Título A mixed distribution to fix the threshold for Peak-Over-Threshold wave height estimation
Publicación externa No
Medio Sci Rep
Alcance Article
Naturaleza Científica
Cuartil JCR 2
Cuartil SJR 1
Impacto JCR 4.60000
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-85139886193&doi=10.1038%2fs41598-022-22243-8&partnerID=40&md5=1bccfb31c0da07df2bde0263ca2764d6
Fecha de publicacion 15/10/2022
ISI 000869292100042
Scopus Id 2-s2.0-85139886193
DOI 10.1038/s41598-022-22243-8
Abstract Modelling extreme values distributions, such as wave height time series where the higher waves are much less frequent than the lower ones, has been tackled from the point of view of the Peak-Over-Threshold (POT) methodologies, where modelling is based on those values higher than a threshold. This threshold is usually predefined by the user, while the rest of values are ignored. In this paper, we propose a new method to estimate the distribution of the complete time series, including both extreme and regular values. This methodology assumes that extreme values time series can be modelled by a normal distribution in a combination of a uniform one. The resulting theoretical distribution is then used to fix the threshold for the POT methodology. The methodology is tested in nine real-world time series collected in the Gulf of Alaska, Puerto Rico and Gibraltar (Spain), which are provided by the National Data Buoy Center (USA) and Puertos del Estado (Spain). By using the Kolmogorov-Smirnov statistical test, the results confirm that the time series can be modelled with this type of mixed distribution. Based on this, the return values and the confidence intervals for wave height in different periods of time are also calculated. © 2022, The Author(s).
Palabras clave article; Gibraltar; Gulf of Alaska; normal distribution; Puerto Rico; Spain; theoretical study; time series analysis
Miembros de la Universidad Loyola

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