Anthropogenic and solar forcing in δ13C time pattern of coralline sponges |
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Authors: | Paolo Madonia Joachim Reitner |
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Institution: | 1. Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Palermo, Italyp.madonia@pa.ingv.itpaolo.madonia@ingv.it;4. G?ttingen Zentrum Geowissenschaften (GZG), Abteilung Geobiologie, Universit?t G?ttingen, G?ttingen, Germany |
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Abstract: | We present the results of a re-analysis of a previously published carbon isotope data-set related to coralline sponges in the Caribbean Sea. The original interpretation led to the discrimination between a pre-industrial period, with a signal controlled by solar-induced climatic variations, followed by the industrial era, characterized by a progressive δ13C negative shift due to the massive anthropogenic carbon emissions. Our re-analysis allowed to extract from the raw isotopic data evidence of a solar forcing still visible during the industrial era, with a particular reference to the 88-year Gleissberg periods. These signals are related to slope changes in both the δ13C versus time and the δ13C versus carbon emission curves. |
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Keywords: | carbon-13 Caribbean Sea coral reef isotope ecology isotope geochemistry paleoclimate |
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