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Now showing items 101-200 of 2336
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
Understanding of fluid-mixture properties relevant to the Longyearbyen CO2 Lab pilot project (LYBCO2) is of great importance for the assessment of the injection performance. Phase equilibria and density of the binary, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Amplified warming at high latitudes over the past few decades has led to changes in the boreal and Arctic climate system such as structural changes in high-latitude ecosystems and soil moisture properties. These changes ...
(Journal article / Tidsskriftartikkel / PublishedVersion, 2019)
The extensive lava piles of Iceland contain a unique record of geomagnetic field variations spanning the past ~ 16 Ma. Since the 1950s, palaeomagnetic data have been obtained from over 9400 Icelandic lavas. We have compiled ...
(Doctoral thesis / Doktoravhandling, 2018)
Microscopic plant remains (spores and pollen) allow us to trace vegetation and detect environmental, especially climatic changes from deep time in the geological past. The Late Triassic (237-201 Ma) period is marked by an ...
(Doctoral thesis / Doktoravhandling, 2013)
The Ritland structure is the remnants of a 2.7 km diameter, 350 m deep, Early to Middle Cambrian marine impact crater, located in Hjelmeland, western Norway. The impact origin of this structure was proposed in 2001 based ...
(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 ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
Strain localisation structures, such as shear fractures and compaction bands, are of importance due to their influence on permeability and therefore outgassing, a factor thought to influence eruptive style. In this study, ...
(Research report / Forskningsrapport, 2003)
(Doctoral thesis / Doktoravhandling, 2010)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Classical models of lithosphere thinning predict deep synrift basins covered by wider and thinner post‐rift deposits. However, synextensional uplift and/or erosion of the crust are widely documented in nature (e.g. the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Lusi is a sediment‐hosted hydrothermal system featuring clastic‐dominated geyser‐like eruption behavior in East Java, Indonesia. We use 10 months of ambient seismic noise cross correlations from 30 temporary seismic stations ...
(Doctoral thesis / Doktoravhandling, 2013)
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
Rock deformation experiments performed at X-ray synchrotrons provide unique insights into the nature of fracture network development. However, these insights depend on the limitations of the X-ray tomography data. Here, ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
The Fingerdjupet Subbasin in the southwestern Barents Sea sits in a key tectonic location between deep rifts in the west and more stable platform areas in the east. Its evolution is characterized by extensional reactivation ...
(Research report / Forskningsrapport, 2005)
(Doctoral thesis / Doktoravhandling, 2013)
Snow avalanches are a natural phenomenon occurring in snow covered alpine areas all over the world. A complex process combining gravity, topographical conditions, physical and mechanical properties of snow and meteorological ...
(Doctoral thesis / Doktoravhandling, 2022)
A simplified Earth’s structure consists of three geological layers: a stiff lithosphere (plates), a mantle and a core. Like for an example your favorite yogurt, the rock in the solid mantle can be flowing, but it requires ...
(Doctoral thesis / Doktoravhandling, 2010)
This thesis uses ground-based, airborne and spaceborne elevation measurements to estimate elevation change and mass balance of glaciers and ice caps on the Svalbard archipelago in the Norwegian Arctic. Remote sensing data ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
The strong winds prevalent in high altitude and arctic environments heavily redistribute the snow cover, causing a small-scale pattern of highly variable snow depths. This has profound implications for the ground thermal ...
(Doctoral thesis / Doktoravhandling, 2012)
This thesis adresses the problem of how to image the time-varying sea surface based on dual sensor marine seismic data. Although flat and stationary sea surface assumptions may suffice during the processing of marine seismic ...
(Doctoral thesis / Doktoravhandling, 2021)
Snow avalanches present a common natural hazard in snow-covered mountainous areas throughout the world. However, most snow avalanche research has taken place in mid-latitude locations, thereby limiting knowledge of avalanche ...
(Doctoral thesis / Doktoravhandling, 2012)
(Doctoral thesis / Doktoravhandling, 2016)
(Doctoral thesis / Doktoravhandling, 2012)
(Doctoral thesis / Doktoravhandling, 2012)
(Doctoral thesis / Doktoravhandling, 2022)
Building confidence in subsurface geological carbon dioxide (CO2) injection project
The anthropogenic atmospheric carbon dioxide (CO2) is one of the major greenhouse gases that are responsible for human-induced global ...
