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Browsing by Author "Magnússon, Eyjólfur"

Browsing by Author "Magnússon, Eyjólfur"

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    The geodetic mass balance of Eyjafjallajökull ice cap for 1945–2014: processing guidelines and relation to climate 
    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, ...
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    Geodetic mass balance record with rigorous uncertainty estimates deduced from aerial photographs and lidar data – Case study from Drangajökull ice cap, NW Iceland 
    Magnússon, Eyjólfur; Belart, Joaquín M. C.; Pálsson, Finnur; Ágústsson, H.; Crochet, P. (Copernicus GmbH, 2016-01-19)
    In this paper we describe how recent high-resolution digital elevation models (DEMs) can be used to extract glacier surface DEMs from old aerial photographs and to evaluate the uncertainty of the mass balance record derived from the DEMs. We present a ...
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    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 ...
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    Hekla Volcano, Iceland, in the 20th Century: Lava Volumes, Production Rates, and Effusion Rates 
    Pedersen, Gro; Belart, Joaquín M. C.; Magnússon, Eyjólfur; Vilmundardóttir, Olga Kolbrún; Kizel, Fadi; Sigurmundsson, Friðþór Sófus; Gísladóttir, Guðrún; Benediktsson, Jon Atli (American Geophysical Union (AGU), 2018-02-22)
    Lava flow thicknesses, volumes, and effusion rates provide essential information for understanding the behavior of eruptions and their associated deformation signals. Preeruption and posteruption elevation models were generated from historical stereo ...
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    Lava field evolution and emplacement dynamics of the 2014–2015 basaltic fissure eruption at Holuhraun, Iceland 
    Pedersen, Gro; Höskuldsson, Ármann; Dürig, Tobias; Thordarson, Thorvaldur; Jonsdottir, Ingibjorg; Riishus, M. S.; Óskarsson, B.V.; Dumont, Stéphanie; Magnússon, Eyjólfur; Gudmundsson, Magnus Tumi; Sigmundsson, Freysteinn; Drouin, V.J.P.B.; Gallagher, C.; Askew, R.; Gudnason, J.; Moreland, William; Nikkola, P.; Reynolds, Hannah Iona; Schmith, Johanne (Elsevier BV, 2017-06)
    The 6-month long eruption at Holuhraun (August 2014–February 2015) in the Bárðarbunga-Veiðivötn volcanic system was the largest effusive eruption in Iceland since the 1783–1784 CE Laki eruption. The lava flow field covered ~84 km2 and has an estimated ...
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    Mass Balance of 14 Icelandic Glaciers, 1945–2017: Spatial Variations and Links With Climate 
    Belart, Joaquín M. C.; Magnússon, Eyjólfur; Berthier, Etienne; Gunnlaugsson, Ágúst Þ.; Pálsson, Finnur; Adalgeirsdottir, Gudfinna; Jóhannesson, Tómas; Þorsteinsson, Þorsteinn; Björnsson, Helgi (Frontiers Media SA, 2020-06-03)
    To date, most mass balance studies in Iceland have concentrated on the three largest ice caps. This study turns the focus toward smaller Icelandic glaciers, presenting geodetic mass-balance estimates for 14 of them (total area 1,005 km2 in 2017) from ...
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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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    Winter mass balance of Drangajökull ice cap (NW Iceland) derived from satellite sub-meter stereo images 
    Belart, Joaquín M. C.; Berthier, Etienne; Magnússon, Eyjólfur; Anderson, Leif S.; Pálsson, Finnur; Þorsteinsson, Þorsteinn; Howat, Ian M.; Adalgeirsdottir, Gudfinna; Jóhannesson, Tómas; Jarosch, Alexander H. (Copernicus GmbH, 2017-06-30)
    Sub-meter resolution, stereoscopic satellite images allow for the generation of accurate and high-resolution digital elevation models (DEMs) over glaciers and ice caps. Here, repeated stereo images of Drangajökull ice cap (NW Iceland) from Pléiades and ...