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Wind speed surplus in wind farm wakes quantified from satellite SAR and mesoscale modeling
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  • Charlotte Bay Hasager,
  • James Imber,
  • Jana Fischereit,
  • Aito Fujita,
  • Krystallia Dimitriadou,
  • Merete Badger
Charlotte Bay Hasager
Danmarks Tekniske Universitet Institut for Vindenergi

Corresponding Author:cbha@dtu.dk

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James Imber
Thermo Fisher Scientific Inc Mitato-ku Tokyo
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Jana Fischereit
Danmarks Tekniske Universitet Institut for Vindenergi
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Aito Fujita
Thermo Fisher Scientific Inc Mitato-ku Tokyo
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Krystallia Dimitriadou
Danmarks Tekniske Universitet Institut for Vindenergi
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Merete Badger
Danmarks Tekniske Universitet Institut for Vindenergi
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Abstract

Satellite SAR provides ocean surface wind fields at 10 m above sea level. The objective is to investigate the capability of Synthetic Aperture Radar (SAR) satellite StriX observations for mapping offshore wind farm wakes. The focus is on the conditions under which an apparent wind speed surplus is generated, measured in 48% of the 67 images available. The results compare well to Sentinel-1 observations, showing a 34% surplus rate during several years based on 1171 images. Three wind speed surplus cases have been studied in detail using the mesoscale Weather, Research, and Forecasting model (WRF) model with two wind farm parametrizations. The SAR-based observations and WRF model compare for most cases, though only when Turbulent Kinetic Energy (TKE) is included in the wind farm parametrization. The TKE mixes higher momentum downwards in a stable atmosphere, causing surface wind speed surplus near the surface.
Submitted to Wind Energy
10 Nov 2023Reviewer(s) Assigned
18 Mar 20241st Revision Received
18 Mar 2024Assigned to Editor
18 Mar 2024Submission Checks Completed
18 Mar 2024Review(s) Completed, Editorial Evaluation Pending
22 Mar 2024Reviewer(s) Assigned
07 Jun 20242nd Revision Received
26 Jun 2024Review(s) Completed, Editorial Evaluation Pending
28 Jun 2024Editorial Decision: Accept