Sökning: "Glaciology"

Visar resultat 1 - 5 av 14 uppsatser innehållade ordet Glaciology.

  1. 1. Performance Optimization of Ice Sheet Simulation Models : Examining ways to speed up simulations, enabling for upscaling with more data

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för beräkningsvetenskap

    Författare :Fredrika Brink; [2023]
    Nyckelord :performance optimization; Python libraries; ice sheet simulations; Numba; Joblib; upscaling; parallelization;

    Sammanfattning : This study aims to examine how simulation models can be performance optimized in Python. Optimized in the sense of executing faster and enabling upscaling with more data. To meet this aim, two models simulating the Greenland ice sheet are studied. The simulation of ice sheets is an important part of glaciology and climate change research. LÄS MER

  3. 2. Monitoring of heat exchanges in thesnowpack of Foxfonna glacier, Spitzbergen,Svalbard.

    Kandidat-uppsats, Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen

    Författare :Thibault Desjonquères; [2022]
    Nyckelord :Glaciers; Glaciology; Svalbard; Geophysics; Superimposed Ice; Foxfonna; Geology.; Physics and Astronomy;

    Sammanfattning : The processes of meltwater storage in firn and the impact of refreezing on firn-coveredglaciers have been investigated on the Greenland ice-sheet. On Svalbard, climate changepromotes the disappearance of firn on glaciers. LÄS MER

  4. 3. Multi-method based characterization of calving events at Sálajiegna Glacier - Lake Sulitelma, Northern Sweden

    Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

    Författare :Martin Schulthess; [2021]
    Nyckelord :Glaciology; Glacier; Glaciers; Calving; calving front; detection algorithm; Acoustic; Acoustics; Photogrammetry; ice-ocean interactions; UAV; drone; time-lapse; Salajiegna;

    Sammanfattning : Sea level rise concerns millions of people in coastal areas across the globe. One of the largest uncertainties to project future sea level rise is the frontal ablation (accounting for calving and submarine melt) at marine ice margins, around the Greenland and Antarctic Ice Sheet. LÄS MER

  5. 4. Spatial Variability in Winter Balance on Storglaciären Modelled With a Coupled Terrain Based Approach

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Yoram Terleth; [2021]
    Nyckelord :mass balance; accumulation; snow transport; snow drift; avalanches; glaciology;

    Sammanfattning : Although most processes governing the surface mass balance on mountain glaciers are well understood, the causes and extent of spatial variability in accumulation remain poorly constrained. In the present study, the EBFM distributed mass balance model is newly coupled to terrain based modelling routines estimating mass redistribution by snowdrift, preferential deposition, and avalanching (ST-EBFM) in order to model winter balance on Storglaciären, Sweden. LÄS MER

  7. 5. Aspects of Error Quantification and Evaluation in Digital Elevation Models for Glacier Surfaces

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Jip Jan van Zoonen; [2020]
    Nyckelord :Geography; Geographical Information Systems; GIS; Physical Geography; Digital Elevation Model; DEM; Glaciology; Earth and Environmental Sciences;

    Sammanfattning : Aspects of Error Quantification and Evaluation in Digital Elevation Models for Glacier Surfaces This study explores methods to quantify and evaluate error in digital elevation models (DEMs) built from remotely sensed elevation data of the Hintereisferner glacier. A special focus lies on glacier surfaces because glaciers are often inaccessible for field observations but at the same time prone to measurement errors. LÄS MER