On the Growth of Wind-Generated Waves in a Swell-Dominated Region in the South Atlantic

[+] Author and Article Information
Nelson Violante-Carvalho

University of Southampton, Southampton Oceanography Centre-SOC, Southampton, SO14 3ZH, UKe-mail: violante.carvalho@soton.ac.uk

Carlos Eduardo Parente

Rio de Janeiro Federal University COPPE/UFRJ, Rio de Janeiro, Brazil

Ian S. Robinson

University of Southampton, Southampton Oceanography Centre-SOC, Southampton, SO14 3ZH, UK

Luis Manoel P. Nunes

Brazilian Oil Company CENPES/PETROBRAS, Rio de Janeiro, Brazil

J. Offshore Mech. Arct. Eng 124(1), 14-21 (Aug 04, 2001) (8 pages) doi:10.1115/1.1423636 History: Received July 24, 2000; Revised August 04, 2001
Copyright © 2002 by ASME
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Position of Campos Basin in the coast off Rio de Janeiro, Brazil, and the wave buoy. The shaded areas are the petroleum fields.
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Flow chart of the algorithm for the spectral adjustment of the 1-D wave spectrum
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Examples of the adjusted wave spectrum. Top panels show the measured 1-D spectrum (solid line) and the adjusted spectrum (dashed line) for a bimodal (left) and trimodal (right) case. Bottom panels show the respective directional or 2-D spectra calculated using the maximum entropy method.
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Distribution of the exponent n for the 243 selected cases of windsea decay in the form S(f )∝f−n. All the cases with decays smaller than −10 were put together at the last bin.
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Values of the high-frequency level α as a function of the reciprocal wave age U10/cp for a decay in the form S(f )∝f−5. The solid line is the best fit to the data α=0.0078(U10/cp)0.7295 and the dashed line is the JONSWAP relationship for α in terms of U10/cp,α=0.0080(U10/cp)0.73.




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