Dissertations / Theses: 'Antarctic plate'

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Henry, Chris. "Teleseismic studies of large submarine earthquakes." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249590.

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Brocklehurst, Anne M. "Kinematic modelling of ridge-trench interactions with application to the Antarctic Peninsula." Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366726.

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Johnson, Ashley Charles. "A geophysical investigation of crustal structure and segmentation of the central Antarctic Peninsula." Thesis, Open University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266417.

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Plate, Carolin [Verfasser], and Ralf [Akademischer Betreuer] Müller. "Fracture Mechanical Analysis of Failure Processes in Antarctic Ice Shelves / Carolin Plate. Betreuer: Ralf Müller." Kaiserslautern : Technische Universität Kaiserslautern, 2015. http://d-nb.info/1079524126/34.

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Hicks, Stephen Walter. "The Commonwealth Trans-Antarctic Expedition 1955-58 - How the crossing of Antarctica moved New Zealand to recognise its Antarctic heritage and take an equal place among Antarctic nations." Thesis, University of Canterbury. Gateway Antarctica, 2015. http://hdl.handle.net/10092/10485.

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The thesis analyses the expedition (TAE) led by Dr.Vivian Fuchs and Sir Edmund Hillary from three vantage points: 1)the years from 1948 to 1955 leading up to the expedition 2) the interaction between the IGY and the TAE projects and 3) the role of the US Navy as the expedition unfolded. The thesis also investigates key events including the purchase of the ship Endeavour from Britain, the competition for leadership of the UK and NZ parties, the 'dash to the Pole' by Hillary, and the search for base sites and routes to the Polar Plateau. The thesis contains an overview historical introduction, a comprehensive literature review as well as a broad-based set of conclusions.

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Herbert, Andrea. "Making place at the end of the world : an ethnography of tourism and urban development in Ushuaia, Argentina’s Antarctic Gateway City." Thesis, University of Canterbury. LSAPS, Anthropology, 2014. http://hdl.handle.net/10092/9421.

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This thesis is concerned with the lived experience of placemaking in Argentina’s Antarctic gateway port Ushuaia. Based on 12 months ethnographic fieldwork, it explores the relations between tourism, urban development, and socio-economic difference. As such, it investigates how agents from across the social spectrum conceive of, and construct their sense of place “at the end of the world”. As the world’s southernmost city, Ushuaia is attractive to tourists for its stunning landscapes, unique location, and strategic proximity to Antarctica. However, the image of a friendly tourist destination crucial to everyday life in this Patagonian city is contested by its stakeholders. This thesis looks beyond the image presented to tourists to explore frictions among residents, the city council, and touristic enterprises. Ushuaia is revealed as an urban location beset by growing unrest due to issues of population growth and social polarization. This is analyzed in relation to its geopolitical significance for the Argentine state, territorial struggles with Chile, and economic incentives for in-migration. Consequently, this thesis considers the dynamic and shifting character of the city’s population through an engagement with economic and lifestyle migrants, including those dwelling in non-legal settlements, and tourists who occupy Ushuaian space alongside more longstanding citizens. The thesis demonstrates how conflicting views collide regarding issues of urbanization, industrialization, tourism, and environmental conservation, analyzed in relation to the interests and concerns of different social constituencies. Through extensive interviewing with a diverse array of social actors, this thesis also explores the different levels of economic and socio-cultural attachment to Antarctica, suggesting a schism between Ushuaia’s touristic representation, Antarctic alignment, and the needs and interests of its inhabitants. This thesis, then, explains the diverging place-based ideas and aspirations of different social groups in relation to the governmental, socio-economic, and socio-cultural forces implicated in placemaking.

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Phillips, Glen. "The tectonic history of the Ruker Province, southern Prince Charles Mountains, East Antarctica : implications for Gondwana and Rodinia /." Connect to thesis, 2006. http://eprints.unimelb.edu.au/archive/00003263.

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McCarron, Joseph John. "Evolution and tectonic implications of late Cretaceous - early Tertiary fore-arc magmatism : Alexander Island, Antarctica." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389878.

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Nankivell, Adrian P. "Tectonic evolution of the Southern Ocean between Antarctica, South America and Africa over the past 84Ma." Thesis, University of Oxford, 1997. http://ora.ox.ac.uk/objects/uuid:c7a38be2-1973-47ff-9d4e-f4e76d227d46.

