Global extreme wave estimates and their sensitivity to the analysed data period and data sources
Amarouche, Khalid and Akpinar, Adem and Kamranzad, Bahareh and Khames, Ghollame-Ellah-Yacine (2023) Global extreme wave estimates and their sensitivity to the analysed data period and data sources. Marine Structures, 92. 103494. ISSN 0951-8339 (https://doi.org/10.1016/j.marstruc.2023.103494)
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Abstract
In the absence of wave measuring buoys operating over extended periods, wave hindcast data or satellite observations are indispensable for estimating global extreme wave heights. However, the results may depend on the analysed wind wave sources and the period's length. The sensitivity of the estimated extreme significant wave heights (SWH) to the analysed data sources and periods is investigated in this study. Global extreme wave heights are estimated using ECMWF Reanalysis v5 data (ERA5), global wave hindcast developed based on Simulating WAves Nearshore forced by the Japanese 55-year Reanalysis (SWAN-JRA55), satellite altimeter observations, and long-term wave buoy measurements. Both Annual Maximum fitting to the Generalized Extreme Value Distribution (AM-GEV) and Peaks Over Threshold fitted to the Generalized Pareto Distribution (POT-GPD) models are used. The results show that the global extreme SWH estimates considerably depend on the analysed data sources. The relative differences observed between the analysed data sources are >20% in large parts of the world. Thus, the relative differences in extreme SWH are mainly lower by increasing the analysed data periods. However, they can reach 30% and are more critical using AM-GEV. Besides, by comparing the extreme values from reanalysis and hindcast wave data to those from long-term wave measurements, underestimations of up to 2 m are observed for a return period of 100 years in the North-West Atlantic and North-East Pacific.
ORCID iDs
Amarouche, Khalid, Akpinar, Adem, Kamranzad, Bahareh ORCID: https://orcid.org/0000-0002-8829-6007 and Khames, Ghollame-Ellah-Yacine;-
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Item type: Article ID code: 86246 Dates: DateEvent30 November 2023Published13 July 2023Published Online6 July 2023Accepted23 June 2023SubmittedSubjects: Technology > Hydraulic engineering. Ocean engineering
Naval Science > Naval architecture. Shipbuilding. Marine engineeringDepartment: Faculty of Engineering > Civil and Environmental Engineering Depositing user: Pure Administrator Date deposited: 24 Jul 2023 09:31 Last modified: 07 Oct 2024 00:26 URI: https://strathprints.strath.ac.uk/id/eprint/86246