Reconstructing sea-states in the Southern Ocean using ship motion data

Nelli, Filippo, van Zuydam, Armand, Pferdekamper, Karl, Alberello, Alberto ORCID:, Derkani, Marzieh, Bekker, Anriëtte and Toffoli, Alessandro (2021) Reconstructing sea-states in the Southern Ocean using ship motion data. In: Ocean Engineering. Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE . American Society of Mechanical Engineers (ASME), Virtual, Online. ISBN 9780791885161

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Sea state conditions can be estimated from the motion of a moving ship by converting its response to incident waves through the response amplitude operator. The method is applied herein to ship motion data from the icebreaker R/V Akademik Tryoshnikov and recorded during the Antarctic Circumnavigation Expedition across the Southern Ocean during the Austral summer 2016-17. The response amplitude operator of the vessel was estimated using two boundary element method models, namely NEMOH and HydroSTAR. An inter-comparison of model performance is discussed. The accuracy of the reconstructed sea states is assessed against concurrent measurements of the wave energy spectrum, which were acquired during the expedition with the marine radar WaMoS-II. Results show good agreement between reconstructed sea states (wave spectrum as well as integrated parameters) and direct observations. Model performances are consistent. Nevertheless, NEMOH produces slightly more accurate wave parameters when quantitatively compared against HydroSTAR.

Item Type: Book Section
Additional Information: Funding Information: This work was supported by the Cooperative Research Centres Projects, CRC-P, initiative of the Australian Government (project CRC-P53991) and the Antarctic Circumnavigation Expedition (ACE), which was funded by the Swiss Polar Institute and Ferring Pharmaceuticals. MHD was partially supported by a PhD top-up from the Australian Bureau of Meteorology. AA was supported by the Japanese Society for the Promotion of Science (PE19055). FN, AA, MHD and AT acknowledge technical support from the Air-Sea-Ice-Lab Project initiative. The research of Stellenbosch University is enabled through the National Research Foundation (NRF) South African National Antarctic Programme (SANAP Grant No.110737). Publisher Copyright: Copyright © 2021 by ASME
Uncontrolled Keywords: ocean engineering,energy engineering and power technology,mechanical engineering,sdg 14 - life below water ,/dk/atira/pure/subjectarea/asjc/2200/2212
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Depositing User: LivePure Connector
Date Deposited: 04 Dec 2021 01:45
Last Modified: 22 Oct 2022 23:55
DOI: 10.1115/OMAE2021-62757

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