The IOWAGA data base for the North Atlantic region was used to identify the region where extreme values of significant wave height are more likely to occur. The IOWAGA database  was obtained from the WAVEWATCH III model  hindcast using the CFSR (Climate Forecast System Reanalysis) from NOAA [3,4]. The period of the study covers 1990 up to 2012 (23 years). The variability of the significant wave height was assessed by computing return periods for sea storms where the significant wave height exceeds a given threshold. The return periods of sea storms where the Hs exceeds extreme values for the north Atlantic region were computed allowing for the identification of the extreme wave regions which show that extreme waves are more likely to occur in the storm track regions of the tropical and extratropical north Atlantic cyclones.
Evolution of the Extreme Wave Region in the North Atlantic Using a 23 Year Hindcast
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Ponce de León, S, Bettencourt, JH, Brennan, J, & Dias, F. "Evolution of the Extreme Wave Region in the North Atlantic Using a 23 Year Hindcast." Proceedings of the ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. Volume 3: Structures, Safety and Reliability. St. John’s, Newfoundland, Canada. May 31–June 5, 2015. V003T02A019. ASME. https://doi.org/10.1115/OMAE2015-41438
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