Relevant bibliographies by topics / Ice sheet modeling / Dissertations / Theses
To see the other types of publications on this topic, follow the link: Ice sheet modeling.

Dissertations / Theses on the topic 'Ice sheet modeling'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Ice sheet modeling.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Gomez, Natalya Alissa. "On Sea Level - Ice Sheet Interactions." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:11242.

Full text
Abstract:
This thesis focuses on the physics of static sea-level changes following variations in the distribution of grounded ice and the influence of these changes on the stability and dynamics of marine ice sheets. Gravitational, deformational and rotational effects associated with changes in grounded ice mass lead to markedly non-uniform spatial patterns of sea-level change. I outline a revised theory for computing post-glacial sea-level predictions and discuss the dominant physical effects that contribute to the patterns of sea-level change associated with surface loading on different timescales.
APA, Harvard, Vancouver, ISO, and other styles
2

Holmgren, Hanna. "Computational Ice Dynamics and Hydraulics : Towards a Coupling in the Ice Sheet Code ARCTIC-TARAH." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-179861.

Full text
Abstract:
Numerical ice sheet modeling is a rather young discipline: it started in the 1950s. The "first generation" models developed at that time are currently being replaced by "new generations" ones, such as e.g. ARCTIC-TARAH. ARCTIC-TARAH is a Bert Bolin Center for Climate Research spin-off from the Pennsylvania State University Ice sheet model (PSUI). When the Bolin Center received PSUI for subsequent independent development and adaption of the code to Arctic settings in 2010, an initial inspection of the source code suggested that PSUI also contained a module that allows for the treatment of glaci
APA, Harvard, Vancouver, ISO, and other styles
3

Ahlkrona, Josefin. "Implementing Higher Order Dynamics into the Ice Sheet Model SICOPOLIS." Thesis, Uppsala universitet, Avdelningen för teknisk databehandling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-146947.

Full text
Abstract:
Ice sheet modeling is an important tool both for reconstructing past ice sheets and predicting their future evolution, but is complex and computationally costly. It involves modeling a system including the ice sheet, ice shelves and ice streams, which all have different dynamical behavior. The governing equations are non-linear, and to capture a full glacial cycle more than 100,000 years need to be simulated. To reduce the problem size, approximations of the equations are introduced. The most common approximation, the Shallow Ice Approximation (SIA), works well in the ice bulk but fails in e.g
APA, Harvard, Vancouver, ISO, and other styles
4

Jonsson, Eskil. "Ice Sheet Modeling: Accuracy of First-Order Stokes Model with Basal Sliding." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-360245.

Full text
Abstract:
Some climate models are still lacking features such as dynamical modelling of ice sheets due to their computational cost which results in poor accuracy and estimates of e.g. sea level rise. The need for low-cost high-order models initiated the development of the First-Order Stokes (or Blatter-Pattyn) model which retains much of the accuracy of the full-Stokes model but is also cost-effective. This model has proven accurate for ice sheets and glaciers with frozen bedrocks, or no-slip basal boundary conditions. However, experimental evidence seems to be lacking regarding its accuracy under slidi
APA, Harvard, Vancouver, ISO, and other styles
5

Lande, Daniel Ross. "Implementation of an XML-based user interface with applications in ice sheet modeling." The University of Montana, 2009. http://etd.lib.umt.edu/theses/available/etd-12152008-222224/.

Full text
Abstract:
The scientific domain presents unique challenges to software developers. This thesis describes the application of design patterns to the problem of dynamically changing interfaces to scientific application software (GLIMMER, which performs ice sheet modeling). In its present form, GLIMMER uses a text configuration file to define model behavior, set parameters, and structure model input/output (I/O). The creation of the configuration file presents a significant problem to users due to its format and complexity. GLIMMER is still under development, and the number of changes to configuration param
APA, Harvard, Vancouver, ISO, and other styles
6

Docquier, David. "Representing grounding-line dynamics in Antarctic ice-sheet models." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209400.

