Browsing Institutt for geofag by Title
Now showing items 565-584 of 3035
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(Doctoral thesis / Doktoravhandling, 2022)Seismic data contain information about elastic properties and the structural patterns of the subsurface. However, before we get an image of the subsurface, seismic data goes through many processing steps that consist of ...
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(Doctoral thesis / Doktoravhandling, 2022)During seismic acquisition, reflected waves from the subsurface are recorded by sensors in seismic cables in the water column. The measured data are used to create images of the subsurface for the exploration of natural ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)Energy efficiency is crucial to greenhouse gas (GHG) emission pathways reported by the Intergovernmental Panel on Climate Change. Electrical overload frequently occurs and causes unwanted outages in distribution networks, ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2024)Abstract Vesteris Seamount is a large Quaternary intraplate submarine volcano in the SW Greenland Sea, about 1,000 km NE of Iceland and 300 km NW of the Mohn's spreading ridge, whose mode of formation remains unsolved. We ...
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Deep versus shallow origin of gravity anomalies, topography and volcanism on Earth, Venus and Mars (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2010)The relation between gravity anomalies, topography and volcanism can yield important insights about the internal dynamics of planets. From the power spectra of gravity and topography on Earth, Venus and Mars we infer that ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)First‐order variations in sea level exhibit amplitudes of ∼200 m over periods that coincide with those of supercontinental cycles (∼300–500 Myr). Proposed mechanisms for this sea level change include processes that change ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)In contrast with the atmosphere, which is heated from below by solar radiation, the ocean is both heated and cooled from above. To drive a deep-reaching overturning circulation in this context, it is generally assumed that ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)The majority of Earth’s volcanic eruptions occur beneath the sea, but the limited number of direct observations and samples limits our understanding of these unseen events. Subaerial eruptions lend some insight, but direct ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)We held the MagellanPlus workshop SVALCLIME “Deep-time Arctic climate archives: high-resolution coring of Svalbard's sedimentary record”, from 18 to 21 October 2022 in Longyearbyen, to discuss scientific ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)The performance of hydrological models is affected by uncertainty related to observed climatological and discharge data. Although the latter has been widely investigated, the effects on hydrological models from different ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)Late Cretaceous‐Cenozoic contractional structures are widespread in the Barents Sea. While the exact dating of the deformation is unclear, it can only be inferred that the contraction is younger than the early Cretaceous. ...
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(Master thesis / Masteroppgave, 2023)Fen Carbonatite Complex was formed in different stages. The stage of søvite and dolomite carbonatite emplacement is believed to be accompanied by extensive deformation. However, the mechanism of carbonatite deformation is ...
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(Master thesis / Masteroppgave, 2015)
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Abstract Determining how fracture network development leads to macroscopic failure in heterogeneous materials may help estimate the timing of failure in rocks in the upper crust as well as in engineered structures. The ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)Forecasting the timing of catastrophic failure, such as crustal earthquakes, has been a central concern for centuries. Such forecasting requires identifying signals that evolve or accelerate in the precursory phase leading ...
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(Master thesis / Hovedoppgave, 2004)Fronten av fire tidevannsbreer utgjør kalvingsbukta innerst i Van Keulenfjorden, en 43 km lang nordvest-sydøst orientert fjord sydvest på Spitsbergen. Zawadskibreen, Nathorstbreen, Liestølbreen og Doktorbreen går sammen ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Mercury (Hg) enrichment and elevated ratios of Hg to total organic carbon (Hg/TOC) in sedimentary rocks have often been linked to volcanism from large igneous provinces (LIPs). Primary Hg and TOC contents of sediments can ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)Degradation of near-surface permafrost can pose a serious threat to the utilization of natural resources, and to the sustainable development of Arctic communities. Here we identify at unprecedentedly high spatial resolution ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)Halogenated very short-lived substances (VSLS) are naturally produced in the ocean and emitted to the atmosphere. When transported to the stratosphere, these compounds can have a significant influence on the ozone layer ...
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(Master thesis / Masteroppgave, 2007)In this study of the Central Spitsbergen Palaeogene, depositional environments and transgressive-regressive developments of the Frysjaodden and Hollendardalen formations have been reconstructed with combined evidence from ...