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Statistics for extreme sea-currents.

Robinson, M. E. and Tawn, J. A. (1997) Statistics for extreme sea-currents. Journal of the Royal Statistical Society: Series C (Applied Statistics), 46 (2). pp. 183-205. ISSN 0035-9254

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Abstract

Estimates of various characteristics of extreme sea currents, such as speeds and their directions, are required when designing offshore structures. This paper extends standard statistical methods for extreme values to handle the directionality, temporal dependence and tidal non-stationarity that are present in sea current extremes. The methods are applied to a short period of data from the Inner Dowsing Light Tower in the North Sea. Substantial benefits, over existing methods, are obtained from our analysis of the sea current by decomposing it into tide and surge currents. In particular, we find that at the Inner Dowsing the strong directionality in extreme sea current speeds is completely explained by the tidal current and directionality in the non-extreme surge currents. This finding aids model fitting and extrapolation.

Item Type: Article
Journal or Publication Title: Journal of the Royal Statistical Society: Series C (Applied Statistics)
Uncontrolled Keywords: Directional extremal index • Directional extremal index • Extreme value theory • Extreme value theory • Generalized extreme value distribution • Joint probabilities method • Point process • Sea currents
Subjects: Q Science > QA Mathematics
Departments: Faculty of Science and Technology > Mathematics and Statistics
ID Code: 19512
Deposited By: ep_ss_importer
Deposited On: 14 Nov 2008 12:08
Refereed?: Yes
Published?: Published
Last Modified: 24 Oct 2014 11:35
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/19512

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