(Doctoral thesis / Doktoravhandling, 2014)
Glaciers are among the most frequently used natural phenomena to illustrate ongoing global warming. Retreating glacier tongues and the reduction of glacierized areas are visible all over the world. Changes in glacier volume ...
(Doctoral thesis / Doktoravhandling, 2015)
This dissertation investigates the physical structure of the crust and upper mantle in southwestern Scandinavia using different seismological and non-seismologic geophysical methods:
1. The S-wave velocity structure of ...
(Doctoral thesis / Doktoravhandling, 2022)
Atmospheric icing is a major weather hazard which imposes threats to critical infrastructure by accumulation of heavy ice loads. This includes structures such as power lines, bridges, telecommunication towers, wind turbines, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
Knowledge of water-surface velocities in rivers is useful for understanding a range of river processes. In cold regions, river-ice break up and the related downstream transport of ice debris is often the most important ...
(Research report / Forskningsrapport, 1997)
(Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
The processes that form and recycle continental crust have changed through time. Numerical models reveal an evolution from extensive recycling on early Earth as the lower crust peeled away, to limited recycling via slab ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
The climatic effects of climate engineering—or geoengineering—via cirrus cloud thinning are examined. Thinner cirrus clouds can allow more outgoing longwave radiation to escape to space, potentially cooling the climate. ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
The Mjølnir structure, SW Barents Sea, is one of the best-preserved marine impact craters on Earth. After impact on the paleo-seafloor about 142 Ma ago, this crater experienced an atypical deformation of its central peak, ...
(Master thesis / Masteroppgave, 2005)
Seepage and slope stability issues concerning infiltration in unsaturated slopes are investigated and presented. 2-D finite element analyses are used to study the effects of the different hydraulic characteristics of a ...
(Master thesis / Masteroppgave, 2010)
Most maps and publications dealing with the geology of the Bodø-Sulitjelma area have postulated the presence of a major basement culmination; the “Heggmovatn basement dome” between Bodø and Fauske. Granitic gneisses and ...
(Master thesis / Masteroppgave, 2008)
This thesis is a short investigation of cirrus clouds above the ALOMAR observatory at Andøya.
Ice clouds are one of the main uncertainties in the cloud effects in atmospheric modelling.
Especially ice clouds in the arctic ...
(Master thesis / Masteroppgave, 2007)
ABSTRACT
Borehole geophysical logging is viable method of determining the water quality and hydrogeological parameters of aquifers. A recent study was conducted to delineate the distribution of formation water salinity ...
(Master thesis / Masteroppgave, 2007)
Studies have demonstrated that hydrophobic organic compounds (HOC) show strong sorption to black carbon (BC). Therefore presence of BC in HOC contaminated sediment reduces the in situ freely dissolved aqueous concentration ...
(Research report / Forskningsrapport, 2000)
(Master thesis / Masteroppgave, 2008)
Literature studies considering the determination of rockfall runout range have shown that the utilization of rigorous physical models yields significantly different results. This is primarily due to the fact that rockfall ...
(Master thesis / Masteroppgave, 2007)
Digital terrain modeling has revolutionized the way topography is characterized and analyzed. Its applicability has widened to almost anything where topography has a role to play. On the other hand, digital soil mapping ...
(Master thesis / Masteroppgave, 2005)
Oppgaven presenterer et klassifiseringssystem for inndeling av elvelandskapstyper langs vassdrag, og er utviklet for at det skal kunne brukes på ulike typer vassdrag. Antall elvelandskapstyper kan variere etter representativitet ...
(Master thesis / Hovedoppgave, 2003)
The use of petroleum inclusions in petroleum and reservoir geology is a relative new tool utilized to get a better understanding of petroleum generation and migration, paleo-fluid distribution in traps, and the organic ...
(Master thesis / Masteroppgave, 2005)
Hovudmålet med oppgåva har vore å lage ein metode for å klassifisere elvelandskap. Elvelandskap er definert som planmønster saman med naturtypen på elvebreidda. Hovudverktøyet skal vere M711-kartserien, og støtteverktøy ...
(Master thesis / Masteroppgave, 2005)
The risk associated with exposure to contaminants has, in recent years, drawn attention to the fate and transport of these contaminants in shallow marine sediments. It has been suggested that the transport of Hydrophobic ...
