Imaging measurement of whitecaps at sea observation tower

Y. Sugihara, H. Tsumori, H. Yoshioka, S. Serizawa, A. Masuda

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Citations (Scopus)


    Whitecap coverage was estimated from imaging measurements at a sea observation tower. High-resolution images of whitecaps were taken using a digital camera system located at 14 m above the mean sea level, and they were stored automatically in steps of 1 s. The present results indicate that the 1/3 power of whitecap coverage increases linearly with increasing the wind speed at an elevation of 10 m, and that whitecapping is influenced significantly by the near-water air stability and the state of development of surface waves. Whitecaps are produced most activity under the condition of pure windsea, and they tend to be suppressed by the presence of swell. It is difficult to find the dependence of whitecap coverage on the deflection angle between propagating directions of wind waves and swell.

    Original languageEnglish
    Title of host publicationProceedings of the 29th International Conference on Coastal Engineering 2004, ICCE 2004
    EditorsJane McKee Smith, Jane McKee Smith
    PublisherAmerican Society of Civil Engineers (ASCE)
    Number of pages11
    ISBN (Electronic)9789812562982, 9789812562982
    Publication statusPublished - Apr 1 2005
    Event29th International Conference on Coastal Engineering, ICCE 2004 - Lisbon, Portugal
    Duration: Sept 19 2004Sept 24 2004

    Publication series

    NameProceedings of the Coastal Engineering Conference
    ISSN (Print)0161-3782


    Other29th International Conference on Coastal Engineering, ICCE 2004

    All Science Journal Classification (ASJC) codes

    • Civil and Structural Engineering
    • Ocean Engineering
    • Oceanography


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