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norskMastergradsoppgaver i teknologi - energi, klima og miljø: Recent submissions
Now showing items 41-60 of 133
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Assessment of the Remaining Carbon Budget: Incorporating Arctic Amplification in a Simple Response Model
(Master thesis; Mastergradsoppgave, 2020-06-15)Remaining carbon budgets (RCBs) quantify the total amount of CO2 that can still be emitted into the atmosphere while keeping the global mean surface temperature below a specific target. However, there is significant uncertainty in RCBs estimates. This thesis develops a Simple Response Model (SRM) to explore the uncertainties in RCBs. We use temperature response functions estimated from multi-box ... -
Assessment of the Remaining Carbon Budget: Incorporation of Nonlinear Feedbacks in a Simple Response Model
(Master thesis; Mastergradsoppgave, 2020-06-15)Anthropogenic emission of greenhouse gases is causing an unbalance in the Earth’s climate system, leading to global climate change. The implications of these changes are dramatic, with a need for a global-scale assessment. The remaining carbon budget (RCB) is a measure of the amount of greenhouse gasses (GHGs) that can be emitted if we are to reach a specific temperature target. Traditionally, carbon ... -
Evaluation of a Solar Power Plant at Longyearbyen
(Master thesis; Mastergradsoppgave, 2020-06-15)The world faces one of the greatest challenges by changing the economy in a direction where higher resource productivity and lower greenhouse gas emis- sions are the main focus. The most prominent solution to reduce green house gases is a greater utilisation of renewable energy sources. With a rapid tech- nological advancement, solar energy is now one of the least expensive forms of power in two ... -
Assessment of the Remaining Carbon Budget: A Comparison of a Simple Response Model and the MAGICC Model.
(Master thesis; Mastergradsoppgave, 2020-06-15)We are changing the global climate by altering the Earths energy balance through the emission of greenhouse gasses. The international community aims to prevent dangerous warming with mitigative efforts. A remaining carbon budget (RCB) can roughly quantify an allowable amount of emissions for keeping the temperature below a set target. We have built a simple climate model using impulse response ... -
Automatic validation of Sentinel-1 borne snow avalanche detections
(Master thesis; Mastergradsoppgave, 2020-05-30)Snow avalanches threaten human lives, settlements and roads in snow covered mountainous areas. For avalanche forecasting, knowledge of the spatio-temporal occurrence of avalanche activity is critical. Automatic avalanche detection algorithms have been developed to enable consistent avalanche activity monitoring for large regions. The Satskred avalanche detection algorithm developed by NORCE applies ... -
Analyse av energibruk og teknisk drift ved Bryne videregående skole
(Master thesis; Mastergradsoppgave, 2019-12-15)Tidligere Bryne videregående skole (vgs.) og Time vgs. ble i 2015 slått sammen til nye Bryne vgs. I den anledning ble det bygget tre nye skolebygg med et moderne og komplekst energisystem. Skolen er et pilotprosjekt i tråd med Rogaland fylkeskommune sin miljøpolitikk og er bygget med fokus på bærekraftige prinsipper, lavt energiforbruk og bruk av energikilder med begrenset CO2 utslipp. Skolens varme ... -
Wind resource assessment using weather research and forecasting model. A case study of the wind resources at Havøygavlen wind farm
(Master thesis; Mastergradsoppgave, 2019-12-13)The need for energy increases globally due to rapid expansion of population and prosperity. To meet this demand while decreasing carbon emission and eventually transition out fossil fuel, efficient utilization of wind power is prominent. This study evaluates the performance of the Weather Research and Forecast model (WRF) with respect to wind speed and wind direction. The area of the study is ... -
Short-term wind power prediction models in complex terrain based on statistical time series analysis
(Master thesis; Mastergradsoppgave, 2019-12-13)One of the largest challenges with the utilization of wind as a renewable resource, is its natural variability and intermittent nature. To achieve a sustainable integration of wind power into the power grid, a precise and reliable prediction method is therefore required. In this study, several short-term wind power prediction models based on statistical time series analysis were developed and tested, ... -
Decentralized wind power as part of the relief for an overstrained grid. A case study on Northern Senja, Norway
(Master thesis; Mastergradsoppgave, 2019-08-12)The most significant factor in wind turbine siting is the wind conditions. Those often determine the economic and ecologic success of a project. Especially in topographically complex areas micro siting can be difficult and costly. Small and medium scale projects often lack the knowledge and resources for an extended in situ assessment. A combination of modelled wind data and the use of a geographic ... -
Estimation of power supply by renewable energy sources to a weather station at Nordlysobservatoriet, Alta
(Master thesis; Mastergradsoppgave, 2019-08-05)For a weather station that will be set up at Halddetoppen, Alta, there will also be installed a hybrid renewable energy system, to supply the station with power. This thesis simulated and estimated the hybrid system as it was planned, to see if it would be enough to give steady supply for the weather station. Different set-ups for the hybrid system was investigated. The set-ups differed in mounting ... -
