Browsing Geophysical Institute by Title
Now showing items 10-29 of 1437
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A Comparative Analysis of Ground Source and Air Source Heat Pumps for Heating of an Office Building in Bergen
(Master thesis, 2023-06-01) -
A Comparative Study of Different Hydrogen Delivery and Storage Systems for Industrial Applications
(Master thesis, 2024-06-03)Reducing greenhouse gas emissions is crucial to addressing global warming. In response, emission-intensive industries with significant emissions prioritize efforts to cut their greenhouse gas emissions and adapt to a ... -
A comparative study of Doubly Fed Asynchronous and Synchronous Generators in a wind energy perspective
(Master thesis, 2019-06-15)Dette masterstudiet fokuserer på analyse av vindkraft-generatorer. Det er et sammenligningsstudie av den dobbel-matede asynkrongeneratoren og synkrongeneratorer, hvor effektivitet, driftsforhold og økonomiske perspektiv ... -
A Matheuristic Algorithm for an Offshore Multi-period Location Routing Problem
(Master thesis, 2024-06-28)With the recent increase in energy production generated by offshore wind farms, regular maintenance is important for wind farm owners to ensure that they remain operational. Currently, maintenance tasks are performed by ... -
A NAWDEX case study: Water vapor transport in atmospheric rivers and quantifying hand over of moisture between extratropical cyclones
(Master thesis, 2020-10-31)Meridional water vapor transport occurs predominantly within the warm sector of extratropical cyclones. The warm sector is seperated by the cyclone's warm front ahead, and the cold front behind. In this region the warm ... -
A POD-Based Reduced Order Model for Offshore Wind Applications, using LiDAR Measurements and WRF-PALM Simulations
(Master thesis, 2022-06-03)Wind flow fields within a wind farm, including wake dynamics, are a complex system of large degrees of freedom. The wake shape and velocity deficit downstream of a turbine may be calculated using numerical modeling, such ... -
A Pore-Scale Study on Cyclic Flows in Porous Underground Hydrogen Storage
(Master thesis, 2022-06-01)A solution for energy storage is needed to balance supply and demand in future energy markets with an increased share of fluctuating renewable wind and solar energy. A key enabler is large-scale, seasonal energy storage, ... -
A Short-Term Optimization Model for Routing and Scheduling of Maintenance on Offshore Wind Farms
(Master thesis, 2024-06-03)Drift og vedlikehold bidrar til en stor del av den totale kostnaden på havvindparker. Derfor er det et mål å minimere disse kostnadene, samt maksimere produksjonen på vindparken. I denne masteroppgaven blir det presentert ... -
A Study of Wind-Wave Interactions using Offshore High-Frequency Wind and Wave Measurements
(Master thesis, 2022-06-01) -
Acidification of the Nordic Seas
(Journal article; Peer reviewed, 2022)Due to low calcium carbonate saturation states, and winter mixing that brings anthropogenic carbon to the deep ocean, the Nordic Seas and their cold-water corals are vulnerable to ocean acidification. Here, we present a ... -
Adaptive Covariance Hybridization for the Assimilation of SST Observations Within a Coupled Earth System Reanalysis
(Journal article; Peer reviewed, 2024)Ensemble data assimilation methods, such as the Ensemble Kalman Filter (EnKF), are well suited for climate reanalysis because they feature flow-dependent covariance. However, because Earth System Models are heavy ... -
Addressing the observational gap over heterogeneous land surfaces in the lower atmospheric boundary layer by multi-copter temperature and humidity profile measurements
(Master thesis, 2024-06-03)The effects of surface heterogeneity on the atmospheric boundary layer are still poorly understood and thus not appropriately parameterized in numerical weather prediction models. The complexity of types, shapes, and scales ... -
Advances in understanding and parameterization of small-scalephysical processes in the marine Arctic climate system: a review
(Peer reviewed; Journal article, 2014-09-10)The Arctic climate system includes numerous highly interactive small-scale physical processes in the atmosphere, sea ice, and ocean. During and since the International Polar Year 2007–2009, significant advances have been ... -
Advancing annual global mean surface temperature prediction to 2 months lead using physics based strategy
(Journal article; Peer reviewed, 2024)Interannual global mean surface temperature (GMST) forecast provides critical insights into the economic and societal implications of climate variability. The pronounced GMST elevation in 2023–2024 indicates that the Earth ... -
Advancing the Capabilities of Numerical Weather Prediction - On the Utility of Individual Tendency Output
(Doctoral thesis, 2022-11-18)Parametrisering i numeriske værmodeller representerer finskalaprosesser i atmosfæren på subgridnivå. Disse atmosfæriske prosessene inkluderer turbulens, stråling og dråpeformasjon i skyer. Enhver parametrisering er en ... -
Aerodynamic simulations of offshore wind turbines by using a potential flow approach
(Master thesis, 2024-06-03)This thesis explores the aerodynamic performance of floating offshore wind turbines (FOWTs) using a potential flow approach. The primary objective is to understand how the output power of an FOWT is affected by imposing different ... -
Aerodynamic study of a suspension bridge deck by CFD simulations, wind tunnel tests and full-scale observations
(Journal article; Peer reviewed, 2021)Assessing the aerodynamic characteristics of long-span bridges is fundamental for their design. Depending on the terrain complexity and local wind conditions, episodes of large angles of attack (AoA) of 15° may be observed. ... -
Air-Sea Interaction in Biophysical Modeling: With focus on Northeast Arctic Cod
(Doctoral thesis, 2019-02-15)The focus of this thesis is on upper ocean dynamics and the interactions between the atmosphere and the oceans in relation to early life stages of Northeast Arctic cod. The main spawning sites of Northeast Arctic cod are ... -
Air-Sea Interactions during Cold Air Outbreaks in a coupled Mixed Layer Model
(Master thesis, 2019-06-19)Cold air outbreaks play a crucial role in the air-sea heat exchange in high latitudes. To explore the sensitivity to ocean coupling, the role of latent heating and the sensitivity to sea ice distributions in cold air ...