Correlation of concurrent extreme metocean hazards considering seasonality

Simultaneous occurrence of metocean variables can present a multihazard to maritime systems. However, simplified design approaches to assess simultaneous significant wave heights and wind velocities are lacking, especially if seasonality is considered. This is addressed in this study by using extreme significant wave heights and companion wind velocities recorded in the Gulf of Mexico. Time-dependent, generalized extreme value (GEV) models and classical regression are the basis to propose a simplified approach to estimate correlated extreme significant wave heights and wind velocities associated with given return periods, accounting for seasonality and including measures of uncertainty. It is found that the proposed approach is a new but simple method to adequately characterize the concurrent extreme metocean variables and their uncertainty. It is concluded that the method is an effective probabilistic design tool to determine simultaneous extreme significant wave heights and companion wind velocities for desired return periods and seasonality.The financial support from the Erasmus Mundus Coastal and Marine Engineering and Management (CoMEM) programme and support from Laboratori d’Enginyeria Marítima, Universitat Politècnica de Catalunya and from Universidad de Guanajuato (CIIC 2020 Research Projects) is gratefully acknowledged. Acknowledgments: We thank two anonymous reviewers for their comments, suggestions and constructive criticism. We also thank guess Editor Guido Ventura and the editorial team of Applied Sciences for their help in the editorial process.Peer ReviewedPostprint (published version