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A Two-Day Case Study: Comparison of Turbulence Data from an Unmanned Aircraft System with a Model Chain for Complex Terrain |
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| Authors: | zum Berge Kjell Schoen Martin Mauz Moritz Platis Andreas van Kesteren Bram Leukauf Daniel El Bahlouli Asmae Letzgus Patrick Knaus Hermann Bange Jens |
| Institution: | 1.Center for Applied Geoscience, Eberhard-Karls-Universitaet Tuebingen, Schnarrenbergstr. 94-96, 72076, Tuebingen, Germany ;2.Institute of Meteorology and Climate Research Atmospheric Environmental Research (IMK-IFU), Karlsruhe Institute of Technology KIT, Campus Alpin, Kreuzeckbahnstra?e 19, 82467, Garmisch-Partenkirchen, Germany ;3.Faculty of Building Services-Energy-Environment, Esslingen University of Applied Sciences, Kanalstrasse 33, 73728, Esslingen, Germany ;4.Institute of Aerodynamics and Gas Dynamics (IAG) University of Stuttgart, Pfaffenwaldring 21, 70569, Stuttgart, Germany ; |
| Abstract: | The airborne measurement platform MASC-3 (Multi-Purpose Airborne Sensor Carrier) is used for measurements over a forested escarpment in the Swabian Alps to evaluate the wind field. Data from flight legs between 20 and 200 m above the ground on two consecutive days with uphill (westerly) flow in September 2018 are analyzed. In the lowest 140 m above the ground a speed-up is found with increased turbulence and changes in wind direction directly over the escarpment, whereas in the lowest 20 to 50 m above the ground a deceleration of the flow is measured. Additionally, simulation results from a numerical model chain based on the Weather Research and Forecasting (WRF) model and an OpenFOAM (Open Source Field Operation and Manipulation) model, developed for complex terrain, are compared to the data captured by MASC-3. The models and measurements compare well for the mean wind speed and inclination angle. |
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