Rozprawy doktorskie na temat „Oceanography”
Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych
Sprawdź 50 najlepszych rozpraw doktorskich naukowych na temat „Oceanography”.
Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.
Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.
Przeglądaj rozprawy doktorskie z różnych dziedzin i twórz odpowiednie bibliografie.
Buffett, Grant George. "Seismic Oceanography: A New Tool to Characterize Physical Oceanographic Structures and Processes". Doctoral thesis, Universitat de Barcelona, 2011. http://hdl.handle.net/10803/1939.
Pełny tekst źródłaThe motivation behind this research is two-tier: 1) broadly, and academically, it is the scientific curiosity of understanding the ocean in order to better comprehend its role in the context of Earth systems; 2) expressly, the motivation is to develop the methodological toolset necessary to observe the ocean on a spatial and temporal scale not possible with traditional oceanographic techniques, thus allowing the foundation of more accurate models of ocean circulation and thereby, ocean-climate interactions.
The toolset is emerging as a robust technique of physical oceanography known as 'seismic oceanography'. By definition, seismic oceanography is the application of multichannel seismic (MCS) reflection profiling to physical oceanography. This definition, however, could be subject to future revision and refinement because the development of seismic oceanography observational tools will inevitably lead to newer perspectives.
The Mediterranean Outflow Water (henceforth, MOW) is a natural laboratory for seismic oceanography. The MOW was chosen to test seismic reflection in oceanography for three main reasons: 1) The strong oceanographic signature of the MOW. Due to the penetration of the MOW into the North Atlantic through the Strait of Gibraltar, strong characteristic contrasts in temperature (1.5 °C) and salinity (0.3 psu) and thus, density (0.4 kg/m3) are observed between the MOW and the surrounding Atlantic waters [Baringer and Price, 1997]. These contrasts in density (along with sound speed) are the contributing factors to reflection coefficient, making the identification of structures and processes possible. 2) The large variety of oceanographic and topographic features, such as a continental slope, undulating seafloor (including seamounts and basins) and mesoscale Mediterranean salt lenses (meddies). These structures and processes are believed to play an important role in maintaining the temperature and salinity distribution in the north Atlantic [Bower et. al., 1997]. 3) Finally, extensive archived data sets of bothoceanographic and seismic data place interpretive constraints on the data collected.
Part I of this thesis consists of two peer-reviewed papers published by the author and coauthors (Chapters 1 and 2), one manuscript submitted for publication (Chapter 3) and two published peer-reviewed research letters that the author played a lesser role developing (Chapter 4). Part II of the thesis addresses the seismological (Chapter 5) and oceanographic backgrounds (Chapter 6) in the context of some of the structures and processes that are amenable to seismic ensonification. Part III consists of general discussions and conclusions (Chapter 7) and potential future research and development (Chapter 8).
La motivació que hi ha al darrera d'aquest treball es pot separar en dos nivells: 1) En termes generals, i acadèmicament, és la curiositat purament científica d'estudiar l'oceà per tal de comprendre millor el seu paper en el context de les Ciències de la Terra; 2) Concretament, la motivació és desenvolupar les eines necessàries per a observar l'oceà a una escala espaial i temporal que no és possible amb les tècniques tradicionals oceanogràfiques, permetent així generar models més precisos de circulació oceànica i, per tant, de les interaccions oceà-clima.
L'objectiu a curt i mitjà termini d'aquesta tesi és el desenvolupament de noves eines d'oceanografia física que proporcionin noves perspectives sobre la dinàmica oceànica. Aquest conjunt d'eines està emergint com una metodologia sòlida dins de l'oceanografia física coneguda com 'oceanografia sísmica'. Per definició, l'oceanografia sísmica és l'aplicació de la sísmica de reflexió multicanal (MCS) a l'oceanografia física. Aquesta definició, però, podria estar subjecte a una futura revisió i perfeccionament, ja que el desenvolupament d'eines d'oceanografia sísmica inevitablement donarà lloc a noves perspectives.
