. "Mesoscale Eddy Dynamics and Scale in the Red Sea." Diss., 2020. http://hdl.handle.net/10754/666184.

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Recent efforts in understanding the variability inherent in coastal and offshore waters have highlighted the need for higher resolution sampling at finer spatial and temporal resolutions. Gliders are increasingly used in these transitional waters due to their ability to provide these finer resolution data sets in areas where satellite coverage may be poor, ship-based surveys may be impractical, and important processes may occur below the surface. Since no single instrument platform provides coverage across all needed spatial and temporal scales, Ocean Observation systems are using multiple t

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26

Chow, Chun Hoe, and 曹俊和. "Mesoscale Cyclonic Eddies Associated with the South China Sea Circulation–Case Study : Dongsha Cyclonic Eddy and Vietnam Cyclonic Eddy." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/46748248117254794754.

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博士<br>國立臺灣海洋大學<br>海洋環境資訊學系<br>97<br>The repeated movements of two mesoscale cyclonic eddies in the South China Sea (SCS) were observed annually from the sea level anomaly (SLA) contour maps during 1993–2006. One is the Dongsha Cyclonic Eddy (DCE) in the northern SCS (NSCS), and the other is the Vietnam Cyclonic Eddy (VCE) in the southern SCS (SSCS). By defining some criteria, these eddies were identified and tracked from the SLA maps for their life histories. The time series of eddy size, propagation speeds, sea level height difference (DIF) from eddy margin to eddy center, angular velocities

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27

Chiang, Tzu-Ling, and 江紫綾. "Simulations and interpretations on mesoscale eddy, Warm Current, and typhoon-induced temperature drop in the South China Sea." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/01059425289141611853.

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博士<br>國立臺灣師範大學<br>地球科學系<br>98<br>Based on a well-validated South China Sea (SCS) model, the characteristics of the westward-propagating mesoscale eddies, the formation mechanism of the South China Sea Warm Current (SCSWC), and the interplay between the upper ocean and typhoon Kai-Tak (2000) are studied. By virtue of a sequence of numerical experiments, the physical processes of those phenomena are further interpreted. On the basis of the model simulation, the sea surface height anomaly demonstrates that westward-propagating eddies originating in the vicinity of the Luzon Strait can modulate t

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28

Lin, Yu-Chun, and 林幼淳. "Analyses and modeling of ocean currents and waves: connection with mesoscale eddy, tropical cyclone, phytoplankton and climate variability." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/hg55y2.

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博士<br>國立中央大學<br>水文與海洋科學研究所<br>107<br>There are multiple air-sea interactions near the ocean surface that covers from regional to basin scale and from short-term to climate variations, especially over the western North Pacific. The thesis consists of 3 parts: (i) to detect and understand annual Rossby waves and mesoscale eddies in South China Sea; (ii) to analyze and model phytoplankton blooming in tropical cyclone wakes, and (iii) to analyze and model surface waves and their connection with atmospheric and climate dynamics. The first part presents an ingenious analysis of detecting Rossby wave

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