Geoscientific Model Development, 2020-01, Vol.13 (1), p.249-268
2020
Details
- Autor(en) / Beteiligte
- Titel
- Turbulent kinetic energy over large offshore wind farms observed and simulated by the mesoscale model WRF (3.8.1)
- Ist Teil von
- Geoscientific Model Development, 2020-01, Vol.13 (1), p.249-268
- Ort / Verlag
- Katlenburg-Lindau: Copernicus GmbH
- Erscheinungsjahr
- 2020
- Link zum Volltext
- Quelle
- EZB Electronic Journals Library
- Beschreibungen/Notizen
- Wind farms affect local weather and microclimates; hence, parameterizations of their effects have been developed for numerical weather prediction models. While most wind farm parameterizations (WFPs) include drag effects of wind farms, models differ on whether or not an additional turbulent kinetic energy (TKE) source should be included in these parameterizations to simulate the impact of wind farms on the boundary layer. Therefore, we use aircraft measurements above large offshore wind farms in stable conditions to evaluate WFP choices. Of the three case studies we examine, we find the simulated ambient background flow to agree with observations of temperature stratification and winds. This agreement allows us to explore the sensitivity of simulated wind farm effects with respect to modeling choices such as whether or not to include a TKE source, horizontal resolution, vertical resolution and advection of TKE. For a stably stratified marine atmospheric boundary layer (MABL), a TKE source and a horizontal resolution on the order of 5 km or finer are necessary to represent the impact of offshore wind farms on the MABL. Additionally, TKE advection results in excessively reduced TKE over the wind farms, which in turn causes an underestimation of the wind speed deficit above the wind farm. Furthermore, using fine vertical resolution increases the agreement of the simulated wind speed with satellite observations of surface wind speed.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1991-9603, 1991-959X, 1991-962XeISSN: 1991-9603DOI: 10.5194/gmd-13-249-2020Titel-ID: cdi_doaj_primary_oai_doaj_org_article_7dc5dd3ceaa247f994117a1b2a87a8ec
- Format
- –
- Schlagworte
- Advection, Advection (Earth sciences), Aerodynamics, Aircraft, Analysis, Atmospheric boundary layer, Atmospheric models, Boundary layers, Buildings and facilities, Case studies, Computational fluid dynamics, Computer simulation, Drag effects, Energy (Physics), Force and energy, Kinetic energy, Marine atmospheric boundary layer, Microclimate, Numerical weather forecasting, Numerical weather prediction, Offshore, Offshore energy sources, Offshore operations, offshore wind farms, Planetary boundary layer, Prediction models, Resolution, Satellite observation, Stratification, Surface wind, Turbulent kinetic energy, Weather, Weather forecasting, weather predication models, Wind, Wind effects, WIND ENERGY, wind farm parameterizations, Wind farms, Wind power, Wind power generation, Wind power plants, Wind speed, Winds