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Now showing items 501-600 of 2333
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Contemporary optical remote sensing satellites or constellations of satellites can acquire imagery at sub-weekly or even daily timescales. These systems have the potential to facilitate intra-seasonal, short-term surface ...
Sammenheng mellom regionale hydrometeorologiske forhold og poretrykk mht. utløsning av løsmasseskred
(Master thesis / Masteroppgave, 2019)
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 ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
We present a unique time series of continuous glacier frontal ablation rates with weekly resolution over 15 years estimated from seismic calving observations at Kronebreen, Svalbard. Using linear statistical models, we ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
When Earth observation satellite systems are designed, one typically prefers a sun-synchronous orbit. However, the first generations of cubesats from Planet were deployed out of the International Space Station (ISS) and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
A layer of debris cover often accumulates across the surface of glaciers in active mountain ranges with exceptionally steep terrain, such as the Andes, Himalaya, and New Zealand Alps. Such a supraglacial debris layer has ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Acquiring data to analyse change in topography is often a costly endeavour requiring either extensive, potentially risky, fieldwork and/or expensive equipment or commercial data. Bringing the cost down while keeping the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Shrub expansion in high latitudes is a widely observed response to climate change. Extensive evidence has shown that shrub expansion can lead to positive feedbacks to the regional climate. In this study we evaluate the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Remotely-sensed climate data records (CDRs) provide a basis for spatially distributed global climate model (GCM) inputs and validation methods. GCMs can take advantage of land surface models (LSMs), which aim to resolve ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Dynamic glacier activity is increasingly observed through passive seismic monitoring. We analysed near-regional-scale seismicity on the Arctic archipelago of Svalbard to identify seismic icequake signals and to study their ...
(Doctoral thesis / Doktoravhandling, 2020)
Siliciclastic sandstones constitute important reservoirs for subsurface storage of water, oil and natural gas. Knowledge of the geological processes enhancing or reducing the key reservoir properties – porosity and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
In this paper, a process‐based analytical derivation approach is proposed to perform a nonstationary analysis for annual runoff distribution by taking into account the information of nonstationarities in both hydrological ...
(Research report / Forskningsrapport, 1984)
(Doctoral thesis / Doktoravhandling, 2020)
(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, 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 ...
(Research report / Forskningsrapport, 1977)
There is a good correlation between the transport and the wind when they are represented by harmonic functions. A model of zero deflection and linear relation between wind and transport seems to be reasonable. The variation ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Statistical downscaling is useful for managing scale and resolution problems in outputs from global climate models (GCMs) for climate change impact studies. To improve downscaling of precipitation occurrence, this study ...
(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 ...
(Research report / Forskningsrapport, 1979)
(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 / Hovedoppgave, 2007)
Formålet med oppgaven har vært å finne ut hvorvidt topografiske parametre kan gi et nyttig bidrag til vegetasjonskartleggingen i norske fjellandskap. Det har vært forsøkt å finne ut om vegetasjonsmønsteret styres av ...
(Master thesis / Masteroppgave, 2007)
Clouds cover about 70% of the earth. In 1983 the world first satellite program, called International Satellite Cloud Climatology Project (ISCCP), was established. ISCCP use geostationary and polar orbiting satellites to ...
(Master thesis / Hovedoppgave, 2008)
Abstract
Velocity anisotropy referse the directional inequality of velocity on the subsurface. Often sedimentary rocks are anisotropic and occurse at all scales from core plugs to reservoirs. In this thesis velocity ...
(Master thesis / Hovedoppgave, 2004)
Store deler av Svalbard var i tidsrommet sen trias mellom jura en grunn shelf med kondensert sedimentasjon. Knorringfjellformasjonen representerer avsetningene fra denne perioden i sentrale deler av Spitsbergen. Vekslende ...
(Master thesis / Hovedoppgave, 2004)
Abstract
This thesis is written as a part of the Cand. Scient. degree at the Institute for Geosciences at the University of Oslo.
Traditionally, age determinations of late Cretaceous chalks in the Central Graben in the ...
(Master thesis / Masteroppgave, 2007)
Glaciers and ice masses are very important components of the earth system both in terms of global water storage and as climate indicators. The amount of water tied up in glaciers and ice caps is equivalent to about 69 ...
(Master thesis / Hovedoppgave, 2003)
To learn more about the fluids that were present in the Canary Islands oceanic crust during the magmatism, fluid inclusions in gabbroic xenoliths from Lanzarote and La Palma have been studied. The fluids were originally ...
(Master thesis / Masteroppgave, 2006)
Well log derived data and geotechnical core measurement results have been compared.
(Master thesis / Hovedoppgave, 2007)
Gråelva ligger i Nord-Trøndelag fylke, Stjørdal kommune. Feltarealet er på 47 km2 ved målestasjonen 124.15 Børstad. Gråelva renner gjennom Skjelstadmarka, et område med store kjente forekomster av kvikkleire. Gråelva har ...
