Blar i Geophysical Institute på emneord "Turbulence"
Viser treff 1-17 av 17
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Characterization of the coastal marine atmospheric boundary layer (MABL) for wind energy applications
(Master thesis, 2013-06-03)The main problem for the characterization of marine atmospheric boundary layer is the lack of available offshore measurements in relevant altitude range up to 200 m. Remote sensing meteorological instruments such as LIDARs ... -
Characterization of the SUMO Turbulence Measurement System for Wind Turbine Wake Assessment
(Peer reviewed; Journal article, 2014)The remotely piloted aircraft system (RPAS) SUMO (Small Unmanned Meteorological Observer) has been equipped with a miniaturized 5-hole probe sensor system for measurement of the 3-dimensional flow vector with a temporal ... -
Comparison of direct covariance flux measurements from an offshore tower and a buoy
(Peer reviewed; Journal article, 2016-05)Direct covariance flux (DCF) measurements taken from floating platforms are contaminated by wave-induced platform motions that need to be removed before computation of the turbulent fluxes. Several correction algorithms ... -
Dissipation measurements using temperature microstructure from an underwater glider
(Peer reviewed; Journal article, 2014-09)Microstructure measurements of temperature and current shear are made using an autonomous underwater glider. The glider is equipped with fast-response thermistors and airfoil shear probes, providing measurements of dissipation ... -
The dissipation of kinetic energy in the Lofoten Basin Eddy
(Peer reviewed; Journal article, 2018-06)Ocean microstructure, current, and hydrography observations from June 2016 are used to characterize the turbulence structure of the Lofoten Basin eddy (LBE), a long-lived anticyclone in the Norwegian Sea. The LBE had an ... -
First results of turbulence measurements in a wind park with the Small Unmanned Meteorological Observer SUMO
(Peer reviewed; Journal article, 2012-01)The Small Unmanned Meteorological Observer (SUMO), equipped with a miniaturized 5-hole probe for turbulent flow measurements with 100 Hz temporal resolution, has for the first time been operated in and around a wind farm. ... -
Innovative strategies for observations in the Arctic atmospheric boundary layer (ISOBAR)—The Hailuoto 2017 Campaign
(Peer reviewed; Journal article, 2018-07-16)The aim of the research project “Innovative Strategies for Observations in the Arctic Atmospheric Boundary Layer (ISOBAR)” is to substantially increase the understanding of the stable atmospheric boundary layer (SBL) through ... -
Microstructure measurements using a glider in the Faroe Bank Channel Overflow
(Master thesis, 2013-05-30)The application of turbulence instrumentation on underwater gliders is addressed, and two methods for glider-inferred dissipation rates of turbulent kinetic energy are evaluated against a ship-based vertical microstructure ... -
Preliminary results of the NORCOWE Direct Covariance Flux System for Ship based measurements
(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 ... -
Proof of concept for wind turbine wake investigations with the RPAS SUMO
(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 ... -
Sensor movement correction for direct turbulence measurements in the marine atmospheric boundary layer
(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 study on the Atmospheric Boundary Layer in the High Arctic during winter
(Master thesis, 2016-08-26)We investigated the stable boundary layer in Adventdalen by measuring meteorological parameters with Sonic anemometers at two heights, as well as slow response measurements, during a 7 week measurement campaign from February ... -
Turbulence structure in the upper ocean: a comparative study of observations and modeling
(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 ... -
Turbulent heat and momentum fluxes in the upper ocean under Arctic sea ice
(Peer reviewed; Journal article, 2017-02)We report observations of heat and momentum fluxes measured in the ice-ocean boundary layer from four drift stations between January and June 2015, covering from the typical Arctic basin conditions in the Nansen Basin to ... -
Turbulent kinetic energy estimates from profiling wind LiDAR measurements and their potential for wind energy applications
(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 ... -
A wavelet-entropy based segmentation of turbulence measurements from a moored shear probe near the wavy sea surface
(Peer reviewed; Journal article, 2019-12-17)In this study, we explore the applicability of a wavelet-entropy based segmentation technique in reduction of motion-induced contaminations in time-domain from subsurface turbulence measurements made by a moving shear ... -
Wind Stress in the Coastal Zone: Observations from a Buoy in Southwestern Norway
(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 ...