The inner Oslofjord has undergone many changes in ecological quality throughout time. The Vestfjorden Avløpsselskap (VEAS) wastewater treatment plant has been involved in these changes with a generally positive effect. ...

Potential field analysis is known to suffer from the problem of "non-uniqueness" in solutions. Gravity data interpretation is a prime example. Anomalous bodies can be detected from the gravity field, but information regarding ...

In the Late Neoproterozoic the supercontinent Rodinia started to disintegrate, and the continents Baltica and Laurentia began to rift apart to form the Iapetus Ocean. Early stages of subsidence caused by ductile stretching ...

Intrusive rocks of the Green Foyaite Suite make up a substantial fraction of the southern part of the Pilanesberg Complex. The rocks range from fine-grained foliated foyaites (nepheline syenites) with clinopyroxenes ...

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 ...

In this study, high resolution 3D seismic data, supplemented with regional 2D seismic lines covering the Fingerdjupet Subbasin to Bjarmeland Platform region have been interpreted. The scope of this study has been to constrain ...

Impact craters are a common geological feature found on a variety of planetary bodies throughout the Solar System and can reveal information about the history of the Solar System and its planets. Specifically, crater ...

The Hardangervidda – Ryfylke Nappe Complex is a dominant element in the southwestern segment of the Norwegian Caledonides. The section in Røldal includes a Proterozoic basement, with the following over-thrusted allochthonous ...

Smeaheia is a proposed site for long-term storage of CO2. The site is located on the Horda Platform off the western coast of Norway, situated between the Vette and Øygarden Faults. The burial and uplift history of a basin ...

Sedimenter i Edvard Grieg-feltet ble dannet for 200 millioner år siden. Gjentatte flomperioder har brakt store mengder sedimenter som ble avsatt som stor vifteavsetninger (såkalte alluvialevifter) langs dalsidene. Viftene ...

Exploration in the Barents Sea has shown to be difficult, due to the regional tectonic history to the area. Multiple uplift events, faulting and erosion make the well log data behave differently than expected in other areas ...

Understanding geologic risks that could hinder successful geologic CO2 capture and storage (CCS) in a prospective area is imperative before moving forward with a storage project. Containment of injected CO2 requires the ...

The purpose of the thesis is to establish a baseline discrete fracture network model for the area leading up from the back scarp to Flosteinbba above the unstable rock slope at Åknes. The model is intended to identify the ...

The effects of pore pressure and fluid saturation on the seismic velocity changes are coupled and important to discriminate one from the other in the context of time-lapse monitoring of fluid injection into the subsurface ...

In southern Norway and Sweden, the Sveconorwegian orogenic belt hosts over 5000 pegmatite bodies (1100-900 Ma) usually clustered in local pegmatite fields. The Spro pegmatite, the object of this study, occurs, however, as ...

Every year Norwegians produce tons of waste by extracting resources, producing products with short lifespans and disposing after the product end of life. This is not a sustainable model for our society, and many countries ...

In previously glaciated mountain regions rock-slope failure processes contribute significantly to landscape development and may pose a direct or indirect threat to the population and infrastructure in inhabited areas. In ...

Fremtidens klima kommer til å føre til flere store nedbør- og snøsmeltingshendelser. I dag utgjør dette en stor del av utløsende årsak for løsmasseskred. Det vil si at for å minimere skadeomfanget som kan oppstå med ...

Despite its similarities in bulk properties to Earth, Venus portrays a fundamentally different mode of surface tectonics. Venus is currently known to be operating in stagnant lid mode of mantle convection. However, it is ...

Abstract The origin of Large Igneous Provinces (LIPs) associated with continental breakup and the reconstruction of continents older than c. 320 million years (pre-Pangea) are contentious research problems. Here we study ...

The traditional airgun source has for a long time been the preferred type of source in marine seismic data acquisition due to its high impulsive pressure output. However, this impulsive energy has recently been of concern ...

Underestimation of the proportion of supercooled liquid in mixed‐phase clouds in climate models has called into question its impact on Arctic climate change. We show that correcting for this bias in the CESM model can ...

