22 year cycle in the planktonic 18 of a shallow-water Ionian sea core

Cini Castagnoli, G. and Bonino, G. and Taricco, C. (2000) 22 year cycle in the planktonic 18 of a shallow-water Ionian sea core. Il nuovo cimento C, 23 C (4). pp. 449-452. ISSN 1826-9885

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The d18 O profile of Globigerinoides ruber was measured in the GT90/3 Ionian sea core between 1205 and 1898 AD. The high temporal resolution of 3.87 y allowed us to determine the presence in the time series of an 11 y component with an amplitude of 0.07‰, at significance level of 99% (by Monte Carlo singular spectrum analysis, MC-SSA). Here we focus attention on the 22 y periodicity in the time series and we show that SSA principal components (PCs) 15 and 16 carry this oscillation, in phase with the Hale solar cycle, obtained by inverting the odd cycles of the sunspot number series. This result shows that the even and odd Schwabe cycles do not have the same influence on this climatic record.

Item Type: Article
Uncontrolled Keywords: Meteorology; Marine geology and geophysics Climatology; Sunspots, faculae, plages
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia
Depositing User: Marina Spanti
Date Deposited: 09 Mar 2020 15:34
Last Modified: 09 Mar 2020 15:34
URI: http://eprints.bice.rm.cnr.it/id/eprint/13939

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