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(Doctoral thesis / Doktoravhandling, 2015)
Glacier surging is an internally triggered instability. Surge-type glaciers periodically alternate between long periods of slow flow (the quiescent phase) and short periods of fast flow (the surge phase). Surging yields ...
(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 ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
Observations of velocity, pressure, temperature and salinity in the inner Oslofjord have been analysed to provide new information about the relationships between internal tides generated by tidal currents across the Drøbak ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
In this paper, we semi-automatically classify clean and debris-covered ice for 145 glaciers within Hohe Tauern National Park in the Austrian Alps for the years 1985, 2003, and 2013. We also map the end-summer transient ...
(Doctoral thesis / Doktoravhandling, 2015)
Internal waves are generated when water currents interact with bottom topography, as when tidal flow pass across a sill in a fjord. These internal waves carry energy that is made available for turbulent mixing when the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Globalisation and interregional exchange of people, goods, and services has boosted the importance of and reliance on all kinds of transport networks. The linear structure of road networks is especially sensitive to natural ...
(Doctoral thesis / Doktoravhandling, 2015)
Climate change is one of the most serious environmental threats that humanity has ever been confronted to. Hydrological models are vital tools to asses its impacts on the water cycle and water resources. The goal of this ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
This study presents a reconstruction of the seasonal mass balance of Glacier No. 354, located in the Akshiirak range, Kyrgyzstan, from 2003 to 2014. We use a distributed accumulation and temperature-index melt model driven ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
Continental flood basalts (CFB) are considered as potential CO2 storage sites because of their high reactivity and abundant divalent metal ions that can potentially trap carbon for geological timescales. Moreover, laterally ...
(Journal article / Tidsskriftartikkel / SubmittedVersion, 2015)
(Doctoral thesis / Doktoravhandling, 2015)
The tomographic scanning (TOSCA) family of imagers collects their raw signals from a line-shaped sensitive area scanned across the image plane. An image is then formed by tomographic reconstruction techniques. A TOSCA ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)
The long-term safety of future CO2 storage projects in aquifers will not only rely on a comprehensive geological characterisation of the formation and capillary seal, but also on the ability to effectively monitor the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Igneous sills are common components in rifted sedimentary basins globally. Much work has focused on intrusions emplaced at relatively shallow palaeodepths (0 – 1.5 km). However, owing to constraints of seismic reflection ...
(Doctoral thesis / Doktoravhandling, 2016)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Black carbon (BC) emissions from India for the year 2011 are estimated to be 901.11 ± 151.56 Gg yr−1 based on a new ground-up, GIS-based inventory. The grid-based, spatially resolved emission inventory includes, in addition ...
(Master thesis / Masteroppgave, 2016)
(Research report / Forskningsrapport, 1980)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Albedo is a fundamental parameter in earth sciences, and many analyses utilize the Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF)/albedo (MCD43) algorithms. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Mapping of glacier extents from automated classification of optical satellite images has become a major application of the freely available images from Landsat. A widely applied method is based on segmented ratio images ...
(Doctoral thesis / Doktoravhandling, 2010)
Throughout the history, episodes of excessive volcanism, known as Large Igneous Provinces (LIP), have been emplaced into sedimentary basins. The heat transfer from these volcanic intrusions have important implications for ...
(Doctoral thesis / Doktoravhandling, 2012)
Sudan har vært utsatt for flere år med degredasjon av vegetasjonen og er rammet av klimaendringer som har ført til fatale konsekvenser for Sudans skjøre økonomi og livene til landets 41 millioner mennesker. Vegetasjons- ...
(Doctoral thesis / Doktoravhandling, 2008)
The main goal of this work was to evaluate the possibility of estimating the flow parameters and geological structure of the unsaturated zone, also called vadose zone, using both geophysical and hydrological data and ...
(Research report / Forskningsrapport, 1981)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Permafrost is being degraded worldwide due to the change in external forcing caused by climate change. This has also been shown to affect the morphodynamics of active rock glaciers. We studied these changes, depending on ...
(Doctoral thesis / Doktoravhandling, 2009)
This thesis is submitted for the Philosophy Doctor degree in Petroleum Geophysics at the Section of Petroleum Geology and Geophysics (PEGG), Department of Geosciences, University of Oslo. This study has been financially ...
(Doctoral thesis / Doktoravhandling, 2012)
The combined effect of glacial and periglacial processes on landscape evolution has recently been termed the ‘cryoconditioning’ of landscapes, and largely affect the Fennoscandian landmass. Further, the distribution of ...
