Browsing Institutt for geofag by Title
Now showing items 520-539 of 2342
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(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 ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)The renowned Festningen section in the outer part of Isfjorden, western Spitsbergen, offers a c. 7 km-long nearly continuous stratigraphic section of Lower Carboniferous to Cenozoic strata, spanning nearly 300 million years ...
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(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 ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)We present a summary of two round-table discussions held during two subsequent workshops in Montreal (Canada) on 16 April 2014 and Ostend (Belgium) on 8 July 2015. Five species of the genus Achomosphaera Evitt 1963 Evitt ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)The Indo-Gangetic Plain (IGP) is one of the main wheat-production regions in India and the world. With climate change, wheat yields in this region will be affected through changes in temperature and precipitation and ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)Recent increases in industrial activity have resulted in elevated chromium (Cr) pollution in the natural environment, from the degradation of concrete and the leakage of water from landfills or mine waste. The release of ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)We report in situ structural measurements of shock‐compressed single crystal orthoenstatite up to 337 ± 55 GPa on the Hugoniot, obtained by coupling ultrafast X‐ray diffraction to laser‐driven shock compression. Shock ...
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Direct oceanic emissions unlikely to account for the missing source of atmospheric carbonyl sulfide (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)The climate active trace-gas carbonyl sulfide (OCS) is the most abundant sulfur gas in the atmosphere. A missing source in its atmospheric budget is currently suggested, resulting from an upward revision of the vegetation ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)We process seismic broad-band data from southern Norway by cross correlation of ambient seismic noise in view of getting a better image of the crustal structure in the area. The main data set sterns from the temporary ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)Thermogenic dry gas flowed from Jurassic sections in the DH5R research well drilled onshore in Adventdalen, central Spitsbergen, Arctic Norway. The DH5R gas originates from the organic-rich units of the mudstone-dominated ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Small bodies of mantle-derived peridotites and other ultramafic rocks are commonly found in exhumed lower crustal units of collisional orogens. They provide a direct record of the complex evolution of the upper mantle ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)Periods of dimming and brightening have been recorded in observational datasets of surface solar radiation (SSR) between the mid-20th century and present day. Atmospheric components affect SSR, including aerosols and clouds, ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Net Ecosystem Production (NEP) of forests is the net carbon dioxide (CO2) fluxes between land and the atmosphere due to forests' biogeochemical processes. NEP varies with natural drivers such as precipitation, air temperature, ...
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Disentangling the microphysical effects of fire particles on convective clouds through a case study (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)Aerosol emissions from forest fires may impact cloud droplet activation through an increase in particle number concentrations (“the number effect”) and also through a decrease in the hygroscopicity κ of the entire aerosol ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2016)Most changes in mineralogy, density, and rheology of the Earth's lithosphere take place by metamorphism, whereby rocks evolve through interactions between minerals and fluids. These changes are coupled with geodynamic ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)We present observations of the disintegrating long-period comet C/2019 J2 (Palomar), taken to determine the nature of the object and the cause of its demise. The data are consistent with the break-up of a sub-kilometer ...
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(Doctoral thesis / Doktoravhandling, 2010)This thesis is concerned with the evaluation and development of models related to the emissions and dispersion of traffic induced road dust. Road traffic is a highly important source of a range of pollutants having adverse ...
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(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 ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Abstract The production of metal via the iron disproportionation reaction in the deep Earth has been a long debated topic with important implications for the geochemistry of the lower mantle. To explore the occurrence of ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)We provide a detailed 3D characterization of the geometry evolution and dissolution rate mapping at the surface of four carbonate samples, namely a calcite spar crystal, two limestone rock fragments, and an aragonite ooid, ...