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Browsing by Department "Institute of Earth Sciences (UI)"

Browsing by Department "Institute of Earth Sciences (UI)"

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  • Thorhallsson, Andri Isak; Stefansson, Andri; Kovalov, Danyil; Karlsdóttir, Sigrún (Elsevier BV, 2020-05)
    This paper reports the results of corrosion study for carbon steel, austenitic stainless steel, as well as titanium and nickel-based alloys which were tested in a simulated superheated geothermal environment (SSGE) in flow-through reactors to investigate ...
  • Caricchi, Luca; Petrelli, Maurizio; Bali, Eniko; Sheldrake, Tom; Pioli, Laura; Simpson, Guy (Frontiers Media SA, 2020-02-07)
    The Holuhraun–Bárdarbunga (Iceland) eruption lasted approximately 6 months. Magma propagated laterally through a 40 km long dyke, while Bárdarbunga caldera was collapsing. This event was intensely monitored, providing an opportunity to investigate the ...
  • Dürig, Tobias; White, J. D. L.; Murch, A. P.; Zimanowski, B.; Büttner, R.; Mele, D.; Dellino, P.; Carey, R. J.; Schmidt, L. S.; Spitznagel, N. (Springer Science and Business Media LLC, 2020-06-29)
    The majority of Earth’s volcanic eruptions occur beneath the sea, but the limited number of direct observations and samples limits our understanding of these unseen events. Subaerial eruptions lend some insight, but direct extrapolation from the subaerial ...
  • Dürig, Tobias; White, J. D. L.; Zimanowski, B.; Büttner, R.; Murch, A.; Carey, R. J. (Springer Science and Business Media LLC, 2020-09-30)
    In 2012, the eruption of deep-sea volcano Havre produced an abundance of fine ash at a depth of ~ 1000 m below sea level. In this study the 2D shapes of Havre ash grains retrieved from the seafloor were compared quantitatively with those of particles ...
  • Türke, Andreas; Jackson, Marie D.; Bach, Wolfgang; Kahl, Wolf-Achim; Grzybowski, Brian; Marshall, Beau; Gudmundsson, Magnus Tumi; Jørgensen, Steffen Leth (Copernicus GmbH, 2019-06-12)
    Surtsey, the youngest of the islands of Vestmannaeyjar, is an oceanic volcano created by explosive basaltic eruptions during 1963-1967 off the southern coast of Iceland. The subsurface deposits of the volcano were first sampled by a cored borehole in ...
  • Tonnard, Manon; Planquette, Hélène; Bowie, Andrew R.; van der Merwe, Pier; Gallinari, Morgane; Desprez de Gésincourt, Floriane; Germain, Yoan; Gourain, Arthur; Benetti, Marion; Reverdin, Gilles; Tréguer, Paul; Boutorh, Julia; Cheize, Marie; Lacan, François; Menzel Barraqueta, Jan-Lukas; Pereira-Contreira, Leonardo; Shelley, Rachel; Lherminier, Pascale; Sarthou, Géraldine (Copernicus GmbH, 2020-02-21)
    Dissolved Fe (DFe) samples from the GEOVIDE voyage (GEOTRACES GA01, May-June 2014) in the North Atlantic Ocean were analyzed using a seaFAST-pico™ coupled to an Element XR sector field inductively coupled plasma mass spectrometer (SF-ICP-MS) and provided ...
  • Alkalaj, Jovana; Hrafnsdottir, Thora; Ingimarsson, Finnur; Smith, Robin J; Kreiling, Agnes-Katharina; Mischke, Steffen (Oxford University Press (OUP), 2019-04-25)
    Ostracods in Icelandic freshwaters have seldom been researched, with the most comprehensive record from the 1930s. There is a need to update our knowledge of the distribution of ostracods in Iceland as they are an important link in these ecosystems as ...
  • Mankasingh, Utra; Gísladóttir, Guðrún (Elsevier BV, 2019-03-01)
    Andisols are carbon-rich soils that persist in volcanic regions with cool climates. They are the main soil type in Iceland, where there are also large areas of premature or degraded mineral soils with the possible potential to become andisols. This ...
  • Nielsen, Lisbeth T.; Adalgeirsdottir, Gudfinna; Gkinis, Vasileios; Nuterman, Roman; Hvidberg, Christine S. (Cambridge University Press (CUP), 2018-05-22)
    The Holocene climatic optimum was a period 8–5 kyr ago when annual mean surface temperatures in Greenland were 2–3°C warmer than present-day values. However, this warming left little imprint on commonly used temperature proxies often used to derive the ...
  • Juncu, Daniel; Arnadottir, Thora; Geirsson, Halldor; Gunnarsson, Gunnar Th (Oxford University Press (OUP), 2019-01-09)
    The characterization of magnetic minerals in rocks often uses methods that measure induced magnetization. When rocks, sediments or soils contain two magnetic phases, in which one has a high saturation magnetization (MS), for example magnetite, and the ...
