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The Impact of Winter Northwest Monsoon on Gust Factor

[+] Author Affiliations
Tomoya Nishida, Takuji Waseda

The University of Tokyo, Kashiwa, Chiba, Japan

Paper No. OMAE2013-10815, pp. V005T06A061; 6 pages
doi:10.1115/OMAE2013-10815
From:
  • ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 5: Ocean Engineering
  • Nantes, France, June 9–14, 2013
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5539-3
  • Copyright © 2013 by ASME

abstract

This paper examines temporal variation of ocean wind gust factor and turbulence intensity in the Northwest Pacific. Observation data at coastal and open oceans near Japan are analyzed to investigate the relationship between gust factor and turbulence intensity, and the seasonal variation of probability distribution of gust factor. The contrast of the winter monsoon cold air and relatively warmer sea surface temperature is the trigger for growth of the marine boundary layer. Downdraft by developed convection enhances sea surface gustiness. The relative significance of sensible heat flux to momentum flux is considered to be the cause of higher gust factor in winter. In view of deploying offshore wind turbines around Japan, the result of this study may be more relevant on the Sea of Japan side because the winter monsoon influence there is stronger than that on the Pacific side.

Copyright © 2013 by ASME

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