Universality in the precipitation and river runoff
Universality in the precipitation and river runoff
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DOI：
10.1209/0295-5075/97/48011
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发表时间：
2012-02-01
期刊：
影响因子：
1.8
通讯作者：
Bunde, A.
中科院分区：
文献类型：
--
作者：
Bogachev, M. I.;Bunde, A.
为了表征降水和径流的内在动力结构，我们研究了有代表性的季节性去趋势记录中记录低于给定阈值Q的持续时间τ。当阈值的返回周期R-Q不变时，我们发现这些持续时间的概率密度函数（PDF）在与平均持续时间成比例时表现出普遍的特征。对于这两种类型的数据，标度函数可以近似为伽马分布，但也可以通过长期相关记录的相应PDF进行描述。PDF的参数取决于数据的种类（降水或河川径流）和R-Q，但既不取决于气候，也不取决于记录位置的水文细节。版权所有（C）EPLA，2012
For characterizing the inherent dynamical structure of precipitation and river runoffs, we study in representative seasonally detrended records the durations tau where the record is below a given threshold Q. When keeping the return period R-Q of the threshold fixed, we find that the probability density function (PDF) of these durations shows universal features when scaled with the average duration . For both types of data the scaling function can be approximated by a Gamma-distribution, but also a description by the corresponding PDF of long-term correlated records is possible. The parameters of the PDF depend on the kind of data (precipitation or river runoff) and on R-Q but neither on the climate nor on the hydrological details of the location of the record. Copyright (C) EPLA, 2012