  • Gíslason, Sigurður Reynir; Stefansdottir, Gerdur; Pfeffer, Melissa; Barsotti, Sara; Jóhannsson, Th.; Galeczka, Iwona Monika; Bali, Eniko; Sigmarsson, Olgeir; Stefansson, Andri; Keller, Nicole Simone; Sigurðsson, Á.; Bergsson, Bergur H.; Galle, B.; Jacobo, V.C; Arellano, S.; Aiuppa, A.; Jónasdóttir, Elín Björk; Eiríksdóttir, E.S.; Jakobsson, Sigurður; Guðfinnsson, Guðmundur; Halldórsson, Sæmundur Ari; Gunnarsson, H.; Haddadi, B.; Jonsdottir, Ingibjorg; Thordarson, Thorvaldur; Riishuus, Morten; Högnadóttir, Thórdís; Dürig, Tobias; Pedersen, Gro; Höskuldsson, Ármann; Gudmundsson, Magnus Tumi (European Association of Geochemistry, 2015)
    The effusive six months long 2014-2015 Bárðarbunga eruption (31 August-27 February) was the largest in Iceland for more than 200 years, producing 1.6 ± 0.3 km3 of lava. The total SO2 emission was 11 ± 5 Mt, more than the amount emitted from Europe ...
  • Gascoin, Simon; Guðmundsson, Sverrir; Adalgeirsdottir, Gudfinna; Pálsson, Finnur; Schmidt, Louise; Berthier, Etienne; Björnsson, Helgi (MDPI AG, 2017-04-25)
    Albedo is a key variable in the response of glaciers to climate. In Iceland, large albedo variations of the ice caps may be caused by the deposition of volcanic ash (tephra). Sparse in situ measurements are insufficient to characterize the spatial ...
  • Clark, Deirdre; Galeczka, Iwona M.; Dideriksen, Knud; Voigt, Martin J.; Wolff-Boenisch, Domenik; Gíslason, Sigurður Reynir (Elsevier BV, 2019-10)
    Mineralization of water dissolved carbon dioxide injected into basaltic rocks occurs within two years in field-scale settings. Here we present the results from a CO2-water-basaltic glass laboratory experiment conducted at 50 °C and 80 bar pressure in ...
  • 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 ...
  • Nikkola, Paavo; Thordarson, Thorvaldur; Rämö, O. Tapani; Heikkilä, Pasi (Springer Science and Business Media LLC, 2019-11-25)
    To gain insights into crystal–melt separation processes during basalt differentiation, we have studied an 8-m-thick pāhoehoe lava lobe from the Hafnarhraun lava flow field in SW Iceland. The lobe has abundant melt segregations, porous cylindrical and ...
  • Benetti, Marion; Lacour, Jean-Lionel; Sveinbjörnsdóttir, Árný; Aloisi, G.; Reverdin, G.; Risi, C.; Peters, A. J.; Steen‐Larsen, H. C. (American Geophysical Union (AGU), 2018-03-10)
    We propose a framework using water vapor isotopes to study mixing processes in the marine boundary layer (MBL) during quiescent conditions, where we expect evaporation to contribute to the moisture budget. This framework complements the existing models, ...
  • Benetti, Marion; Reverdin, Gilles; Holliday, Penny; Olafsdottir, Solveig; Lherminier, Pascale; Sarthou, Geraldine; De Steu, Laura; Sveinbjörnsdóttir, Árný; Valdes, Sinhue Torres; Tynan, Eithne; Yashayaev, Igor; Olafsson, Jon (European Geosciences Union, 2017)
    We investigate whether one can detect changes in the freshwater contributions to the North Atlantic subpolar gyre(SPG), in light of the observed recent decrease of salinity in the region. We focus on two important conduits offreshwater from the ...
  • Nedelciu, Claudiu; Ragnarsdottir, Kristin Vala; Stjernquist, Ingrid (Springer Science and Business Media LLC, 2018-09-14)
    Recycling Phosphorus (P) from urban wastewater can secure part of domestic agricultural P supply and contribute to a circular P supply chain. In this paper, we use literature review, stakeholder interviews and analysis, and systems dynamics for the ...
  • Mackay, Jonathan D.; Barrand, Nicholas E.; Hannah, David M.; Krause, Stefan; Jackson, Christopher R.; Everest, Jez; Adalgeirsdottir, Gudfinna; Black, Andrew R. (Copernicus GmbH, 2019-04-03)
    The flow regimes of glacier-fed rivers are sensitive to climate change due to strong climate cryosphere hydrosphere interactions. Previous modelling studies have projected changes in annual and seasonal flow magnitude but neglect other changes in river ...
  • Belart, Joaquín M. C.; Magnússon, Eyjólfur; Berthier, Etienne; Pálsson, Finnur; Adalgeirsdottir, Gudfinna; Jóhannesson, Tómas (Cambridge University Press (CUP), 2019-04-11)
    Mass-balance measurements of Icelandic glaciers are sparse through the 20th century. However, the large archive of stereo images available allows estimates of glacier-wide mass balance in decadal time steps since 1945. Combined with climate records, ...