La part principal d'aquesta tesi la constitueixen quatre articles, publicats per l'autor i co-autors al llarg del seu període d'investigació (capítols 1, 2 i 4); així com un article sotmès (Capítol 3). En la segona part, com a suport per als lectors no familiaritzats, s'aborden els antecedents sismològics (Capítol 5) i oceanogràfics (Capítol 6) en el context d'algunes de les estructures i processos que són susceptibles de ser identificats mitjançant la sísmica. Les conclusions generals es presenten en el Capítol 7 i en el Capítol 8 es donen algunes recomanacions per a futures investigacions i desenvolupaments (Part III). La tesi es complementa amb quatre apèndixs, on a banda d'un ampli resum en català (Apèndix I), hi ha els diagrames de flux utilitzats per l'autor en el processament de les dades sísmiques (Apèndix II), un conjunt de set desplegables de les seccions sísmiques en gran format (Apèndix III) i finalment un glossari de termes útils per ajudar als lectors no iniciats en qualsevol de les branques de la sismologia o l'oceanografia (Apèndix IV).
McGregor, J. A. "HF radar oceanography". Thesis, University of Canterbury. Physics, 1985. http://hdl.handle.net/10092/7578.
Pełny tekst źródłaVeilleux, Lorraine. "Physical oceanography of northern estuaries". Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59830.
Pełny tekst źródłaThe first one, in Rupert Bay (south-eastern corner of James Bay), describes tidal and local wind effects on circulation and mixing patterns for summer conditions. An estimate of terms in the lateral momentum equation shows that the centrifugal acceleration, the Coriolis force and the baroclinic pressure gradient are the most important forces at a mid-bay cross section transect.
The second study is concerned with the freshwater plume of Great Whale River (south-eastern Hudson Bay). CTD measurements were used to examine the lift-off point of the plume for under-ice and increasing discharge conditions. Comparison with existing models shows them to be inappropriate for under-ice conditions. Finally, the presence of supercooled water masses in the region of the study is reported.
Leathers, Robert A. "Inverse solution methods for optical oceanography /". Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/7066.
Pełny tekst źródłaMiddleditch, Andrew. "Spectral analysis in high frequency radar oceanography". Thesis, University of Sheffield, 2006. http://etheses.whiterose.ac.uk/3590/.
Pełny tekst źródłaBerry, P. J. "Applications of satellite altimetry to dynamical oceanography". Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/46961.
Pełny tekst źródłaSheen, Katy Louise. "Seismic oceanography : imaging the antarctic circumpolar current". Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609132.
Pełny tekst źródłaColeman, Dwight F. "Archaeological oceanography of inundated coastal prehistoric sites /". View online ; access limited to URI, 2003. http://0-wwwlib.umi.com.helin.uri.edu/dissertations/dlnow/3115624.
Pełny tekst źródłaZarroug, Moundheur. "Asymptotic methods applied to some oceanography-related problems". Doctoral thesis, Stockholm : Department of Meteorology, Stockholm University, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-37763.
Pełny tekst źródłaAt the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: Manuscript. Paper 4: Manuscript.
Nerger, Lars. "Parallel filter algorithms for data assimilation in oceanography". [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=975524844.
Pełny tekst źródłaKoonprasert, Sanoe. "The Sinc-Galerkin Method for Problems in Oceanography". Thesis, Montana State University, 2003. http://etd.lib.Montana.edu/etd/2003/koonprasert/KoonprasertS_03.pdf.
Pełny tekst źródłaHinsley, Westley Richard. "Planktonica : a system for doing biological oceanography by computer". Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.418316.
Pełny tekst źródłaFoster, Deborah Anne. "New applications of ²²â¶Ra to oceanography". Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409791.
Pełny tekst źródłaDomingues, Carla Sofia Portela. "Population genetics of C. Maenas : oceanography and larval dispersal". Doctoral thesis, Universidade de Aveiro, 2010. http://hdl.handle.net/10773/973.