(Master thesis / Masteroppgave, 2007)
Oppgaven ser på muligheten for å benytte eldre flybilder med varierende kvalitet og temporal oppløsning for å detektere signifikant overflatedeformasjon i fjellsiden Torfastaðamelar, Hlíðarfjöll på Øst Island. Ved bruk av ...
(Master thesis / Masteroppgave, 2005)
Estimates are given of radiative forcings from various anthropogenic sources of stratospheric water vapor. These sources are direct emissions of water vapor from airplanes and the production of stratospheric H$_2$O by ...
(Master thesis / Hovedoppgave, 2005)
Fjellskred i Norge har hatt fatale konsekvenser i historisk tid.
Kartlegging, undersøkelser og overvåkning av potensielt rasfarlige
områder er viktig siden vi vet at nye fjellskred vil komme.
I denne oppgaven gjøres ...
(Master thesis / Masteroppgave, 2020)
Partitioning precipitation into rain and snow is of pivotal importance in hydrological models. Errors in correctly determining precipitation phase at the surface can propagate into other parts of the model, and there is a ...
(Doctoral thesis / Doktoravhandling, 2009)
This thesis presents a study of the landsystem of the Svalbard tidewater glacier Paulabreen and its late Holocene surge moraines, focusing on the glaciology and the glacial geology. An active surge of Skobreen/Paulabreen ...
(Master thesis / Masteroppgave, 2007)
The risk associated with exposure to contaminants, has drawn attention to the fate and transport of contaminants in marine sediments. Remediation of contaminated marine sediment has been necessary at several locations to ...
(Master thesis / Hovedoppgave, 2005)
På vestre del av Ringkøbing-Fynhøyden, mellom Sentralgraben og Horngraben, går det et skillet fra kaledonsk basement til prekambisk basement. Skillet kartlegges ved å følge forkastninger over basement, ettersom disse ...
(Master thesis / Masteroppgave, 2005)
Sammendrag
Norges Geotekniske Institutt (NGI) har, på oppdrag fra Norges Vassdrags og Energidirektorat (NVE) inndelt kvikkleiresoner i fem risikoklasser basert på en evaluering av ”skadekonsekvens” og ”faregrad”. Det er ...
(Master thesis / Masteroppgave, 2005)
Abstract
This thesis concerns certain aspects of the production of CCN. In-cloud oxidation followed by cloud droplet evaporation is an important chemical process where sulfate is produced, and only particles with radii ...
(Master thesis / Hovedoppgave, 2007)
Det samlede arealet til de målte breene på Spitsbergen utgjør kun ca 0.5 % av det totale brearealet og halvparten av disse breene har et areal under 10km2 (Hagen et al. 2003). Ekstrapolasjon av målt massebalanse fra de ...
(Master thesis / Masteroppgave, 2008)
Til tross for at isskred fra breer sjelden forekommer, utgjør disse en kontinuerlig fare for menneskeliv og infrastruktur lokalisert i nærområdene. Skred fra bratte breer kan forekomme som en naturlig del av ablasjonsprosessen ...
(Master thesis / Masteroppgave, 2007)
(Master thesis / Masteroppgave, 2005)
Next to air, water is the most essential of Man’s requirements for life. The amount of water necessary to society has increased as population and urbanisation have increased. Today, conflicting interest on water issues ...
(Master thesis / Masteroppgave, 2008)
Abstract
The Nesodden study area is part of the complex Southwest Scandinavian Domain in the Baltic Shield. To investigate its magmatic/metamorphic evolution, and to constrain magma sources, 482 in situ LA-MC-ICPMS U-Pb ...
(Master thesis / Masteroppgave, 2006)
Oppgavens problemstilling er å gjøre en klassifisering av resente ferskvannsdeltaer på bakgrunn av planform (geomorfologi) sett fra kart og flybilder. Klassifikasjonens anvendelighet testes på norske ferskvannsdeltaer.
...
(Master thesis / Hovedoppgave, 2006)
In sedimentary basins sills have a tendency to become emplaced in litholgies of lower mechanical competence, like shales, which can possess source rock qualities.
In this study has the thermal effects of thick sills on ...
(Master thesis / Masteroppgave, 2006)
Abstract
Supercooled cloud droplets combined with strong wind, can produce heavy
ice accretions on unheated structures. It is called ”in-cloud atmospheric icing”,
and is a well known problem at high elevations in wintertime. ...
