6 research outputs found
Multifractal detrended fluctuation analysis of rainfall time series in the Guadeloupe archipelago
Full text linkDue to the vulnerability of the Caribbean islands to the climate change
issue, it is important to investigate the behavior of rainfall. In addition,
the soil of the French West Indies Islands has been contaminated by an
insecticide (Chlordecone) whose decontamination is mainly done by drainage
water. Thus, it is crucial to investigate the fluctuations of rainfall in these
complex environments. In this study, 19 daily rainfall series recorded in
different stations of Guadeloupe archipelago from 2005 to 2014 were analyzed
with the multifractal detrended fluctuation analysis (MF-DFA) method. The aim
of this work is to characterize the long-range correlations and multifractal
properties of the time series and to find geographical patterns over the three
most important islands. This is the first study that addresses the analysis of
multifractal properties of rainfall series in the Caribbean islands. This
region is typically characterized by the almost constant influence of the trade
winds and a high exposure to changes in the general atmospheric circulation. 12
stations exhibit two different power-law scaling regions in rainfall series,
with distinct long-range correlations and multifractal properties for large and
small scales. On the contrary, the rest of stations only show a single region
of scales for relatively small scales. Hurst exponents reveal persistent
long-range correlations. In the most eastern analyzed areas, larger scales
exhibit higher persistence than smaller scales, which suggests a relationship
between persistence and the highest exposure to the trade winds. Stronger
conclusions can be drawn from multifractal spectra, which indicate that most
rainfall series have a multifractal nature with higher complexity and degree of
multifractality at the smallest scales. Furthermore, a clear dependence of
multifractal nature on the latitude is revealed.Comment: 43 pages. 11 figure
Evidence of the effect of an urban heat island on air quality near a landfill
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