Pełny tekst źródłaDecifrar a complexa interacção entre os ciclos de vida de espécies marinhas e a oceanografia revela-se fundamental para a compreensão do fluxo genético e da conectividade no meio marinho. Nas espécies marinhas com desenvolvimento indirecto o fluxo de genes entre populações depende da distância que separa as populações, bem como da interacção entre a duração do desenvolvimento larvar, do comportamento das larvas e dos padrões de circulação oceânica. A conectividade larvar influencia uma variedade de processos como a dinâmica de stocks e de populações, a distribuição e limites geográficos das espécies, a estrutura genética das populações e a dispersão de espécies invasivas e reveste-se consequentemente de uma importância fundamental na identificação das unidades populacionais evolucionariamente relevantes e para a gestão e conservação marinhas. Os marcadores genéticos e os Modelos Individuais Acoplados a Modelos Físico-Biológicos (“ICPBMs”) são actualmente ferramentas fundamentais para o estudo dos padrões de dispersão larvar e para avaliar o nível de conectividade populacional. A presente tese respeita à avaliação das escalas espaciais de conectividade de populações de uma espécie costeira, o caranguejo Carcinus maenas, e utiliza conjuntamente informação de marcadores genéticos, análise de séries temporais de fornecimento de larvas e um modelo numérico de circulação oceânica. O primeiro capítulo introduz a temática da conectividade em espécies marinhas e inclui algumas referências aos métodos moleculares, analíticos e de modelação seguidos ao longo da tese. Através da utilização de múltiplas ferramentas – avaliação da estrutura genética geográfica de C. maenas na sua distribuição nativa com recurso a marcadores de DNA (microssatélites) (Capítulo 2), avaliação da estrutura genética temporal das larvas que formam os eventos de fornecimento larvar à Ria de Aveiro, NW Portugal (Capítulo 3), descrição da variabilidade inter-anual do fornecimento larvar à Ria de Aveiro, NW Portugal (Capítulo 4) e validação de um modelo ICPBM que descreve os padrões observados de fornecimento (Capítulo 5) – esta tese espera poder contribuir para uma melhor compreensão dos mecanismos que regulam o fluxo de genes e a conectividade entre populações de organismos marinhos. No Capítulo 6 são apresentadas as principais conclusões da investigação. A análise genética com recurso a microssatélites indicou que as populações de C. maenas são geneticamente homogéneas ao longo de várias centenas de km, dentro da distribuição nativa da espécie. Paralelamente, não foram encontrados indícios da existência de reprodução por “sweepstakes” em C. maenas de populações da costa oeste da Península Ibérica, visto que não se obtiveram diferenças genéticas significativas entre os eventos larvares. Também não se encontrou qualquer estrutura familiar entre as larvas que formam cada episódio de fornecimento, e não houve nenhuma redução significativa da variabilidade genética das larvas quando comparada com a de caranguejos adultos. A análise de séries temporais de suprimento de larvas na Ria de Aveiro em cinco anos estudados indica que este é um fenómeno episódico e variável, sendo os maiores episódios de fornecimento coincidentes com as marés vivas e acentuados por fortes ventos de sul. O modelo ICPBM foi validado com sucesso e parece fornecer uma estimativa realística das escalas espaciais e temporais de dispersão larvar, de acordo com as observações da estrutura genética e da ausência de reprodução por “sweepstake” em C. maenas da costa oeste da Península Ibérica
Unravelling the interactions between life-history strategies and oceanographic processes is central to the understanding of gene flow and connectivity in the marine environment. In particular, for marine species with indirect development gene flow between populations depends on the distance separating the populations and on the interaction between duration of the larval phase, larval behaviour and current patterns. Larval connectivity affects many processes, including stock and population dynamics, species ranges, population genetic structure, and the spread of invasive species and is therefore an important consideration to identify evolutionary relevant population unit and for marine management and conservation efforts. Genetic markers and Individual-based Coupled Physical-Biological Models (ICPBMs) are two of the tools currently available for tracking dispersal pathways of larvae and to assess the degree of population connectivity. The present thesis concerns the spatial and temporal scale assessment of population connectivity of a coastal marine species, the shore crab Carcinus maenas, making use of genetic markers, time series larval supply analysis and an oceanographic numerical model. Chapter 1 introduces the thematic of marine species connectivity, including a brief reference to the molecular, analytical and modelling methods followed during the study. Making use of an interdisciplinary approach – assessment of genetic geographical structure with microsatellite markers within C. maenas native range (Chapter 2), assessment of temporal genetic structure of larvae forming each supply event to the Ria de Aveiro, NW Portugal (Chapter 3), description of interannual variability of larval supply to the Ria de Aveiro, NW Portugal (Chapter 4) and validation of an ICPBM to describe the observed time series of supply (Chapter 5) – the aims of this thesis is to contribute to our understanding of the mechanisms regulating gene flow and connectivity among marine populations. Finally, in Chapter 6 the main results and conclusions achieved are presented. Microsatellites analysis indicated that C. maenas populations were genetically similar across hundreds of km, within the species native range. Additionally, there was no evidence of sweepstakes reproduction in C. maenas from western Iberian coast populations since there were no significant differences amongst larval events. Among larvae in each episode, no genetic relatedness was found, and larvae did not present reduced genetic variability when compared to adult crabs. On a long time scale, larval supply to the Ria de Aveiro was episodic and variable throughout five different studied years, with highest supply numbers generally occurring around spring tides and enhanced by strong southerly winds. The ICPBM was successfully validated and appears to provide a realistic estimate of the observed spatial and temporal scales of the larval dispersal, consistent with the observations on genetic structure and lack of sweepstake reproduction in C. maenas from western Iberian coast.
