Land–Sea Contrast of Nearshore Wind Conditions: Case Study in Mutsu-Ogawara

Konagaya, Mizuki; Ohsawa, Teruo; Inoue, Tatsuro; Mito, Toshinari; Kato, Hideki; Kawamoto, K.

doi:10.2151/sola.2021-041

Cited by 2 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The scanning LiDAR validation experiments were conducted during the period November 7 to December 31, 2020, at a coastal research site of Mutsu–Ogawara Port, which is located on the Pacific coast of Aomori Prefecture in northern Japan. The detailed description of this site can be found in Konagaya et al 20 At this site, several validation campaigns have been conducted involving both scanning LiDAR devices and floating LiDAR systems. This region has a rectilinear coastline running from 0° to 180° and is surrounded by a moderately complex terrain with mixed vegetation.…”

Section: Methodsmentioning

confidence: 99%

Validation of near‐shore wind measurements using a dual scanning light detection and ranging system

et al. 2022

Self Cite

View full text Add to dashboard Cite

This paper reports results from a 2-month validation campaign of near-shore wind measurements taken by a dual scanning light detection and ranging (LiDAR) system at a coastal site in Japan. A meteorological mast and a vertical profiling LiDAR device were deployed at an offshore research station approximately 1.5 km from the coast.Offshore winds at heights of 66, 120, and 180 m above sea level were observed by the scanning LiDAR system. Comparisons with a sonic anemometer found that the radial velocities had a coefficient of determination of more than 0.99 without unreasonable bias. The accuracy of 10-min mean wind speeds and directions was then evaluated. The 10-min values from the dual scanning LiDAR system were accurate enough to satisfy the acceptance criteria used for floating LiDAR systems. In addition, the vertical velocity and direction profiles from the dual scanning LiDAR system were compared with those from a vertical profiling LiDAR device. The performance of turbulence intensity (TI) measurements was also evaluated. Although the TIs from the dual scanning LiDAR system were slightly lower than those from the sonic anemometer, they were equivalent to those from the cup anemometers. This investigation concluded that the near-shore wind measurements using the dual scanning LiDAR system are beneficial for reducing near-shore wind measurement costs, because the system can measure not only 10-min wind speed and direction, but also parameters associated with assessing site-specific conditions without installing offshore meteorological masts.

show abstract

Section: Methodsmentioning

confidence: 99%

Validation of near‐shore wind measurements using a dual scanning light detection and ranging system

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

Accuracy Verification of Multiple Floating LiDARs at the Mutsu-Ogawara Site

Uchiyama,

Ohsawa,

Asou

et al. 2024

Energies

View full text Add to dashboard Cite

Floating LiDAR systems (FLSs) may replace conventional offshore met masts, and they have been developed well in Europe. However, before using them in Japan, we must determine whether they demonstrate the same performance under the unique East-Asian meteorological and oceanographic conditions. Therefore, herein, we investigate the performance of FLSs by focusing on the differences among models. Four independent wind datasets from three FLSs were simultaneously verified against a reference met mast and vertical LiDAR at a Japanese site. The data availability was confirmed to vary from 62.7 to 98.0% over the period at 63 m. This was strongly affected by the system availability of the buoy and LiDAR, suggesting that buoy system robustness is key to better campaigns with higher data availability. The 10 min averaged wind speed and direction largely satisfied the Carbon Trust’s key performance indicators, with a low sensitivity to wave conditions depending on the buoy shape. The standard deviation of the wind speed and turbulence intensity had poorer accuracy than that of the 10 min averaged statistics because of the wave-induced buoy motion, especially for small buoys. In short, this paper provides an overview of a measurement by FLS in Japan. Also, the unique verification with multiple units suggests the need for a low-motion buoy or motion compensation to improve the measurement accuracy of the turbulence component.

show abstract

Land–Sea Contrast of Nearshore Wind Conditions: Case Study in Mutsu-Ogawara

Cited by 2 publications

References 9 publications

Validation of near‐shore wind measurements using a dual scanning light detection and ranging system

Validation of near‐shore wind measurements using a dual scanning light detection and ranging system

Accuracy Verification of Multiple Floating LiDARs at the Mutsu-Ogawara Site

Contact Info

Product

Resources

About