A5044603069- Wind Energy Research and Development
- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Coastal and Marine Dynamics
- Planetary Science and Exploration
- Meteorological Phenomena and Simulations
- Marine and fisheries research
- Fluid Dynamics and Turbulent Flows
- Ocean Waves and Remote Sensing
- Space Exploration and Technology
- Aerospace Engineering and Energy Systems
- Global Energy and Sustainability Research
- Marine and environmental studies
- Atmospheric and Environmental Gas Dynamics
- Water-Energy-Food Nexus Studies
- Astro and Planetary Science
- Methane Hydrates and Related Phenomena
- Scientific Research and Discoveries
- Wind and Air Flow Studies
- Tropical and Extratropical Cyclones Research
- Cavitation Phenomena in Pumps
- Space Science and Extraterrestrial Life
- Aquatic and Environmental Studies
- Geology and Paleoclimatology Research
- Aquatic Invertebrate Ecology and Behavior
Swedish Meteorological and Hydrological Institute
2020-2024
University of Gothenburg
2013-2023
The transport of gasses dissolved in surface waters across the water‐atmosphere interface is controlled by piston velocity ( k ). This coefficient has large implications for, e.g., greenhouse gas fluxes but challenging to quantify situ. At present, empirical ‐wind speed relationships from a small number studies and systems are often extrapolated without knowledge model performance. study compares estimates flux chamber water concentration measurements (chamber method), eddy cell modeling...
Tidal-stream energy resource can be predicted deterministically, provided tidal harmonics and turbine-device characteristics are known. Many turbine designs exist, all having different (e.g. rated speed), which creates uncertainty in assessment or renewable system-design decision-making. A standardised normalised tidal-stream power-density curve was parameterised with data from 14 operational horizontal-axis turbines mean cut-in speed ∼30% of speed). Applying FES2014 global (1/16° gridded...
The sensitivity of Baltic Sea salinities to changed fresh water forcing and other factors have been debated during the last decades, since would large impacts on marine ecosystems, this parameter still shows a high degree uncertainty in regional climate projections. In study we perform where at outer boundaries North are perturbed systematic way order obtain second-order Taylor polynomial statistical steady state mean salinity. is constructed based perturbations 57-year long hindcast runs...
The Orust-Tjörn fjord system is located on the west coast of Sweden and consists several fjords connected by shallow narrow straits. It home to nature reserves, harbors, leisure areas, aquaculture farms, biodiversity threatened invasive species, for example brought in through shipping. Therefore, it important understand how larvae species are dispersed currents within order find efficient methods management existing future harmful species. A connectivity study performed...
Abstract Direct numerical simulations (DNS) of free surface flows driven by natural convection are used to evaluate different methods estimating air‐water gas exchange at no‐wind conditions. These estimate the transfer velocity as a function either horizontal flow divergence surface, turbulent kinetic energy dissipation beneath heat flux through or wind speed above surface. The is modeled via passive scalar. Schmidt number dependence studied for numbers 7, 150 and 600. using divergence, well...
Abstract. The North Sea and the Baltic still experience eutrophication deoxygenation despite large international efforts to mitigate such environmental problems. Due highly different oceanographic frameworks of two seas, existing modelling have mainly focused on only one respective making it difficult study interbasin exchange mass energy. Here, we present NEMO–SCOBI, an ocean model (NEMO-Nordic) coupled Swedish Coastal Ocean Biogeochemical (SCOBI), that covers Sea, Skagerrak–Kattegat...
The Deep Green technique for tidal power generation is suitable moderate flows which attractive since larger areas energy hereby can be used. It operates typically at mid-depth and seen as a "flying" kite with turbine generator attached underneath. moves in lying figure-eight path almost perpendicular to the flow. Large eddy simulations an adaption of actuator line method (in order describe arbitrary paths) are used study turbulent flow without specific site. This methodology later studies...
Abstract Air‐water gas‐exchange is studied in direct numerical simulations (DNS) of free‐surface flows driven by natural convection and weak winds. The wind modeled as a constant surface‐shear‐stress the gas‐transfer via passive scalar. are characterized Richardson number where , buoyancy flux, kinematic viscosity, friction velocity respectively. comprise ranging from convection‐dominated to shear‐dominated cases. results used to: (i) evaluate parameterizations air‐water gas‐exchange, (ii)...
Tidal energy has the potential to provide a substantial part of sustainable electric power generation. The tidal plant developed by Minesto, called Deep Green, is novel technology using 'flying' kite with an attached turbine, moving at speed several times higher than mean flow. Multiple Green plants will eventually form arrays, which require knowledge both flow interactions between individual devices and how array influences surrounding environment. present study uses large eddy simulations...
Chemical cues and signals mediate resource acquisition, mate finding, the assessment of predation risk in marine plankton. Here, we use chemical properties first identified from zooplankton together with situ measurements turbulent dissipation rates to calculate effect turbulence on distribution behind swimmers as well steady state background concentrations surrounding water. We further show that common (copepods) appears optimize finding by aggregating at surface calm conditions when do not...
The representation of tidal energy in future renewable systems is growing. Most the current turbine designs are limited by minimum velocity required for efficient operation. Deep Green (DG) a kite-borne power plant designed to sustain operation velocities as low 1.2 ms−1. This could increase geographical areas suitable large-scale arrays. Numerical modeling was carried out previous study using large eddy simulations and actuator line method. numerical model compared with acoustic Doppler...
<p>Understanding the physical development of Gulf Bothnia is vital in estimating future area, both for humans and nature alike. </p><p>In SmartSea project we have made simulations scenarios Bothnia. We simulated a historical control period 1976-2006 with three different downscaled global circulation model forcings, use these as comparisons runs corresponding forcings years 2006-2100 RCP 4.5 8.5...
The gas flux at the water surface is affected by physical processes including turbulence from wind shear, microscale wave breaking, large-scale and convection due to heat loss surface. main route in parameterizations of has been use speed as a proxy for velocity, indirectly taking into account dependency shear processes. interest contributions increased inland waters (with typically lower sheltered conditions) now believed play substantial role air-water budget. enhanced through mixing mixed...