Mondello, Nicholas. "Physical oceanography off the South Coast of Western Australia". Thesis, Mondello, Nicholas (2017) Physical oceanography off the South Coast of Western Australia. Honours thesis, Murdoch University, 2017. https://researchrepository.murdoch.edu.au/id/eprint/40163/.
Pełny tekst źródłaDjurhuus, Anni. "Microbial oceanography of southern hemisphere seamounts and hydrothermal vents". Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:727fb8de-a392-4030-bc86-6390143111fd.
Pełny tekst źródłaJarvis, Marley. "Physical Oceanography, Larval Dispersal, and Settlement Across Nearshore Fronts". Thesis, University of Oregon, 2015. http://hdl.handle.net/1794/18711.
Pełny tekst źródłaGoodlad, Stephen W., i Stephen W. Goodlad. "Tectonic and sedimentary history of the Mid-Natal Valley (S.W. Indian Ocean)". Doctoral thesis, University of Cape Town, 1986. http://hdl.handle.net/11427/23640.
Pełny tekst źródłaThe Natal Valley is a sediment-filled marine basin situated between the east coast of southern Africa (Natal) and the Mozambique Ridge. Geophysical and sedimentological techniques are used in a broad geological study of the mid Natal Valley. Major emphasis is directed to: (a) basin history and tectonic evolution; (b) seismic stratigraphy of the basin fill; (c) recent sedimentary processes and responses. General basin morphology is defined by five major physiographic provinces: continental shelf and slope, Tugela Cone, Central Terrace, Mozambique Ridge and deep basin plain. Thinned (20-25 km) continental crust, attenuated and subsided in response to Gondwana rifting and drifting, underlies the Central Terrace, Tugela Cone and Mozambique Ridge. Southern margins of the Central Terrace and Tugela Cone are cored by a series of subsea floor ridge and pinnacle complexes (Naude, East Tugela and South Tugela Ridges). Geochemical analyses of East Tugela Ridge basalts suggest a transitional origin but with continental affinities. These volcanic marginal ridges may approximately delineate the continental-oceanic crust boundary (COB) in the Natal Valley. To the south, the deep basin plain is underlain by oceanic crust.
Bâcle, Julie. "The physical oceanography of waters under the North Water Polynya /". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ64314.pdf.
Pełny tekst źródłaPruis, Matthew J. "Energy and volume flux into the deep ocean : examining diffuse hydrothermal systems /". Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/10990.
Pełny tekst źródłaBain, Cairns Alexander Robertson. "Empirical dynamics of a small scale coastal upwelling region". Doctoral thesis, University of Cape Town, 1991. http://hdl.handle.net/11427/21855.
Pełny tekst źródłaSteffen, Elizabeth Laird. "Observations of vertical and horizontal aspects of deep convection in the Labrador Sea by fully Lagrangian floats /". Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/11028.
Pełny tekst źródłaDale, Andrew W. "The oceanography and modelling of the Pontevedra Ria (NW Spain)". Thesis, University of Plymouth, 2003. http://hdl.handle.net/10026.1/1966.
Pełny tekst źródłaAravamudhan, Shyam. "Development of micro/nanosensor elements and packaging techniques for oceanography". [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002219.
Pełny tekst źródłaLe, Quéré Corinne. "Physical oceanography of the Baie des Chaleurs, Gulf of St. Lawrence". Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=56761.
Pełny tekst źródłaThree water masses, one between the surface and the thermocline, one straddling the thermocline, and one at the bottom, were found to describe nicely the TS properties of the water column, as observed from the 1991 CTD data.
The observed circulation, from August to October 1990, was cyclonic, with baroclinicity observed in the bottom two layers, and at two stations in the top layers.
Pierce, David W. "Rotating convection and the oceanic general circulation /". Thesis, Connect to this title online; UW restricted, 1993. http://hdl.handle.net/1773/10993.
Pełny tekst źródłaLaudier, Natalie A. "Wave overtopping of a barrier beach". Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Sep/09Sep%5FLaudier.pdf.
