Blar i Department of Earth Science på utgivelsesdato
Viser treff 21-40 av 1034
-
Kan biologikunnskap bidra til økt forståelse av komplekse geologiske systemer?
(Master thesis, 2023-06-08)Jordsystemet i geologi består av fem delsystemer: geosfæren, atmosfæren, hydrosfæren, kryosfæren, og biosfæren. Til tross for dette blir sistnevnte underkommunisert gjennom geofag-undervisning på vgs-nivå. Jordsystemet ... -
Full Waveform Inversion and Multi-Diagonal Inversion for Monitoring of CO2 Storage at Sleipner
(Master thesis, 2023-06-01)Carbon capture and storage (CCS) can become necessary for mitigating climate change. However, storing CO2 in subsurface reservoirs requires thorough monitoring. The most accurate and widespread type of monitoring is seismic ... -
Microseismic Waveform Modeling and Inversion using Finite-Difference and Global Optimization
(Master thesis, 2023-06-01)Estimating microseismic source parameters is an essential part of a microseismic monitoring project. Typically the microseismic source position and origin time are estimated utilizing kinematic methods, while the moment ... -
Stratigraphic and Tectonic development of the Nyk High
(Master thesis, 2023-06-01)This thesis aims to develop a holistic model of the stratigraphical and tectonic development of the Nyk High structure in the Northern Vøring Basin, explicitly focusing on the Cretaceous-Paleocene transition. The thesis ... -
Miljøkonsekvenser av tidligere gruvedrift på Litlabø, Stord
(Master thesis, 2023-06-01)Gruvedrift medfører miljøutfordringer, der håndteringen av sulfidholdige overskuddsmasser er spesielt utfordrende siden oksidering og forvitring av disse massene ofte medfører sur avrenning og utlekking av miljøskadelige ... -
Fault Zone Characterization and Monitoring of CO2 Storage using Full Waveform Inversion
(Master thesis, 2023-06-01)CO2 storage in geological formations is essential to limit global warming and reduce the effects of climate change. In order to store CO2 safely and prevent leakage, proper sealing mechanisms are required. Faults are complex ... -
Elastic Seismic Imaging and Probabilistic AVO Inversion: Application to CO2 Storage at Sleipner
(Master thesis, 2023-06-01)In order to reduce the effect of global warming, carbon capture and storage (CCS) is considered to be important as it reduces the amount of CO2 in the atmosphere. Geophysical monitoring is essential for safe storage of ... -
Machine learning and artificial neural networks for seismic processing
(Doctoral thesis, 2023-05-05)Nylig har tilgjengeligheten av kraftige GPUer og "open source"-programvare gjort det mulig for kunstige nevrale nettverk å løse flere praktiske og industrielle problemer. Vi kan bruke nevrale nettverk til viktige seismiske ... -
Simultaneous tracking of multiple whales using two fiber-optic cables in the Arctic
(Journal article; Peer reviewed, 2023-04-28)Climate change is impacting the Arctic faster than anywhere else in the world. As a response, ecosystems are rapidly changing. As a result, we can expect rapid shifts in whale migration and habitat use concurrent with ... -
Deglacial changes in western Atlantic sea surface temperatures and ice sheet variability
(Master thesis, 2023-04-11) -
Ocean–Ice Sheet Coupling in the Totten Glacier Area, East Antarctica: Analysis of the Feedbacks and Their Response to a Sudden Ocean Warming
(Journal article; Peer reviewed, 2023-04-01)We coupled together high-resolution versions of the ocean–sea ice model NEMO and the ice sheet model BISICLES configured to the Totten Glacier area and ran a series of simulations over the recent past (1995–2014) and under ... -
Analysis of storm surge events along the Norwegian coast
(Journal article; Peer reviewed, 2023-02-08)Observed extreme sea levels are caused by a combination of extreme astronomical tide and extreme storm surge, or by an extreme value in one of these variables and a moderate value in the other. We analyzed measurements ... -
Updating of geological surfaces during drilling by map migration
(Master thesis, 2023-01-23)The accuracy of the geological surfaces in an earth model is dependent on the estimation of the velocities from surface seismic data. The dataset recorded from reverse VSP of the drill bit continuous signal can be utilized ... -
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 ... -
Mineralogical distribution and genetic aspects of cobalt at the active Fåvne and Loki’s Castle seafloor massive sulfide deposits, Arctic Mid-Ocean Ridges
(Journal article; Peer reviewed, 2023)The demand for responsibly sourced cobalt has increased dramatically as a result of the global transition to ‘fossil-free’ electromobility. However, the distribution, mineralogical expressions and mechanisms of concentration ... -
Sedimentary ancient DNA reveals local vegetation changes driven by glacial activity and climate
(Journal article; Peer reviewed, 2023)Disentangling the effects of glaciers and climate on vegetation is complicated by the confounding role that climate plays in both systems. We reconstructed changes in vegetation occurring over the Holocene at Jøkelvatnet, ... -
Sedimentary deposits and bioturbation in an Early Cretaceous subarctic stormy greenhouse shelf environment
(Journal article; Peer reviewed, 2023)This study of the Aptian lower part of the Carolinefjellet Formation in Svalbard, Norwegian high Arctic, is based on well cores and outcrop section in the Adventdalen area of Spitsbergen and reports on the deposits and ... -
Impact of seasonal fluctuations of ice velocity on decadal trends observed in Southwest Greenland
(Journal article; Peer reviewed, 2023)By tracking the feature displacement between satellite images spaced approximately one year apart, surface runoff has been shown to have a long-term impact on the average ice flow of a land-terminating sector of Greenland. ... -
Ötzi, 30 years on: A reappraisal of the depositional and post-depositional history of the find
(Journal article; Peer reviewed, 2023)When Ötzi, the Iceman, was found in a gully in the Tisenjoch pass in the Tyrolean Alps in 1991, he was a huge surprise for the archaeological community. The lead initial investigator of the find argued that it was unique, ...