Publications

Guedes Soares, C. and Neves, S. (2006), “Modelling Tidal Current Profiles by Means of Empirical Orthogonal Functions”, Journal of Offshore Mechanics and Arctic Engineering, Vol. 128, pp. 184-190

The method of Empirical Orthogonal Functions (EOFs) is used to model vertical velocity profiles of the current. The whole current field is filtered keeping only the frequency bands corresponding to the most significant peaks of the current power density spectra, which in most cases correspond to the main semidiurnal and long period tidal bands. New time-series are originated containing only filtered current. For each one of these filtered time series EOFs and respective Principal Components (PCs) are then derived. The derivation of Empirical Orthogonal Functions makes possible the separation of the local flow variability into a few modes of variance.

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