Pełny tekst źródłaThesis Advisor(s): MacMahan, Jamie. "September 2009." Description based on title screen as viewed on 5 November 2009. Author(s) subject terms: Overtopping, run-up, barrier, natural beach, Carmel River Beach Includes bibliographical references (p. 41-44). Also available in print.
Horn, Isaac Abraham. "Remote Sensing and Data Collection in a Marine Science Application". Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/HornIA2006.pdf.
Pełny tekst źródłaBarnes, Brian Burnel. "The Combined Effects of Light and Temperature on Coral Bleaching| A Case Study of the Florida Reef Tract Using Satellite Data". Thesis, University of South Florida, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3604824.
Pełny tekst źródłaCoral reefs are greatly impacted by the physical characteristics of the water surrounding them. Incidence and severity of mass coral bleaching and mortality events are increasing worldwide due primarily to increased water temperature, but also in response to other stressors. This decline in reef health demands clearer understanding of the compounding effects of multiple stressors, as well as widespread assessment of coral reef health in near-real time.
Satellites offer a means by which some of the physical stressors on coral reefs can be measured. The synoptic spatial coverage and high repeat sampling frequency of such instruments allow for a quantity of data unattainable by in situ measurements. Unfortunately, errors in cloudmasking algorithms contaminate satellite derived sea surface temperature (SST) measurements, especially during anomalously cold events. Similarly, benthic interference of satellite-derived reflectance signals has resulted in large errors in derivations of water quality or clarity in coral reef environments.
This work provides solutions to these issues for the coral reef environments of the Florida Keys. Specifically, improved SST cloudmasking algorithms were developed for both Advanced Very High Resolution Radiometer (AVHRR; Appendix A) and Moderate Resolution Imaging Spectroradiometer (MODIS) data (Appendix B). Both of these improved algorithms were used to reveal the extent and severity of a January 2010 cold event that resulted in widespread mortality of Florida Keys corals. Applied to SST data from 2010, the improved MODIS cloudmasking algorithm also showed improved quantity of SST retrievals with minimal sacrifice in data quality.
Two separate algorithms to derive water clarity from MODIS measurements of optically shallow waters were developed and validated, one focusing on the diffuse downwelling attenuation coefficient (Kd, m-1 ) in visible bands (Appendix C), the other on Kd in the ultraviolet (Appendix D). The former utilized a semi-analytical approach to remove bottom influence, modified from an existing algorithm. The latter relied on empirical relationships between an extensive in situ training dataset and variations in MODIS-derived spectral shape, determined using a stepwise principal components regression. Both of these algorithms showed satisfactory validation statistics, and were used to elucidate spatiotemporal patterns of water clarity in the Florida Keys. Finally, an approach was developed to use Landsat data to detect concurrent MODIS-derived reflectance anomalies with over 90% accuracy (Appendix E). Application of this approach to historical Landsat data allowed for long-term, synoptic assessment of the water environment of the Florida Keys ecosystem. Using this approach, shifts in seagrass density, turbidity increases, black water events, and phytoplankton blooms were detected using Landsat data and corroborated with known environmental events.
Many of these satellite data products were combined with in situ reports of coral bleaching to determine the specific environmental parameters individually and synergistically contributing to coral bleaching. As such, SST and visible light penetration were found to be parsimoniously explaining variance in bleaching intensity, as were the interactions between SST, wind and UV penetration. These relationships were subsequently used to create a predictive model for coral bleaching via canonical analysis of principal coordinates. Leave-one-out-cross-validation indicated that this model predicted `severe bleaching' and `no bleaching' conditions with 64% and 60% classification success, respectively, nearly 3 times greater than that predicted by chance. This model also showed improvement over similar models created using only temperature data, further indicating that satellite assessment of coral bleaching based only on SST data can be improved with other environmental data. Future work should further supplement the environmental parameters considered in this research with databases of other coral stressors, as well as improved quantification of the temperature at the depth of corals, in order to gain a more complete understanding of coral bleaching in response to environmental stress.
Overall, this dissertation presents five new algorithms to the field of satellite oceanography research. Although validated primarily in the Florida Keys region, most of these algorithms should be directly applicable for use in other coastal environments. Identification of the specific environmental factors contributing to coral bleaching enhances understanding of the interplay between multiple causes of reef decline, while the predictive model for coral bleaching may provide researchers and managers with widespread, near real-time assessments of coral reef health.
Bardin, Ann Marie. "Novel Analysis Tools for Ocean Biogeochemical Models". Thesis, University of California, Irvine, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3646712.
