Validation of Horizontal Gradient of Offshore Wind Speed near a Coastline Simulated by the WRF Model

• MISAKI Takeshi

  Graduate School of Maritime Sciences, Kobe University

• OHSAWA Teruo

  Graduate School of Maritime Sciences, Kobe University

• KOZAI Katsutoshi

  Graduate School of Maritime Sciences, Kobe University

• TAKEYAMA Yuko

  Renewable Energy Institute, National Institute of Advanced Industrial Science and Technology

• BABA Yasuyuki

  Disaster Prevention Research Institute, Kyoto University

• KAWAGUCHI Koji

  Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology

Bibliographic Information

Other Title

• WRFによって計算される海岸線付近の水平風速勾配の検証
• WRF ニヨッテ ケイサン サレル カイガンセン フキン ノ スイヘイ フウソク コウバイ ノ ケンショウ

Abstract

In this study, the accuracy of the WRF (the Weather Research and Forecasting model)-simulated horizontal gradient of offshore wind speed near a coastline is evaluated using in-situ measurements and Envisat/ASAR (Advanced Synthetic Aperture Rader) images. The WRF simulation is conducted for the coastal waters off Shirahama in Wakayama Prefecture and the accuracy is examined in comparison with in-situ measurements from the offshore platform of Shirahama Oceanographic Observatory (referred to as Shirahama) and the Wakayama Southwest buoy (SW-buoy). It is found that WRF overestimates wind speed at Shirahama through the year, while it underestimates wind speed at SW-buoy only for northwesterly winds, which are predominant through the year. For these reasons, WRF tends to have a weaker horizontal gradient of wind speed between these two sites. Compared with wind speed fields obtained from ASAR, it is found that the underestimation at SW-buoy is partly due to the offshore shift of a strong wind zone, formed by the speed-up effect from two upstream strains, in the WRF simulation.

Journal

• Journal of Wind Engineering

  Journal of Wind Engineering 42 (2), 57-66, 2017

  Japan Association for Wind Engineering

Keywords

• <I>offshore wind</I>
• <I>horizontal wind speed gradient</I>
• <I>WRF</I>
• <I>SAR</I>

Details

• CRID: 1390282680205559936
• NII Article ID: 130006091389
• NII Book ID: AN10072785
• ISSN: 09121935
• ISSN: 1349340X
• ISSN: 13493507
• DOI: 10.5359/jwe.42.57
• HANDLE: 20.500.14094/90005018
• NDL BIB ID: 028193828
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I028193828
• Web Site: https://www.jstage.jst.go.jp/article/jwe/42/2/42_57/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed