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Fletta eftir efnisorði "Jarðhiti"

Fletta eftir efnisorði "Jarðhiti"

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    "Eldhjarta Íslands": leitin að jarðfræðilegri uppsprettu landsins. 
    Bjarnason, Ingi Þorleifur (Hið íslenska náttúrufræðifélag, 1997)
    Heitur reitur er landsvæði sem einkennist af mikilli eldvirkni og jarðhita og stendur hátt yfir umhverfið. Ísland er einn af stærstu heitu reitum jarðar og gnæfir 2-4 km yfir venjulega hæð Norður-Atlantshafshryggjarins sem gengur í gegnum landið. Markmið ...
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    Abiogenesis not required to explain the origin of volcanic-hydrothermal hydrocarbons 
    Fiebig, J.; Stefansson, Andri; Ricci, A.; Tassi, F.; Viveiros, F.; Silva, S.; Lopez, T.M.; Schreiber, C.; Hofmann, S.; Mountain, B.W. (European Association of Geochemistry, 2019-07-29)
    Abiotic formation of n-alkane hydrocarbons has been postulated to occur within Earth's crust. Apparent evidence was primarily based on uncommon carbon and hydrogen isotope distribution patterns that set methane and its higher chain homologues apart ...
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    A cascade model and initial exploration of co-production processes underpinning the ecosystem services of geothermal areas 
    Cook, David; Davidsdottir, Brynhildur; Malinauskaite, Laura (Elsevier BV, 2020-12)
    This paper presents the first study in the academic literature to explore the various stages in the formation of geothermal ES and their interactions between the biosphere and anthroposphere. This is achieved through the development of the first ES ...
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    Corrosion testing of materials in simulated superheated geothermal environment 
    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 ...
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    Design of the subsurface observatory at Surtsey volcano, Iceland 
    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 ...
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    Enjoying the outdoor pool in a cold climate 
    Jónsson, Örn Daníel; Rastrick, Ólafur (Springer Nature, 2017-03-08)
    Background: The article explores the significance of abundant geothermal resources Icelanders enjoy, the comfort of inexpensively heated homes and easily accessible year-round public spaces where young and old can gather irrespective of social standing, ...
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    An environmental life cycle cost assessment of the costs of deep enhanced geothermal systems – The case studies of Reykjanes, Iceland and Vendenheim, France 
    Cook, David; Sigurjónsson, Hafþór Ægir; Davíðsdóttir, Brynhildur; Bogason, Sigurður G. (Elsevier BV, 2022-07)
    Environmental life cycle costing (ELCC) is a tool which aggregates five categories of monetary costs across a project's life cycle: investment, operation, maintenance, end-of-life, and externalities. This paper summarises the results from the first two ...
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    Geothermal ecosystems as natural climate change experiments: The ForHot research site in Iceland as a case study 
    Sigurdsson, Bjarni D.; Leblans, Niki; Dauwe, Steven; Guðmundsdóttir, Elín; Gundersen, Per; G. Gunnarsdóttir, Gunnhildur Eva; Holmstrup, Martin; Ilieva-Makulec, Krassimira; Kätterer, Thomas; Marteinsdóttir, Bryndís; Maljanen, Marja; Oddsdóttir, Edda Sigurdís; Ostonen, Ivika; Penuelas, Josep; Poeplau, Christopher; Richter, Andreas; Sigurðsson, Páll; van Bodegom, Peter; Wallander, Håkan; Weedon, James; Janssens, Ivan (Agricultural University of Iceland, 2016)
    This article describes how natural geothermal soil temperature gradients in Iceland have been used to study terrestrial ecosystem responses to soil warming. The experimental approach was evaluated at three study sites in southern Iceland; one grassland ...
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    High-Temperature Geothermal Utilization in the Context of European Energy Policy—Implications and Limitations 
    Karlsdóttir, Marta Rós; Heinonen, Jukka; Pálsson, Halldór; Pálsson, Ólafur Pétur (MDPI AG, 2020-06-19)
    The European Union (EU) has made climate change mitigation a high priority though a policy framework called "Clean Energy for all Europeans ". The concept of primary energy for energy resources plays a critical role in how different energy technologies ...
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    Impact of fluid-rock interaction on water uptake of the Icelandic crust: Implications for the hydration of the oceanic crust and the subducted water flux 
    Kleine, Barbara Irene; Stefansson, Andri; Halldorsson, Saemundur; Barnes, J.D. (Elsevier BV, 2020)
    Oceanic crust is a major transport medium of water into the mantle wedge and the convecting mantle. Yet, the water content of the oceanic crust remains uncertain. Active geothermal systems situated at on-land spreading centers provide a unique opportunity ...