Full text
Abstract:
Since the mid-20th century, global average temperatures have dramatically risen mostly due to the increasing amount of greenhouse gas emissions in the atmosphere. The effects of this recent global warming are already evident and could be exacerbated in the near future if no real action is taken. Recent ice loss in West Antarctica, monitored by satellite measurements and other techniques, gives cause for concern in such a warming world. A major part of this loss has been driven by warm water masses penetrating underneath the ice shelves in this region. This has led to a flow acceleration of the
APA, Harvard, Vancouver, ISO, and other styles
7

Robinson, Alexander. "Modeling the Greenland Ice Sheet response to climate change in the past and future." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2011/5043/.

Full text
Abstract:
The Greenland Ice Sheet (GIS) contains enough water volume to raise global sea level by over 7 meters. It is a relic of past glacial climates that could be strongly affected by a warming world. Several studies have been performed to investigate the sensitivity of the ice sheet to changes in climate, but large uncertainties in its long-term response still exist. In this thesis, a new approach has been developed and applied to modeling the GIS response to climate change. The advantages compared to previous approaches are (i) that it can be applied over a wide range of climatic scenarios (both in
APA, Harvard, Vancouver, ISO, and other styles
8

Muschitiello, Francesco. "Deglacial impact of the Scandinavian Ice Sheet on the North Atlantic climate system." Doctoral thesis, Stockholms universitet, Institutionen för geologiska vetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-128147.

Full text
Abstract:
The long warming transition from the Last Ice Age into the present Interglacial period, the last deglaciation, holds the key to our understanding of future abrupt climate change. In the last decades, a great effort has been put into deciphering the linkage between freshwater fluxes from melting ice sheets and rapid shifts in global ocean-atmospheric circulation that characterized this puzzling climate period. In particular, the regional expressions of climate change in response to freshwater forcing are still largely unresolved. This projects aims at evaluating the environmental, hydro-climati
APA, Harvard, Vancouver, ISO, and other styles
9

Beadling, Rebecca Lynn. "Impact of the Melting of the Greenland Ice Sheet on the Atlantic Meridional Overturning Circulation in 21st Century Model Projections." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/613379.

Full text
Abstract:
Contemporary observations show an increase in the melting of the Greenland Ice Sheet (GrIS) since the early 21st century. Located near the critical sites of oceanic deep convection and deep water formation, the melting of the GrIS has the potential to directly impact the Atlantic Meridional Overturning Circulation (AMOC) by freshening ocean surface waters in these regions. The majority of the Coupled Model Intercomparison Project Phase 5 (CMIP5) models project a decline in AMOC strength by 10-50% during the 21st century, in response to the increase in atmospheric greenhouse gas (GHG) concentra
APA, Harvard, Vancouver, ISO, and other styles
10

Colleoni, Florence. "On the Late Saalian glaciation : A climate modeling study." Doctoral thesis, Stockholms universitet, Institutionen för geologi och geokemi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-29284.

Full text
Abstract:
This thesis focuses on the glaciation of the Late Saalian period (160 -140 ka) over Eurasia. The Quaternary Environment of the Eurasian North (QUEEN) project determined that during this period, the Eurasian ice sheet was substantially larger than during the entire Weichselian cycle and especially that of the Last Glacial Maximum (21 ka, LGM). The Late Saalian astronomical forcing was different than during the LGM while greenhouse gas concentrations were similar. To understand how this ice sheet could have grown so large over Eurasia during the Late Saalian, we use an Atmospherical General Circ
APA, Harvard, Vancouver, ISO, and other styles
11

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.

Full text
Abstract:
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
APA, Harvard, Vancouver, ISO, and other styles
12

Helanow, Christian. "Basal boundary conditions, stability and verification in glaciological numerical models." Doctoral thesis, Stockholms universitet, Institutionen för naturgeografi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-141641.

Full text
Abstract:
To increase our understanding of how ice sheets and glaciers interact with the climate system, numerical models have become an indispensable tool. However, the complexity of these systems and the natural limitation in computational power is reflected in the simplifications of the represented processes and the spatial and temporal resolution of the models. Whether the effect of these limitations is acceptable or not, can be assessed by theoretical considerations and by validating the output of the models against real world data. Equally important is to verify if the numerical implementation and
APA, Harvard, Vancouver, ISO, and other styles
13

Hulton, Nicholas R. J. "Modelling the Greenland ice sheet." Thesis, University of Edinburgh, 1992. http://hdl.handle.net/1842/19859.

