Geophysical Institute: Recent submissions
Now showing items 21-40 of 1471
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On the homogeneous torsion problem for heterogeneous and orthotropic cross-sections: Theoretical and numerical aspects
(Journal article; Peer reviewed, 2024)For many years, torsion of arbitrary cross-sections has been a subject of numerous investigations from theoretical and numerical points of view. As it is well known, the resulting boundary value problem (BVP) governing ... -
On an objective, geometrically exact coupling element for a director-based multi-body finite element framework
(Journal article; Peer reviewed, 2024)In multi-body systems, flexible components and couplings between them can be subject to large displacements and rotations. This contribution presents a general objective and geometrically exact node-to-node coupling element ... -
Coastal trapped waves and tidal mixing control primary production in the tropical Angolan upwelling system
(Journal article; Peer reviewed, 2024)Eastern boundary upwelling systems are hotspots of marine life and primary production. The strength and seasonality of upwelling in these systems are usually related to local wind forcing. However, in some tropical upwelling ... -
Formulating and heuristic solving of contact problems in hybrid data-driven computational mechanics
(Journal article; Peer reviewed, 2024)In this work we consider the hybrid Data-Driven Computational Mechanics (DDCM) approach, in which a smooth constitutive manifold is reconstructed to obtain a well-behaved nonlinear optimization problem (NLP) rather than ... -
Persistent urban heat
(Journal article; Peer reviewed, 2024)Urban surface and near-surface air temperatures are known to be often higher than their rural counterparts, a phenomenon now labeled as the urban heat island effect. However, whether the elevated urban temperatures are ... -
Evaluating the Performance of Pulsed and Continous-Wave Lidar Wind Profilers with a Controlled Motion Experiment
(Journal article; Peer reviewed, 2024)While floating wind lidars provide reliable and cost-effective measurements, these measurements may be inaccurate due to the motion of the installation platforms. Prior studies have not distinguished between systematic ... -
Comment on “Resolving the Tropical Pacific/Atlantic Interaction Conundrum” by Feng Jiang et al. (2023)
(Journal article; Peer reviewed, 2024)Jiang et al. (2023), https://doi.org/10.1029/2023gl103777 argue that the apparent impact of the equatorial Atlantic on El Niño-Southern Oscillation (ENSO) is a statistical artifact, and that the 6-month lead correlation ... -
Best practices recommendations for estimating dissipation rates from shear probes
(Journal article; Peer reviewed, 2024)As a part of the Scientific Committee on Oceanographic Research (SCOR) Working Group #160 “Analyzing ocean turbulence observations to quantify mixing” (ATOMIX), we have developed recommendations on best practices for ... -
Influence of Yaw Misalignment on Wind Turbine Wakes and Power Production Under Different Atmospheric Conditions: An LES and Analytical Modeling Study
(Master thesis, 2025-02-07)As global reliance on renewable energy grows, optimizing wind farm performance has become essential for meeting sustainable energy demands. The interaction between wind turbines and the atmospheric boundary layer presents ... -
Ombygging av en ensylindret dieselmotor til dual-fuel drift på etanol
(Master thesis, 2022-07-04)Denne rapporten beskriver ombyggingsprosessen av en ensylindret dieselmotor til dual-fuel drift på etanol, og videre presenterer resultater fra utførte forsøk med etanol. Rapporten inkluderer et teoretisk nødvendig grunnlag ... -
Enhanced Harvest of Solar Energy with the Utilization of Nanofluids and Biodegradable Fluids
(Master thesis, 2022-08-15)Efficiency improvement opportunities for decarbonization of fossil fuel-dominated sectors are crucial when the energy end-use sector generating significant annual greenhouse gas emissions are attributed to heating. Given ... -
Hydrography and circulation below Fimbulisen Ice Shelf, East Antarctica, from 14 years of moored observations
(Journal article; Peer reviewed, 2024)Future mass loss from the East Antarctic Ice Sheet represents a major uncertainty in projections of future sea level rise. Recent studies have highlighted the potential vulnerability of the East Antarctic Ice Sheet to ... -
A Simple Statistical Postprocessing Scheme for Enhancing the Skill of Seasonal SST Predictions in the Tropics
(Journal article; Peer reviewed, 2024)Seasonal prediction systems are subject to systematic errors, including those introduced during the initialization procedure, that may degrade the forecast skill. Here we use a novel statistical postprocessing correction ... -
A 70-year perspective on water-mass transformation in the Greenland Sea: From thermobaric to thermal convection
(Journal article; Peer reviewed, 2024)The hydrography of the central Greenland Sea was reconstructed from observations including bottle measurements, Conductivity/ Temperature/ Depth (CTD) measurements, and Argo floats for the period 1950 to 2020. Greenland ... -
Identifying airborne snow metamorphism with stable water isotopes
(Journal article; Peer reviewed, 2024)Wind-blown snow is a frequent phenomenon in high-elevation and polar regions which impacts the surface energy and mass balance of these areas. Loose surface snow gets eroded and transported by wind, which influences the ... -
Drivers and impact of the 2021 extreme warm event in the tropical Angolan upwelling system
(Journal article; Peer reviewed, 2024)Benguela Niños are extreme warm events that typically occur during the main downwelling season (austral fall) in the tropical Angolan upwelling system when the biological productivity is low. However, the extreme warm event ... -
Impact of swell waves on atmospheric surface turbulence: wave–turbulence decomposition methods
(Journal article; Peer reviewed, 2024)To study turbulence properties, specifically vertical momentum fluxes under swell wave conditions, I investigate the impact of waves on the power spectrum and spectral coherence of turbulent wind across various spatial and ... -
Variations in Rainfall Structure of Western North Pacific Landfalling Tropical Cyclones in the Warming Climates
(Journal article; Peer reviewed, 2024)Observations and climate projections suggest a larger increase in tropical cyclone (TC)-induced rainfall than that can be explained by the Clausius-Clapeyron relationship of 7% increase in vapor content for each 1°C degree ... -
Recent Thickening of the Barents Sea Ice Cover
(Journal article; Peer reviewed, 2024)The Arctic sea ice cover has decreased rapidly over the last few decades both in extent and thickness. Here we present multi-year (2013–2022) observations of sea ice thickness in the northwestern Barents Sea based on Upward ... -
CMIP6 near-term and long-term projections of Eurasian winter cooling trend and cold extremes
(Journal article; Peer reviewed, 2024)It is well-known that climate warming increases air temperature and reduces cold extremes in the long-term. But internal variability strongly modulates the variability of temperature at mid- and- high latitudes, for example, ...