A geostatistical extreme-value framework for fast simulation of natural hazard events

A geostatistical extreme-value framework for fast simulation of natural hazard events
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用于快速模拟自然灾害事件的地统计极值框架

DOI:
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发表时间:
2016
期刊:
Proceedings of the Royal Society A
影响因子:
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通讯作者:
D. Stephenson
D. Stephenson
中科院分区:
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文献类型:
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作者:
B. Youngman;D. Stephenson

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我们开发了一个统计框架,模拟自然灾害事件,结合极值理论和地质统计学。鲁棒广义加法模型的形式表示广义帕累托边际分布参数,而学生的t-过程捕捉空间依赖性,并给出了一个连续的空间框架自然灾害事件模拟。模拟方法的效率允许以相对较小的计算成本获得多年的数据(通常超过10 000)。这使得该模型可行的形成灾害模型的危险模块。我们通过模拟欧洲风暴的最大阵风来说明该框架,发现该框架具有现实的边缘和空间特性,并对阵风测量进行了验证。
We develop a statistical framework for simulating natural hazard events that combines extreme value theory and geostatistics. Robust generalized additive model forms represent generalized Pareto marginal distribution parameters while a Student’s t-process captures spatial dependence and gives a continuous-space framework for natural hazard event simulations. Efficiency of the simulation method allows many years of data (typically over 10 000) to be obtained at relatively little computational cost. This makes the model viable for forming the hazard module of a catastrophe model. We illustrate the framework by simulating maximum wind gusts for European windstorms, which are found to have realistic marginal and spatial properties, and validate well against wind gust measurements.
1979 年至 2012 年欧洲极端风暴的 XWS 开放获取目录
DOI: 10.5194/nhess-14-2487-2014
发表时间: 2014
影响因子: 4.6
作者:
Roberts J
通讯作者: Roberts J