Full text
Abstract:
A dynamic, vertically integrated, three-dimensional, mass continuity, computer model of the Greenland ice sheet is used to predict the ice sheet's response to climatic perturbation. The ice flow is gravity driven according to glaciological physics, whereby ice flow is claculated as the sum of deformation and sliding components averaged over the ice thickness where longitudinal stresses are considered negligible. The model has inputs of the present-day ice surface and basal topography, and is forced by changes in sea level and surface mass balance, which are modelled by separately described and
APA, Harvard, Vancouver, ISO, and other styles
14

Le, clec'h Sébastien. "Sensibilité et rétroactions de la calotte groenlandaise face à des changements climatiques passé et futur." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLV003/document.

Full text
Abstract:
L’évolution future de la calotte groenlandaise est une préoccupation sociétale majeure de par sa contribution potentielle à la remontée du niveau marin global. Elle est contrôlée par la dynamique de la glace et les conditions climatiques. Sa modélisation est un véritable défi à cause du manque de données disponibles à l’échelle de la calotte, et des processus d’interactions climat-calotte à très fine échelle. Pour mieux comprendre le rôle du Groenland dans le système climatique, j’ai d’abord développé une méthode d’inversion pour obtenir des conditions initiales fiables du modèle de glace GRIS
APA, Harvard, Vancouver, ISO, and other styles
15

Löfgren, André. "Numerical ice sheet modelling using FEniCS." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-396571.

Full text
Abstract:
The increase in computational power in the last 20 years has made it feasible to solve the full Stokes equation for ice flow, using finite element methods (FEM). However, the numerical properties of these equations remains largely unknown. This is due to their nonlinear nature, which makes them hard to analyze mathematically. For this reason convergence rate and stability has to be established by performing simulations. In this thesis a 2D ice solver has been developed. The solver was then tested on the ISMIP-HOM benchmarks, in order to assert convergence rates and stability. The solver was de
APA, Harvard, Vancouver, ISO, and other styles
16

Payne, Antony John. "Modelling former ice sheets." Thesis, University of Edinburgh, 1988. http://hdl.handle.net/1842/19225.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

Sargent, Aitbala. "Modeling Ice Streams." Fogler Library, University of Maine, 2009. http://www.library.umaine.edu/theses/pdf/SargentA2009.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Seguinot, Julien. "Numerical modelling of the Cordilleran ice sheet." Doctoral thesis, Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-106815.

Full text
Abstract:
This doctoral dissertation presents a study of the glacial history of the North American Cordillera using numerical ice sheet modelling calibrated against field evidence. This area, characterized by the steep topography of several mountain ranges separated by large inter-montane depressions, was once covered by a large-scale ice mass: the former Cordilleran ice sheet. Because of the irregular topography on which the ice sheet formed, geological studies have often had only local or regional relevance, thus leaving the Cordilleran ice sheet least understood among Pleistocene ice sheets in terms
APA, Harvard, Vancouver, ISO, and other styles
19

Wang, Zheng. "Numerical modelling of the Antarctic ice sheet." Thesis, University of Edinburgh, 2002. http://hdl.handle.net/1842/23244.

Full text
Abstract:
This thesis develops a three-dimensional time-dependent numerical model that dynamically simulates the evolution of the flow and thermal regime of the Antarctic Ice Sheet in response to climatic changes. As one of the most important heat sinks and water reservoirs in the Earth’s energy and water systems, the behaviour of the Antarctic Ice Sheet strongly influences the natural environment on the Earth. This thesis first reviews the factors that affect the thermal and dynamical processes in the Antarctic Ice Sheet system and quantifies their functions in the system by setting up their mathematic
APA, Harvard, Vancouver, ISO, and other styles
20

Liakka, Johan. "The mutual interaction between the time-mean atmospheric circulation and continental-scale ice sheets." Doctoral thesis, Stockholms universitet, Meteorologiska institutionen (MISU), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-55931.