Pełny tekst źródłaOcean general circulation models of the IPCC class have biases even when simulating present-day conditions, which may bring into question their predictions of future conditions. This dissertation is about tools for, and results from assessing biases in the Community Earth System Model (CESM) ocean component, by itself and when combined with the Biological Ecosystem Cycling (BEC) model. Newly developed tools and their applications are listed. 1. An offline matrix tracer transport model for the ocean component of CESM. 2. A fast Newton-Krylov implicit tracer equilibrium solver for both the annually-averaged and the seasonally-varying circulation. 3. An effective preconditioner for the solver simulating radiocarbon. Application results: For a natural radiocarbon simulation, an equilibrium solution was obtained in 23 model-years, a dramatic decrease from the 4000 model-years reported for time-stepping. The modeled circulation in the deep Pacific Ocean produced radiocarbon ages twice those of observations. 4. A capability for computing the surface origin of water mass fractions as well as the age of the various water masses.
Application results: The North Atlantic was the major supplier of ventilated water to not only the Atlantic, but also the Pacific and Indian Oceans. A lack of formation of bottom water in the Southern Ocean was discovered. 5. A capability for restricting the tracer simulation domain to a limited region of the ocean while retaining the effectiveness of advection and diffusion fields on the boundary. This reduces computational costs and allows separating local versus remote impacts of tracer sources on the biogeochemical tracer concentrations. This capability has the potential to provide a platform for further biogeochemical studies.
Application results: The Indian Ocean region was isolated. Global versus regional circulation effects were determined using radiocarbon. Most of the bias within the region was eliminated by using observational, rather than globally calculated values, on the boundaries. Oxygen production and consumption from a CMIP5 BEC simulation were used to drive a regional oxygen model. Boundary values of oxygen from the CMIP5 BEC simulation were replaced with observations, resulting in less bias within the region. However, significant bias in the location of the Arabian Sea oxygen minimum zone remained.
Pickett, Mark H. "Improving wind-based upwelling estimates off the west coasts of North and South America". Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FPickett.%5FPhD.pdf.
Pełny tekst źródłaKumar, Vijay. "Modelling the physico-biological processes of eastern Arabian sea". Thesis, IIT Delhi, 2016. http://localhost:8080/xmlui/handle/12345678/7093.
Pełny tekst źródłaBooth, Charles W. Gutsch Barbara J. "Military applications of intranet technology : Fleet Numerical Meteorology and Oceanography Center /". Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA337406.
Pełny tekst źródłaThesis advisors, James C. Emery, Frank L. Barrett. Includes bibliographical references (p. 145-146). Also available online.
Nieves, Calatrava Verónica U. "Multiscale techniques in turbulence: application to geophysical fluids and operational oceanography". Doctoral thesis, Universitat Politècnica de Catalunya, 2008. http://hdl.handle.net/10803/21617.
Pełny tekst źródłaSyahailatua, Augy BEES UNSW. "Biological oceanography of larval fish diversity and growth off eastern Australia". Awarded by:University of New South Wales. BEES, 2005. http://handle.unsw.edu.au/1959.4/22791.
Pełny tekst źródłaNieves, Calatrava Veronica Ursula. "Multiscale techniques in turbulence: application to geophysical fluids and operational oceanography". Doctoral thesis, Universitat Politècnica de Catalunya, 2008. http://hdl.handle.net/10803/21617.
Pełny tekst źródłaBooth, Charles W., i Barbara J. Gutsch. "Military applications of intranet technology: Fleet Numerical Meteorology and Oceanography Center". Thesis, Monterey, California. Naval Postgraduate School, 1997. http://hdl.handle.net/10945/8677.
Pełny tekst źródłaIntranets are rapidly becoming a corporate internal information- sharing medium. Intranet technology is the same robust, proven, industry standard technology that is used on the Internet. The technical aspects of implementing the technology are simple. The organization and management aspects are significant and are key to its successful implementation. This internal use of Internet technology is easy, inexpensive, and has produced savings and benefits for corporate organizations. This thesis reviews corporate and government intranets and examines the feasibility of implementing this technology and benefiting from it, in a military organization. Specific applicability of Intranet technology was examined at Fleet Numerical Oceanographic and Meteorology Center, while maintaining the vision of its applicability to other military organizations. Fleet Numerical Oceanographic and Meteorology Center has the requisite technical and organizational infrastructure necessary to successfully implement Intranet technology. The management and technical skill sets necessary to successfully implement this technology at any military command operating a computer network should be available, or easily trained. Fleet Numerical Oceanographic and Meteorology Center and the U.S. Military should establish the organizational plans and infrastructure to implement and exploit this empowering information sharing medium.
