Publicações

Laface, V., Arena, F. e Guedes Soares, C. (2015), “Directional analysis of sea storms”, Ocean Engineering, Vol. 107, pp. 45-53

The paper deals with the directional wave analysis and the correlation among intensity, duration and direction of severe ocean storms in the Atlantic and Pacific Oceans and in the Mediterranean Sea. Different types of data have been processed for the analysis: data given by Wave Model for Atlantic Ocean and data given by directional buoys for Mediterranean Sea and Pacific Ocean. The analysis is carried out by using as input data significant wave height and wave direction time series. All the storms in the data set are identified by mean of Boccotti criterion and analyzed by applying Equivalent Triangular Storm model, which associates a triangle to each actual storm. A study about relationship between intensity and duration of actual storms and between height and base of Equivalent Triangular Storms is given. Then, for each storm variability of direction during its time history is investigated. Directional analysis is carried out in two steps. In the former, the main directions from which the strongest storms occur have been identified for each location considered by using directional distribution of significant wave height. In the latter, the variation of wave direction during storm history has been evaluated, showing as direction during storms varies within well-defined sectors centered on the main directions from which the strongest storms occur. Starting from this result a directional definition of storm is introduced and base-height correlation coefficients for Equivalent Triangular Storms have been calculated for directional storms.

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