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Rozprawy doktorskie na temat „Glacier calving”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Wainwright, Daniel. "Calving front dynamics : External forces that lead to specific sized calving events." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-237686.

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Currently there is no extended study that explicitly focuses on themagnitude, frequency and timing of glacial calving resulting from externalforces. Past studies have identified the size and timing of calving events butthe links between them and the external factors that cause them are stillmissing. Here I present a method to identify the size, time and frequency ofcalving events on the Rink Glacier in Greenland. Using time lapse imagesspaced 30 minutes apart of the calving front, coupled with weather and tidedata, I plan on identifying the main driving force for calving. Results showthat atmo

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2

Moyer, Alexis. "Streamflow response during the rapid retreat of a lake-calving mountain glacier." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54497.

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There has been increasing attention over the last decade to the potential effects of glacier retreat on downstream discharge and aquatic habitat. Of particular interest is the timing of "peak water," when the reduction in ice area associated with retreat begins to offset the increased rate of climatic warming-induced melt. This study examines streamflow variability downstream of Bridge Glacier, in the southern Coast Mountains of BC. The glacier currently calves into a proglacial lake, and has been retreating rapidly since 1991, when the terminus retreated into an over-deepened basin. Despite

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3

Tinder, Phaedra C. "Ocean-Ice Interactions at Breiðamerkurjökull Glacier, Southeast Iceland." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1339663923.

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Bird, Lawrence. "Hydrology and thermal regime of a proglacial lake fed by a calving glacier." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/50031.

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This study was motivated by an interest in understanding the physical processes driving the thermal regime of an ice-contact proglacial lake, in the context of its influence on downstream water temperatures in the southern Coast Mountains of British Columbia, Canada. Field work was carried out at Bridge Glacier during the 2013 summer melt period, from June - September, focusing on quantifying the heat and water budgets and the thermal structure of the lake. The proglacial lake extending from the terminus of Bridge Glacier, informally referred to as `Bridge Lake', was approximately 5.9 km² and

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5

Westrin, Pontus. "External Conditions Effects on the Self-Organised Criticality of the Calving Glacier Front of Tunabreen, Svalbard." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-255867.

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Mass balance processes in glaciers are important for determining the growth or retreat of ice. Calving, the mechanical breakage of ice bergs from a glacier front, is a poorly understood phenomenon. This process has great importance to the mass balance of many glaciers, for example on Antarctica and in the Arctic. A recent paper by Åström et al. (2014) compare calving fronts to Self-Organized Critical (SOC) systems, especially the Abelian sand pile model, meaning that the calving front will stay at a critical state at all times. Fluctuations in external conditions will cause the glacier front t

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Adinugroho, Sigit. "Calving Events Detection and Quantification from Time-lapse Images : A Case Study of Tunabreen Glacier, Svalbard." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-257062.

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A fully automated method for detecting and measuring calving regions of a glacier is an important tool to gather massive statistical data of calving events. A new framework to achieve the goals is presented in this thesis. First, time-lapse images are registered to the first image in the set. Registration process makes use of the M-Estimator Sample Consensus (MSAC) method to estimate a transformation model that relates a pair of Speeded-Up Robust Features (SURF). Then, the terminus of a glacier is separated from other objects by a semi-automatic Chan-vese level-set segmentation. After that, ca

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7

Chernos, Matthew. "The relative importance of calving and surface ablation at a lacustrine terminating glacier : a detailed assessment of ice loss at Bridge Glacier, British Columbia." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/50182.

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Bridge Glacier is a lacustrine calving glacier located in the southern Coast Mountains and terminates in a 6.2 km² proglacial lake. The glacier has retreated more than 3.55 km up-valley since 1984, the majority of the retreat having occurred since 2003. While surface melt may have contributed to the retreat, calving allowed for an additional annual volume of ice loss. The relative contributions from surface melt and calving to the total volume of ice loss is examined for the 2013 melt season. Surface melt is quantified using on-glacier meteorological data to drive a distributed energy balance

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8

Viens, Robert J. "Late Holocene climate change and calving glacier fluctuations along the southwestern margin of the Stikine Icefield, Alaska /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/6737.

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9

Krug, Jean. "Intéractions calottes polaires/océan : modélisation des processus de vêlage au front des glaciers émissaires." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENU033/document.

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La contribution des calottes polaires à l'augmentation du niveau marin est un sujet de préoccupation majeure. Dans le cadre du réchauffement climatique, la dynamique de leurs glaciers émissaires évolue et ceux-ci accélèrent leur décharge de glace vers l'océan. En tant qu'exutoires des calottes polaires et régulateurs de leur perte de masse, la prise en compte de leur fonctionnement dans les prévisions d'augmentation du niveau marin est capitale. Cependant, les processus qui régissent leur dynamique sont mal contraints et il convient alors de réduire les incertitudes qui y sont liées. Les rétro

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10

Vallot, Dorothée. "Modelling calving and sliding of Svalbard outlet glaciers : Spatio-temporal changes and interactions." Doctoral thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-334787.

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Future sea level rise associated to global warming is one of the greatest societal and environmental challenges of tomorrow. A large part of the contribution comes from glaciers and ice sheets discharging ice and meltwater into the ocean and the recent worldwide increase is worrying. Future predictions of sea level rise try to encompass the complex processes of ice dynamics through glacier modelling but there are still large uncertainties due to the lack of observations or too coarse parameterisation, particularly for processes occurring at the glacier interfaces with the bed (sliding) and wit

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11

Haresign, Eleanor C. "Glacio-limnological interactions at lake-calving glaciers." Thesis, University of St Andrews, 2004. http://hdl.handle.net/10023/2793.