(Master thesis / Masteroppgave, 2008)
As global warming causes both glaciers and sea ice to decay, increased freshwater flux into the North Atlantic is expected. In addition precipitation at high latitudes is predicted to increase under global warming as well, ...
(Master thesis / Masteroppgave, 2008)
Snøskred er en av de største naturfarene i Norge, og varsling av snøskredfare er viktig for å unngå skader på mennesker, bygninger og infrastruktur. Denne studiens formål var å vise hvordan romlige analyser ved hjelp av ...
(Master thesis / Hovedoppgave, 2005)
In spite of increasing surface temperatures, a falling trend in surface insolation has been observed over the past 50 years at stations worldwide, and a link to anthropogenic aerosols has been suggested. In the present ...
(Master thesis / Masteroppgave, 2007)
TBT has been widely used for decades as the dominant composition of antifouling paints. The toxicity of TBT on aquatic life is very serious and many studies have shown that TBT can be lethal to aquatic organisms at quite ...
(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 / Hovedoppgave, 2004)
(Master thesis / Hovedoppgave, 2005)
Nordre Rena er gjennom de siste hundre åra utsatt for betydelige inngrep. Dette omfattet bl.a. erosjonssikring, forbygning, senkning, utretting og kanalisering. Målet i denne oppgava er å finne ut om elva er i likevekt, ...
(Master thesis / Masteroppgave, 2007)
(Master thesis / Hovedoppgave, 2005)
Målet for oppgaven var å lage en distribuert graddagsmodell for Høganesbreen og Gruvefonna ved Sveagruva på Svalbard. Deretter ville man undersøke om høydeendringen på breene kunne forklares av akkumulasjon og ablasjon, ...
(Master thesis / Hovedoppgave, 2005)
Aerosols may affect the atmosphere and climate
in different ways. Greenhouse gases, Carbondioxide for instance,
tend to heat the atmosphere because of the greenhouse effect. Aerosol particles however such as sulphat, can ...
(Master thesis / Masteroppgave, 2005)
The aim of this study is to compare oils from known biodegraded fields offshore Norway to waxes and oils from an artificial cavern storage facility, to determine if the oil degradation processes observed in natural reservoirs ...
(Master thesis / Masteroppgave, 2008)
Subsurface storage of carbon dioxide is often considered one of the most promising ways of reducing atmospheric levels of CO2. The safety of the operation is closely related to the performance of caprocks overlying the ...
(Master thesis / Masteroppgave, 2006)
There have been many opinions on the definition of solifluction since the expression was first used by J. G. Andersson in 1906. The original definition was “slow flowing from higher to lower ground of masses of waste ...
(Master thesis / Masteroppgave, 2008)
(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, 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 / 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 / Hovedoppgave, 2003)
Abstract
This work focuses on the two towns most exposed for flooding in Norway: Lillestrøm which lies alongside Lake Øyeren, and Hamar which is situated near Norway’s largest lake, Mjøsa. The main objective of this work ...
(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, 2006)
The Barents Sea has experienced several different tectonic phases where three major post-Caledonian rifting periods can be identified, namely Late Devonian Carboniferous, Middle Jurassic Early Cretaceous, and Early Tertiary. ...
(Master thesis / Hovedoppgave, 2004)
English abstract
This thesis was written on the purpose of identifying and characterising a hydrothermal vent complex, associated with sill complexes at lower stratigraphic levels. The studied hydrothermal vent complex, ...
(Master thesis / Hovedoppgave, 2007)
Debris flows in the Venezuelan Andes are common geomorphologic processes that reflect the sediment supply capacity of this regional mountain system. In this study a regional model for potential debris flows on soil and ...
(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)
Abstract
Debris flows represent a major threat to human life and property. Due to their ability of entraining material and reaching long run-outs, they have a potential of causing massive damage.
There are many studies ...
(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 ...
(Master thesis / Hovedoppgave, 2007)
Formålet ved undersøkelsen i Ottadalen, som strekker seg fra Otta til Skjåk, er å undersøke når området ble isfritt, og å beskrive den tidlige vegetasjonsutviklingen etter at isen forsvant. Dette gjelder både vertikalt og ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
We use numerical simulations to investigate the evolution of sheath folds around slip surfaces in simple‐shear‐dominated monoclinic shear zones. A variety of sheath fold shapes develops under general shear, including tubular ...
(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 / 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, 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, 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)
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, 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 / 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, 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 ...
(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 ...
(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, 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 / Hovedoppgave, 2007)
Estimation of extreme floods, based on statistical analyses of observed values of flood series, is associated with several problems leading to high uncertainty in the flood estimates. In particular is this related to the ...