Full text
Abstract:
Geomorphological evidence of glaciations exist for the Last Glacial Maximum (about 20 kyr ago). At this time, both North America and Eurasia were covered by extensive ice sheets which are both absent today. However, the temporal and spatial evolution of the ice sheets from the previous interglacial up to the fully-glaciated conditions at LGM is still unresolved and remains a vexing question in climate dynamics. The evolution of ice sheets is essentially controlled by the prevailing climate conditions. On glacial time-scales, the climate is shaped the by the orbital variations of the Earth, but
APA, Harvard, Vancouver, ISO, and other styles
21

Kenneway, Debra A. "Higher-Order Physic for Modeling Ice Streams in Ice Sheets." Fogler Library, University of Maine, 2010. http://www.library.umaine.edu/theses/pdf/KennewayDA2010.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

Banwell, Alison Frances. "Modelling the hydrology of the Greenland Ice Sheet." Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/267715.

Full text
Abstract:
There is increasing recognition that the hydrology of the Greenland Ice Sheet plays an important role in the dynamics and therefore mass balance of the ice sheet. Understanding the hydrology of the ice sheet and being able to predict its future behaviour is therefore a key aspect of glaciological research. To date, the ice sheet’s hydrology has tended to be inferred from the analysis of surface velocity measurements, or modelled in a theoretical, idealised way. This study focuses on the development of a high spatial (100 m) and temporal (1 hour) resolution, physically based, time-dependent hyd
APA, Harvard, Vancouver, ISO, and other styles
23

Karatay, Mehmet Rahmi. "Modelling the hydrology of the Greenland ice sheet." Thesis, University of Edinburgh, 2011. http://hdl.handle.net/1842/5282.

Full text
Abstract:
This thesis aims to better understand the relationships between basal water pressure, friction, and sliding mechanisms at ice sheet scales. In particular, it develops a new subglacial hydrology model (Hydro) to explicitly predict water pressures in response to basal water production and water injection from the surface. Recent research suggests that the Greenland ice sheet (gis) is losing a substantial volume of ice through dynamic thinning. This process must be modelled to accurately assess the contribution of the gis to sea-level rise in future warming scenarios. A key control on dynamic thi
APA, Harvard, Vancouver, ISO, and other styles
24

Jamieson, Stewart S. R. "Modelling landscape evolution under ice sheets." Thesis, University of Edinburgh, 2008. http://hdl.handle.net/1842/29818.

Full text
Abstract:
This thesis details the application of numerical modelling techniques to simulate erosion under ice sheets with the aim of better understanding the interrelationships between glacial erosion, long-term landscape evolution and ice dynamics. A model is developed that predicts patterns of basal erosion in a glaciologically sensible manner and shows that ‘fluvial’ landscapes can become ‘glacial’ systems within 100 kyrs. By simulating ice sheet growth and erosion over synthetic landscapes of varying form, amplitude and wavelength the topographic characteristics that are most critical to the evoluti
APA, Harvard, Vancouver, ISO, and other styles
25

Schannwell, Clemens. "Modelling ice dynamic sea-level rise from the Antarctic Peninsula Ice Sheet." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7775/.

Full text
Abstract:
The Antarctic Peninsula (AP) has been one of the most rapidly warming regions on this planet. This warming has been accompanied by major glaciological changes such as tidewater glacier retreat, ice-shelf retreat and collapse alongside acceleration of outlet glaciers in response to ice-shelf removal. As faster owing glaciers deliver more ice from the ice sheet's interior to the margins, the AP has been identified as an important contributor to global sea-level rise (SLR). However, comprehensible SLR projections of the AP induced by ice dynamics over the next three centuries are still lacking. I
APA, Harvard, Vancouver, ISO, and other styles
26

Green, Clare L. "Modelling the Impact of the Barents Ice Sheet Collapse." Thesis, University of Sheffield, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522002.

Full text
APA, Harvard, Vancouver, ISO, and other styles
27

Henderson, Browne Oliver James. "Numerical modelling of large-scale ice-sheet-climate interactions." Thesis, University of Reading, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515704.

Full text
APA, Harvard, Vancouver, ISO, and other styles
28

Lhomme, Nicolas. "Modelling water isotopes in polar ice sheets." Thesis, Université Joseph Fourier (Grenoble), 2004. http://hdl.handle.net/2429/17134.

