THE CHANGING RELATION BETWEEN WAVE HEIGHTS AND WIND SPEEDS OVER THE NORTH ATLANTIC

This paper is a sequel to a previous paper in which the author reviewed the evidence for, and implications of increases in mean wave height over the North Atlantic unaccompanied by increases in mean wind speed. Suggested explanations for the mean height increases in terms of the influence of swell are further explored with the aid of measured joint frequency distributions of wave height and wind speed from two stations in the North Atlantic. The results reinforce and extend the findings of the earlier work. In particular it is shown that introduction of a proposed empirical relation between wave growth rate and swell level greatly improves the effectiveness of the modelling used for explaining the trends in the reported data. Implications for prediction of waves from winds of importance for seakeeping studies are discussed. Also, it is shown how the modelling can be used to derive a direct relation between means wave height and swell level when, as in the case of the above two North Atlantic stations, the frequency distribution of wind speed is known. On this basis, estimates are made for these two stations of the increases in swell level needed to explain the reported increases in mean height.

  • Supplemental Notes:
    • Intl Conf on Seakeeping and Weather; 28 Feb & 1 March 1995; London, UK. Pprs. Publ by RINA, London, UK. Ppr 9 [13 p, 8 ref, 2 tab, 7 fig]
  • Authors:
    • Hogben, N
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717007
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM