Blar i Bergen Open Research Archive på forfatter "Reuder, Joachim"
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Potential and challenges of wind measurements using met-masts in complex topography for bridge design: Part II – Spectral flow characteristics
Zakari, Aoudou Midjiyawa; Cheynet, Etienne; Reuder, Joachim; Ágústsson, Hálfdán; Kvamsdal, Trond (Journal article; Peer reviewed, 2021)This study quantifies the influence of the local topography on sonic anemometer measurements mounted on tall met-masts deployed in Norwegian fjords. This assessment is done by analysing the second-order structure of ... -
Potential and limitations in estimating sensible-heat-flux profiles from consecutive temperature profiles using remotely-piloted aircraft systems
Båserud, Line; Reuder, Joachim; Jonassen, Marius Opsanger; Bonin, Timothy; Chilson, Phillip B.; Jiménez, Maria A.; Durand, Pierre (Peer reviewed; Journal article, 2020)Profiles of the sensible heat flux are key to understanding atmospheric-boundary-layer (ABL) structure and development. Based on temperature profiling by a remotely-piloted aircraft system (RPAS), the Small Unmanned ... -
Preliminary results of the NORCOWE Direct Covariance Flux System for Ship based measurements
Flügge, Martin; Reuder, Joachim (Peer reviewed; Journal article, 2013)To cover the increased demand of renewable energy the development of offshore wind turbines that can be placed in deep water has started. Model results from Sullivan et al. [2] indicate that the ocean has the ability to ... -
Processing of sonic anemometer measurements for offshore wind turbine applications
Nybø, Astrid; Nielsen, Finn Gunnar; Reuder, Joachim (Peer reviewed; Journal article, 2019)Quality assured measurements from offshore masts may provide valuable information of the characteristics of the offshore wind field, which is of high relevance for simulations of offshore wind turbines' dynamic response. ... -
Proof of concept for turbulence measurements with the RPAS SUMO during the BLLAST campaign
Båserud, Line; Reuder, Joachim; Jonassen, Marius Opsanger; Kral, Stephan; Bakhoday Paskyabi, Mostafa; Lothon, Marie (Peer reviewed; Journal article, 2016-10-06)The micro-RPAS (remotely piloted aircraft system) SUMO (Small Unmanned Meteorological Observer) equipped with a five-hole-probe (5HP) system for turbulent flow measurements was operated in 49 flight missions during the ... -
Proof of concept for wind turbine wake investigations with the RPAS SUMO
Reuder, Joachim; Båserud, Line; Kral, Stephan; Kumer, Valerie-Marie; Wagenaar, Jan Willem; Knauer, Andreas (Peer reviewed; Journal article, 2016-09)The Small Unmanned Meteorological Observer (SUMO) has been operated in the vicinity of five research turbines of the Energy Research Centre of the Netherlands (ECN) at the test site Wieringermeer. The intention of the ... -
Quantifying the Stable Water Isotopologue Exchange Between the Snow Surface and Lower Atmosphere by Direct Flux Measurements
Wahl, Sonja; Steen-Larsen, Hans Christian; Reuder, Joachim; Hörhold, Maria (Journal article; Peer reviewed, 2021)Surface processes in high latitudes play an important role in global climate and thus understanding the physics of these systems is critical for improving climate projections. The characterization of the stable water ... -
Recommendation on use of wind lidars
Reuder, Joachim; Cheynet, Etienne; Clifton, Andrew; van Dooren, Marijn Floris; Gottschall, Julia; Jakobsen, Jasna Bogunovic; Mann, Jakob; Palma, Jose; Schlipf, David; Sjøholm, Mikael; Trujillo, Juan-Jose; Thobois, Ludovic; Würth, Ines; Zasso, Alberto (Research report, 2021) -
Scaling the decay of turbulence kinetic energy in the free-convective boundary layer
El Guernaoui, Omar; Reuder, Joachim; Ezau, Igor; Wolf, Tobias; Maronga, Bjørn (Peer reviewed; Journal article, 2019)We investigate the scaling for decaying turbulence kinetic energy(TKE) in the free-convective boundary layer, from the time the surface heat flux starts decaying, until a few hours after it has vanished. We conduct a set ... -
Self-nested large-eddy simulations in PALM model system v21.10 for offshore wind prediction under different atmospheric stability conditions
Krutova, Maria; Bakhoday Paskyabi, Mostafa; Reuder, Joachim; Nielsen, Finn Gunnar (Journal article; Peer reviewed, 2023)Large-eddy simulation (LES) resolves large-scale turbulence directly and parametrizes small-scale turbulence. Resolving micro-scale turbulence, e.g., in wind turbine wakes, requires both a sufficiently small grid spacing ... -