(Doctoral thesis / Doktoravhandling, 2008)
The thesis considers trends in European emissions over the past several decades, the quality of these emission inventories and the environmental impact of the emission trends. The focus is on sulfur dioxide and nitrogen ...
(Doctoral thesis / Doktoravhandling, 2017)
(Doctoral thesis / Doktoravhandling, 2011)
Glaciers, ice caps and ice sheets constitute a large reservoir in the global hydrological cycle and provide a coupling between climate and sea-level. Observations of glacial change is important for constraining their ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2008)
A debris flow occurred on 8 May 2004, in Fjǽrland, Western Norway, due to a Glacial Lake Outburst Flood and a natural terminal moraine failure. The site was investigated in 2004 and 2005, using pre- and post-flow aerial ...
(Doctoral thesis / Doktoravhandling, 2010)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Abstract. In the eastern Atlantic Ocean, several volcanic archipelagos are located close to the margin of the African continent. This configuration has inspired previous studies to suggest an important role of edge-driven ...
(Doctoral thesis / Doktoravhandling, 2011)
(Doctoral thesis / Doktoravhandling, 2014)
Internasjonalt forbruk av varer og tjenester er en pådriver for økt global produksjon og utslipp av drivhusgasser. Et eksempel er økende internasjonal handel av Brasiliansk biff og soyabønner som øker presset på regnskogen ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Molecular tracers in secondary organic aerosols (SOAs) can provide information on origin of SOA, as well as regional scale processes involved in their formation. In this study 9 carboxylic acids, 11 organosulfates (OSs) ...
Transfer of olivine crystallographic orientation through a cycle of serpentinisation and dehydration
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
Our ability to decipher the mechanisms behind metamorphic transformation processes depends in a major way on the extent to which crystallographic and microstructural information is transferred from one stage to another. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Gondwana was an enormous supertarrane. At its peak, it represented a landmass of about 100 × 106 km2 in size, corresponding to approximately 64% of all land areas today. Gondwana assembled in the Middle Cambrian, merged ...
(Doctoral thesis / Doktoravhandling, 2008)
This dissertation was motivated by the realization that four concepts, which are too simplistic, are widely assumed in the petroleum industry:
First, mechanical compaction and associated disequilibrium compaction are ...
(Doctoral thesis / Doktoravhandling, 2009)
Despite the large improvements of numerical weather prediction models (NWP) during the last decades, including more advanced data assimilation methods that allow extensive use of satellite data, such models still occasionally ...
(Doctoral thesis / Doktoravhandling, 2011)
In a changing climate, terrestrial water storages are of great interest as water availability impacts key aspects of ecosystem functioning. Thus, a better understanding of the variations of wet and dry periods will contribute ...
(Doctoral thesis / Doktoravhandling, 2012)
(Doctoral thesis / Doktoravhandling, 2011)
The state of the continental ice masses has a direct impact on the global sea level. Changes in the polar regions will not only impact the people living in the Arctic, but also people living along coastlines around the ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
The Early Eocene continental breakup was magma-rich and formed part of the North Atlantic Igneous Province. Extrusive and intrusive magmatism was abundant on the continental side, and a thick oceanic crust was produced up ...
(Doctoral thesis / Doktoravhandling, 2011)
Ice loss from glaciers and ice caps in the Arctic constitute a major contribution to eustatic sea-level rise. Climate change is more pronounced in the Arctic than in other regions, because strong feedback mechanisms such ...
(Doctoral thesis / Doktoravhandling, 2012)
Kalde områder er svært omskiftelige og spiller en viktig rolle i den globale klimadebatten. De reagerer sensitivt selv på små klimatiske variasjoner, ettersom temperaturene fluktuerer rundt frysepunktet. Det er derfor behov ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
(Doctoral thesis / Doktoravhandling, 2022)
A climate model is an idealized representation of the Earth. Climate models are under constant improvement as they serve as tools for decision making. The land surface is the most uncertain part of the carbon cycle in ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Late Early Permian–lowermost Triassic carbonate, siliceous (spiculites) and clastic marine sediments in the Marmierfjellet area (Isfjorden, central Spitsbergen) contain a relatively diverse and abundant trace fossil ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Fresh and aged diesel soot particles have different impacts on climate and human health. While fresh diesel soot particles are highly aspherical and non-hygroscopic, aged particles are spherical and hygroscopic. Aging and ...
