Comment on nhess-2022-215

Abstract

Freak or rogue waves are unexpectedly large waves in seas and oceans, which occur without specific reasons, and cause human loss, damage of ships, oil platforms, and coastal structures. Evidences of such waves are widely spread around the globe. The present paper is devoted to analysis of the unified collection of freak wave events from different chronicles and catalogues from 2005 to 2021. The considered rogue waves are not measured in situ data, but their descriptions, which have been found in the mass media sources and scientific articles. All of them resulted in ship or coastal/offshore structure damage and/or human losses. The collection accounts for 429 events. First, the analysis based on their characteristics taken from the descriptions of the events (including locations, water depth, damages) is carried out. Second, the analysis of wave parameters taken from the climate reanalysis ERA5 is performed. Thus, the most probable background wave parameters in time of freak event (including wind speed, gusts, significant wave height, maximum wave height, peak wave period, skewness, and kurtosis) for each freak wave event are determined.