Persistent millennial-scale climate variability in Southern Europe during Marine Isotope Stage 6
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 differe...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-04-01
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| Series: | Quaternary Science Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666033420300162 |
| _version_ | 1818899109515362304 |
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| author | G.P. Wilson M.R. Frogley P.D. Hughes K.H. Roucoux V. Margari T.D. Jones M.J. Leng P.C. Tzedakis |
| author_facet | G.P. Wilson M.R. Frogley P.D. Hughes K.H. Roucoux V. Margari T.D. Jones M.J. Leng P.C. Tzedakis |
| author_sort | G.P. Wilson |
| collection | DOAJ |
| description | 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 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. |
| first_indexed | 2024-12-19T19:42:44Z |
| format | Article |
| id | doaj.art-2b07857778f64986bacb551eed58a6e3 |
| institution | Directory Open Access Journal |
| issn | 2666-0334 |
| language | English |
| last_indexed | 2024-12-19T19:42:44Z |
| publishDate | 2021-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Quaternary Science Advances |
| spelling | doaj.art-2b07857778f64986bacb551eed58a6e32022-12-21T20:08:13ZengElsevierQuaternary Science Advances2666-03342021-04-013100016Persistent millennial-scale climate variability in Southern Europe during Marine Isotope Stage 6G.P. Wilson0M.R. Frogley1P.D. Hughes2K.H. Roucoux3V. Margari4T.D. Jones5M.J. Leng6P.C. Tzedakis7Department of Geography & International Development, University of Chester, Chester, CH1 4BJ, UK; Corresponding author.Department of Geography, University of Sussex, Brighton, BN1 9QJ, UKDepartment of Geography, The University of Manchester, Manchester, M13 9PL, UKSchool of Geography & Sustainable Development, University of St Andrews, St Andrews, KY16 9AL, UKEnvironmental Change Research Centre, Department of Geography, University College London, London, WC1E 6BY, UKAECOM, Birmingham, B4 6AT, UKNational Environmental Isotope Facility, British Geological Survey, Nottingham, NG12 5GG, UK; School of Biosciences, University of Nottingham, Nottingham, LE12 5RD, UKEnvironmental Change Research Centre, Department of Geography, University College London, London, WC1E 6BY, UKExploring 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.http://www.sciencedirect.com/science/article/pii/S2666033420300162Marine Isotope Stage 6Southern EuropeMillennial-scale climate variability |
| spellingShingle | G.P. Wilson M.R. Frogley P.D. Hughes K.H. Roucoux V. Margari T.D. Jones M.J. Leng P.C. Tzedakis Persistent millennial-scale climate variability in Southern Europe during Marine Isotope Stage 6 Quaternary Science Advances Marine Isotope Stage 6 Southern Europe Millennial-scale climate variability |
| title | Persistent millennial-scale climate variability in Southern Europe during Marine Isotope Stage 6 |
| title_full | Persistent millennial-scale climate variability in Southern Europe during Marine Isotope Stage 6 |
| title_fullStr | Persistent millennial-scale climate variability in Southern Europe during Marine Isotope Stage 6 |
| title_full_unstemmed | Persistent millennial-scale climate variability in Southern Europe during Marine Isotope Stage 6 |
| title_short | Persistent millennial-scale climate variability in Southern Europe during Marine Isotope Stage 6 |
| title_sort | persistent millennial scale climate variability in southern europe during marine isotope stage 6 |
| topic | Marine Isotope Stage 6 Southern Europe Millennial-scale climate variability |
| url | http://www.sciencedirect.com/science/article/pii/S2666033420300162 |
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