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| Titel |
Investigating the multifractality of point precipitation in the Madeira archipelago |
| VerfasserIn |
M. I. P. Lima, J. L. M. P. Lima |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 16, no. 2 ; Nr. 16, no. 2 (2009-04-15), S.299-311 |
| Datensatznummer |
250013140
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| Publikation (Nr.) |
 copernicus.org/npg-16-299-2009.pdf |
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| Zusammenfassung |
The purpose of this work is to contribute to a better
understanding of the variability of precipitation in the Madeira
archipelago. This archipelago is located in the Atlantic subtropical belt
under the direct influence of the Azores high pressure system. It is formed
by Madeira Island (728 km2) and Porto Santo Island (42 km2) and by
two other groups of very small inhabited islands. The complex topography of
the islands in the Madeira archipelago and their small size play a crucial
role in the local precipitation regime, which is marked by high spatial
variability.
This paper explores the invariance of properties manifested across scales
and determines the fractal and multifractal behaviour observed in the
temporal structure of precipitation using daily and 10-min time series
from several locations scattered over the main islands. The period covered
by the precipitation records is 34 years for the daily data and almost 4
months for the 10-min data. The results show that the temporal structure
of precipitation in the Madeira Archipelago exhibits scale-invariant and
multifractal properties. The empirical exponent functions describing the
scaling statistical properties of the precipitation intensity were
characterized using multifractal parameters; these parameters are increasing
our awareness of the dynamics of this process in these islands. |
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