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Fletta eftir efnisorði "Eldvirkni"

Fletta eftir efnisorði "Eldvirkni"

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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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    A complete Holocene lake sediment ancient DNA record reveals long-standing high Arctic plant diversity hotspot in northern Svalbard 
    Voldstad, Linn H.; Alsos, Inger G.; Farnsworth, Wesley; Heintzman, Peter D.; Håkansson, Lena; Kjellman, Sofia E.; Rouillard, Alexandra; Schomacker, Anders; Eidesen, Pernille B. (Elsevier BV, 2020-04-15)
    Arctic hotspots, local areas of high biodiversity, are potential key sites for conservation of Arctic biodiversity. However, there is a need for improved understanding of their long-term resilience. The Arctic hotspot of Ringhorndalen has the highest ...
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    Hot mantle transition zone beneath Iceland and the adjacent Mid-Atlantic Ridge inferred from P-to-S conversions at the 410- and 660-km discontinuities 
    Shen, Yang; Solomon, Sean C.; Bjarnason, Ingi Þorleifur; Purdy, G. M. (American Geophysical Union (AGU), 1996-12-01)
    P‐to‐S conversions from the two primary discontinuities near 410 and 660 km depth (P410s and P660s phases) are evident in particle motions and receiver functions of teleseismic body waves recorded by broadband seismic stations in Iceland. The average ...
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    An Iceland hotspot saga 
    Bjarnason, Ingi Þorleifur (Iceland Glaciological Society and Geoscience Society of IcelandJöklarannsóknafélags Íslands og Jarðfræðafélags Íslands, 2008)
    Is Iceland a hotspot, with ridge-centered plume? In Iceland vigorous volcanism has built up a plateau 3.0 km higher than at a normal mid-ocean ridge with 3 to 4 times thicker crust than average oceanic crust. This volcanism can be associated with ...
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    The lithosphere and asthenosphere of the Iceland hotspot from surface waves 
    Bjarnason, Ingi Þorleifur; Schmeling, Harro (Oxford University Press (OUP), 2009-07)
    1-D models were calculated for the velocity of shear waves, polarized vertically (SV) and horizontally (SH) from dispersed Rayleigh and Love surface waves. These had been recorded in Iceland by the ICEMELT broad-band seismic network, with about half ...
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    Seismic ground vibrations give advanced early-warning of subglacial floods 
    Eibl, Eva; Bean, Christopher J.; Einarsson, Bergur; Pálsson, Finnur; Vogfjörd, Kristín S. (Springer Science and Business Media LLC, 2020-07-21)
    Glacier runoff and melt from volcanic and geothermal activity accumulates in glacier dammed lakes in glaciated areas around the world. These lakes eventually drain, creating hazardous subglacial floods that are usually only confirmed after they exit ...
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    Tomographic image of the Mid-Atlantic Plate Boundary in southwestern Iceland 
    Bjarnason, Ingi Þorleifur; Menke, William; Flóvenz, Ólafur G.; Caress, David (American Geophysical Union (AGU), 1993-04-10)
    The 170 km South Iceland Seismic Tomography (SIST) profile extends from the west and across the Mid‐Atlantic Ridge spreading center in the Western Volcanic Zone and continues obliquely through the transform zone (the South Iceland Seismic Zone) to the ...
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    Variance of the Flexure Model Predictions With Rejuvenated Volcanism at Kīlauea Point, Kaua‘i, Hawai‘i 
    Thordarson, Thorvaldur; Garcia, Michael O. (Frontiers Media SA, 2018-09-04)
    The origin of rejuvenated volcanism on mantle plume related oceanic islands remains controversial. One commonly cited model is decompressional melting related to plate flexure from the rapid loading of the lithosphere by the formation of a shield ...