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An improved method has been developed for carrying out 2-plate reconstructions, in which fracture zone locations are fitted to synthetic flowlines and magnetic anomaly picks are rotated and fitted to great circles representing other, not necessarily conjugate, anomaly isochrons. This enables the determination of finite rotation poles for regions with sparse data coverage, or where much of one or both plates has been subducted. Misfits and partial derivatives are calculated for each type of data, and combined in a single iterative inversion, allowing the direct calculation of confidence intervals. This method is then extended to a 3-plate reconstruction, taking closure into consideration. The South American - African - Antarctic plate system is then studied. Fracture zone locations are identified from a gravity map constructed from GEOSAT altimeter data, and magnetic anomalies are identified from ship profiles. Two-plate reconstructions are carried out for each plate pair, giving good fits to the observed data, and then all three datasets are combined in a 3-plate reconstruction. Comparison of the results reveals a discontinuity in spreading in the Weddell Sea, believed to be related to pseudo-asymmetric spreading caused by ridge re-organisation in the Paleocene and early Eocene. A revised 3-plate inversion, taking this discontinuity into account, produces an internally consistent set of poles, indicating a closed 3-plate system since anomaly 34 (83Ma), with no evidence for a Malvinas Plate extending into the Weddell Sea in the Late Cretaceous. Disruption to the system from anomaly 32 (71Ma) until anomaly 24 (52Ma), appears to be related to the collision of Africa with Eurasia. A study of the past motion, configuration and stability of the Bouvet Triple junction suggests that for the majority of the past 50Ma it has been in a RFF configuration, in theory considerably less stable than RRR, the other possible configuration.

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Neufeld, Erin. "A Place on the Ice: the stories, images, and experiences that make New Zealand's Antarctica." Thesis, University of Canterbury. Gateway Antarctica, 2014. http://hdl.handle.net/10092/10062.

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The polar landscapes have, for a long time, held the imaginations of people around the world. These extreme and remote environments have shaped the hearts and minds not only of people who have lived there, but also those who have only heard stories and seen pictures of these far off lands of ice and sky and snow. This dissertation examines the sense of place developed by New Zealanders towards Antarctica, across a spectrum of experiences with the continent, from seasonal workers and scientists, to people who have only ever seen it in books or advertisements. Taking a mainly phenomenological approach, the main objective of the research is to generate a theoretical base on what sense of place is made with and how it is created in extreme and remote environments like Antarctica. After examining 30 questionnaires and 54 interviews, the data indicate that there is no one New Zealand sense of Antarctica; rather, they are as manifold and complex as the individuals consulted. Regardless of the many differences across the various groups, a common thread was found of Antarctica as a place of hope. A hope based on scientific discovery and collaboration, on resource potential and conserving wild spaces. Findings also helped to develop a theoretical model, which builds on the existing works of Tuan (1977), Sack (1997), and Gustafson (2001). Three important theoretical aspects were identified through the analysis, including the ideas of personal connection, narrative emplotement, and one’s sense of identity. The theory contributes to the ongoing discussion of how people encounter and make sense of extreme and remote environments. Both the findings themselves and the theory behind them suggest that policy makers, communicators, and tourism operators be aware of their target audience, their cultural values and changing symbolism, in order to better communicate their intended message.

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Dalke, Samuel S. "Colonialist ideals in an un-colonial place "Terra Australis Nondum Cognita" /." Diss., Connect to the thesis, 2007. http://hdl.handle.net/10066/992.

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Nielsen, Hanne Elliot Fønss. "The Wide White Stage: Representations of Antarctica in Theatrical Productions (1930-2011)." Thesis, University of Canterbury. Gateway Antarctica, 2013. http://hdl.handle.net/10092/8812.

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This project examines representations of Antarctica in the theatre and analyses these in terms of space and place in order to chart the development of awareness of the continent. As examples of cultural production, plays and their treatment of imagined Antarctic space can provide insights into how attitudes towards the continent have developed and been expressed by revealing the dominant narratives at various points in time. A close reading of nine plays from 1930 – 2011 focuses on the use of mimetic and diegetic space within the theatre, examining the language used, stories told and attitudes present. Such analysis reveals the factors determining the choice of an Antarctic setting, be they ecological, political or metaphorical, whilst shedding light on how attitudes towards place, space and representation have changed within the theatre context. These plays can be grouped under four thematic headings, namely “In Scott’s Footsteps,” “Retelling,” “Reimagining,” and “Returning.” While Antarctica remains a backdrop in earlier plays, where Heroic Era narratives are foregrounded, more recent productions have seen the continent come to the fore, where it is treated as part of a global web of connections. These plays illustrate a progression in how Antarctica has been represented upon the stage, a progression that parallels how we have thought about Antarctica in general.

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Lenton, Teresa Ellen. "The influence of representations on English students' perceptions of the place of Antarctica." Thesis, University of Cumbria, 2016. http://insight.cumbria.ac.uk/id/eprint/2443/.