(Master thesis / Hovedoppgave, 2005)
A study of the important gases in the air at the Ny-Ålesund measuring station
at Svalbard is presented in this thesis. The monitoring station is located 474 m a.s.l. at
Mt. Zeppelin,
a mountain ridge with steep rocky slopes ...
(Master thesis / Masteroppgave, 2006)
Gjennom all tid har menneskene prøvd å få vite så mye om Mars som mulig. Gjennom århundrene har forskerne alltid brukt den mest avanserte teknologien i sin tid. Før Galileo Galilei kunne vi bare observere med det bare øyet, ...
(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 ...
(Master thesis / Masteroppgave, 2005)
The human influence on vegetation causes changes in the surface reflective properties.
By using MODIS land cover and MODIS surface albedo products, an estimation of radiative forcing due to surface
albedo changes caused ...
(Master thesis / Masteroppgave, 2006)
Abstract:
Accurate vegetation mapping is a crucial tool in the decision making process for the proper management of outfield areas. This thesis assesses the use of Landsat TM and ETM+ data for mapping the grazing quality ...
(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 ...
(Master thesis / Masteroppgave, 2018)
Sedimentary rocks from the Grønsennknippa area, located in Vestre Slidre in Valdres, have been studied by field investigations, remote sensing and laboratory techniques. The tectonostratigraphic setting has been briefly ...
(Doctoral thesis / Doktoravhandling, 2009)
Polar lows are important for society because of the sometimes extreme and potentially destructive weather that accompanies them. They appear most frequently at high latitudes on the northern hemisphere, especially over the ...
(Doctoral thesis / Doktoravhandling, 2019)
This study presented in this doctoral thesis addresses the development of the Upper Jurassic Curtis Formation, outcropping in east-central Utah. The study suggests a separation of the Curtis Formation in three geological ...
(Master thesis / Masteroppgave, 2008)
The quest to unravel and better constrain the crustal architecture and related geological processes of South Atlantic margins underscores the importance of this study. This is true considering the huge economic prospect ...
(Master thesis / Hovedoppgave, 2005)
Oslofjorden er en typisk terskelfjord, som har vært utsatt for sterk forurensning over lang tid. Prøveområdet i denne oppgaven ligger ved Slemmestad og utenfor utslippene til Vestfjorden Avløpsselskap (VEAS) i Vestfjorden, ...
(Master thesis / Hovedoppgave, 2006)
Abstract
Glaciers are key indicators for climate change. Mass balance studies form the important link between advances and retreats of glaciers to changes in climate. Mass balance studies were performed in the balance year ...
(Master thesis / Hovedoppgave, 2005)
In this thesis, I present the results of a new approach to pre-stack Kirchoff depth migration using the Kirchoff algorithm and the Fresnel aperture features in order to improve the signal-to-noise ratio of the seismic data ...
(Master thesis / Masteroppgave, 2008)
Some highly atypical oils from Scandinavia have been analysed and compared with some normal oils from the NOCS. The question is whether these atypical oils can represent additional petroleum systems in addition the the ...
(Master thesis / Masteroppgave, 2008)
SAMMENDRAG
Oppgavens hydrologiske problemstilling er knyttet til Maridalsvassdragets nedbørfelt i Oslo. Det 255 km² store feltet har 26 regulerbare magasiner og er et typisk Østlandsvassdrag med snøsmelteflommer og ...
(Master thesis / Hovedoppgave, 2005)
En varslingsmodell har blitt utarbeidet for Sætreskardfjellet ved RV 15, Strynefjellsveien. Feltarbeid ble gjennomført vinteren 2002/03 der det ble logget snøtemperatur og gravd snøprofiler i ulike eksposisjoner og ...
(Master thesis / Masteroppgave, 2006)
Abstract
Stabilizing mercury is still a major challenge throughout the world and no consensus has been reached on the safe disposal of mercy until now. Several methods have been suggested on how to stabilize mercury ...
(Master thesis / Masteroppgave, 2008)
Due to its topography and geological history, Norway is subject to high landslide hazard. On the 20th of June, 1996, a submarine land failure near the village of Finneidfjord (Mid-Norway) developed into a retrogressive ...
(Master thesis / Masteroppgave, 2006)
Deep groundwaters are normally characterized by long residence times in the aquifer and by being well evolved geochemically. At Gardermoen the estimated average groundwater residence time is in the range of 20-30 years. ...
