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Tesis sobre el tema "Marine Ice sheet"

Autor: Grafiati

Publicado: 25 de mayo de 2024

Última modificación: 31 de julio de 2025

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1

Koester, Alexandria Jo. "Rapid thinning of the Laurentide Ice Sheet in coastal Maine, USA during late Heinrich Stadial 1:." Thesis, Boston College, 2017. http://hdl.handle.net/2345/bc-ir:107308.

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Thesis advisor: Jeremy D. Shakun<br>Few data are available to infer the thinning rate of the Laurentide Ice Sheet (LIS) through the last deglaciation, despite its importance for constraining past ice sheet response to climate warming. We measured 31 cosmogenic 10Be exposure ages in samples collected on coastal mountainsides in Acadia National Park and from the slightly inland Pineo Ridge moraine complex, a ~100-km-long glaciomarine delta, to constrain the timing and rate of LIS thinning and subsequent retreat in coastal Maine. Samples collected along vertical transects in Acadia National Park

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2

Nicholl, Joseph Anthony Leo. "Changes in ice sheet dynamics across the mid-Pleistocene transition recorded in North Atlantic sediments." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648858.

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3

Simmons, Sarah-Louise. "An investigation into the effect of glacially exported nutrients from the Greenland Ice Sheet on marine primary production." Thesis, University of Bristol, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.742982.

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4

Cook, Carys Patricia. "Insights into the behaviour of the Pliocene East Antarctic ice sheet from provenance studies of marine sediments using radiogenic isotopoes." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/14262.

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Direct evidence for the response of Earth’s largest continental ice mass, the East Antarctic ice sheet (EAIS), to climatic warmth is extremely limited. The primary aim of this thesis is to improve understanding of the behaviour of the EAIS during the warmer-than-present Pliocene Epoch (2.58 to 5.33 million years ago). To this end, I analysed the radiogenic neodymium and strontium isotopic provenance of fine-grained (<63μm) Pliocene detrital marine sediments deposited offshore of the East Antarctic continent, which can provide information on source bedrock characteristics, continental erosional

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5

Sacchetti, Fabio. "Late Quaternary sedimentation associated with the British-Irish Ice Sheet on the NW Irish continental slope: a marine geological and geophysical investigation." Thesis, University of Manchester, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.646396.

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This research demonstrates the impact that glaciations had on the geomorphology and sediment deposition of the NW Irish continental margin, including both sides of the Rockall Trough and the Rockall Bank. A modern hydrographic, geophysical and sedimentological approach is used to analyse and interpret new and historical datasets, including multi beam, sidescan sonar, seismic and core data. New methodologies such as CUBE and Geocoder algorithms for multi beam bathymetry and backscatter data processing, 3D visualisations, ArcGIS Spatial and Hydrological Analysis and digital X-Ray scanning are us

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6

Leigh, Sasha Naomi Bharier. "A study of the dynamics of the British Ice Sheet during Marine Isotope Stages 2 and 3, focusing on Heinrich Events 2 and 4 and their relationship to the North Atlantic glaciological and climatological conditions /." St Andrews, 2007. http://hdl.handle.net/10023/525.

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7

Hibbert, Fiona Danielle. "Dynamics of the British Ice Sheet and prevailing hydrographic conditions for the last 175,000 years : an investigation of marine sediment core MD04-2822 from the Rockall Trough." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/3136.

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This study presents a stratigraphic investigation of the marine sediment core MD04-2822 from the Rockall Trough (56° 50.54' N, 11° 22.96' W; 2344 m water depth). This core is currently the only available high resolution record for the calibration of Late Quaternary sedimentary sequences of the British (Hebridean) margin. It therefore offers an unprecedented archive of changing sedimentological and climatological conditions for the last 175,000 years. The high resolution, multi-proxy records have enabled surface and deep water conditions within the Rockall Trough to be reconstructed. In additio

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8

Hill, Heather W. "Abrupt climate change during the last glacial period : a Gulf of Mexico perspective." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001539.

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9

Van, Aalderen Victor. "Modéliser l'évolution du climat global et de la calotte eurasienne pendant la dernière déglaciation." Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASJ029.