Sensor movement correction for direct turbulence measurements in the marine atmospheric boundary layer
Flügge, Martin; Reuder, Joachim; Edson, James (Peer reviewed; Journal article, 2012)Understanding of the turbulent exchange processes between the ocean and the overlying atmosphere is essential for wind shear and turbulence structure of the Marine Atmospheric Boundary Layer (MABL). This is highly relevant ... -
A Ship-Based Characterization of Coherent Boundary-Layer Structures Over the Lifecycle of a Marine Cold-Air Outbreak
Duscha, Christiane Anabell; Barrell, Christopher; Renfrew, Ian A.; Brooks, Ian M.; Sodemann, Harald; Reuder, Joachim (Journal article; Peer reviewed, 2022)Convective coherent structures shape the atmospheric boundary layer over the lifecycle of marine cold-air outbreaks (CAOs). Aircraft measurements have been used to characterize such structures in past CAOs. Yet, aircraft ... -
Simulations of the Bergen orographic wind shelter
Jonassen, Marius Opsanger; Ólafsson, Haraldur; Valved, Aslaug Skålevik; Reuder, Joachim; Olseth, Jan Asle (Peer reviewed; Journal article, 2013-10-10)Even though the coast of western Norway is very windy, the centre of Bergen is rather calm. To gain further understanding of this wind shelter, we study the flow in the complex topography of Bergen during two south-westerly ... -
Statistic and coherence response of ship-based lidar observations to motion compensation
Duscha, Christiane; Bakhoday Paskyabi, Mostafa; Reuder, Joachim (Journal article; Peer reviewed, 2020)Ship-based profiling Lidar systems experience a strong influence of rotational and translational motion on beam direction and hence the line-of-sight velocity. This motion error is inherited by the retrieved 3-dimensional ... -
Turbulent kinetic energy estimates from profiling wind LiDAR measurements and their potential for wind energy applications
Kumer, Valerie-Marie; Reuder, Joachim; Dorninger, Manfred; Zauner, Rudolf; Grubišić, Vanda (Peer reviewed; Journal article, 2016-07-10)This study shows that turbulent kinetic energy (TKE) estimates, derived from static LiDARs in Doppler Beam Swing (DBS) mode, permit a qualitative and quantitative characterization and analysis of turbulent structures as ... -
Validation of boundary layer parameterization schemes in the Weather Research and Forecasting Model (WRF) under the aspect of offshore wind energy applications - Part II: Boundary layer height and atmospheric stability
Krogsæter, Olav; Reuder, Joachim (Peer reviewed; Journal article, 2015-07)Five different planetary boundary layer (PBL) schemes in the Weather Research and Forecasting (WRF) model have been tested with respect to their capability to model boundary layer parameters relevant for offshore wind ... -
Velocity spectra and coherence estimates in the marine atmospheric boundary layer
Cheynet, Etienne; Jakobsen, Jasna Bogunovic; Reuder, Joachim (Journal article; Peer reviewed, 2018)Two years of continuous sonic anemometer measurements conducted in 2007 and 2008 at the FINO1 platform are used to investigate the characteristics of the single- and two-point velocity spectra in relation to the atmospheric ... -
Wave–induced characteristics of atmospheric turbulence flux measurements
Paskyabi, Mostafa Bakhoday; Flügge, Martin; Edson, James B.; Reuder, Joachim (Peer reviewed; Journal article, 2013)In this paper, we present the air–sea flux of momentum obtained with the eddy correlation method applied to data measured from a moored discus buoy deployed approximately 600 m off a research Air Sea Interaction Tower at ... -
Wind coherence measurement by a single pulsed Doppler wind lidar
Cheynet, Etienne Francois Cyprien; Jakobsen, Jasna Bogunovic; Svardal, Benny; Reuder, Joachim; Kumer, Valerie-Marie (Peer reviewed; Journal article, 2016-09)A single pulsed Doppler wind lidar, deployed at the FINO1 platform in the North Sea, has been used to monitor the lateral and vertical coherence of the along-wind component. To maximize the sampling frequency of the ... -
Wind Stress in the Coastal Zone: Observations from a Buoy in Southwestern Norway
Flügge, Martin; Bakhoday Paskyabi, Mostafa; Reuder, Joachim; El Guernaoui, Omar (Peer reviewed; Journal article, 2019-08-26)Several studies have focused on the investigation of the wind stress in open ocean conditions where coastal processes were negligible. However, the direction and magnitude of the wind stress vector in coastal areas are ...