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Climate variability and amplification revealed from indicators in the Gulf of Taranto

Vivaldo, Gianna Climate variability and amplification revealed from indicators in the Gulf of Taranto. Il Nuovo Cimento C - Colloquia on Physics, 35 (5). pp. 115-127. ISSN 2037-4909 (2012)

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Abstract

A well-dated, high-resolution core (GT90-3), extracted from the Gallipoli Terrace in the Ionian Sea, is used to deduce information about climate variability during the last millennia and in particular before 1000 AD, where few proxy records are available. We present the foraminiferal δ18O record measured in this core and covering the last 2200 years, whose spectral analysis, performed by several advanced methods, reveals highly significant oscillatory components with periods of about 600, 350, 200, 125 and 11 years. These components are discussed also in comparison with those deduced from other archives, concluding that the overall trend and the 200 y component together are very likely temperature-driven. On the contrary, concerning the decadal range the situation is not so clear and salinity and circulation effects probably cannot be completely neglected.

Item Type: Article
Identification Number: 10.1393/ncc/i2012-11328-0
Uncontrolled Keywords: PACS 92.60.Iv – Paleoclimatology. PACS 92.70.Kb – Regional climate change. PACS 91.67.Rx – Stable isotope geochemistry. PACS 02.70.Hm – Spectral methods.
Subjects: Q Science > QC Physics
Q Science > QE Geology
Research Area: Economics and Institutional Change
Depositing User: Gianna Vivaldo
Date Deposited: 10 Nov 2014 14:03
Last Modified: 25 Mar 2015 09:16
URI: http://eprints.imtlucca.it/id/eprint/2363

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