Extreme wave heights in the North Atlantic from altimeter data
Wimmer, Werenfrid, Challenor, Peter and Retzler, Chris (2006) Extreme wave heights in the North Atlantic from altimeter data. Renewable Energy, 31, (2), 241-248. (doi:10.1016/j.renene.2005.08.019).
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Extreme waves are an important ocean feature. We estimate return values of significant wave height from measurements by satellite altimeters over the North Atlantic. The data were divided into 2° latitude by 2° longitude grid squares and the median along the satellite track was taken in each. Return values were estimated by fitting a Generalised Pareto Distribution to all values above a threshold, which was allowed to vary spatially. This method is objective, more statistically robust and thus theoretically preferable to fitting a distribution to all the data. The novel method gave return values that were up to 37% smaller than those estimated by fitting a Fisher-Tippet 1 distribution to all the data.
|Keywords:||extreme wave heights, generalised pareto distribution|
|Subjects:||G Geography. Anthropology. Recreation > GC Oceanography|
|Divisions:||University Structure - Pre August 2011 > School of Ocean & Earth Science (SOC/SOES)
University Structure - Pre August 2011 > National Oceanography Centre (NERC)
|Date Deposited:||23 Mar 2006|
|Last Modified:||27 Mar 2014 18:13|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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