Browsing Bergen Open Research Archive by Author "Paskyabi, Mostafa Bakhoday"
Now showing items 1-13 of 13
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Analysis of offshore wind spectra and coherence under neutral stability condition using the two LES models PALM and SOWFA
Ning, Xu; Krutova, Maria; Paskyabi, Mostafa Bakhoday (Journal article; Peer reviewed, 2021)The Parallelized Large-Eddy Model (PALM) and the Simulator for Wind Farm Applications (SOWFA) have been used to simulate the marine boundary layer flows under neutral stability condition. The present work aims to investigate ... -
Automated Measurements of Whitecaps on the Ocean Surface from a Buoy-Mounted Camera
Paskyabi, Mostafa Bakhoday; Reuder, Joachim; Flügge, Martin (Peer reviewed; Journal article, 2016-12)We quantify the percentage of sea surface covered by whitecaps from images taken by a non-stationary camera mounted on a moored buoy using an Adaptive Thresholding Segmentation (ATS) method and an Iterative Between Class ... -
Autonomous Ocean Turbulence Measurements Using Shear Probes on a Moored Instrument
Fer, Ilker; Paskyabi, Mostafa Bakhoday (Peer reviewed; Journal article, 2014-02)An internally recording, autonomous instrument has been tested for measurements of ocean turbulence from a mooring line. Measurements were made at a single level in the water column, but for an extended period of time, at ... -
Development of an automatic thresholding method for wake meandering studies and its application to the data set from scanning wind lidar
Krutova, Maria; Paskyabi, Mostafa Bakhoday; Reuder, Joachim; Nielsen, Finn Gunnar (Journal article; Peer reviewed, 2022)Wake meandering studies require knowledge of the instantaneous wake evolution. Scanning lidar data are used to identify the wind flow behind offshore wind turbines but do not immediately reveal the wake edges and centerline. ... -
The influence of surface gravity waves on the injection of turbulence in the upper ocean
Paskyabi, Mostafa Bakhoday; Fer, Ilker (Peer reviewed; Journal article, 2014-06-25)Observations were made in the near-surface layer, at about 8 m depth in 132 m deep water off the coast of Ålesund in Norway, for a duration of 2.5 months in late 2011. The measurement period covers the passage of two low ... -
Modelling the effect of ocean waves on the atmospheric and ocean boundary layers
Jenkins, Alastair D.; Paskyabi, Mostafa Bakhoday; Fer, Ilker; Gupta, Alok; Adakudlu, Muralidhar (Peer reviewed; Journal article, 2012)Ocean waves, in addition to generating direct forces on fixed and floating offshore wind generator structures, also have significant indirect effects via their influence on the atmospheric and oceanic boundary layers above ... -
Perturbation in the atmospheric acoustic field from a large offshore wind farm in the presence of surface gravity waves
Paskyabi, Mostafa Bakhoday (Peer reviewed; Journal article, 2013)In this study a quantitatively reliable approximation of atmospheric sound wave propagation is given in the presence of a large wind farm. Rough sea surface is used as lower boundary condition at the sea surface, and an ... -
Predictive Capability of WRF Cycling 3DVAR: LiDAR Assimilation at FINO1
Paskyabi, Mostafa Bakhoday; Flügge, Martin (Journal article; Peer reviewed, 2021)In this study, we assess tentatively the predictive capability of the Weather Research and Forecasting (WRF) model and its Three-Dimensional Variational (3DVAR) system. We study the impact of LiDAR data assimilation on ... -
Small-scale turbulence dynamics under sea surface gravity waves
Paskyabi, Mostafa Bakhoday (Doctoral thesis, 2014-08-20)The ocean surface is a complex boundary where air-sea fluxes of mass, momentum and energy take place. The processes at this dynamic interface are of great importance in the coupled atmosphere-ocean system. The coupling ... -
Turbulence Measurements in Shallow Water from a Subsurface Moored Moving Platform
Paskyabi, Mostafa Bakhoday; Fer, Ilker (Peer reviewed; Journal article, 2013)Preliminary results are presented from a moored, autonomous instrument measuring the upper ocean turbulent dissipation rate together with the surface gravity wave field. Observations are made in the area approximately 30 ... -
Turbulence structure in the upper ocean: a comparative study of observations and modeling
Paskyabi, Mostafa Bakhoday; Fer, Ilker (Peer reviewed; Journal article, 2014-04)Observations of turbulent dissipation rates measured by two independent instruments are compared with numerical model runs to investigate the injection of turbulence generated by sea surface gravity waves. The nearsurface ... -
Upper Ocean Response to Large Wind Farm Effect in the Presence of Surface Gravity Waves
Paskyabi, Mostafa Bakhoday; Fer, Ilker (Peer reviewed; Journal article, 2012)The upper ocean response in the presence of a wind farm is studied numerically, taking into account the effect of surface gravity waves. The farm geometry is a simplified rigid rectangle with characteristic size of L aligned ... -
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 ...