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Browsing by Subject "Jarðhiti"

Browsing by Subject "Jarðhiti"

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  • 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 ...
  • Santanicchia, Massimo (IIT Bombay Publications, 2015-12)
    In the aftermath of the financial crisis that invested Iceland starting in September 2008 the town of Hveragerði decided to launch at the end of 2008 a national competition to gather ideas on how a more sustainable future could be designed and implemented ...
  • Maljanen, Marja; Bhattarai, Hem Raj; Biasi, Christina; Sigurdsson, Bjarni D. (Agricultural University of Iceland, 2018)
    Geothermal areas can be local sources of greenhouse gases, both directly from the geothermal system or because of soil warming effects on biological sources. In this study we repeated field measurements methane (CH4) and nitrous oxide (N2O) fluxes along ...
  • Lévy, Léa (Paris Sciences et Lettres, Laboratoire de Géologie de l'Ecole Normale Supérieure and University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2019-04)
    The electrical signature of volcanoes is affected by several characteristics of rocks: volume and salinity of pore fluid, abundance of conductive minerals, rock temperature and presence of molten crust (magma). Electromagnetic soundings are widely used ...
  • 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, ...
  • Holmstrup, Martin; Ehlers, Bodil; Slotsbo, Stine; Ilieva-Makulec, Krassimira; Sigurdsson, Bjarni D.; Leblans, Niki; Ellers, Jacintha; Berg, Matty P. (Wiley, 2018-02-28)
    1. Human activities have caused global changes of atmospheric chemistry resulting in increased temperature especially in the colder regions of the northern hemisphere. Since warming of the environment can have drastic effects on terrestrial ecosys-tems ...
  • Kristbjornsdottir, Adalbjorg (University of Iceland, School of Health Sciences, Faculty of Medicine, 2016-12)
    Background and aims: Previous studies in geothermal and volcanic areas have shown high risk of certain types of cancers. The aim was to study the association between residence in geothermal areas and the incidence and mortality of cancer in ...
  • 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 ...
  • Marañón Jiménez, Sara; Soong, Jennifer; Leblans, Niki; Sigurdsson, Bjarni D.; Penuelas, Josep; Richter, Andreas; Asensio, Dolores; Fransén, Erik A.; Janssens, Ivan (Springer Nature, 2018-04-17)
    Increasing temperatures can accelerate soil organic matter decomposition and release large amounts of CO2 to the atmosphere, potentially inducing positive warming feedbacks. Alterations to the temperature sensitivity and physiological functioning of ...
  • 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 ...
  • Radujković, Dajana; Verbruggen, Erik; Sigurdsson, Bjarni D.; Leblans, Niki; Janssens, Ivan; Vicca, Sara; Weedon, James (Oxford University Press (OUP), 2017-12-08)
    Global change is expected to affect soil microbial communities through their responsiveness to temperature. It has been proposed that prolonged exposure to elevated temperatures may lead to progressively larger effects on soil microbial community ...
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    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 ...
  • 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, ...
  • Kleine, Barbara Irene; Stefánsson, 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 ‰) ...
  • Reynolds, Hannah Iona (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2017-12-18)
    Thermal anomalies are observed at many volcanoes, resulting from geothermal and magmatic activity, and are usually difficult to quantify since the measurement of heat fluxes from the ground to the atmosphere is subject to large uncertainties. However, ...
  • Birgisdóttir, Sigrún (IIT Bombay Publications, 2015-12)
    This paper will address issues of sustainable development within the context of Icelands´ escalating tourism, exploring how design thinking and scenario building can be used as a reflective tool to address complex problems. This will be discussed in ...