(Doctoral thesis / Doktoravhandling, 2014)
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
In contrast to coseismic pulverization of crystalline rocks, observations of coseismic pulverization in porous sedimentary rocks in fault damage zones are scarce. Also, juxtaposition of stiff crystalline rocks and compliant ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
In this study we assess the present-day gas hydrate stability zone for the Barents Sea and Kara Sea region. Thereby, we make use of a data-based 3D lithosphere-scale pressure and thermal model. The resulting gas hydrate ...
(Doctoral thesis / Doktoravhandling, 2011)
The velocity of glaciers is important for many aspects in glaciology. Mass accumulated in the accumulation area is transported down to the ablation area by deformation and sliding due to the gravitational force, and hence ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
Changing conditions of the climate and underlying surface have altered the rainfall-runoff relationships in many basins, greatly increasing additional challenges in the applicability of hydrological models for studying the ...
(Doctoral thesis / Doktoravhandling, 2017)
Nye metoder for å analysere laserdata fra NASA-satellitten ICESat viser hvor mye isbreer smelter, og hvor mye snø det ligger på bakken. Dette gir oss økt forståelse om forhold i områder som ellers er vanskelig tilgjengelige. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
The origin of linear features in mountain terrain that form distinct vertical steps is generally not obvious and has been discussed to be related to either tectonic faulting or gravitational slope deformation. A strong ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
In this study, we assess glacier area and length changes in mainland Norway from repeat Landsat TM/ETM+-derived inventories and digitized topographic maps. The multi-temporal glacier inventory consists of glacier outlines ...
(Doctoral thesis / Doktoravhandling, 2014)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The notorious ~60° bend separating the Hawaiian and Emperor chains marked a prominent change in the motion of the Pacific plate at ~47 Ma (million years ago), but the origin of that change remains an outstanding controversy ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
tWave form modeling is used in a vast number of applications. Therefore, different methods have beendeveloped that exhibit different strengths and weaknesses in accuracy, stability and computational cost.The latter remains ...
(Research report / Forskningsrapport, 1984)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Eikonal models have been widely used for traveltime computations in the field of seismic imaging, but they are often criticized for having low accuracy and poor resolution of the output image. Including amplitude information ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Mass loss from glaciers and ice sheets currently accounts for two-thirds of the observed global sea-level rise and has accelerated since the 1990s, coincident with strong atmospheric warming in the polar regions. Here we ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
Kronebreen and Kongsbreen are among the fastest-flowing glaciers on Svalbard and, therefore, important contributors to the total dynamic mass loss from the archipelago. Here, we present a time series of area-wide surface ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
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 ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
In this study we simulate the climatic mass bal- ance of Svalbard glaciers with a coupled atmosphere–glacier model with 3 km grid spacing, from September 2003 to September 2013. We find a mean specific net ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Mean-motion resonances play an important role in the evolution of various meteoroid streams. Previous works have studied the effects of two-body resonances in different comets and streams. These already established two-body ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
We apply a physically based coupled surface energy balance and snowpack model to a site close to the equilibrium line on Austfonna ice cap, Svalbard, over the 2004–08 melt seasons, to explain contributions to the energy ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
As part of the Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP), we evaluate the historical black carbon (BC) aerosols simulated by 8 ACCMIP models against observations including 12 ice core records, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
[1] Black carbon (BC) and other light-absorbing particles deposited on snow and ice are known to perturb the surface radiative balance. There are few published observations of the concentration of these particles in the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
With the present demand on fast and inexpensive aerosol source apportionment methods, the Aethalometer model was evaluated for a full seasonal cycle (June 2014–June 2015) at a rural atmospheric measurement station in ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The genesis of the Amerasia Basin in the Arctic Ocean has been difficult to discern due to overprint of the Cretaceous High‐Arctic Large Igneous Province (HALIP). Based on detailed analysis of bathymetry data, new Arctic ...
(Doctoral thesis / Doktoravhandling, 2015)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
Biochar addition to agricultural soils can improve soil fertility, with the added bonus of climate change mitigation through carbon sequestration. Conservation farming (CF) is precision farming, often combining minimum ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
Laboratory core flooding experiment was run to investigate the joint use of electrical resistivity, ultrasonic velocities and 3D images of fluid distribution to improve current understanding of CO2 and brine behaviour ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)
An evaluation of rock slide tsunami hazard is applied to all Norwegian lakes larger than 0.1 km2 based on their topographical setting. The analysis results in a topographic rock slide potential score that indicates the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
Debris flows, triggered by extreme precipitation events and rapid snow melt, cause considerable damage to the Norwegian infrastructure every year. To define intensity-duration (ID) thresholds for debris flow initiation ...
