Blar i Department of Earth Science på tittel
Viser treff 527-546 av 1215
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Internal Ocean Dynamics Control the Long-Term Evolution of Weddell Sea Polynya Activity
(Journal article; Peer reviewed, 2021)Open-ocean polynyas effectively couple the ocean and atmosphere through large ice-free areas within the sea-ice cover, release vast quantities of oceanic heat, and impact deep ocean ventilation. Changes in polynya activity, ... -
Internal structure of a Himalayan debris-covered glacier revealed by borehole optical televiewing
(Journal article; Peer reviewed, 2023)Characterising the structures within glaciers can give unique insight into ice motion processes. On debris-covered glaciers, traditional structural glaciological mapping is challenging because the lower glacier is hidden ... -
An international intercomparison of stable carbon isotope composition measurements of dissolved inorganic carbon in seawater
(Peer reviewed; Journal article, 2019)We report results of an intercomparison of stable carbon isotope ratio measurements in seawater dissolved inorganic carbon (δ 13C‐DIC) which involved 16 participating laboratories from various parts of the world. The ... -
The interplay between surface processes and tectonics in the actively extending central Italian Apennines
(Doctoral thesis, 2020-06-08)The overall objective of this project is to improve our understanding of the interplay between surface processes and tectonics in active continental rifts, based on the central part of the Italian Apennines. Three key ... -
Interpretation of 3D Ground Penetrating Radar data in archaeology by applying seismic attributes
(Master thesis, 2023-11-20)Ground Penetrating Radar (GPR) has emerged as a widely employed geophysical method in archaeological studies, with recent advancements leading to large-scale, high-resolution surveys. The processing techniques applied to ... -
Interpretation of alluvial deposits in deep directional resistivity data: the Triassic Skagerrak Formation, Ivar Aasen, Utsira High
(Master thesis, 2022-06-01)A significant amount of hydrocarbons are contained within fluvial deposits, which constitute potential CO2 storage sites. The Skagerrak 2 reservoir zone of the Triassic Skagerrak Formation in the Ivar Aasen field (North ... -
Interpretation of fluvial deposits in Deep Directional Resistivity data - Comparison of the Skagerrak Formation at the Ivar Aasen Field to the Morrison Formation, Utah, USA
(Master thesis, 2023-06-01)Fluvial deposits are important reservoirs in the subsurface and may host significant amounts of hydrocarbons and will offer significant volume for subsurface CO2-storage in the future. Such reservoirs are commonly complex ... -
Interpreting archaeological site-formation processes at a mountain ice patch: A case study from Langfonne, Norway
(Journal article; Peer reviewed, 2021)In the context of global warming, ice patches are increasingly important foci of high-elevation archaeology. Langfonne in Jotunheimen, central southern Norway, is uniquely suited to provide a window onto site formation ... -
Intraplate Earthquakes in Nordland, Northern Norway : Insight from Seismic Tomography and Earthquake Analysis
(Doctoral thesis, 2023-01-19)Intraplate-seismisitet refererer til jordskjelv i områder som ikke er påvirket av prosessene langs aktive plategrenser. Det totale seismiske momentet utløst fra intraplatejordskjelv er mye mindre enn fra jordskjelv i ... -
Inversion of seismic AVA data for porosity and saturation
(Master thesis, 2013-06-27)Rock physics serves as the link between reservoir parameters and the effective elastic reservoir properties, and Amplitude Variation with Angle (AVA) modelling serves as the link between elastic properties and reflection ... -
Inversion of Teleseismic Polarization Data for Crustal Velocities in Norway
(Master thesis, 2017-06-23)To characterize the crustal and upper mantle structure it is possible to perform a joint inversion of receiver functions and apparent S-velocities. The inversion is performed using a linearized weighted iterative least-squares ... -
Inversion of the Linear and Parabolic Radon Transform
(Master thesis, 2010-05-31)Different mathematical techniques are applied to the linear and parabolic Radon transforms. Including a review of classical work, recent developments, and testing of two proposed methods. Studies span from sampling and ... -
Inversion of time-lapse seismic waveform data using integral equation methods
(Master thesis, 2018-06-20)Time-lapse seismic data are considered a valuable tool for monitoring hydrocarbon reservoirs. Since the changes in elastic parameters associated with production of hydrocarbons, or injection of CO2 into a reservoir, tend ... -
Investigating Fine‐Scale Permeability Structure and Its Control on Hydrothermal Activity Along a Fast‐Spreading Ridge (the East Pacific Rise, 9°43′–53′N) Using Seismic Velocity, Poroelastic Response, and Numerical Modeling
(Peer reviewed; Journal article, 2019)Along with the intracrustal heat source, crustal permeability is considered as the controlling factor for hydrothermal circulation within zero‐age oceanic crust. To obtain fine‐scale, 2‐D models of upper crustal permeability ... -
Investigating multiple sulfur isotope variations in active hydrothermal chimneys and fluids from the Arctic Mid Ocean Ridges
(Master thesis, 2022-05-09)The four different vent fields Seven Sisters, Soria Moria, Fåvne and Loki’s Castle are all located on the ultra-slow spreading AMOR. The Seven Sisters and the Soria Moria vent fields are located on the southern part of the ... -
Investigation and optimization of OBC sensor array coupling to the seafloor: Novel approach to systematic testing of receiver coupling
(Doctoral thesis, 2013-10-29)The most important challenge for the oil-industry is to increase the recovery rates for existing oil and gas fields and to map fluid movements with time-lapse 4D seismic, ensure caprock integrity and reduce geo-hazards or ... -
An investigation into the potential of a new quantitative DHI method
(Master thesis, 2018-06-22)The seismic response of a layer boundary is dependent on a variety of geological factors and is likely to vary significantly along a given reflector. An aspect that seems to be underutilised in the current DHI methods is ... -
Investigation of changes in Briksdalsbreen, western Norway from 1966 - 2020
(Master thesis, 2023-02-06)Briksdalsbreen in western Norway was studied using remote sensing. Sets of optical aerial photographs captured between 1966 to 2020 were used with LiDAR-based Digital Elevation Models (DEMs) and glacier outlines derived ... -
Investigation of fungal growth and its influence on the permeability of the oceanic crust - Method Development using Penicillium Rubens
(Master thesis, 2024-06-03)The deep biosphere within the oceanic crust is a tantalizing frontier of the geomicrobiology field with many unanswered questions owing to great challenges that need to be overcome when investigating this habitat. Fungi ... -
Investigations of abrupt climate change offshore east Greenland continental margin during marine isotope stages 3 and 5
(Master thesis, 2016-06-01)Paleoclimatic records obtained from western Nordic Seas core GS15-198-38CC (70°N, 17°W) exhibit fluctuating climatic patterns of millennial time scales. Here, foraminifera isotope records used to reconstruct sea surface ...