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Univ Bristol, Sch Geog Sci, Bristol, Avon, England
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- PublicationRestrictedResponse to comment by Hilgen et al.: Integrated stratigraphy and pitfalls of automated tuning(2014-02)
; ; ; ; ;Colleoni, F.; Ctr Euromediterraneo Cambiamenti Climatici, Bologna, Italy ;Masina, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia ;Negri, A.; Univ Politecn Marche, Dipartimento Sci Vita & Ambiente, Ancona, Italy ;Marzocchi, A.; Univ Bristol, Sch Geog Sci, Bristol, Avon, England; ; ; First of all we thank Hilgen and co-authors for their interest in our manuscript. Here we provide an answer to their comment in order to prove the robustness of our conclusions, despite the tuning process that we performed on the original MEDSTACK from Lourens et al. (2004) and Wang et al. (2010).252 71 - PublicationRestrictedPlio-Pliocene high-low latitude climate interplay: a Mediterranean point of view(2012-02)
; ; ; ; ;Colleoni, F.; Centro Euro-Mediterraneo sui Cambiamenti Climatici ;Masina, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia ;Negri, A.; Universita' Politecnica delle Marche ;Marzocchi, A.; Centro Euro-Mediterraneo sui Cambiamenti Climatici; ; ; The high–low latitude climate interplay during the Plio–Pleistocene global cooling is not yet well understood. Insight on the Mediterranean region can provide some clues about past significant climate changes since the basin reflects the climate dynamics of both high-latitude and low-latitude regions, being connected to the North Atlantic and subjected to monsoon influence. Here we shade light on this connection problem by per- forming a spectral analysis on an Eastern Mediterranean stack of planktonic records spanning the last 5 Ma and by further comparing it to North Atlantic and Pacific deep- and surface-water records. Our main conclu- sion is that the Mediterranean detected the main global climate transitions over the last 5 Myr although sapropel depositions indicate that it remained influenced by the African summer monsoon during the whole interval. Our analysis reveals that until 2.2 Ma the Mediterranean planktonic record is driven by re- gional processes dominated by precession. The progressive emergence of the 41-kyr frequency in the Medi- terranean records around 2.8 Ma suggests that, since this date, the Mediterranean was more and more affected by the high-latitude climate dynamics forcing than by the low-latitude one. Moreover, during the ongoing Plio–Pleistocene cooling, the 41-kyr frequency signal in the Mediterranean records anticipated high-latitude deep-water response to the intensification of the Northern Hemisphere Glaciations (NHG) and lagged the signal in tropical latitudes. Finally, toward 1.2 Ma the results suggest that the progressive shift from the 41-kyr to the 100-kyr frequency was led by the northern high latitudes. Overall, our results confirm that the Mediterranean is an ideal site to study the interplay between high and low latitude climates.313 56