(Doctoral thesis / Doktoravhandling, 2020)
Modern seismic exploration for hydrocarbons in the subsurface relies on a good understanding of how different rock properties influence the remotely recorded seismic response. The bridge between the geological properties, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
At present, anthropogenic halogens and oceanic emissions of very short-lived substances (VSLSs) both contribute to the observed stratospheric ozone depletion. Emissions of the long-lived anthropogenic halogens have been ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Land-use changes until the beginning of the 20th century made the terrestrial biosphere a net source of atmospheric carbon. Later, burning of fossil fuel surpassed land use changes as the major anthropogenic source of ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Observations at surface sites show an increase in global mean surface methane (CH4) of about 180 parts per billion (ppb) (above 10 %) over the period 1984–2012. Over this period there are large fluctuations in the annual ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2015)
Satellite imagery is increasingly used to monitor glacier area changes and create glacier inventories. Robust and efficient pixel-based band ratios have proven to be accurate for automatically delineating clean glacier ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
This article focuses on the effect of dispersion in the field of tsunami modeling. Frequency dispersion in the linear long-wave limit is first briefly discussed from a theoretical point of view. A single parameter, denoted ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2006)
A method for assimilating remotely sensed snow covered area (SCA) into the snow subroutine of a grid distributed precipitation-runoff model (PRM) is presented. The PRM is assumed to simulate the snow state in each grid ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
The Larvik Plutonic Complex (LPC) contains pegmatites with a wide array of mineral assemblages and morphological features. The pegmatites have traditionally been described as nepheline syenite and syenite pegmatites which ...
(Master thesis / Masteroppgave, 2016)
This master project focuses on the mineralogical changes and re-distribution of S between apatite, monazite and scapolite in the Lindås Nappe, Bergen Arcs, W-Norway. The assemblage developed during the Sveconorwegian ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
In this paper we describe and summarize the main achievements of the European Aerosol Cloud Climate and Air Quality Interactions project (EUCAARI). EUCAARI started on 1 January 2007 and ended on 31 December 2010 leaving a ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
The first of two Sentinel-2 satellites, launched mid-2015, has similar characteristics as the Landsat TM/ETM+/OLI satellites. Together, these satellites will produce a tremendous quantity of optical images worldwide for ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
This study assessed the climate conditions that caused the tropical Zongo Glacier (16° S, Bolivia) to reach its Little Ice Age (LIA) maximum extent in the late 17th century. We carried out sensitivity analyses of the annual ...
(Doctoral thesis / Doktoravhandling, 2022)
Out of the multiple natural and anthropogenic factors affecting climate, greenhouse gases (GHGs) and aerosols from human activity dominate over the industrial era. The warming effect of the accumulating GHGs in the atmosphere ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)
A high-resolution global aerosol model (Oslo CTM2) driven by meteorological data and allowing a comparison with a variety of aerosol observations is used to simulate radiative forcing (RF) of the direct aerosol effect. The ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
The hot summer of 2007 in southeast Europe has been studied using two regional atmospheric chemistry models; WRF-Chem and EMEP MSC-W. The region was struck by three heat waves and a number of forest fire episodes, greatly ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2007)
We have used the MODIS satellite data and two global aerosol models to investigate the relationships between aerosol optical depth (AOD) and cloud parameters that may be affected by the aerosol concentration. The relationships ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Abstract Fluid flow in crystalline rocks in the absence of fractures or ductile shear zones dominantly occurs by grain boundary diffusion, as it is faster than volume diffusion. It is, however, unclear how reactive fluid ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
This paper presents an analysis of the recent tropospheric molecular hydrogen (H2) budget with a particular focus on soil uptake and European surface emissions. A variational inversion scheme is combined with observations ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
We discuss the capability of current state-of-the-art chemistry and transport models to reproduce air quality trends and interannual variability. Documenting these strengths and weaknesses on the basis of historical ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Structurally controlled, syn-rift, clastic depocentres are of economic interest as hydrocarbon reservoirs; understanding the structure of their bounding faults is of great relevance, e.g. in the assessment of fault-controlled ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)
Human activity influences a wide range of components that affect the surface UV radiation levels, among them ozone at high latitudes. We calculate the effect of human-induced changes in the surface erythemally weighted ...
(Doctoral thesis / Doktoravhandling, 2018)
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 ...
(Doctoral thesis / Doktoravhandling, 2009)
This thesis entitled “Compaction of siliceous sediments – Implications for basin modeling and seismic interpretation” has been submitted to the Department of Geosciences at the University of Oslo in agreement with the ...