Full text
Abstract:
Concentrations of water isotopes in marine sediments and ice cores are a key indicator for estimating global and regional fluctuations of past temperatures. Interpreting these concentrations requires an understanding of the storage capacity and exchanges among the ocean, atmosphere and cryosphere as well as an understanding of the dynamical behaviour of these reservoirs. The contribution of the latter remains poorly established because of the paucity of deep ice cores in Greenland and Antarctica and the difficulty of interpreting these cores. To obtain the water isotope composition of po
APA, Harvard, Vancouver, ISO, and other styles
29

Dolan, Aisling Margaret. "Modelling mid-Pliocene climate and ice sheets." Thesis, University of Leeds, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.590483.

Full text
Abstract:
Given anthropogenic modification of the climate system, the future stability of Earth's major ice sheets and sea level is uncertain. One potential, lJ1ethod to investigate the behaviour of the Greenland and Antarctic ice sheets under a warmer-than-modern climate regime, is to look back at past warm periods of Earth history (for example the mid Pliocene Warm Period; 3.26 - 3.0 million years ago). The British Antarctic Survey Ice Sheet Model (BASISM) and the Hadley Centre Coupled Climate Model version 3 (HadCM3) allow the climate and ice sheets of the mid-Pliocene to be modelled, and their sensi
APA, Harvard, Vancouver, ISO, and other styles
30

Lecavalier, Benoit. "A Model of the Greenland Ice Sheet Deglaciation." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/30362.

Full text
Abstract:
The goal of this thesis is to improve our understanding of the Greenland ice sheet (GrIS) and how it responds to climate change. This was achieved using ice core records to infer elevation changes of the GrIS during the Holocene (11.7 ka BP to Present). The inferred elevation changes show the response of the ice sheet interior to the Holocene Thermal Maximum (HTM; 9-5 ka BP) when temperatures across Greenland were warmer than present. These ice-core derived thinning curves act as a new set of key constraints on the deglacial history of the GrIS. Furthermore, a calibration was conducted on a th
APA, Harvard, Vancouver, ISO, and other styles
31

Glasser, N. F. "Modelling the effects of topography on ice sheet erosion, Scotland." Thesis, University of Edinburgh, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521039.

Full text
APA, Harvard, Vancouver, ISO, and other styles
32

Siegert, Martin John. "Numerical modelling studies of the Svalbard-Barents Sea Ice Sheet." Thesis, University of Cambridge, 1993. https://www.repository.cam.ac.uk/handle/1810/273251.

Full text
APA, Harvard, Vancouver, ISO, and other styles
33

Hunter, Stephen James. "Modelling Antarctic Ice Sheets under Greenhouse Earth Conditions." Thesis, University of Leeds, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521464.

Full text
APA, Harvard, Vancouver, ISO, and other styles
34

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.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Ahlkrona, Josefin. "Computational Ice Sheet Dynamics : Error control and efficiency." Doctoral thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-283442.

Full text
Abstract:
Ice sheets, such as the Greenland Ice Sheet or Antarctic Ice Sheet, have a fundamental impact on landscape formation, the global climate system, and on sea level rise. The slow, creeping flow of ice can be represented by a non-linear version of the Stokes equations, which treat ice as a non-Newtonian, viscous fluid. Large spatial domains combined with long time spans and complexities such as a non-linear rheology, make ice sheet simulations computationally challenging. The topic of this thesis is the efficiency and error control of large simulations, both in the sense of mathematical modelling
APA, Harvard, Vancouver, ISO, and other styles
36

Tulley, Matthew J. C. "Numerical modelling of erosion and deposition beneath Quaternary ice sheets." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388461.

Full text
APA, Harvard, Vancouver, ISO, and other styles
37

Löfverström, Marcus. "On the interaction between ice sheets and the large-scale atmospheric circulation over the last glacial cycle." Doctoral thesis, Stockholms universitet, Meteorologiska institutionen (MISU), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-107925.

Full text
Abstract:
The last glacial cycle (c. 115-12 kyr BP) was the most recent in a series of recurring glaciations of the subpolar continents. Massive ice sheets evolved in Eurasia and North America, which, at their maximum, were of continental scale and together lowered the global sea-level by approximately 100 m. The paleo-modelling community has focused on the last glacial maximum (LGM, ~ 20 kyr BP), leaving the longer period when the ice sheets evolved to their LGM configurations largely unexplored. In this thesis we study the mutual interaction between the time-mean atmospheric circulation and the evolut
APA, Harvard, Vancouver, ISO, and other styles
38

Morris, Richard M. "Modelling melt, refreezing and runoff across the surfaces of high-latitude ice masses : Devon Ice Cap, Nunavut, Canada and the Greenland Ice Sheet." Thesis, University of Aberdeen, 2013. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=198040.

