title: Anthropogenic and solar forcing in δ13C time pattern of coralline sponges.
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 δ(13)C 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 δ(13)C versus time and the δ(13)C versus carbon emission curves.
authors.affiliation: a Istituto Nazionale di Geofisica e Vulcanologia , Sezione di Palermo, Palermo , Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Madonia
authors.forename: Joachim
authors.initials: J
authors.lastname: Reitner
mesh_terms: D000818:Animals; D002244:Carbon / Q000378:metabolism*; D002247:Carbon Isotopes / Q000378:metabolism; D017691:Caribbean Region; D004784:Environmental Monitoring; D017752:Greenhouse Effect; D011161:Porifera / Q000737:chemistry*; D016082:Solar System; D013997:Time Factors
chemical_list: D002247:Carbon Isotopes; D002244:Carbon
keywords: Caribbean Sea; carbon-13; coral reef; isotope ecology; isotope geochemistry; paleoclimate