The evolution of the Øygarden Fault Complex (ØFC) footwall is studied using tectonostratigraphic analysis of 3D seismic reflection data. The footwall is comprised of a North-South trending graben bounded by three reactivated ...

The main objectives of this thesis were to study basalt alteration and formation of secondary phases and their implications on Mars (Paper I), and potential consequences for petroleum reservoirs influenced by the presence ...

Although the Triassic-Jurassic sandstones of the Realgrunnen Subgroup form the primary reservoir units in the Barents Sea, there are relatively few published studies targeting these formations in the central and northern ...

Kongsfjorden, in the Spitsbergen, is 26 km long and surrounded with glaciers with different dynamic behavior. Mass balance of the entire glacierized area of Kongsfjord basin is +0.23 m w.e. a-1 over the period 1980-2016 ...

The impacts of enhanced heterogeneous ice nucleation (HET) on the properties of deep convective clouds (DCCs) have been investigated in cloud‐resolving simulations with the WRF‐CHEM model. The study focuses on a case ...

De senere år har flere steder i Norge blitt rammet av masseførende flommer som har gjort stor skade på infrastruktur og bebyggelse. Dette er ikke bare veldig kostbart, men utgjør også en belastning for personer som bor i ...

Løsmasseskred har potensiale til å forårsake stor skade på mennesker, bygninger og infrastruktur. Slike hendelser ansees derfor som et potensielt stort samfunnsproblem. Hyppigheten av skredhendelser er i tillegg forventet ...

In the contemporary world, many environmental and water resources related decisions rely upon wide range of modelling results. However, models are simplified representations of reality and their predictions are generally ...

In this study, we combine remote sensing, in situ and model-derived datasets from 1966 to 2014 to calculate the mass-balance components of Kronebreen, a fast-flowing tidewater glacier in Svalbard. For the well-surveyed ...

All countries are affected by natural hazards in different ways. The recently launched Synthetic Aperture Radar (SAR) Sentinel-1 A and B twin satellites provides large amounts of high-resolution radar data due to their, ...

This PhD thesis addresses how fault and fold growth affect accommodation development and sediment routing and fill in extensional basins. Extensional basins are key constituents of passive continental passive and ...

Degrading permafrost is an increasingly important problem in high altitude alpine mountains and Arctic regions around the world because it exerts a primary control on rock falls and landslides in these areas. The present ...

This study evaluates MODIS snow cover characteristics for large number of snowmelt runoff events in 145 catchments from 9 countries in Europe. The analysis is based on open discharge daily time series from the Global Runoff ...

Dagens aktsomhetskart for snøskred båndlegger store arealer i Norge og ekspertene anser aktsomhetssonene å være for store i mange tilfeller, spesielt ved kystnære områder. I områder med innlandsklima er problematikken i ...

The abandoned sulfide ore mines located at Folldal, in central Norway, have been closed since 1993. However, centuries of mining activities have resulted in waste rock and tailings exposed to the natural environment. All ...

The Nordic Centre of Excellence CRAICC (Cryosphere–Atmosphere Interactions in a Changing Arctic Climate), funded by NordForsk in the years 2011–2016, is the largest joint Nordic research and innovation initiative to date, ...

Svalbard is an archipelago of islands covering an area of around 61000 km2 north of the Arctic Circle. The region is heavily glaciated, with more than 2100 glaciers covering around 59% of its total area. In a process known ...

The aim of this thesis has been to look at the possibility of using a convolutional neural network to attenuate seismic interference (SI) noise in marine seismic data. Modern SI-denoising algorithms employed by the industry ...

The study area is located north of Iceland in the Jan Mayen-East Greenland area, NE Atlantic. It has a number of magmatic productions. Magmatism in Iceland is related to a mantle plume bringing hot mantle up from deeper ...

Previous studies showed the importance to have information about the vertical distribution of precipitation to simulate snow and related cyclone development correctly in regional, mesoscale models. During Christmas 2016, ...

With dense SAR satellite data time series it is possible to map surface and subsurface glacier properties that vary in time. On Sentinel-1A and RADARSAT-2 backscatter time series images over mainland Norway and Svalbard, ...