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This thesis is a cross disciplinary consideration of the philosophical, psychological and pedagogical debates on the construction of place. This place discourse is interwoven with an investigation of the historical and current social, cultural and scientific representations of the unique and significant place of Antarctica and school research. Through the paradigm of critical educational research it relates this place discourse to the pedagogy of place. Classroom research, using an integrative mixed methods approach, was undertaken in an English, comprehensive, secondary school with mixed gender and ability 11-18 year old English students. This case study examines how representations influence English school students’ place perceptions of the Antarctic continent. Analysis of the classroom research with qualitative software identifies the key components and differences of the imaginations and the ‘realities’ of the students’ perceptions of Antarctica. The research establishes what and how varied representations influence the students’ place perceptions of this distant continent. It explores how digital representations across the continuum of the concept of place, a film place matrix and dialogical discussion could be employed to challenge and change student perceptions of place through critical reflection. The research brings the secondary students’ voice to the discourse of place construction. The findings suggest the teaching of place needs to move beyond the socio constructive approach to a social realist understanding of place and to adopt a holistic pedagogical approach. The thesis highlights how students need to make conscious their unconscious perceptions of place and to critically engage with the place representations they encounter if they are to develop a deep sense of distant place.

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Nasse, Jan-Marcus [Verfasser], and Ulrich [Akademischer Betreuer] Platt. "Halogens in the coastal boundary layer of Antarctica / Jan-Marcus Nasse ; Betreuer: Ulrich Platt." Heidelberg : Universitätsbibliothek Heidelberg, 2019. http://d-nb.info/118774087X/34.

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Zielcke, Johannes [Verfasser], and Ulrich [Akademischer Betreuer] Platt. "Observations of reactive bromine, iodine and chlorine species in the Arctic and Antarctic with Differential Optical Absorption Spectroscopy / Johannes Zielcke ; Betreuer: Ulrich Platt." Heidelberg : Universitätsbibliothek Heidelberg, 2015. http://d-nb.info/1180499611/34.

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Hill, Francis H. ""The Whole Foundations of the Solid Globe were Suddenly Rent Asunder": Space Place and Homelessness in Poe's "The Narrative of Arthur Gordon Pym" and Melville's "Benito Cereno"." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2280.

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My project examines the phenomenon of the hazy spaces on the periphery of the antebellum imagination that, while existing geographically at the very fringes of daily American life, are nonetheless active in the conceptualization, production, and representation of an idiosyncratic American sense of space: an anxiety of spatial fragmentation, formlessness, and modulation. In particular I am interested in Poe's “The Narrative of Arthur Gordon Pym” and Melville's “Benito Cereno,” both of which deal with American transoceanic travel to the proximity of Antarctica and its surrounding seas. These gothicized nautical fictions demonstrate an important dialectic playing out in these extreme spaces: the oscillating experience of external and closed space. What becomes detectable in antebellum literature in which spaces of enclosure interrupt expansiveness are far-reaching, deeply-rooted anxieties of an ever-transforming American space at risk of fragmenting and necessitating reorientation via the sort of imaginary travel texts being examined.

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Massardier-Galatà, Lauriane. "Succès de la reproduction de prédateurs en contexte de changements climatiques et de la dynamique océanique – Application aux « central place foragers » des zones australes, approche par la modélisation individu centrée." Thesis, Université Côte d'Azur (ComUE), 2017. http://www.theses.fr/2017AZUR4050/document.