Full text
Abstract:
Rising global air temperatures are causing increased melting across the surfaces of large ice masses such as the Greenland Ice Sheet and the ice caps of Arctic Canada. The fraction of this melt that refreezes within the snow and firn has a large spatial variability across the surfaces of these ice masses. This spatial variability is an important control on the surface mass balance, and has important implications for the interpretation of satellite radar altimetry data sets. The sensitivity of large ice masses to climate change depends on changes in the melt-runoff relationship, and changes in
APA, Harvard, Vancouver, ISO, and other styles
39

Slater, Donald Alexander. "Modelling submarine melting at tidewater glaciers in Greenland." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28899.

Full text
Abstract:
The recent thinning, acceleration and retreat of tidewater glaciers around Greenland suggests that these systems are highly sensitive to a change in climate. Tidewater glacier dynamics have already had a significant impact on global sea level, and, given projected future climate warming, will likely continue to do so over the coming century. Understanding of the processes connecting climatic change to tidewater glacier response is, however, at an early stage. Current leading thinking links tidewater glacier change to ocean warming by submarine melting of glacier calving fronts, yet the process
APA, Harvard, Vancouver, ISO, and other styles
40

Kerr, Andrew Robert. "Modelling the response of ice sheets to climatic change and topography." Thesis, University of Edinburgh, 1993. http://hdl.handle.net/1842/19896.

Full text
Abstract:
The aim of this project is to investigate the influence of climate and topography on ice sheets in maritime environments. Numerical models are adapted to simulate the behaviour of the climate and ice sheets in southern Chile and Scotland during the last glaciation. The climate model relates climatic variables to snow accumulation and ablation using an energy balance model. The ice sheet model is based on the continuity equation for ice thickness and relates surface mass exchange to ice thickness and flow. Subsequently, a simple topography model is developed to examine the critical transition b
APA, Harvard, Vancouver, ISO, and other styles
41

Arnold, Neil Stuart. "Modelling the influence of glacier hydrology on the dynamics of the Scandinavian Ice Sheet." Thesis, University of Cambridge, 1994. https://www.repository.cam.ac.uk/handle/1810/273247.

Full text
APA, Harvard, Vancouver, ISO, and other styles
42

Koziol, Conrad Pawel. "Modelling the impact of surface melt on the hydrology and dynamics of the Greenland Ice Sheet." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/273345.

Full text
Abstract:
Increasing surface runoff from the Greenland Ice Sheet due to a warming climate not only accelerates ice mass loss by altering surface mass balance, but may also lead to increased dynamic losses. This is because surface melt draining to the bed can reduce ice-bed coupling, leading to faster ice flow. Understanding the impact of surface melt on ice dynamics is important for constraining the contribution of the Greenland Ice Sheet to sea level rise. The aim of this thesis is to numerically model the influence of surface runoff on ice velocities. Three new models are presented: an updated supragl
APA, Harvard, Vancouver, ISO, and other styles
43

Gregoire, Lauren J. "Modelling the Northern Hemisphere climate and ice sheets during the last deglaciation." Thesis, University of Bristol, 2011. http://hdl.handle.net/1983/cd4356b4-68bb-4181-91e0-2f6d46d663f7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
44

Gasson, Edward G. W. "The past relationship between temperature and sea level - from proxy records and ice sheet modelling." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627930.

Full text
Abstract:
Due to current uncertainties about the response of the ice sheets to anthropogenic climate forcing, there has been a growing interest in what the palaeo-record can tell us about the past response of the ice sheets to natural climate forcings. Direct qualitative and quantitative inferences have been made based on the past relationships between climate and sea level (which parallels ice sheet changes). Here we attempt to define better the past relationship between temperature and sea level. We first review existing temperature and sea level records, with a discussion of uncertainty in each of th
APA, Harvard, Vancouver, ISO, and other styles
45

Pohl, Alexandre. "Compréhension du climat de l’Ordovicien à l’aide de la modélisation numérique." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLV081.