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    The need for integrated valuation tools to support decision-making – The case of cultural ecosystem services sourced from geothermal areas 
    Cook, David; Fazeli, Reza; Davidsdottir, Brynhildur (Elsevier BV, 2019-06)
    Developing geothermal power projects may lead to trade-offs, whereby the economic and social benefits of the venture are difficult to compare with its cultural consequences, which include impacts to ES such as aesthetics, spiritual enrichment and ...
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    Non-surface mass balance of glaciers in Iceland 
    Jóhannesson, Tómas; Pálmason, Bolli; Hjartarson, Árni; Jarosch, Alexander H.; Magnússon, Eyjólfur; Belart, Joaquín M. C.; Gudmundsson, Magnus Tumi (Cambridge University Press (CUP), 2020-06-02)
    Non-surface mass balance is non-negligible for glaciers in Iceland. Several Icelandic glaciers are in the neo-volcanic zone where a combination of geothermal activity, volcanic eruptions and geothermal heat flux much higher than the global average lead ...
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    Reply 
    Bjarnason, Ingi Þorleifur; Menke, William; Flóvenz, Ólafur G. (American Geophysical Union, 1994-09-10)
    The central question discussed by Gudmundsson [this issue] can be succinctly stated: "Is the temperature of the shallowest upper mantle of Iceland at the peridotite solidus" (nominally, 1200°C). The traditional view, as developed by numerous authors ...
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    The role of smectites in the electrical conductivity of active hydrothermal systems: electrical properties of core samples from Krafla volcano, Iceland 
    Lévy, L; Gibert, B; Sigmundsson, Freysteinn; Flóvenz, Ólafur G.; Hersir, Gylfi; Briole, P; Pezard, PA (Oxford University Press (OUP), 2018-08-18)
    The underground circulation of hot water, of interest for geothermal energy production, is often indirectly inferred from the presence of minerals formed by hydrothermal alteration at different temperatures. Clay minerals, such as smectite and chlorite, ...
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    Silicon and oxygen isotopes unravel quartz formation processes in the Icelandic crust 
    Kleine, Barbara Irene; Stefansson, Andri; Halldórsson, Sæmundur Ari; Whitehouse, M.J.; Jónasson, Kristján (European Association of Geochemistry, 2018-04)
    Quartz formation processes in the Icelandic crust were assessed using coupled δ18O and δ30Si systematics of silica deposits formed over a wide temperature range (<150 to >550 °C). Magmatic quartz reveals δ18O (-5.6 to +6.6 ‰) and δ30Si (-0.4 ± 0.2 ‰) ...
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    SUSTAIN drilling at Surtsey volcano, Iceland, tracks hydrothermal and microbiological interactions in basalt 50 years after eruption 
    Jackson, Marie D.; Gudmundsson, Magnus Tumi; Weisenberger, Tobias B.; Rhodes, J. Michael; Stefansson, Andri; Kleine, Barbara Irene; Lippert, Peter C.; Marquardt, Joshua M.; Reynolds, Hannah Iona; Kück, Jochem; Marteinsson, Viggó; Vannier, Pauline; Bach, Wolfgang; Barich, Amel; Bergsten, Pauline; Bryce, Julia G.; Cappelletti, Piergiulio; Couper, Samantha; Fahnestock, M. Florencia; Gorny, Carolyn F.; Grimaldi, Carla; Groh, Marco; Guðmundsson, Ágúst; Gunnlaugsson, Ágúst T.; Hamlin, Cédric; Högnadóttir, Thórdís; Jónasson, Kristján; Jónsson, Sigurður S.; Jørgensen, Steffen L.; Klonowski, Alexandra M.; Marshall, Beau; Massey, Erica; McPhie, Jocelyn; Moore, James G.; Olafsson, Einar Sindri; Onstad, Solveig L.; Perez, Velveth; Prause, Simon; Snorrason, Snorri P.; Türke, Andreas; White, James D. L.; Zimanowski, Bernd (Copernicus GmbH, 2019-06-12)
    The 2017 Surtsey Underwater volcanic System for Thermophiles, Alteration processes and INnovative concretes (SUSTAIN) drilling project at Surtsey volcano, sponsored in part by the International Continental Scientific Drilling Program (ICDP), provides ...