Browsing Institutt for geofag by Title
Now showing items 616-635 of 2329
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Although geological CO2 sequestration is an essential solution for reducing anthropogenic carbon dioxide from the atmosphere, the method needs critical evaluation of injection-induced mechanical risks for safe and reliable ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)Fractures are the main flow path in rocks with very low permeability, and their hydrodynamic properties might change due to interaction with the pore fluid or injected fluid. Existence of minerals with different reactivities ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)The effects of the coefficient of friction and porosity on impact cratering are not sufficiently considered in scaling laws that predict the crater size from a known impactor size, velocity, and mass. We carried out a ...
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(Master thesis / Masteroppgave, 2018)Dynamical runout models are essential tools in landslide hazard and risk assessment, because they allow us to simulate the motion of past landslides and to predict the motion of future landslides. Runout distances obtained ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)Accurate and reliable multi-step-ahead flood forecasting is beneficial for reservoir operation and water resources management. The Encoder-Decoder (ED) that can tackle sequence-to-sequence problems is suitable for ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)Mantle flow is a key feature that can affect melt production and composition in and around subduction zones. In this study, I use three-dimensional numerical models to investigate the role of mantle flow on subduction-related ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)Potential field data, reprocessed regional 2D seismic reflection profiles and 3D seismic tied to wells were used to study the late Devonian-Permian development of the Nordkapp Basin in Barents Sea. The composite basin can ...
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(Doctoral thesis / Doktoravhandling, 2015)Carbon capture and storage (CCS) in geological reservoirs – especially saline aquifers – is a key midterm solution to mitigate climate changes caused by increasing anthropogenic CO2. In order to ensure that a CCS project ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Abstract Earth's upper mantle rheology controls lithosphere‐asthenosphere coupling and thus surface tectonics. Rock deformation experiments and seismic anisotropy measurements indicate that composite rheology (co‐existing ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)Hydration of a nominally dry rock can cause expansion of the solid volume, resulting in reaction‐induced fracturing and an associated increase in the porosity and permeability of the rock. We study the effect of confinement ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)In characterizing subsurface reservoirs for CO2 storage, the geological heterogeneity distribution is of importance with respect to the injectivity and migration paths. The object of this study is a saline aquifer of ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)Abstract. In continuous permafrost lowlands, thawing of ice-rich deposits and melting of massive ground ice lead to abrupt landscape changes called thermokarst, which have widespread consequences on the thermal, hydrological, ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)Shrub expansion in high latitudes is a widely observed response to climate change. Extensive evidence has shown that shrub expansion can lead to positive feedbacks to the regional climate. In this study we evaluate the ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)Relationship between different geomechanical and acoustic properties measured from seven laboratory tested unconsolidated natural sands with different mineralogical compositions and textures were presented. The samples ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)In-cloud icing can cause damage to infrastructure and is challenging to forecast due to lack of a good representation of supercooled liquid water (SLW) in numerical weather prediction (NWP) models. We validate the new ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Ice aprons (IAs) are part of the critical components of the Alpine cryosphere. As a result of the changing climate over the past few decades, deglaciation has resulted in a surface decrease of IAs, which has not yet been ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)Abstract. The orientation and tectonic regime of the observed crustal/lithospheric stress field contribute to our knowledge of different deformation processes occurring within the Earth's crust and lithosphere. In this ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)Many problems in geodynamic modelling result in a non-linear Stokes problem in which the viscosity depends on the strain rate and pressure (in addition to other variables). After discretization, the resulting non-linear ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)We present an efficient implementation of the method for sampling spatial realisations of a 3-D random fields with given power spectrum. The method allows for a multi-scale resolution and approaches well for parallel ...
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(Master thesis / Hovedoppgave, 2004)Abstract This thesis is written as a part of the Cand. Scient. degree at the Institute for Geosciences at the University of Oslo. Traditionally, age determinations of late Cretaceous chalks in the Central Graben in the ...