Addison, Victor G. "The physical oceanography of the northern Baffin Bay-Nares Strait region". Thesis, Monterey, California. Naval Postgraduate School, 1987. http://hdl.handle.net/10945/22417.
Pełny tekst źródłaA dense network of conductivity-temperature-depth measurements was conducted from Baffin Bay northward to 82 deg 09 min N at the entrance to the Lincoln Sea, in the most comprehensive physical oceanographic survey ever performed in the northern Baffin Bay-Nares Strait region. These data indicate Nares Strait Atlantic Intermediate Water and Arctic Basin Polar Water to be derived from Arctic Basin waters via the Canadian Archipelago, whereas the West Greenland Current (WGC) is the source of the comparatively dilute West Greenland Current Atlantic Intermediate Water and West Greenland Current Polar Water fractions. Baffin Bay Surface Water is found seasonally throughout northern Baffin Bay. Recurvature of component branches of the WGC, which attains a maximum baroclinic transport of 0.7 Sv, occurs primarily in Melville Bay (0.2 Sv), south of the Carey Islands (0.1 Sv) and ultimately in Smith Sound (0.2 Sv). The Baffin Current originates as an ice-edge jet in Smith Sound and is augmented by net outflow from Smith, Jones and Lancaster Sounds at rates of 0.3 Sv, 0.3 Sv and 1.1 Sv, respectively. Circulation in Smith, Jones and Lancaster Sounds can be described in terms of the Geostrophic Estuarine Circulation Model. The North Water is caused by the combined influences of near-surface layer enthalpy and mechanical ice removal. KeywordsL Sea water temperature; Oceanographic data; Straits; Sounds(Waterways); Ocean currents
MacTavish, Flora Pamela. "The application of adaptive mesh techniques to convective processes in oceanography". Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/11616.
Pełny tekst źródłaReddy, Tasha Elise. "Oceanography of the Ross Sea : ocean circulation, sea ice, and phytoplankton /". May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
Pełny tekst źródłaCoppini, Giovanni <1974>. "Development of operational oceanography applications: environmental indicators and decision support systems". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2996/1/Coppini_Giovanni_tesi.pdf.
Pełny tekst źródłaCoppini, Giovanni <1974>. "Development of operational oceanography applications: environmental indicators and decision support systems". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2996/.
Pełny tekst źródłaAbrahamsen, Einar Povl. "Oceanographic conditions beneath Fimbul Ice Shelf, Antarctica". Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/338914/.
Pełny tekst źródłaPearson, Ann 1971. "Biogeochemical applications of compound-specific radiocarbon analysis". Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/44599.
Pełny tekst źródłaIncludes bibliographical references.
Compound-specific carbon isotopic (613C and A14C) data are reported for lipid biomarkers isolated from Santa Monica Basin (SMB) and Santa Barbara Basin (SBB) surface sediments. These organic compounds represent phytoplanktonic, zooplanktonic, bacterial, archaeal, terrestrial, and fossil carbon sources. The lipids include long-chain n-alkanes, fatty acids (as FAMEs), n-alcohols, C30 mid-chain ketols and diols, sterols, hopanols, and ether-linked C40-biphytanes of Archaea. The data show that the carbon source for most of the biomarkers is marine euphotic zone primary production or subsequent heterotrophic consumption of this biomass. Two lipid classes represent exceptions to this finding. A14C values for the n-alkanes are consistent with mixed fossil and contemporary terrestrial plant sources. The archaeal isoprenoid data reflect chemoautotrophic growth below the euphotic zone. The biomarker class most clearly representing marine phytoplanktonic production is the sterols. It is suggested, therefore, that the sterols could serve as paleoceanographic tracers for surface-water DIC. The isotopic data are used to construct two algebraic models. The first calculates the contributions of fossil and modern vascular plant carbon to SMB n-alkanes. This model indicates that the A14C of the modern component is +235%o (post-bomb) or 0%o (pre-bomb). The second model uses these values to determine the origin of sedimentary TOC. The results are comparable to estimates based on other approaches and suggest that -60% of SMB TOC is of marine origin, modern terrestrial and fossil sources contribute -10% each, and the remaining -20% is of unknown origin.
by Ann Pearson.
