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Rainfall Time Series Analysis with Wavelets and Huang Hilbert Transform

Author(s): Athanasios Zeris; Panagiotis Prinos

Linked Author(s): Panagiotis Prinos

Keywords: Rainfall; Morlet Wavelet; Huang Hilbert Transform; Empirical Mode Decomposition

Abstract: In the present study, rainfall time series analysis is presented with state of the art methods, like wavelets analysis and Huang Hilbert Transforms method. Data from three cities of Northern Greece, (Thessaloniki, Kozani and Alexandroupolis) are analyzed and studied in the time frequency plane. Morlet wavelet is implemented for wavelet transform and global and scale averaged representation of the monthly rainfall time series from 1958 to 2000. For the same time period, Empirical Mode Decomposition and Huang Hilbert Transform is presented for Alexandroupolis city. Wet and dry periods are identified from the transformations and strong annual cycle is found for the city of Alexandroupolis.


Year: 2005

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