Marine response to climate changes during the last four millennia in the central Mediterranean Sea
| Autor: | Margaritelli G.(1), (2), Vallefuoco M.(1), Di Rita F.(3), Bellucci L.G.(4), Insinga D.D.(1), Petrosino P.(5), Bonomo S.(1), Cacho I. (6), Capotondi L.(4), Cascella A. (7), Ferraro, L.(1), Florindo F.(8), Lubritto C. (9), Lurcock P.C.(8), Magri D.(3), Pelosi N.(1), Rettori R. (2), Lirer F.(1) |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Global and planetary change (2016). info:cnr-pdr/source/autori:Margaritelli G.(1), (2), Vallefuoco M.(1), Di Rita F.(3), Bellucci L.G.(4), Insinga D.D.(1), Petrosino P.(5), Bonomo S.(1), Cacho I. (6), Capotondi L.(4), Cascella A. (7), Ferraro, L.(1), Florindo F.(8), Lubritto C. (9), Lurcock P.C.(8), Magri D.(3), Pelosi N.(1), Rettori R. (2), Lirer F.(1)/titolo:Marine response to climate changes during the last four millennia in the central Mediterranean Sea/doi:/rivista:Global and planetary change (Print)/anno:2016/pagina_da:/pagina_a:/intervallo_pagine:/volume |
| Popis: | We present a high-resolution paleoclimatic reconstruction of the last four millennia from a shallow water marine record recovered in the central Tyrrhenian Sea (Gulf of Gaeta) based on planktonic foraminifera and pollen records combined with oxygen stable isotope, tephrostratigraphic and magnetostratigraphic analysis. Paleoclimatic events have been recognised and discussed within the following time in intervals: Eneolithic (base of the core- ca. 2410 BC), Early Bronze Age (ca. 2410 BC - ca. 1900 BC), Middle Bronze Age - Iron Age (ca. 1900 BC - ca. 500 BC), Roman Period (ca. 500 BC - ca. 550 AD), Dark Age (ca. 550 AD - ca. 860 AD), Medieval Climate Anomaly (ca. 860 AD - ca. 1250 AD), Little Ice Age (ca. 1250 AD - ca. 1850 AD), Industrial Period (ca. 1850 AD - ca. 1950 AD), Modern Warm Period (ca. 1950 AD - present day). Within these time intervals, the proxy records document short-term climate oscillations well correlated with other records from Mediterranean marine areas (Alboran Sea, Gulf of Taranto, Adriatic Sea, and Ionian Sea). The long term trend in oxygen isotopic record obtained from the planktonic foraminiferal species Globigerinoides ruber (?18OG.ruber) has an antithetic correlation with the North Atlantic Oscillation (NAO) suggesting a strong northern hemisphere influence on the climate variability of the central Mediterranean region. The long term trend and amplitude oscillations of the ?18OG.ruber signal, the onset of main planktonic foraminiferal turnover from carnivorous to herbivorous-opportunistic species, and the consistent fluctuations of the pollen records document an important modification in climate system from the onset of the Roman Period up to the present-day. In addition, from ca. 500 AD upwards, the planktonic foraminiferal ?18O data, from marine records, shows a synchronous progressive long-term shift to more positive values superimposed to short-term oscillation, suggesting a Mediterranean secular scale signature in isotopic composition. From Maunder event to present day there is a progressive inversion in ?18O composition, suggesting the onset of the modern warm climate condition. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|