This PhD aims primarily to assess the long-term sealing capabilities of shaly seal rock units overlying potential adequate CO2 storage reservoirs. The motivation for the project has been that in order to reduce CO2 emissions ...

Rock salt creeps under shear at the low temperatures encountered close to the surface. Salt flow is problematic for any cavity, like caverns or wells, because of the time dependent closure it induces if the internal hole ...

Volcanoes are both threat to life and source of economic wealth, however little is known about the processes in the Earth’s crust leading to their origin. Laboratory models are used to shed light on the otherwise inaccessible ...

Mobility of sand by fluidization, so-called sand tectonics, can drive surface movements and thereby have a significant impact on depositional environments. Deformation related to sand mobilization is a typical understudied ...

Seismic signals are generally spread across many data samples of the recorded data. Applying a mathematical transformation to the data can however concentrate them on few samples only of the transform domain. Such ...

Stable water isotopes have become a key element in hydrological and atmospheric research topics. Hydrologists aim to close the water cycle, and the improvement of measurement techniques and models makes that they come ...

The water cycle and its extremes are heavily affected by human activities, such as reservoirs operations and water abstractions. The aim of this study was to evaluate impacts of human interventions (HI) on the water cycle ...

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 ...

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 ...

The Mandawa Basin situated in south coastal Tanzania, has been a site for scientific research since the 1900s and a prospect for hydrocarbon exploration from the 1950s. The basin is located approximately 80 km west of the ...

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 ...

Den tektomagmatiske aktiviteten i Oslofeltet startet i slutten av karbon og endte muligens så sent som i trias. Tidspunktet for da den tektomagmatiske aktiviteten startet, er godt begrenset, både ved biostratigrafi og ved ...

The PhD thesis is a collection of four articles that investigate the controls of syn- and post-kinematic faulting on reservoirs. Case studies from the Barents Shelf are presented (Svalbard and the Hammerfest Basin). Offshore ...

The global circulation driven solely by relaxation to an idealized surface temperature profile and to interior mixing is examined. Forcing by winds and evaporation/precipitation is excluded. The resulting circulation ...

Fracture networks inside geological CO2 storage reservoirs can serve as primary fluid flow conduit, particularly in low-permeability formations. While some experiments focused on the geophysical properties of brine- and ...

CO2 sequestration in geological formations is a promising technology and a crucial measure to reduce CO2 emissions across the energy system. It is an essential part of the solution for mitigating climate change caused by ...

This study assesses changes in glacier area, velocity, and geodetic mass balance for the glaciers in the Manaslu region of Nepal, a previously undocumented region of the Himalayas. We studied changes between 1970 (for ...

Air pollution from traffic is a major health problem in urban areas, and there is a great interest in modeling and measuring the dispersion of pollutants from near- ground sources. Due to the complex nature of the motions ...

This thesis explores the meteorology in an urban area during a winter period and how well a numerical model is able to represent it. The air quality in the cities is of large interest to the citizens and policymakers. ...

Sudden Stratospheric Warmings (SSW) affect the chemistry and dynamics of the middle atmosphere. Major warmings occur roughly every second winter in the Northern Hemisphere (NH), but has only been observed once in the ...

Large amounts of methane are stored in continental margins as gas hydrates. They are stable under high pressure and low temperature, but react sensitively to environmental changes. Bottom water temperature and sea level ...

The chemical composition of the continental crust cannot be adequately explained by current models for its formation, because it is too rich in Ni and Cr compared to that which can be generated by any of the proposed ...

This work presents a study on the interrelationship of burial diagenesis, depositional facies, the origin and distribution of diagenetic clay minerals, and diagenesis in sediment–sill sequences, as well as the thermal ...

We used a finite element model to interpret anti-correlated pressure variations at the base of a glacier to demonstrate the importance of stress redistribution in the basal ice. We first investigated two pairs of load cells ...

Debris flows and debris avalanches represent a large threat to society in Norway. The intensity and frequency of these events is expected to increase over the course of the next 50 years due to changing precipitation ...