Ph.D.
Monteiro, Pedro Manuel Scheel. "The oceanography, the biogeochemistry and the fluxes of carbon dioxide in the Benguela Upwelling System". Doctoral thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/18950.
Pełny tekst źródłaBhushan, Vikas. "Modeling convection in the Greenland Sea". Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/58537.
Pełny tekst źródłaIncludes bibliographical references (leaves 155-161).
A detailed examination of the development of a deep convection event observed in the Greenland Sea in 1988-89 is carried out through a combination of modeling, scale estimates, and data analysis. We develop a prognostic one-dimensional mixed layer model which is coupled to a thermodynamic ice model. Our model contains a representation of the lowest order boundary layer dynamics and adjustable coupling strengths between the mixed layer, ice, and atmosphere. We find that the model evolution is not very sensitive to the strength of the coupling between the ice and the mixed layer sufficiently far away from the limits of zero and infinite coupling; we interpret this result in physical terms. Further, we derive an analytical expression which provides a scale estimate of the rate of salinification of the mixed layer during the ice-covered preconditioning period as a function of the rate of ice advection. We also derive an estimate for the rate of the mixed layer deepening which includes ice effects. Based on these scale estimates and model simulations, we confirm that brine rejection and advection of ice out of the convection area were essential ingredients during the preconditioning process. We also demonstrate that an observed rise in the air temperature starting in late December 1988 followed by a period of moderately cold ~ -10*C temperatures was key to the development of the observed convection event. Finally, we show that haline driven deep convection underneath an ice cover is possible, but unlikely to occur in the Greenland Sea. On the basis of these results, we develop a coherent picture of the evolution of the convection process which is more detailed than that presented in any previous work. We also comment on the likelihood that deep convection occurred in the Greenland Sea in the past two decades from an examination of historical data, and relate these findings to what is known about the inter-annual variability of convective activity in the Greenland Sea
by Vikas Bhushan.
S.M.
Cherian, Deepak Abraham. "When an eddy encounters shelf-slope topography". Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107086.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (pages 129-135).
Eddies in the ocean move westwards. Those shed by western boundary currents must then interact with continental shelf-slope topography at the western boundary. The presence of other eddies and mean flows complicates this simple picture, yet satellite images show that mesoscale eddies translating near the shelfbreak routinely affect the continental shelves of the Mid-Atlantic Bight, the Gulf of Mexico etc. The consequent cross-shelfbreak transports are currently of unknown importance to shelf budgets of heat, salt and volume. Thus motivated, this thesis uses idealized continuously stratified numerical experiments to explore eddy-slope interactions under four questions: 1. Can the continental slope prevent an eddy from reaching the shelfbreak? 2. What is the structure of the eddy-driven offshore flow? 3. How is the continental shelf affected by an eddy at the shelfbreak? 4. Given surface observations, can one estimate the volume of water transported across the shelfbreak? The experiments show that the efficiency of Rossby wave radiation from the eddy controls whether it can cross isobaths: by radiating energy the eddy becomes shallow enough to move into shallower water. For wide continental slopes, relative to an eddy diameter, a slope can prevent an anticyclone from reaching the shelfbreak by shutting down such radiation. For narrow continental slopes, the interaction repeatedly produces dipoles, whose cyclonic halves contain shelf-slope water stacked over eddy water. The formation of such cyclones is explained. Then, the structure of shelf flows forced by the eddy are studied: their vertical structures are rationalized and scalings derived for their cross-isobath scales; for example, the extent to which the eddy influences the shelf. A recipe for estimating cross-isobath transports based on eddy surface properties is put forward. Finally, the findings are tested against observations in the Middle Atlantic Bight off the northeastern United States.
by Deepak Abraham Cherian.
Ph. D.
Ong, Ahchuan. "Diagnostic initialization generated extremely strong thermohaline sources and sinks in the South China Sea". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FOng.pdf.
Pełny tekst źródłaMacKinnon, Douglas J. "A communication link software model for Fleet Numerical Meteorology and Oceanography Center". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA384723.
Pełny tekst źródłaThesis advisor(s): Osmundson, John S. "December 2000." Includes bibliographical references (p. 29). Also available in print.
Navarro-Perez, Eleuteria. "Physical oceanography of the Canary current : short term, seasonal and interannual variability". Thesis, Bangor University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318561.
Pełny tekst źródła