Full text
Abstract:
L’Ordovicien (485–444 Ma) est une période géologique caractérisée par laconcomitance d’une glaciation majeure et de l’une des 5 plus grandes extinctions de masse del’histoire de la Terre. Cette thèse avait pour objectif d’améliorer la compréhension de l’évolutiondu climat à cette époque à l’aide de la modélisation numérique, ain de fournir une imagecohérente de la glaciation. Nous avons d’abord démontré que la coniguration continentaleordovicienne induit une dynamique océanique particulière, à l’origine d’une instabilité climatiquepermettant un refroidissement brutal du climat global sans vari
APA, Harvard, Vancouver, ISO, and other styles
46

Leeson, Amber Alexandra. "Insights from observations and modelling into the evolution of superglacial lakes on the Greenland ice sheet." Thesis, University of Leeds, 2013. http://etheses.whiterose.ac.uk/5060/.

Full text
Abstract:
Supraglacial lakes (SGLs) form when runoff (meltwater + rain) pools in depressions on the Greenland ice sheet (GrIS). SGLs can collectively affect seasonal ice sheet flow rates when they drain episodically; although the net impact on flow speed is uncertain. In this thesis: 1) a new model of SGL Initiation and Growth (the SLInG model) is presented, 2) existing SGL observations are evaluated and combined to form a single optimised dataset, 3) these data are used to evaluate the model and 4) this model is used to investigate past trends in SGL evolution in south west Greenland. SLInG is a 2-dime
APA, Harvard, Vancouver, ISO, and other styles
47

Burgess, P. E. "Future climatic and cryospheric change on millennial timescales : an assessment using two-dimensional climate modelling studies." Thesis, University of East Anglia, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266737.

Full text
APA, Harvard, Vancouver, ISO, and other styles
48

Matero, Ilkka Seppo Olavi. "Modelling the early-Holocene Laurentide Ice Sheet collapse and abrupt climate change : implications for the 8.2 ka event." Thesis, University of Leeds, 2018. http://etheses.whiterose.ac.uk/22575/.

Full text
Abstract:
Recent research suggested that the deglaciation of an ice saddle connecting three ice domes around Hudson Bay ˜8.5 ka produced a large meltwater pulse. The resulting freshwater input to the North Atlantic was proposed as having caused the most pronounced climate change event of the Holocene, the 8.2 ka event. However, modelling experiments focussing on this saddle collapse meltwater and its climatic impact have not yet been carried out. This thesis aims to establish whether such a meltwater pulse could have forced the 8.2 ka event, and if so, to better constrain the pulse through climate and i
APA, Harvard, Vancouver, ISO, and other styles
49

Callens, Denis. "Impact of improved basal and surface boundary conditions on the mass balance of the Sr Rondane Mountains glacial system, Dronning Maud Land, Antarctica." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209217.

Full text
Abstract:
Mass changes of polar ice sheets have an important societal impact, because they affect global sea level. Estimating the current mass budget of ice sheets is equivalent to determining the balance between the surface mass gain through precipitation and the outflow across the grounding line. In Antarctica, the latter is mainly governed by oceanic processes and outlet glacier dynamics.<p>In this thesis, we assess the mass balance of a part of eastern DronningMaud Land via an input/output method. Input is given by recent surface accumulation estimations of the whole drainage basin. The outflow at
APA, Harvard, Vancouver, ISO, and other styles
50

Riger-Kusk, Mette. "Ice dynamics of the Darwin-Hatherton glacial system, Transantarctic Mountains, Antarctica." Thesis, University of Canterbury. Geography, 2011. http://hdl.handle.net/10092/6602.

Full text
Abstract:
The Darwin-Hatherton glacial system (DHGS) drains from the East Antarctic Ice Sheet (EAIS) and through the Transantarctic Mountains (TAM) before entering the Ross Embayment. Large ice-free areas covered in glacial sediments surround the DHGS, and at least five glacial drift sheets mark the limits of previous ice extent. The glacier belongs to a group of slow-moving EAIS outlet glaciers which are poorly understood. Despite this, an extrapolation of a glacial drift sheet boundary has been used to determine the thickness of the EAIS and the advanced West Antarctic Ice Sheet (WAIS) during the Last
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Ice sheet modeling' for other source types:
Journal articles Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography