Data/hora: 06/06/2024 09:01:42

Provedor de dados: | 5
País: | France
Título: | Advanced spectral analysis and cross correlation based on the empirical mode decomposition: application to the environmental time series
Autores: | Ben Ismail, Dhouha Kbaier; Lazure, Pascal; Puillat, Ingrid.
Data: | 2015-09
Ano: | 2015
Palavras-chave: | Augmented Dickey-Fuller tests; Cross correlation; Empirical mode decomposition (EMD); Hilbert spectral analysis (HSA); Hilbert-Huang transform (HHT); Stationarity; Time-dependent intrinsic correlation (TDIC); Time series; Wavelets.
Resumo: | Abstract—In marine sciences, time series are often nonlinear and nonstationary. Adequate and specific methods are needed to analyze such series. In this paper, an application of the Empirical Mode Decomposition method (EMD) associated to the Hilbert Spectral Analysis (HSA) is presented. Furthermore, EMD based Time Dependent Intrinsic Correlation (TDIC) analysis is applied to consider the correlation between two nonstationary time series. Four temperature time series obtained from automatic measurements in nearshore waters of the Réunion island are considered, recorded every ten minutes from July 2011 to January 2012. The application of the EMD on these series and the estimation of their power spectra using the HSA are illustrated. The authors identify low-frequency tidal waves and display the pattern of correlations at different scales and different locations. By TDIC analysis, it was concluded that the high frequency modes have small correlation, whereas the trends are perfectly correlated.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00270/38077/36205.pdf

DOI:10.1109/LGRS.2015.2441374

http://archimer.ifremer.fr/doc/00270/38077/

Editor: | Ieee-inst Electrical Electronics Engineers Inc
Formato: | application/pdf
Fonte: | Ieee Geoscience And Remote Sensing Letters (1545-598X) (Ieee-inst Electrical Electronics Engineers Inc), 2015-09 , Vol. 12 , N. 9 , P. 1968-1972

Fonte:

2015 IEEE

info:eu-repo/semantics/openAccess

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