(Master thesis / Masteroppgave, 2010)
A succession of crater infill sediments is preserved within the Ritland impact structure. Ritland is good example of a small depositional basin where a range of processes from debris flows to turbiditic currents and finally ...
(Master thesis / Masteroppgave, 2008)
Fordampningsberegninger for Aursunden (690m.o.h.), Sør-Trøndelag, er utført for fordampningssesongen 2000. Instrumenteringen inkluderte en flåte med en metrologisk stasjon, en metrologisk stasjon nær sjøen, kontinuerlige ...
(Master thesis / Masteroppgave, 2007)
Diatom analyses were carried out on two sediment cores, one from the North Labrador Sea and one from Davis Strait, West Greenland, in order to investigate Holocene climatic variability in relation to ocean circulation. ...
(Master thesis / Hovedoppgave, 2007)
Sammendrag
Flom påfører i dag samfunnet store økonomiske tap. For å kunne forebygge og begrense disse skadene mest mulig er et godt analyseverktøy nødvendig. Slik at man f.eks. unngår å bygge eller tilpasser bygg på ...
(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 / Masteroppgave, 2007)
Abstract
The study was mainly focused on the development of the Late Cenozoic shelf outbuilding in the northern North Sea and offshore mid-Norway. Principles of seismic sequence stratigraphy were applied as a tool to ...
(Master thesis / Hovedoppgave, 2005)
Abstract
The Goliath discovery which occurs proximal in he Hammerfest Basin is particular for its size and it contents of oil, whilst other traps in the Hammerfest Basin are largely containing gas/condensate and generally ...
(Master thesis / Hovedoppgave, 2005)
Vassdragene er en verdifull ressurs for mange ulike brukerinteresser, og utgjør livsnerven i en mangfoldig vassdragsnatur. Å forvalte Norges særegne vassdragsmiljø, er en kompleks og utfordrene oppgave som innebærer bred ...
(Master thesis / Hovedoppgave, 2004)
The 40 km diameter Mjølnir Crater was formed 142 ± 2.6 Ma (Volgian-Ryazanian boundary) by the impact of a 1.6 km diameter asteroid into the 350-400 m deep paleo-Barents Sea. The structure is buried and well preserved in ...
(Master thesis / Hovedoppgave, 2007)
I denne oppgaven undersøkes mulighetene for å bruke satellittfjernanalyse til kartlegging av snøskred som har gått.
Det gjøres en teoretisk kartlegging av aktuelle metoder. Ulike sensortyper og deres egnethet for formålet ...
(Master thesis / Hovedoppgave, 2005)
Denne oppgaven er et forsøk på å relatere isbreers masse- og energibalanse ved å studere kuldemagasinets innvirkning på smeltinga. Data ble samlet inn fra Austfonna (8105 km2) våren 2004 og 2005. Massebalansedata herfra ...
(Master thesis / Masteroppgave, 2008)
Hygroskopiske aerosolpartikler sveller i fuktige omgivelser. Ammoniumsulfat er et eksempel på en hygroskopisk aerosolpartikkel, og den sveller ikke-lineært ved relativ fuktighet over 81%. Svelling øker den optiske tykkelsen ...
(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, 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 / Hovedoppgave, 2005)
Store fjellskred har ført til noen av de verste naturkatastrofene vi kjenner til i Norge. International Centre for Geohazards (ICG) har funnet flere lokaliteter i Møre og Romsdal, Sogn og Fjorande og Troms-fylke som ...
(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 / Hovedoppgave, 2007)
Dagsjøen ligger 163 meter over havet, og er en av 28 grytehullsjøer som ligger på Hauersetertrinnet (Gardermoen) i Ullensaker kommune, Akershus fylke. Hauersetertrinnet ble dannet da det sen-weichelske isdekket hadde et ...
(Master thesis / Masteroppgave, 2006)
The South Atlantic rift system developed during the Mesozoic breakup of Africa and South America. These continental masses belonged to the Gondwana Palaeozoic super-continent.
Rifting started in the south, and propagated ...
(Master thesis / Masteroppgave, 2006)
I denne oppgaven brukes ArcGIS, ArcSDE og Oracle Spatial for å implementere
et distribuert system for lagring av geografisk data ved Universitetet i Oslo. Den
geografiske informasjonen er lagret i såkalt SOSIformat.
Den ...
(Master thesis / Masteroppgave, 2008)
Abstract
The effect of tropospheric ozone as an air pollutant is normally simulated using regional or urban scale computer models, while global models often are used to study the role of ozone as a greenhouse gas. The ...
(Master thesis / Masteroppgave, 2008)
Abstract
A two-layer system with a deep lower layer in a semi-infinite ocean is investigated theoretically. Tidal forcing is applied, and expressions for an internal Kelvin wave are derived. Terms of second order in wave ...