Investigating Coastal Effects on Offshore Wind Conditions in Japan Using Unmanned Aerial Vehicles

Kazutaka Goto (), Takanori Uchida, Takeshi Kishida, Daisuke Nohara, Keisuke Nakao and Ayumu Sato
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Kazutaka Goto: Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry, 1646 Abiko, Abiko-shi 270-1166, Chiba, Japan
Takanori Uchida: Research Institute for Applied Mechanics (RIAM), Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Fukuoka, Japan
Takeshi Kishida: Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry, 1646 Abiko, Abiko-shi 270-1166, Chiba, Japan
Daisuke Nohara: Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry, 1646 Abiko, Abiko-shi 270-1166, Chiba, Japan
Keisuke Nakao: Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry, 1646 Abiko, Abiko-shi 270-1166, Chiba, Japan
Ayumu Sato: Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry, 1646 Abiko, Abiko-shi 270-1166, Chiba, Japan

Energies, 2025, vol. 18, issue 5, 1-11

Abstract: Wind conditions play a significant role in wind power generation. Offshore wind turbines in Japan are located in areas with a shorter fetch compared with those in Europe, raising concerns about more significant coastal effects on offshore wind conditions. Therefore, we conducted observations using unmanned aerial vehicles (UAVs) to investigate coastal effects on offshore wind conditions in Japan, measuring the vertical structure of meteorological parameters at multiple nearshore locations. We explored the application of data pre-processing methods to focus on the spatial variations caused by coastal effects and minimize short-term fluctuations. The results indicated that using ensemble averages of multiple vertical profiles effectively reduced short-term fluctuations. Our UAV observations revealed that stable stratification developed even within the 1300 m fetch region, with rapid growth rates. Additionally, we found that wind speeds were independent of height in some cases, suggesting that the wind profile power law is not suitable for expressing the vertical profiles of wind speed.

Keywords: coastal effects; nearshore wind conditions; unmanned aerial vehicle; meteorological observations; data pre-processing methods; offshore wind power (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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