Wilson, GP;
Frogley, MR;
Hughes, PD;
Roucoux, KH;
Margari, V;
Jones, TD;
Leng, MJ;
(2021)
Persistent millennial-scale climate variability in Southern Europe during Marine Isotope Stage 6.
Quaternary Science Advances
, 3
, Article 100016. 10.1016/j.qsa.2020.100016.
(In press).
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Abstract
Exploring the mode and tempo of millennial-scale climate variability under evolving boundary conditions can provide insights into tipping points in different parts of the Earth system, and can facilitate a more detailed understanding of climate teleconnections and phase relationships between different Earth system components. Here we use fossil diatom and stable carbon and oxygen isotope analysis of lake sediment deposits (core I-284) from the Ioannina basin, NW Greece, to explore in further detail millennial-scale climate instability in southern Europe during Marine Isotope Stage 6 (MIS 6; ca. 185–130 ka). This interval correlates with the Vlasian Stage in Greece and the Late Saalian Substage in northern Europe, which were both characterised by extensive glaciations. The new dataset resolves at least 18 discrete warmer/wetter intervals, many of which were associated with strong Asian Monsoon events and North Atlantic interstadials. A number of cooler/drier intervals are also identified in the I-284 record, which are typically associated with weaker Asian Monsoon events and North Atlantic stadials, consistent with a variable Atlantic Meridional Overturning Circulation. Unlike the subdued changes in tree populations that are observed at Ioannina during mid-to-late MIS 6, the diatom record contains frequent highamplitude oscillations in species assemblages, pointing to its sensitivity at a time when the lake system must have been close to environmental thresholds. Millennial-scale variability in diatom species assemblages continues into late MIS 6 at Ioannina, contributing important evidence for an emerging picture of frequent and persistent climate instability even at times of high global ice volume.
| Type: | Article |
|---|---|
| Title: | Persistent millennial-scale climate variability in Southern Europe during Marine Isotope Stage 6 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.qsa.2020.100016 |
| Publisher version: | https://doi.org/10.1016/j.qsa.2020.100016 |
| Language: | English |
| Additional information: | This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/). |
| Keywords: | Marine Isotope Stage 6, Southern Europe, Millennial-scale climate variability |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL SLASH UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Dept of Geography |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10115611 |
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