A Brief multifractal analysis of rainfall dynamics in Piracicaba, Sao Paulo, Brazil

被引：8

作者：

Alves Xavier Junior, Silvio Fernando ^{[1
]}

Stosic, Tatijana ^{[2
]}

Stosic, Borko ^{[2
]}

Jale, Jader Da Silva ^{[2
]}

Morais Xavier, Erika Fialho ^{[2
]}

机构：

[1] Univ Estadual Paraiba, Dept Estat, Rua Baraunas 351, BR-58429500 Campina Grande, Paraiba, Brazil

[2] Univ Fed Rural Pernambuco, Programa Posgrad Biometria & Estat Aplicada, Recife, PE, Brazil

来源：

ACTA SCIENTIARUM-TECHNOLOGY | 2018年 / 40卷

关键词：

rainfall; power law; MF-DFA; DETRENDED FLUCTUATION ANALYSIS; RIVER-BASIN; TIME-SERIES; PRECIPITATION; PARAMETERS; RESOLUTION; TURBULENCE; RUNOFF; STOCK;

D O I：

10.4025/actascitechnol.v40i1.35116

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The aim of this study was to evaluate the statistical properties of a daily rainfall time series recorded in Piracicaba river basin, state of Sao Paulo, Brazil in the period 1917-2016. We apply Multifractal Detrended Fluctuation Analysis (MF-DFA) on deseasonalized data and calculate generalized scaling exponents, h(q). We find that h(q) is a decreasing function of q, indicating multifractal behavior of precipitation dynamics. We also perform calculations on two subseries corresponding to the periods before and after 1970, where the second period is characterised by a significant increase of positive trend in rainfall intensity. We find no significant change in behaviour between these two subseries and the entire series, indicating that the dynamics of the underlying process did not change. Our results agree with previous studies on multifractal properties of rainfall time series in other regions of the world supporting the hypotheses of the existence of multiplicative cascade processes in the atmosphere.

引用

页数：5

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