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La calotte marine de l'Antarctique de l'Ouest présente la particularité d'être en grande partie en contact avec l'océan. Les dernières observations révèlent une accélération de sa perte de masse sur les dernières décennies, essentiellement provoquée par l'augmentation de la fonte sous les plateformes de glace flottante. En revanche, son évolution future reste très incertaine, du fait de notre mauvaise compréhension des processus physiques mis en jeu entre la calotte et l'océan.La dernière déglaciation (-21 000 - -11 000 ans), constitue l'un des changements climatiques majeurs les plus récents

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10

Nowicki, Sophie Marie Jeanne. "Modelling the transition zone of marine ice sheets." Thesis, University College London (University of London), 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499076.

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11

Davison, Stephen. "Reconstructing the last Pleistocene (Late Devensian) glaciation on the continental margin of northwest Britain." Thesis, University of Edinburgh, 2005. http://hdl.handle.net/1842/766.

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The continental margin in the area west of Shetland was subjected to repeated and extensive ice sheet advances during the Late Pleistocene. Seabed imagery, seismic survey and borehole core data show the Late Devensian ice sheets expanded across the continental shelf three times, two of these advances reaching the shelf edge. On the inner shelf, where present-day water depths are generally less than 100m, only thin sediments from the last retreat phase and exposed rock surfaces remain, all other deposits from earlier phases having been removed by the last advance. On the mid to outer shelf elem

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12

Brionne, Charles. "Signatures morphosédimentaires de la dynamique juxta-glaciaire à la transition de fronts glaciaires marins à terrestres : le cas de la Côte-Nord du Québec (estuaire et golfe du St Laurent)." Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAH005.

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Cette thèse combine une double approche géomorphologique et sédimentologique associée à l’utilisation de données LiDAR, bathymétriques, photogrammétrie drone et de datations radiocarbones. Elle a permis de reconstituer les paléos dynamiques glaciaires en contexte de déglaciation pour l’Inlandsis Laurentidien depuis le dernier maximum glaciaire, il y a environ 20 000 ans, et plus précisément au passage d’une marge glaciaire ancrée en mer à une marge glaciaire continentale Deux études ont été menées conjointement, soit : (1) la cartographie, la synthèse et la proposition d’un modèle concernant l

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13

Sabine, Marjolaine. "Contribution relative des forçages climatiques et des processus sédimentaires dans la répartition spatio-temporelle des sédiments des mers nordiques (mers de Norvège, du Groenland et de Barents)." Thesis, Bordeaux, 2021. http://www.theses.fr/2021BORD0047.

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Ce travail présente une analyse des environnements sédimentaires marins profonds des mers nordiques à l’interface de l’Atlantique nord et de l’Arctique (mers du Groenland, de Norvège, de Barents et d’Islande) au cours du dernier million d’années. Il se base sur une base de données acoustiques (bathymétrie, imagerie multifaisceau) et sédimentologique (carottes calypso) issues de deux campagnes réalisées par le Shom. Les enregistrements sédimentaires ont montré une très grande variabilité des processus de sédimentation en jeu dans ces mers en fonction des périodes climatiques, avec notamment une

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14

Tooze, SC. "Characterising the deglacial history of the East Antarctic ice sheet in central Wilkes Land using marine sediment cores." Thesis, 2022. https://eprints.utas.edu.au/47561/1/Tooze_whole_thesis.pdf.

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The East Antarctic Ice Sheet (EAIS) retains the largest volume of ice on the planet and has the capacity to raise global sea level by a substantial 52 m. Marine-based sectors of the EAIS are particularly susceptible to retreat and collapse and are currently losing mass at an unprecedented rate. Masked by kilometres of ice and shielded by extensive sea-ice proximal to the coast, central Wilkes Land (between 105-128°E) is one of the most poorly investigated regions of the EAIS. The Totten Glacier, situated in a trench at the Sabrina Coast of central Wilkes Land, drains the largest portion of the

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15

"Laurentide ice sheet meltwater influences and millennial-scale climate oscillations on the northwestern slope of the Gulf of Mexico during Marine Isotope Stage 6 and Termination II." Thesis, 2009. http://hdl.handle.net/1911/61948.

