CEO Konagaya will be giving a poster presentation at the Japan Geoscience Union 2025 Meeting (JpGU 5), which will be held from May 25th to 30th, 2025. The details are as follows:

■ Presentation Summary

  • Presenter: Mizuki Konagaya
  • Presentation format: Poster presentation (May 5th)
  • Presentation title: Land–Sea Contrast of Nearshore Wind and Thermal Conditions at the Mutsu-Ogawara Test Site
  • Event period: May 2025th (Sun) to 5th (Fri), 25
  • Location: Makuhari Messe (Chiba Prefecture)
  • Tournament official website:https://www.jpgu.org/meeting_j2025/

■ Research Background and Positioning

This research was conducted as part of the NEDO "Establishment of Offshore Wind Condition Observation Methods" project at the Mutsu Ogawara Offshore Wind Condition Observation Test Site in Aomori Prefecture (https://mo-testsite.com/) to conduct comparative observations on land and offshore (approximately 1.5 km) with the aim of gaining a detailed understanding of the wind conditions and thermal environment in coastal areas, which are essential for the development of offshore wind power generation.

■ Main Results

  • It was found that the annual average wind speed at the offshore site (St.S) was approximately 120% higher at an altitude of 6.4 m compared to the onshore site (St.L), demonstrating the advantages of offshore wind power generation.
  • A 63% increase in wind speed was observed in the low-altitude (19 m) land breeze at St. S. In addition, the vertical wind shear, expressed by the power exponent α, was larger at St. L (α = 0.32) than at St. S (α = 0.19), indicating the influence of topography on the formation of land breezes.
  • Looking at the fluctuations in atmospheric stability, it was found that while diurnal fluctuations due to solar radiation are prominent on land, seasonal fluctuations due to the influence of sea surface temperatures are prominent over the ocean.

■ Looking ahead

This study clarified that wind conditions and thermal environments differ greatly between onshore and offshore even over a distance of just 1.5 km, and reminded us of the importance of on-site observation of offshore wind power generation. ReraTech will continue to actively pursue research and studies aimed at the spread of renewable energy.