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Les changements climatiques ont un impact certain sur les écosystèmes marins. Un déplacement vers le sud des principaux systèmes de front servant de sites de nourrissage pour de nombreuses espèces de prédateurs supérieurs est susceptible de se produire dans les zones subantarctiques. Les « central place foragers », tels que les pinnipèdes, sont susceptibles de faire face à une augmentation de la distance entre leurs lieux d'alimentation et leurs colonies d'élevage. Nous avons étudié l’impact des changements climatiques sur le succès d’élevage et la dynamique de population des otaries à fourrure (Arctocephalus gazella) des Îles Kerguelen par le biais du développement du modèle individu centré, MarCPFS (Marine Central Place Foragers Simulator) qui montre que la survie du couple femelle-jeune est particulièrement sensible à la répartition des proies (abondance et structure), à la capacité de mémorisation des meilleurs sites de nourrissages trouvés par la femelle pendant la période d'élevage, à la taille des femelles et à la distance qu'il faut parcourir pour trouver la ressource. Les résultats suggèrent qu’au cours des trois prochaines décennies un déplacement vers le sud supérieur à 2km an 1 pourrait compromettre la survie et la durabilité des populations. Un couplage avec un modèle de simulation de la dynamique océanique et de la ressource (SEAPODYM) a permis des projections jusqu’à la fin de ce siècle basées sur le scénarios RCP8.5 du GIEC (2014), confirmant les tendances mises à jour précédemment. Ces travaux montrent que les perspectives de maintien des populations sont pessimistes y compris en envisageant une adaptation de la taille des individus
Climate change has certain impact on the marine ecosystems. A southward shift in productive frontal systems serving as the main foraging sites for many top predator species is likely to occur in the Subantarctic areas. Central place foragers, as seabirds and pinnipeds, are thus likely to cope with an increase in the distance between foraging locations and their land-based breeding colonies. We studied the impact of climate change on the breeding success and population dynamics of Antarctic fur seals (Arctocephalus gazella) at Kerguelen Islands by means of an individual based model we developped, MarCPFS (Marine Central Place Foragers Simulator) which showed that the survival of the female-pup pair is particularly sensitive to the distribution of preys (abundance and structure), to the memorization abilities of the best resource sites found by the female during the rearing period, to the female size and to the foraging distance which it is necessary to cover at each trip. The results suggest that during the next three decades a southward shift greater than 2 km year-1 could compromise the survival and the sustainability of the populations. A coupling with a model of simulation of the oceanic dynamics and the resource (SEAPODYM) allowed projections till the end of this century based on scenarios RCP8.5 of the IPCC (2014), confirming the trends previously obtained. Globally, these works lead us to conclude with pessimistic perspectives about the sustainability of populations even when considering an evolution through time towards individuals of greater sizes

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Bouhier, Nicolas. "Etude de l'impact des icebergs Antarctiques sur l'Océan Austral." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0143/document.

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La calotte polaire Antarctique conditionne un flux d’eau douce dans l’océan Austral par deux voies d’égale importance : une injection immédiate et localisée par fonte des plateformes glaciaires, et une injection « offshore » et différée par production (« vêlage ») puis fonte d’icebergs. On estime ainsi que les icebergs, en fondant, pourraient modifier les caractéristiques hydrologiques et biogéochimiques de la colonne d’eau. Les modèles numériques visant à estimer cet impact présentent des résultats contrastés. Ils sont limités dans leurs stratégies de représentations des icebergs, notamment parce que les connaissances sur la distribution spatiale et de taille des icebergs ou encore leurs mécanismes de perte de masse sont réduites. Une méthode récente exploitant des mesures par altimétrie satellitaire a permis la création d’une base de données cartographiant la distribution des icebergs Antarctiques avec une couverture spatiale et temporelle inédite. Notre analyse conjointe entre ces données et des champs de concentration en glace de mer met en lumière le transport d’eau douce injecté par les icebergs et son impact sur la banquise. On analyse également les liens entre icebergs de différentes tailles : les gros peuvent être vus comme des réservoirs de volume de glace, qu’ils diffusent dans tout l’océan en se fragmentant en petits icebergs de différentes tailles. On étudie alors l’évolution de deux icebergs géants, on propose une première paramétrisation du phénomène de fracturation et analyse la distribution de taille résultante. Ces résultats peuvent permettre une représentation plus réaliste du flux d'eau douce conditionné par les icebergs dans les modèles
The Antarctic polar ice cap constrains a freshwater flaux into the Austral Ocean through two equally important pathways : a localized and immediate injection through the melting of ice-shelves bases, and a delayed offshore injection through the calving and subsequent melt of icebergs. Some studies reckon that melting icebergs have the capacity to alter the hydrological and biogeo-chemical characteristics of the water column. The numerical models trying to evaluate this impact have shown contrasting results. Yet, they might suffer from a poor representation of the icebergs, namely due to our limited knowledge on both the spatial and size distributions of the icebergs, or even the processes involved in their mass loss. A new method using satellite altimetry measurements has lead to the creation of a database mapping Antarctic icebergs distribution with an unprecedented spatial and temporal coverage. Our joint analysis between these data and sea ice concentration fields highlights a possible transport of the freshwater injected by an iceberg and its impacts on sea ice.We also analyze the links between icebergs of different sizes : the large ones can be seen as ice buffers that diffuse across the whole ocean when breaking into small fragments of various sizes. We finally study the evolution of two giant icebergs, suggest the first parametrization of the fragmentation process and analyze the subsequent size distribution of the fragments. These results can be valuable to account in a more realistic way the fresh water flux constrained by icebergs in models

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Dissertations / Theses on the topic 'Antarctic plate'

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