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Fletta eftir efnisorði "Jöklafræði"

Fletta eftir efnisorði "Jöklafræði"

Röðun: Raða: Niðurstöður:

  • Gopalan, Giridhar Raja; Hrafnkelsson, Birgir; Adalgeirsdottir, Gudfinna; Jarosch, Alexander H.; Pálsson, Finnur (Copernicus GmbH, 2018-07-11)
    Bayesian hierarchical modeling can assist the study of glacial dynamics and ice flow properties. This approach will allow glaciologists to make fully probabilistic predictions for the thickness of a glacier at unobserved spatiotemporal coordinates, and ...
  • Brynjólfsson, Skafti (Norwegian University of Science and Technology; University of Iceland, 2015-09)
    This thesis describes the glacial history, glacier dynamics, sediments and landforms of the Drangajökull ice cap as well as the glacial history and dynamics of the eastern Vestfirðir peninsula in northwest Iceland from the Late Weichselian until present. ...
  • Cook, Eliza; Davies, Siwan M.; Guðmundsdóttir, Esther Ruth; Abbott, Peter M.; Pearce, Nicholas J. G. (Wiley-Blackwell, 2018-02)
    Contiguous sampling of ice spanning key intervals of the deglaciation from the Greenland ice cores of NGRIP, GRIP and NEEM has revealed three new silicic cryptotephra deposits that are geochemically similar to the well‐known Borrobol Tephra (BT). The ...
  • Andreassen, Liss M.; Elvehøy, Hallgeir; Kjøllmoen, Bjarne; Belart, Joaquín M. C. (Cambridge University Press (CUP), 2020-02-13)
    Abstract In this paper, we give an overview of changes in area, length, surface elevation and mass balance of glaciers in mainland Norway since the 1960s. Frontal advances have been recorded in all regions except the northernmost glaciers in Troms and ...
  • Mackay, Jonathan D.; Barrand, Nicholas E.; Hannah, David M.; Krause, Stefan; Jackson, Christopher R.; Everest, Jez; Adalgeirsdottir, Gudfinna (Copernicus GmbH, 2018-07-06)
    Glacio-hydrological models (GHMs) allow us to develop an understanding of how future climate change will affect river flow regimes in glaciated watersheds. A variety of simplified GHM structures and parameterisations exist, yet the performance of these ...
  • Gopalan, Giri; Hrafnkelsson, Birgir; Wikle, Christopher K.; Rue, Håvard; Adalgeirsdottir, Gudfinna; Jarosch, Alexander H.; Pálsson, Finnur (Springer Science and Business Media LLC, 2019-06-12)
    In this paper, we extend and analyze a Bayesian hierarchical spatiotemporal model for physical systems. A novelty is to model the discrepancy between the output of a computer simulator for a physical process and the actual process values with a ...
  • Schmidt, Louise Steffensen; Hvidberg, Christine Schøtt; Kim, Jung Rack; Karlsson, Nanna Bjørnholt (Cambridge University Press (CUP), 2019-09-30)
    The Martian mid-latitudes contain numerous small water-ice deposits, collectively termed viscous flow features (VFFs). The shape and topography of the deposits contain information on their past flow history and formation process. In order to access ...
  • Minchew, Brent; Simons, Mark; Björnsson, Helgi; Pálsson, Finnur; Morlighem, Mathieu; Seroussi, Helene; Larour, Eric; Hensley, Scott (Cambridge University Press (CUP), 2016-02)
    The mechanical properties of glacier beds play a fundamental role in regulating the sensitivity of glaciers to environmental forcing across a wide range of timescales. Glaciers are commonly underlain by deformable till whose mechanical properties and ...
  • Schomacker, Anders; Farnsworth, Wesley; Ingolfsson, Olafur; Allaart, Lis; Håkansson, Lena; Retelle, Michael; Siggaard-Andersen, Marie-Louise; Korsgaard, Niels Jákup; Rouillard, Alexandra; Kjellman, Sofia E. (Springer Science and Business Media LLC, 2019-05-01)
    Sediment cores from Kløverbladvatna, a threshold lake in Wahlenbergfjorden, Nordaustlandet, Svalbard were used to reconstruct Holocene glacier fluctuations. Meltwater from Etonbreen spills over a threshold to the lake, only when the glacier is significantly ...
  • Björnsson, Helgi; Pálsson, Finnur (Cambridge University Press (CUP), 2020-03-11)
    Since the mid-1970s radio-echo soundings have been conducted on Iceland's temperate glaciers. Since then, low-frequency radar technology has furthered the study of most of the island's ice caps. Their masses and volumes have been quantified and detailed ...
  • Schmidt, Louise Steffensen (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2019)
    This dissertation describes the research results from applying regional climate models (RCMs) to simulate the near-past and future evolution of Vatnajökull, the largest ice cap in Iceland, and investigate the sensitivity of ablation to albedo and spring ...
  • Gopalan, Giridhar Raja (University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2019-08)
    The purpose of this thesis is to develop spatio-temporal statistical models for glaciology, using the Bayesian hierarchical framework. Specifically, the process level is modeled as a time series of computer simulator outputs (i.e., from a numerical ...
  • Eythorsson, Darri; Gardarsson, Sigurdur; Gunnarsson, Andri; Hrafnkelsson, Birgir (Cambridge University Press (CUP), 2018-03-19)
    Forecasting of glacier mass balance is important for optimal management of hydrological resources, especially where glacial meltwater constitutes a significant portion of stream flow, as is the case for many rivers in Iceland. In this study, a method ...