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Persistent millennial-scale climate variability in Southern Europe during Marine Isotope Stage 6
Version 2 2023-06-12, 09:35
Version 1 2023-06-09, 22:06
journal contribution
posted on 2023-06-12, 09:35 authored by G P Wilson, Mick FrogleyMick Frogley, P D Hughes, K H Roucoux, V Magari, T D Jones, M L Leng, P C TzedakisExploring 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 high-amplitude 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.
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- Published
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- Published version
Journal
Quaternary Science AdvancesISSN
2666-0334Publisher
ElsevierExternal DOI
Volume
3Page range
1-10Article number
a100016Department affiliated with
- Geography Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2020-11-10First Open Access (FOA) Date
2020-11-18First Compliant Deposit (FCD) Date
2020-11-09Usage metrics
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