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| Incarbona, Alessandro; Dinares-turell, Jaume; Di Stefano, Enrico; Ippolito, Giuseppe; Pelosi, Nicola; Sprovieri, Rodolfo. |
| The Middle Pleistocene Transition (1.2-0.7 Ma) is the most recent re-organization of the global climate system which includes variations in the frequency and amplitude of glacial/interglacial cycles, increased ice sheet volume, sea surface temperature cooling and a significant drop in the CO2 atmospheric levels. Here we present high-resolution planktonic foraminifera data (mean sampling resolution of about 780 years) from core LC10 recovered in the Ionian Sea (eastern Mediterranean), between 1.2 and 0.9 Ma. Selected taxa, among them G. ruber, T. quinqueloba and G. bulloides, show significant periodicities that can be associated to orbital cycles, mainly precession and obliquity. The planktonic foraminifera based paleoclimatic curve exhibits a cooling... |
| Tipo: Text |
Palavras-chave: Middle Pleistocene Transition; Planktonic foraminifera; Ionian Sea; Orbital climate variability; Neogloboquadrina pachyderma sinistral coiling. |
| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00181/29205/27581.pdf |
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| Incarbona, Alessandro; Martrat, Belen; Di Stefano, Enrico; Grimalt, Joan O.; Pelosi, Nicola; Patti, Bernardo; Tranchida, Giorgio. |
| This study analyzes coccolithophore abundance fluctuations (e. g., Emiliania huxleyi, Gephyrocapsa specimens, and Florisphaera profunda) in core MD01-2444 sediment strata retrieved at the Iberian Margin, northeastern Atlantic Ocean. Coccolithophores are calcareous nannofossils, a major component of the oceanic phytoplankton, which provide information about past ecological and climatological variability. Results are supported by data on fossil organic compounds (sea surface temperatures, alkenones, and n-hexacosan-1-ol index) and geochemical analyses (benthic delta C-13(cc) and planktonic delta O-18(cc) isotopes). Three scenarios are taken into account for this location at centennial-scale resolution over the last 70,000 years: the Holocene and the stadial... |
| Tipo: Text |
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| Ano: 2010 |
URL: https://archimer.ifremer.fr/doc/00231/34205/32756.pdf |
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