Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/nhess-2017-142
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
26 Apr 2017
Review status
This discussion paper is under review for the journal Natural Hazards and Earth System Sciences (NHESS).
Global ship accidents and ocean swell-related sea states
Zhiwei Zhang1,2 and Xiao-Ming Li2,3 1College of Geography and Environment, Shandong Normal University, Jinan, China
2Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China
3Hainan Key Laboratory of Earth Observation, Sanya, China
Abstract. With the increased frequency of shipping activities, navigation safety has become a major concern, especially when economic losses, human casualties and environmental issues are considered. As a contributing factor, sea state conditions play a significant role in shipping safety. However, the types of dangerous sea states that trigger serious shipping accidents are not well understood. To address this issue, we analyzed the sea state characteristics during ship accidents that occurred in poor weather or heavy seas based on a ten-year ship accident dataset. The sea state parameters, including the significant wave height, the mean wave period and the mean wave direction, obtained from numerical wave model data were analyzed for selected ship accidents. The results indicated that complex sea states with the co-occurrence of wind sea and swell conditions represent threats to sailing vessels, especially when these conditions include close wave periods and oblique wave directions.

Citation: Zhang, Z. and Li, X.-M.: Global ship accidents and ocean swell-related sea states, Nat. Hazards Earth Syst. Sci. Discuss., doi:10.5194/nhess-2017-142, in review, 2017.
Zhiwei Zhang and Xiao-Ming Li
Zhiwei Zhang and Xiao-Ming Li
Zhiwei Zhang and Xiao-Ming Li

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Short summary
In this study, we analyzed the sea state characteristics during ship accidents that occurred in weather-related conditions based on a ten-year ship accident dataset released by the International Maritime Organization. It is found that sea states of co-existed wind sea and swell, with close wave periods and oblique wave directions, representing threats to sailing vessels. We hope that these findings are valuable references to the study of shipping safety and also extreme wave mechanisms.
In this study, we analyzed the sea state characteristics during ship accidents that occurred in...
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