(Master thesis / Masteroppgave, 2007)
Målet med denne oppgåva er å vise korleis eksemplar frå eit lokalt naturmiljø kan innarbeidast som ein del av geografiundervisninga i den vidaregåande skulen. Oppgåva er i hovudsak avgrensa til den naturgeografiske delen ...
(Master thesis / Masteroppgave, 2008)
Underground structures are less sensitive to seismic shaking compared to surface structures. Several case histories reported damages to underground structures during major earthquake events. The damages are mainly related ...
(Master thesis / Masteroppgave, 2008)
Oppgaven undersøker bruk av flytalgoritmer for skredforskning, med spesielt fokus på steinskred. Flytalgoritmer er i utgangspunkt et velbeskrevet fenomen innenfor hydrologien, så inspirasjon hentes fra dette fagfeltet. En ...
(Master thesis / Masteroppgave, 2006)
The study area of this work belongs to continental margin offshore Angola. Despite the large amount of data acquired, the geometries of subsalt sedimentary layers and lower crustal structure offshore Angola remain much ...
(Master thesis / Masteroppgave, 2007)
Abstract
The Norwegian continental shelf is located between 62°N and 69°30 N. It became an area of massive sedimentary outbuilding during the late Cenozoic time when large amounts of glacial sediments were transported ...
(Master thesis / Hovedoppgave, 2007)
The thesis investigates the rheological behaviour of fine-grained slurries in the laboratory using two types of rheometric measuring systems: the vane rheometer and the ball measuring system (BMS). The main purpose is to ...
(Master thesis / Masteroppgave, 2006)
An intense extratropical storm, named Erwin/Gudrun, over the North Atlantic during winter 2005 is investigated to determine atmospheric factors contributing to its development. WRF is the numerical model which has been ...
(Master thesis / Hovedoppgave, 2004)
I dette hovedfagsarbeidet gir en stratigrafisk oversikt og faciestolkning av Melke- og Spekkformasjonen fra brønn 6507/7-5, basert på foraminiferanalyser kombinert med data fra organisk geokjemi, for å belyse avsetningsmiljøet ...
(Master thesis / Masteroppgave, 2008)
ABSTRACT
Mixed siliciclastic carbonate rocks of Lower Eocene age are studied in the eastern part of the Ainsa Basin, Southern Pyrenees. These deposits generally show an upward coarsening and shoaling trend followed by ...
(Master thesis / Masteroppgave, 2008)
ABSTRACT
This master thesis involves the geological mapping, correlation and interpretation of the major fold-fault scheme and detail fracture analysis with emphasis on determining the structural evolution of the area ...
(Master thesis / Masteroppgave, 2006)
This study focuses on the Late Cenozoic development of the Mid-Norwegian continental margin, with emphasis on seismic sequence patterns and relative differential tectonic movements. Seismic stratigraphic framework has been ...
(Master thesis / Masteroppgave, 2007)
1 Abstract
A control run of 150 years for CCSM2 has been performed at the Norwegian
Meteorological Institute. In this run the external forcing(especially
radiation) were held constant, CO2 were held at the level of 1990. ...
(Master thesis / Hovedoppgave, 2007)
I oppgaven sammenliknes egenskapene til digitale høydemodeller generert med henholdsvis TIN-algoritmen(Triangulated Irregular Network) samt Topogrid-interpolasjon(Splines-basert algoritme). Til dette formål benyttes digitale ...
(Master thesis / Masteroppgave, 2005)
This thesis focuses on how variations in snow water equivalent (SWE) and snow covered area (SCA) influence the process
of snowmelt on macro- and localscale and how this could be simulated with proper results in a hydrological ...
(Master thesis / Masteroppgave, 2008)
(Master thesis / Masteroppgave, 2007)
Abstract
This study uses multispectral Landsat satellite imagery and a high resolution Digital Elevation Model based on 1990/95 aerial stereoimagery (Norwegian Polar Institute) to map moraines and glacier terminus positions ...
(Master thesis / Masteroppgave, 2006)
Summary
Two catastrophic and destructive landslides happened as a consequence of a major earthquake on the midnight of June 20, 1990. Their morphology and dynamic analysis are scope of the present study.
The study area ...
(Master thesis / Masteroppgave, 2005)
Two intense cyclones over the North Atlantic during summer/autumn 2003 are investigated to determine atmospheric factors contributing to their development. One of the cases, in August 2003, led to heavy precipitation and ...