Investigation of Photovoltaic Energy Yield on Tromsøya by Mapping Solar Potential in ArcGIS
(Master thesis; Mastergradsoppgave, 2019-06-13)To contribute to the reduction of greenhouse gas emissions, energy production from renewable energy resources should be markedly increased to supply the rising global energy demand (Marchant, 2018). This thesis investigates the solar energy potential in Tromsø which is used as a basis for estimating total energy yield from photovoltaic (PV) systems on rooftops. The energy yield is compared against ... -
Isdynamikk i tre mindre fjord-trausystemer langs Finnmarkskysten
(Master thesis; Mastergradsoppgave, 2019-07-01)Multistråle batymetriske data og seismiske profiler fra den vestlige kysten av Finnmark er analysert med formålet om å rekonstruere dynamikken til det Fennoskandiske Isdekket gjennom siste glasiale maksimum, og påfølgende deglasiasjon. Fokuset har vært på tre prograderende kiler i forlengelsen av de glasiale trauene Rolvsøy-, Hjelmsøy- og Måsøytrauet. En seismisk stratigrafi er definert med tre ... -
Distributed Renewable Generation and Power Flow Control to Improve Power Quality at Northern Senja, Norway
(Master thesis; Mastergradsoppgave, 2019-06-01)Distributed renewable generation and power flow control are promising tech- nologies for increasing power system efficiency. Renewable energy production close to consumption reduces need for transport of power to these locations. The benefits of reactive flow control are well documented, and in recent years the use of energy storage for active power control has increased in relevance. The power ... -
Role of hafnium doping concentration on the structural and surface properties of ZnO surfaces
(Master thesis; Mastergradsoppgave, 2019-05-31)The presented thesis deals with the characterisation of hafnium doped zinc oxides with focus on the application as transparent conducting film (TCF) or electron transport layer (ETL) in heterojunction solar cells. Atomic force microscopy (AFM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), electrical and optical methods have been applied to characterise the examined ... -
Ice-water Classification in the Barents Sea from Sentinel-1 EW SLC Images
(Master thesis; Mastergradsoppgave, 2019-05-31)The focus of this thesis is to do ice-water classification on Sentinel-1 EW SLC imagery using an unsupervised Mixture of Gaussian segmentation algorithm. The classes are automatically labelled as sea ice or water based on the slope of the observed brightness decay from near- to far-range, which is different for sea ice and water. The aim of the thesis is twofold. In the first part, the ability of ... -
On the relationship between global mean temperature in historical runs of Earth system models and equilibrium climate sensitivity
(Master thesis; Mastergradsoppgave, 2019-05-31)Equilibrium climate sensitivity (ECS) measures the long-term global surface temperature response due to a doubling of CO2 in the atmosphere. Estimates of ECS is not well constrained, 1.5-4.5C [Pachauri et al., 2014], and there is a wide spread between different Earth system models (ESMs). Recently it has been suggested that ECS can be constrained using an observed relationship between the statistical ... -
Target Decomposition of Quad-Polarimetric SAR Images as an Unmixing Problem
(Master thesis; Mastergradsoppgave, 2019-05-31)Classic target decomposition methods use scattering space in their approaches. However, the goal for this project is to investigate whether a different approach to retrieve accurate and reliable estimates on the earth composition is possible when using the feature space with covariance matrix-based features. The approach consists of four steps. Generating multidimensional feature space data from ... -
Forbedret tilstandsovervåkning av bærelager i Sjona kraftverk ved digitalisering
(Master thesis; Mastergradsoppgave, 2019-06-01)Økt konkurranse fra andre fornybare energikilder, økt energibehov og økt behov for reguleringsevne stiller stadig større krav til eksisterende og nye vannkraftverk. Vannkraftsektoren har de siste hundre årene ikke opplevd reell konkurranse fra andre teknologier her til lands, og har derfor ikke blitt tvunget til innovasjon og nytenking i samme grad som andre deler av kraftnæringen. De siste årene ... -
Remote Sensing of Coastal Waters
(Master thesis; Mastergradsoppgave, 2019-03-01)The coastal areas outside Lofoten, Vesterålen and Senja, in the northern Norwegian coast, are known for their incredible nature, majestic mountains and unique fishing communities. This coastal area is known for high marine productivity and an important marine environment, being the home for valuable fish stocks including pollock, haddock, herring and cod. To study the characteristics of coastal ... -
Evaluation of Speckle Variance, Higher Moments and Their Dependence on Incidence Angle.
(Master thesis; Mastergradsoppgave, 2018-12-14)This thesis investigates speckle properties from Sentinel-1 GRDM data to explore its dependency of incidence angle. The data is processed using the SNAP-tool such that a uniform region can be selected and estimation of speckle variance, skewness and kurtosis can be carried out. These speckle properties are calculated over ocean and sea ice for comparison and modeled to fit a regression line. Hypothesis ...
