Spatial deformation for nonstationary extremal dependence
Spatial deformation for nonstationary extremal dependence
复制标题
非平稳极值依赖性的空间变形
DOI:
10.1002/env.2671
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发表时间:
2021
期刊:
影响因子:
1.7
通讯作者:
Richards J
中科院分区:
文献类型:
--
作者:
Richards J
Modeling the extremal dependence structure of spatial data is considerably easier if that structure is stationary. However, for data observed over large or complicated domains, nonstationarity will often prevail. Current methods for modeling nonstationarity in extremal dependence rely on models that are either computationally difficult to fit or require prior knowledge of covariates. Sampson and Guttorp (1992) proposed a simple technique for handling nonstationarity in spatial dependence by smoothly mapping the sampling locations of the process from the original geographical space to a latent space where stationarity can be reasonably assumed. We present an extension of this method to a spatial extremes framework by considering least squares minimization of pairwise theoretical and empirical extremal dependence measures. Along with some practical advice on applying these deformations, we provide a detailed simulation study in which we propose three spatial processes with varying degrees of nonstationarity in their extremal and central dependence structures. The methodology is applied to Australian summer temperature extremes and UK precipitation to illustrate its efficacy compared with a naive modeling approach.
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影响因子:
2.6
作者:
A. Davison;R. Huser;Emeric Thibaud
通讯作者:
Emeric Thibaud
DOI:
10.1214/16-aoas965
发表时间:
2016
期刊:
The Annals of Applied Statistics
影响因子:
--
作者:
Hugo C. Winter;J. Tawn;S. Brown
通讯作者:
S. Brown
DOI:
10.48550/arxiv.1912.06560
发表时间:
2019
期刊:
arXiv e-prints
影响因子:
--
作者:
Wadsworth Jennifer L.
通讯作者:
Wadsworth Jennifer L.
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
E. Ross;D. Randell;K. Ewans;G. Feld;P. Jonathan
通讯作者:
P. Jonathan
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
M. Ribatet
通讯作者:
M. Ribatet