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Iceberg calving is an efficient ablation process which introduces mechanical instability to glacier systems and can cause non-linear climatic response. This thesis uses glaciological and limnological data to examine the relative contributions of calving and melting to mass loss at glacier termini, and the interplay between glaciological and limnological processes. Calving dynamics are investigated at two lake-terminating glaciers; Glaciar Leon in Chile and Fjallsjokull in Iceland. Glaciar Leon, a temperate, grounded outlet of the North Patagonian Icefield, terminates at an active but stable ca

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12

Mottram, Ruth. "Processes of crevasse formation and the dynamics of calving glaciers : a study at Breiđamerkurjökull." Thesis, St Andrews, 2008. http://hdl.handle.net/10023/775.

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13

Kenneally, James Patrick. "Crevassing and Calving of Glacial Ice." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/KenneallyJP2003.pdf.

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14

Roehl, Katrin, and n/a. "Terminus disintegration of debris-covered, lake-calving glaciers." University of Otago. Department of Geography, 2006. http://adt.otago.ac.nz./public/adt-NZDU20070502.112854.

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Numerous supraglacial and proglacial lakes have developed on debris-covered glaciers in conjunction with 20th-century retreat associated with global warming. When a glacier holds a substantial debris cover on its lower reach and/or is calving into a proglacial water body, the behaviour of its terminus can be modified to varying degrees compared to that of land-terminating or debris-free glaciers. The terminus is not just retreating from its frontal position but it is disintegrating through several processes that are linked. An improved understanding of these glacier margins is needed for the p

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15

Cook, Susan Jennifer. "Environmental controls on calving in grounded tidewater glaciers." Thesis, Swansea University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678282.

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16

Mansell, Damien Trevor. "Controls on the calving rate of north west Svalbard glaciers from satellite remote sensing." Thesis, Swansea University, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678560.

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17

Crossen, Kristine June. "Neoglacial fluctuations of terrestrial, tidewater, and calving lacustrine glaciers, Blackstone-Spencer Ice Complex, Kenai Mountains, Alaska /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/6735.

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18

Sergeant, Amandine. "Analyse et modélisation des ondes sismiques générées lors des séismes glaciaires induits par le vêlage d'icebergs." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC194/document.

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Les séismes glaciaires ont des magnitudes Mw~5 et sont liés au vêlage d’icebergs instables volumineux (km3). Dans le but de caractériser la force à l’origine des signaux sismiques longue-période (10-100~s) mesurés lors de tels évènements, nous développons une méthode d’inversion de la fonction source et un modèle mécanique numérique du phénomène. Grâce à l’analyse détaillée des histoires de forces inversées, nous mettons en lumière l’existence de plusieurs phénomènes responsables de la génération du signal sismique, à savoir (1) une avalanche de glace déclenchée par le détachement d’un iceberg

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19

Veitch, Stephen Alexander. "Glacial Earthquakes and Glacier Seismicity in Greenland." Thesis, 2016. https://doi.org/10.7916/D8J1035T.

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The loss of ice from the Greenland ice sheet is an important contributor to current and future sea level rise occurring due to ongoing changes in the global climate. A significant portion of this ice mass loss comes through the calving of large icebergs at Greenland’s many marine-terminating outlet glaciers. However, the dynamics of calving at these glaciers is currently not well understood, complicating projections of future behaviour of these glaciers and mass loss from the Greenland ice sheet. The use of seismological tools has shown promise as a means of both monitoring and better understa

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20

Olsen, Kira. "New Understanding of Iceberg Calving, Mass Loss, and Glacier Dynamics in Greenland Through Analysis of Glacial Earthquakes." Thesis, 2020. https://doi.org/10.7916/d8-gycj-3h54.

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I apply a suite of seismic techniques to investigate iceberg calving at large glaciers around Greenland. Iceberg calving accounts for up to half of the Greenland Ice Sheet's annual mass loss, which makes understanding the physics of the calving process vital to gaining a clear picture of current behavior and future evolution of the Greenland Ice Sheet. However, the varied and complex modes of calving behavior at individual glaciers, paired with the challenges to data collection presented by an actively calving glacier, mean that much remains unknown about the dynamics of calving at marine-term

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21

Lescarmontier, LG. "Studies of the processes of fracturing, deformation and iceberg calving in Antarctica : a history of the Mertz Glacier = Etude des processus de fracturation, déformation et vêlage d'iceberg en Antarctique : une histoire du glacier Mertz." Thesis, 2012. https://eprints.utas.edu.au/14771/11/Lydie_Lescarmontier_UTAS_PhD.pdf.

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This thesis presents a study of the processes of fracturing of an outlet glacier leading to its calving. During the CRAC-ICE program, we studied the evolution of the Mertz outlet glacier, which is located on the George V coast in East Antarctica. Before the calving event of the Mertz glacier, which took place in February 2010 releasing an iceberg of 80 km long by 35 km wide, this glacier was characterized by a floating ice tongue. This ice tongue, separated by a fault which was initiated at the beginning of the 1990s, was 150 km long by 35 km wide. Using a set of in-situ GPS data, satellite im

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