English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/15517
Compartir / Impacto:
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Using empirical mode decomposition to correlate paleoclimatic time-series

AutorSolé, Jordi ; Turiel, Antonio ; Llebot, Josep Enric
Fecha de publicación17-abr-2007
EditorEuropean Geosciences Union
Copernicus Publications
CitaciónNatural Hazards and Earth System Sciences 7(2): 299-307 (2007)
ResumenDetermination of the timing and duration of paleoclimatic events is a challenging task. Classical techniques for time-series analysis rely too strongly on having a constant sampling rate, which poorly adapts to the uneven time recording of paleoclimatic variables; new, more flexible methods issued from Non-Linear Physics are hence required. In this paper, we have used Huang's Empirical Mode Decomposition (EMD) for the analysis of paleoclimatic series. We have studied three different time series of temperature proxies, characterizing oscillation patterns by using EMD. To measure the degree of temporal correlation of two variables, we have developed a method that relates couples of modes from different series by calculating the instantaneous phase differences among the associated modes. We observed that when two modes exhibited a constant phase difference, their frequencies were nearly equal to that of Milankovich cycles. Our results show that EMD is a good methodology not only for synchronization of different records but also for determination of the different local frequencies in each time series. Some of the obtained modes may be interpreted as the result of global forcing mechanisms.
Descripción9 pages, 5 figures
Versión del editorhttp://dx.doi.org/10.5194/nhess-7-299-2007
ISSN1561-8633 (Print)
1684-9981 (Online)
Aparece en las colecciones: (ICM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Sole_et_al_2007.pdf1,19 MBAdobe PDFVista previa
Mostrar el registro completo

Artículos relacionados:

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.