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Grupo de Ambiente Marinho > 1.1 Modelos espectrais e modelos de séries temporais da Agitação Marítima > Publicações
Veltcheva, A.D. e Guedes Soares, C. (2004), “Identification of the Components of Wave Spectra by the Hilbert Huang Transform Method”, Applied Ocean Research, Vol. 26, pp. 1-12
Real sea waves are nonlinear and non-stationary by nature and their profile is asymmetrical with respect to the zero level, with sharp crests and flat troughs especially as they become large. The existence of small ripples riding longer waves, as well as creation of many small waves resulting from wave breaking, complicates considerably the sea surface profile. The wave data records are always registration of mixture of many wave systems with different periods and energy, generated by different sources. The objective of the analysis of sea surface elevation records is to determine characteristic time/frequency scales of the distribution of energy.
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http://www.sciencedirect.com/science/article/pii/S0141118704000410
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