Browsing Faculty of Mathematics and Natural Sciences by Title
Now showing items 3579-3598 of 9919
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The greater Agulhas Current system: an integrated study of its mesoscale variability
(Journal of Operational Oceanography, Journal article, 2008-02)For the purpose of developing an operational oceanography system for the greater Agulhas Current regime, a high resolution Hybrid Coordinate Ocean Model (HYCOM) has been set in a nested configuration. The intense and complex ... -
Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores
(Journal article; Peer reviewed, 2021)This study presents simulations of Greenland surface melt for the Eemian interglacial period (∼130 000 to 115 000 years ago) derived from regional climate simulations with a coupled surface energy balance model. Surface ... -
Greenland surface air temperature changes from 1981 to 2019 and implications for ice-sheet melt and mass-balance change
(Journal article; Peer reviewed, 2020)We provide an updated analysis of instrumental Greenland monthly temperature data to 2019, focusing mainly on coastal stations but also analysing ice‐sheet records from Swiss Camp and Summit. Significant summer (winter) ... -
Greenland-Scotland overflow studied by hydro-chemical multivariate analysis
(Peer reviewed; Journal article, 2003-01)Hydrographic, nutrient and halocarbon tracer data collected in July-August 1994 in the Norwegian Sea, the Faroe Bank Channel (FBC), the Iceland and Irminger Basins and the Iceland Sea are resented. Special attention was ... -
Grein. A New Non-Linear Cryptoprimitive
(Master thesis, 2013-12-10)In this thesis, we will study a new stream cipher, Grein, and a new cryptoprimitive used in this cipher. The second chapter gives a brief introduction to cryptography in general. The third chapter looks at stream ciphers ... -
Grenville-age continental arc magmatism and crustal evolution in central Dronning Maud Land (East Antarctica): Zircon geochronological and Hf-O isotopic evidence
(Peer reviewed; Journal article, 2020)This study focusses on the Grenville-age Maud Belt in Dronning Maud Land (DML), East Antarctica, which was located at the margin of the Proto-Kalahari Craton during the assembly of Rodinia. We present new U–Pb zircon ages ... -
Grenville–age orogeny in central Dronning Maud Land, East Antarctica: constraints from new zircon U–Pb data from Jutulsessen, Gjelsvikfjella
(Master thesis, 2020-06-24)The Mesoproterozoic Maud Belt within central Dronning Maud Land, East Antarctica, preserve important information about the tectonic setting along the eastern margin of the Kalahari Craton and is an essential key in both ... -
Grid sensitivity simulation of low salinity and polymer flooding
(Master thesis, 2015-05-31)Water flooding in a reservoir is a well- established recovery method used to maintain the reservoir pressure and to displace the oil towards the producing well. However, after water flooding there is still a substantial ... -
Grottekartlegging og strukturgeologisk påvirkning på grottedannelse sør for Reingardslivatnet, Rana.
(Master thesis, 2016-06-01)Oppgaven utgjør sammen med Stadheim (2016) første ledd i det gjenopptatte forskningsarbeidet av de grotter som er lokalisert sør for Reingardslivatnet, Rana, som i utgangspunktet har vært fredet siden 6. Januar 1967. Den ... -
Grotter og grottedannelse i Plurdalen: Et tverrsnitt, Mo i Rana.
(Master thesis, 2015-06-01)Denne hovedfagsoppgaven omhandler grotter og grottedannelse langs et tverrsnitt av Plurdalen, i Nordland. Plurdalen er en dal med tydelige fluviale trekk, hvor mangelen på U-dalprofiler kan tyde på at den glasiale erosjonen ... -
Grotters strukturelle arkitektur - studium av Aspfjordgrotten, Fauske, Nordland
(Master thesis, 2019-06-26)Dannelsen av grotter i metamorfe karbonater er avhengig av at porer eksisterer i bergmassen pre-speleogenese. Porerom i form av sprekker og forkastninger er tett knyttet opp til tektonisk aktivitet. Avhengig av spenningsregimet, ... -
Ground penetrating radar for archaeology in Western Norway: Examples from Lyse Abbey and Fana burial mound
(Master thesis, 2021-06-01)In recent years, ground penetrating radar (GPR) has been an important geophysical tool in archaeological prospecting in Norway with discoveries of high interest such as viking ships and iron age settlements. Western Norway ... -
Ground-based and Satellite Remote Sensing of Atmospheric Aerosols and Ultraviolet Solar Radiation
(Doctoral thesis, 2016-04-08)Satellite remote sensed data have been used to determine the aerosol climatology and to investigate the influence of the aerosol index (AI) on the ultraviolet (UV) index in coastal land areas in Serrekunda (13.28◦ N, 16.34◦ ... -
Ground-based measurements of total ozone column amount with a multichannel moderate-bandwidth filter instrument at the Troll research station, Antarctica
(Journal article; Peer reviewed, 2020)Combining information from several channels of the Norwegian Institute for Air Research (NILU-UV) irradiance meter, one may determine the total ozone column (TOC) amount. A NILU-UV instrument has been deployed and operated ... -
Grounding Performance under Lightning Surges in High Voltage Substations
(Master thesis, 2018-06-16)To achieve electromagnetic compatibility (EMC) and sufficient protection against lighting transients in the power transmission system, understanding of the grounding system transient behavior becomes crucial when deviating ... -
Groundwater fluctuations during a debris flow event in western Norway - Triggered by rain and snowmelt
(Journal article; Peer reviewed, 2021)Pore pressure is crucial in triggering debris slides and flows. Here we present measurements of groundwater pore pressure and temperature recorded by a piezometer 1.6 m below the surface on a slope susceptible to debris ... -
Growing Ice in a Tank: Young Sea Ice Evolution and Turbulence in the Under Ice Boundary Layer
(Master thesis, 2011-11-14)Thin sea ice and its modifications of the oceanic boundary layer are important in the context of the recent retreat of the Arctic sea ice cover. To study turbulence in the under ice boundary layer during thin sea ice growth, ... -
Growth and competition in a warmer ocean: a field experiment with a non-native and two native habitat-building seaweeds
(Peer reviewed; Journal article, 2017-06-21)Kelps and fucoids are important members of temperate seaweed communities, but may be negatively impacted by climate change and non-native species. We used a field experiment to investigate the effect of higher temperatures ... -
Growth and diel vertical migration patterns of the toxic dinoflagellate Protoceratium reticulatum in a water column with salinity stratification: the role of bioconvection and light
(Peer reviewed; Journal article, 2015-11-12)Novel data on growth and migratory behaviour of a southern Norwegian strain of Protoceratium reticulatum (Dinophyceae) were obtained from long-lasting (14-22 d) experiments in a water column with salinity gradient (ΔS = 4 ... -
Growth and energy metabolism in Atlantic salmon (Salmo salar), with possible positive effects of starvation at elevated temperature
(Master thesis, 2014-02-25)Due to global warming, the sea water temperature will probably increase, which may affect cold- water species like Atlantic salmon. It is therefore of great importance to see how elevated temperature will affect the growth ...