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首页> 外文期刊>Hydrological Processes >Applying multifractality and the self-organized criticality theory to describe the temporal rainfall regimes in Andalusia (southern Spain)
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Applying multifractality and the self-organized criticality theory to describe the temporal rainfall regimes in Andalusia (southern Spain)

机译：应用多重分形和自组织临界理论描述安达卢西亚（西班牙南部）的时间降雨状况

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摘要

A multifractal analysis of hourly and daily rainfall data recorded at four locations of Andalusia (southern Spain) was carried out in order to study the temporal structure of rainfall and to find differences between both time resolutions. The results show that an algebraic tail is required to fit the probability distribution of the extreme rain events for all the cases. The presence of a multifractal phase transition associated with a critical moment in the empirical moments scaling exponent function was also detected. Both facts indicate that the rainfall process is a case of self-organized criticality (SOC) dynamics, although the results differ for each place according to the time resolution and the nature of the rainfall, either convective or frontal. This SOC behaviour is related to a statistically steady state that implies the presence of clusterization in the time-occurrence sequence of rain events. Such fluctuations have been shown by performing the analysis of the Fano and Allan factors and the count-based periodogram. The values for the "synoptic maximum", the typical lifetime of planetary scale atmospheric structures, have been obtained for each place and some important periodicities have been detected when dealing with extremes.
机译：为了研究降雨的时间结构并找出两种时间分辨率之间的差异，对安达卢西亚（西班牙南部）四个地点记录的每小时和每日降雨数据进行了多重分形分析。结果表明，在所有情况下，都需要代数尾部以适应极端降雨事件的概率分布。还检测到与经验矩比例指数函数中的临界矩相关的多重分形相变的存在。这两个事实都表明降雨过程是自组织临界（SOC）动态的一种情况，尽管每个地方的结果根据时间分辨率和降雨性质（对流或锋面）而有所不同。此SOC行为与统计稳定状态相关，该统计稳定状态表示在降雨事件的时间序列中存在聚类。通过执行Fano和Allan因子分析以及基于计数的周期图已显示出这种波动。在每个地方都获得了“天气最大值”的值，即行星尺度大气结构的典型寿命，并且在处理极端现象时已检测到一些重要的周期性。

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