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Basin-wide spatial conditional extremes for severe ocean storms

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Basin-wide spatial conditional extremes for severe ocean storms. / Shooter, Robert; Tawn, Jonathan; Ross, Emma; Jonathan, Philip.

In: Extremes, Vol. 24, No. 2, 30.06.2021, p. 241-265.

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Shooter, Robert ; Tawn, Jonathan ; Ross, Emma ; Jonathan, Philip. / Basin-wide spatial conditional extremes for severe ocean storms. In: Extremes. 2021 ; Vol. 24, No. 2. pp. 241-265.

Bibtex

@article{444cbc1565224b7cb60976417f578633,
title = "Basin-wide spatial conditional extremes for severe ocean storms",
abstract = "Physical considerations and previous studies suggest that extremal dependence between ocean storm severity at two locations exhibits near asymptotic dependence at short inter-location distances, leading to asymptotic independence and perfect independence with increasing distance. We present a spatial conditional extremes (SCE) model for storm severity, characterising extremal spatial dependence of severe storms by distance and direction. The model is an extension of Shooter et al. (2019) and Wadsworth and Tawn (2019), incorporating piecewise linear representations for SCE model parameters withdistance and direction; model variants including parametric representations of some SCE model parameters are also considered.The SCE residual process is assumed to follow the delta-Laplace form marginally, with distance-dependent parameter. Residual dependence of remote locations given conditioning location is characterised by a conditional Gaussian covariance dependent on the distances between remote locations, and distances of remote locations to the conditioning location. We apply the model using Bayesian inference to estimates extremal spatial dependence of storm peak signicant wave height on a neighbourhood of 150 locations covering over 200,000 km2 in the North Sea.",
keywords = "Spatial conditional extremes, Extremal dependence, Covariate effects, Ocean storms",
author = "Robert Shooter and Jonathan Tawn and Emma Ross and Philip Jonathan",
year = "2021",
month = jun,
day = "30",
doi = "10.1007/s10687-020-00389-w",
language = "English",
volume = "24",
pages = "241--265",
journal = "Extremes",
issn = "1386-1999",
publisher = "Springer Netherlands",
number = "2",

}

RIS

TY - JOUR

T1 - Basin-wide spatial conditional extremes for severe ocean storms

AU - Shooter, Robert

AU - Tawn, Jonathan

AU - Ross, Emma

AU - Jonathan, Philip

PY - 2021/6/30

Y1 - 2021/6/30

N2 - Physical considerations and previous studies suggest that extremal dependence between ocean storm severity at two locations exhibits near asymptotic dependence at short inter-location distances, leading to asymptotic independence and perfect independence with increasing distance. We present a spatial conditional extremes (SCE) model for storm severity, characterising extremal spatial dependence of severe storms by distance and direction. The model is an extension of Shooter et al. (2019) and Wadsworth and Tawn (2019), incorporating piecewise linear representations for SCE model parameters withdistance and direction; model variants including parametric representations of some SCE model parameters are also considered.The SCE residual process is assumed to follow the delta-Laplace form marginally, with distance-dependent parameter. Residual dependence of remote locations given conditioning location is characterised by a conditional Gaussian covariance dependent on the distances between remote locations, and distances of remote locations to the conditioning location. We apply the model using Bayesian inference to estimates extremal spatial dependence of storm peak signicant wave height on a neighbourhood of 150 locations covering over 200,000 km2 in the North Sea.

AB - Physical considerations and previous studies suggest that extremal dependence between ocean storm severity at two locations exhibits near asymptotic dependence at short inter-location distances, leading to asymptotic independence and perfect independence with increasing distance. We present a spatial conditional extremes (SCE) model for storm severity, characterising extremal spatial dependence of severe storms by distance and direction. The model is an extension of Shooter et al. (2019) and Wadsworth and Tawn (2019), incorporating piecewise linear representations for SCE model parameters withdistance and direction; model variants including parametric representations of some SCE model parameters are also considered.The SCE residual process is assumed to follow the delta-Laplace form marginally, with distance-dependent parameter. Residual dependence of remote locations given conditioning location is characterised by a conditional Gaussian covariance dependent on the distances between remote locations, and distances of remote locations to the conditioning location. We apply the model using Bayesian inference to estimates extremal spatial dependence of storm peak signicant wave height on a neighbourhood of 150 locations covering over 200,000 km2 in the North Sea.

KW - Spatial conditional extremes

KW - Extremal dependence

KW - Covariate effects

KW - Ocean storms

U2 - 10.1007/s10687-020-00389-w

DO - 10.1007/s10687-020-00389-w

M3 - Journal article

VL - 24

SP - 241

EP - 265

JO - Extremes

JF - Extremes

SN - 1386-1999

IS - 2

ER -