Drought analysis based on a cluster Poisson model:: distribution of the most severe drought

被引:16
|
作者
Abaurrea, J [1 ]
Cebrián, AC [1 ]
机构
[1] Univ Zaragoza, Dpto Metodos Estadist, Zaragoza 50009, Spain
关键词
drought analysis; Poisson cluster process; maximum in a random size sample; threshold methods; extreme values;
D O I
10.3354/cr022227
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This work aims to characterize the largest drought event to occur in a given period of time. A Poisson cluster process is used to model drought occurrence and a vector of 3 random variables (duration, deficit and maximum intensity) to describe their severity. Some results on the distribution of the maximum in a random size sample are developed in order to describe the largest drought events.
引用
收藏
页码:227 / 235
页数:9
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