Ocean waves are known to be both random in time and nonlinear. Surface elevation time histories measured in the Gulf of Mexico during Hurricane Camille in 1969 are re-analyzed. The average shapes of large crests and deep troughs in time are shown to be close to symmetric around the instant when the maximum (or minimum) occurs, with only slight evidence of asymmetry from wave breaking in the time histories. There is considerable vertical asymmetry with higher and sharper crests and smaller and more rounded troughs. Overall, the analysis supports the use of a focused wave group based on the scaled autocorrelation function (NewWave) as proposed by Lindgren and Boccotti, with sum harmonic corrections. There is a very small second order difference setup for both large crests and troughs, consistent with considerable directional spreading in the hurricane sea-state. This spreading is likely to be larger than that usually assumed for nontropical winter storms. The spectral tail is shown to have a decay rate proportional to –4.5 power law midway between the classical JONSWAP (Phillips) –5 form and the –4 slope proposed by Battjes et al. (1987, “A Reanalysis of the Spectra Observed in JONSWAP,” J. Phys. Oceanogr., 17(8), pp. 1288–1295) as a correction to JONSWAP.
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February 2013
Research-Article
Average Properties of the Largest Waves in Hurricane Camille
H. Santo,
H. Santo
1
Centre for Offshore Research & Engineering,
Department of Civil and Environmental Engineering,
e-mail: ceehs@nus.edu.sg
Department of Civil and Environmental Engineering,
National University of Singapore
,1 Engineering Drive 2
,Singapore 117576
e-mail: ceehs@nus.edu.sg
1Corresponding author.
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R. Eatock Taylor,
R. Eatock Taylor
Centre for Offshore Research & Engineering,
Department of Civil and Environmental Engineering,
Department of Engineering Science,
Department of Civil and Environmental Engineering,
National University of Singapore
,1 Engineering Drive 2
,Singapore 117576
;Department of Engineering Science,
University of Oxford
,Oxford OX1 3PJ
, UK
Search for other works by this author on:
Y. S. Choo
Y. S. Choo
Centre for Offshore Research & Engineering,
Department of Civil and Environmental Engineering,
Department of Civil and Environmental Engineering,
National University of Singapore
,1 Engineering Drive 2
,Singapore 117576
Search for other works by this author on:
H. Santo
Centre for Offshore Research & Engineering,
Department of Civil and Environmental Engineering,
e-mail: ceehs@nus.edu.sg
Department of Civil and Environmental Engineering,
National University of Singapore
,1 Engineering Drive 2
,Singapore 117576
e-mail: ceehs@nus.edu.sg
R. Eatock Taylor
Centre for Offshore Research & Engineering,
Department of Civil and Environmental Engineering,
Department of Engineering Science,
Department of Civil and Environmental Engineering,
National University of Singapore
,1 Engineering Drive 2
,Singapore 117576
;Department of Engineering Science,
University of Oxford
,Oxford OX1 3PJ
, UK
Y. S. Choo
Centre for Offshore Research & Engineering,
Department of Civil and Environmental Engineering,
Department of Civil and Environmental Engineering,
National University of Singapore
,1 Engineering Drive 2
,Singapore 117576
1Corresponding author.
Contributed by the Ocean Offshore and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received October 4, 2010; final manuscript received March 15, 2012; published online February 22, 2013. Assoc. Editor: Arvid Naess.
J. Offshore Mech. Arct. Eng. Feb 2013, 135(1): 011602 (7 pages)
Published Online: February 22, 2013
Article history
Received:
October 4, 2010
Revision Received:
March 15, 2012
Citation
Santo, H., Taylor, P. H., Eatock Taylor, R., and Choo, Y. S. (February 22, 2013). "Average Properties of the Largest Waves in Hurricane Camille." ASME. J. Offshore Mech. Arct. Eng. February 2013; 135(1): 011602. https://doi.org/10.1115/1.4006930
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