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Sub-Milankovitch climate oscillations are well documented phenomena in the Gulf of Mexico during Marine Isotope Stage (MIS) 3 and Termination I, however very little is known about equivalent events during older time intervals. Basin 4 is located on the northwest slope of the Gulf of Mexico and has provided a detailed record of late MIS 6 and Termination II. The results of this study show that the delta18O record of planktonic foraminifer G. ruber contains millennial-scale climate oscillations during MIS 6, a series of meltwater spikes, and a climate reversal during Termination II. Paired delta

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16

"Numerical and theoretical treatment of grounding line movement and ice shelf buttressing in marine ice sheets." NEW YORK UNIVERSITY, 2010. http://pqdtopen.proquest.com/#viewpdf?dispub=3365701.

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17

"Diachronous behavior of the Antarctic ice sheets: Weddell Sea, Antarctica." Thesis, 2012. http://hdl.handle.net/1911/70453.

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Inaccessibility due to harsh weather conditions and perennial sea ice has left the Weddell Sea embayment (WSE) vastly under-studied in comparison to other regions of Antarctica. Yet understanding its deglacial history since the Last Glacial Maximum (LGM) is vital for understanding the dynamics and stability of the Antarctic ice sheet. Additionally, the debate continues as to the magnitude and timing of West Antarctic Ice Sheet (WAIS), Antarctic Peninsula Ice Sheet (APIS) and East Antarctic Ice Sheet (EAIS) advance during the LGM. Here we present geologic and geophysical evidence from the south

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18

Swadling, KM. "Influence of seasonal ice formation on life cycle strategies of Antarctic copepods." Thesis, 1998. https://eprints.utas.edu.au/22306/1/whole_SwadlingKerrieMarguerite1998_thesis_.pdf.

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Zooplankton from inshore marine and marine-derived lacustrine Antarctic habitats were studied over two summers and the intervening winter from December 1993 to March 1995 at two sites in the Vestfold Hills region, East Antarctica. Particular emphasis was placed on the interaction between fast ice and the underlying water column, and the effect of this on the ecology of dominant copepod species. The overwintering strategies of commonly found copepods were investigated. The sea ice habitat was characterised by high abundance and low diversity of metazoans. Paralabidocera antarctica dominated th

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19

Potter, Emma-Kate. "Sea level, ice sheets and climate during marine isotope sub-stages 5a and 5c." Phd thesis, 2002. http://hdl.handle.net/1885/148684.

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20

Pesjak, L. "The variability of ocean circulation, productivity, and sea ice in the Adélie region, East Antarctica, over the last two glacial cycles." Thesis, 2022. https://eprints.utas.edu.au/47523/1/Pesjak_whole_thesis.pdf.

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Present-day observations near Antarctica’s ice sheets suggest anthropogenic warming is affecting ocean circulation, with implications for further ice sheet melt, and changes to global thermohaline circulation. The mechanisms for ocean-ice sheet-sea ice changes are uncertain, and it is unclear how they will respond to warmer than present climates. Sediment records on the Antarctic continental margin provide evidence of significant changes with respect to productivity, ice sheet size and ocean circulation, on glacial to interglacial timescales. In this thesis, I describe the integrated response

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21

Darlington, Andrea. "Geophysical constraints on mantle viscosity and its influence on Antarctic glacial isostatic adjustment." Thesis, 2012. http://hdl.handle.net/1828/4001.

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Glacial isostatic adjustment (GIA) is the process by which the solid Earth responds to past and present-day changes in glaciers, ice caps, and ice sheets. This thesis focuses on vertical crustal motion of the Earth caused by GIA, which is influenced by several factors including lithosphere thickness, mantle viscosity profile, and changes to the thickness and extent of surface ice. The viscosity of the mantle beneath Antarctica is a poorly constrained quantity due to the rarity of relative sea-level and heat flow observations. Other methods for obtaining a better-constrained mantle viscosity

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