Opin vísindi

Fletta eftir höfundi "Sigmarsson, Olgeir"

Fletta eftir höfundi "Sigmarsson, Olgeir"

Röðun: Raða: Niðurstöður:

  • Icon
    Environmental pressure from the 2014–15 eruption of Bárðarbunga volcano, Iceland 
    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 ...
  • Icon
    Gradual caldera collapse at Bárdarbunga volcano, Iceland, regulated by lateral magma outflow 
    Gudmundsson, Magnus Tumi; Jónsdóttir, Kristín; Hooper, Andrew; Holohan, Eoghan P.; Halldorsson, Saemundur; Ofeigsson, Benedikt Gunnar; Cesca, Simone; Vogfjörð, Kristín S.; Sigmundsson, Freysteinn; Högnadóttir, Thórdís; Einarsson, Páll; Sigmarsson, Olgeir; Jarosch, Alexander H.; Jónasson, Kristján; Magnússon, Eyjólfur; Hreinsdóttir, Sigrún; Bagnardi, Marco; Parks, Michelle M.; Hjorleifsdottir, Vala; Pálsson, Finnur; Walter, Thomas R.; Schöpfer, Martin P. J.; Heimann, Sebastian; Reynolds, Hannah Iona; Dumont, Stéphanie; Bali, Eniko; Guðfinnsson, Guðmundur; Dahm, Torsten; Roberts, Matthew J.; Hensch, Martin; Belart, Joaquín M. C.; Spaans, Karsten; Jakobsson, Sigurður; Guðmundsson, Gunnar B.; Fridriksdóttir, Hildur María; Drouin, Vincent; Dürig, Tobias; Adalgeirsdottir, Gudfinna; Riishuus, Morten; Pedersen, Gro; van Boeckel, Tayo; Oddsson, Björn; Pfeffer, Melissa A.; Barsotti, Sara; Bergsson, Baldur; Donovan, Amy; Burton, Mike R.; Aiuppa, Alessandro (American Association for the Advancement of Science (AAAS), 2016-07-14)
    Large volcanic eruptions on Earth commonly occur with a collapse of the roof of a crustal magma reservoir, forming a caldera. Only a few such collapses occur per century, and the lack of detailed observations has obscured insight into the mechanical ...
  • Icon
    Long or short silicic magma residence time beneath Hekla volcano, Iceland? 
    Sigmarsson, Olgeir; Bergþórsdóttir, Ingibjörg A.; Devidal, Jean-Luc; Larsen, Guðrún; Gannoun, Abdelmouhcine (Springer Nature, 2022-01-07)
    Timescales of magma transfer and differentiation processes can be estimated when the magma differentiation mechanism is known. When conventional major and trace element analyses fail to distinguish between various processes of magma differentiation, ...
  • Icon
    Rapid differentiation of mafic to intermediate magma constrained by Ra–Th disequilibrium and the size of magma chamber beneath Hekla volcano, Iceland 
    Sigmarsson, Olgeir; Larsen, Guðrún; Hervé, Garance (Springer, 2024-06)
    The size of deep-seated magma chambers is an important parameter for understanding pre-eruptive signals such as surface deformation. The constantly inflating Hekla volcano in Iceland has had relatively simple eruptive behaviour during the historical ...
  • Icon
    Reply to comment on “Long or short silicic magma residence time beneath Hekla volcano, Iceland?” 
    Sigmarsson, Olgeir (Springer, 2023-10)
    We would like to thank Geist et al. (2023) for the opportunity to further discuss the arguments presented in our paper “Long or short silicic magma residence time beneath Hekla volcano, Iceland?” (Sigmarsson et al. 2022). The disagreement centres around ...