Opin vísindi

Browsing by Department "Jarðvísindadeild (HÍ)"

Browsing by Department "Jarðvísindadeild (HÍ)"

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  • Aufaristama, Muhammad; Höskuldsson, Ármann; Ulfarsson, Magnus; Jónsdóttir, Ingibjörg; Thordarson, Thorvaldur (MDPI AG, 2020-03-31)
    Roughness can be used to characterize the morphologies of a lava flow. It can be used to identify lava flow features, provide insight into eruption conditions, and link roughness pattern across a lava flow to emplacement conditions. In this study, we ...
  • Guðnason, Jónas (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2017-07-12)
    Iceland is one of the most volcanically active terrestrial regions on Earth. Hazards posed from volcanic eruptions to local population and life stock is well known in Iceland and the wider effects from volcanic activity have been elevated in recent ...
  • Pankhurst, Matthew J.; Morgan, Daniel J.; Thordarson, Thorvaldur; Loughlin, Sue C. (Elsevier BV, 2018-07)
    How a volcano has behaved throughout its past is a guide to its future behaviour. Detailed knowledge of what preceded eruptions from specific volcanoes, and how this can be recognised in real-time, are pivotal questions of this field. Here, the physical ...
  • Belart, Joaquín M. C. (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2018-11-29)
    The mass balance of a glacier is strongly connected to climate. At high latitudes, mass balance is typically controlled by snow accumulation during the winter and the glacier ablation during the summer. In Iceland, direct mass balance observations ...
  • Lewandowski, M.; Kusiak, M.A.; Michalczyk, Ł.; Szmigiel, D.; Sledziewska-Gojska, E.; Barzycka, B.; Wawrzyniak, T.; Luks, B.; Thordarson, Thorvaldur; Wilde, S.A.; Höskuldsson, Ármann (Elsevier BV, 2017-12)
    In the 60th year after the placing of the corner stone under the Polish Polar Station at Hornsund (PPSH; Spitsbergen, Svalbard, Norway), a new capsule has been laid down in the vicinity of the PPSH. It is made of stainless steel, and includes five ...
  • Webert, Kyle C.; Herren, Cristina M.; Einarsson, Árni; Bartrons, Mireia; Hauptfleisch, Ulf; Ives, Anthony R. (Wiley-Blackwell, 2017-02)
    The importance of environmental disturbances as drivers of ecological communities depends not only on the magnitude of the disturbance, but also on the disturbance-specific sensitivity of the community. Organisms that alter the physical structure of ...
  • Zielhofer, Christoph; von Suchodoletz, Hans; Fletcher, William J.; Schneider, Birgit; Dietze, Elisabeth; Schlegel, Michael; Schepanski, Kerstin; Weninger, Bernhard; Mischke, Steffen; Mikdad, Abdeslam (Elsevier BV, 2017-09)
    The Sahara is the world's largest dust source with significant impacts on trans-Atlantic terrestrial and large-scale marine ecosystems. Contested views about a gradual or abrupt onset of Saharan aridity at the end of the African Humid Period dominate ...
  • Snæbjörnsdóttir, Sandra Ósk (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2017-04-19)
    In-situ carbonation of basaltic rocks could provide a carbon storage solution for the long term. Permanence is essential for the success and public acceptance of carbon storage. The aim of this study was twofold, to evaluate and make a first estimate ...
  • Clark, Deirdre (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2019-10-23)
    The reduction of carbon dioxide (CO2) emissions in the atmosphere is currently one of the main challenges facing humanity. One solution is carbon capture from concentrated sources and directly from the atmosphere, and long term storage in rocks. Basaltic ...
  • Neely, Rebecca Anna (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2017)
    Molybdenum isotopes are used to quantify changes in Earth’s paleoredox conditions but their application relies upon a simplified model in which rivers dominate the ocean input with minor contributions from hydrothermal fluids. The effect of groundwater ...
  • Aufaristama, Muhammad; Höskuldsson, Ármann; Jónsdóttir, Ingibjörg; Ulfarsson, Magnus; Thordarson, Thorvaldur (MDPI AG, 2018-01-20)
    A new lava field was formed at Holuhraun in the Icelandic Highlands, north of Vatnajökull glacier, in 2014–2015. It was the largest effusive eruption in Iceland for 230 years, with an estimated lava bulk volume of ~1.44 km3 covering an area of ~84 km2. ...
  • 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 ...
  • Geirsdóttir, Áslaug; Miller, G H; Andrews, John Thomas; Harning, David; Anderson, Leif S.; Florian, Christopher; Larsen, Darren; Thordarson, Thorvaldur (Copernicus GmbH, 2019-01-08)
    Strong similarities in Holocene climate reconstructions derived from multiple proxies (BSi, TOC – total organic carbon, δ13C, C∕N, MS – magnetic susceptibility, δ15N) preserved in sediments from both glacial and non-glacial lakes across Iceland indicate ...
  • Sigfúsdóttir, Thorbjörg (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2019-11)
    Large and complete sections through glacial landforms formed in subaqueous environments are rare, impeding our knowledge of their internal composition and the processes responsible for their formation. Following the last deglaciation of the Icelandic ...
  • Schomacker, Anders; Farnsworth, Wesley R.; 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 ...
  • Brader, Martin D.; Lloyd, Jeremy M.; Barlow, Natasha L.M.; Norddahl, Hreggvidur; Bentley, Michael J.; Newton, Anthony J. (Elsevier BV, 2017-08)
    Relative sea-level (RSL) data provide constraints on land uplift associated with former ice loading and can be used to differentiate between contrasting ice unloading scenarios. Isolation basin, coastal lowland and geomorphological evidence is employed ...
  • Harning, David (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2019-04)
    Iceland’s position at the confluence of major oceanic and atmospheric fronts results in a highly sensitive climate evident in both instrumental and paleo records. However, open questions still remain regarding the pre-instrumental evolution of climate, ...
  • Lichoro, Charles Muturia (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2019-12-13)
    An extensive geophysical survey comprising over 400 MT and 515 gravity stations on the Korosi, Paka and Silali volcanoes in the northern Kenya rift was conducted in order to assess the occurrence of geothermal resources in the context of the geophysics ...
  • Hamilton, Christopher W.; Fitch, Erin P.; Fagents, Sarah A.; Thordarson, Thorvaldur (Springer Nature, 2017-01)
    Volcanic rootless cones are the products of thermohydraulic explosions involving rapid heat transfer from active lava (fuel) to external sources of water (coolant). Rootless eruptions are attributed to molten fuel–coolant interactions (MFCIs), but ...
  • Schmidt, Anja; Leadbetter, Susan; Theys, Nicolas; Carboni, Elisa; Witham, Claire S.; Stevenson, John A.; Birch, Cathryn E.; Thordarson, Thorvaldur; Turnock, Steven; Barsotti, Sara; Delaney, Lin; Feng, Wuhu; Grainger, Roy G.; Hort, Matthew C.; Höskuldsson, Ármann; Ialongo, Iolanda; Ilyinskaya, Evgenia; Jóhannsson, Þorsteinn; Kenny, Patrick; Mather, Tamsin A.; Richards, Nigel A. D.; Shepherd, Janet (Wiley-Blackwell, 2015-09-23)
    The 2014–2015 Bárðarbunga-Veiðivötn fissure eruption at Holuhraun produced about 1.5 km3 of lava, making it the largest eruption in Iceland in more than 200 years. Over the course of the eruption, daily volcanic sulfur dioxide (SO2) emissions exceeded ...