We measured the delta 13C profile of Globigerinoides Ruber in a shallow water Ionian sea core dated with high precision by means of radiometric and tephroanalysis methods. The time series, covering the period 200-1979 AD with a resolution of 3.87 years, is analyzed using the Wavelet Transform (WT). The same analysis is performed also on another climatic record, the tree-rings delta 13C of a Japanese cedar, spanning a similar time interval (125-1952 AD). The Wavelet Spectra (WS) of the two series and the Cross Wavelet Spectrum (CWS) between them allow highlighting the common spectral content on different time scales and investigating a possible link between climate and solar variations.
Decadal and centennial cycles revealed in two climate isotopic records
TARICCO, Carla;ALESSIO, Silvia Maria
2005-01-01
Abstract
We measured the delta 13C profile of Globigerinoides Ruber in a shallow water Ionian sea core dated with high precision by means of radiometric and tephroanalysis methods. The time series, covering the period 200-1979 AD with a resolution of 3.87 years, is analyzed using the Wavelet Transform (WT). The same analysis is performed also on another climatic record, the tree-rings delta 13C of a Japanese cedar, spanning a similar time interval (125-1952 AD). The Wavelet Spectra (WS) of the two series and the Cross Wavelet Spectrum (CWS) between them allow highlighting the common spectral content on different time scales and investigating a possible link between climate and solar variations.
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