Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial
| Type | Article | ||||||||||||||||||||||||||||||||
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| Date | 2018-10 | ||||||||||||||||||||||||||||||||
| Language | English | ||||||||||||||||||||||||||||||||
| Author(s) | Tzedakis P. C.1, Drysdale R. N.2, 3, Margari V.1, Skinner L. C.4, Menviel L.5, 6, 7, Rhodes R. H.4, Taschetto A. S.5, 6, Hodell D. A.4, Crowhurst S. J.4, Hellstrom J. C.8, Fallick A. E.9, Grimalt J. O.10, McManus J. F.11, Martrat B.10, Mokeddem Zohra11, Parrenin F.12, Regattieri E.13, Roe K.1, Zanchetta G.13 | ||||||||||||||||||||||||||||||||
| Affiliation(s) | 1 : UCL, Dept Geog, Environm Change Res Ctr, London WC1E 6BT, England. 2 : Univ Melbourne, Sch Geog, Melbourne, Vic 3053, Australia. 3 : Univ Savoie Mt Blanc, Lab EDYTEM UMR CNRS 5204, F-73376 Le Bourget Du Lac, France. 4 : Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England. 5 : Univ New South Wales, Climate Change Res Ctr, Sydney, NSW 2052, Australia. 6 : Univ New South Wales, ARC Ctr Excellence Climate Syst Sci, Sydney, NSW 2052, Australia. 7 : Macquarie Univ, Dept Earth & Planetary Sci, Sydney, NSW 2109, Australia. 8 : Univ Melbourne, Sch Earth Sci, Melbourne, Vic 3010, Australia. 9 : Scottish Univ Environm Res Ctr, E Kilbride G75 0QF, Lanark, Scotland. 10 : Inst Environm Assessment & Water Res IDAEA, Spanish Council Sci Res CSIC, Dept Environm Chem, Barcelona 08034, Spain. 11 : Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA. 12 : Univ Grenoble Alpes, IGE, IRD, CNRS, F-38000 Grenoble, France. 13 : Univ Pisa, Dipartimento Sci Terra, I-56126 Pisa, Italy. |
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| Source | Nature Communications (2041-1723) (Nature Publishing Group), 2018-10 , Vol. 9 , N. 1 , P. 435 (14p.) | ||||||||||||||||||||||||||||||||
| DOI | 10.1038/s41467-018-06683-3 | ||||||||||||||||||||||||||||||||
| WOS© Times Cited | 90 | ||||||||||||||||||||||||||||||||
| Abstract | Considerable ambiguity remains over the extent and nature of millennial/centennial-scale climate instability during the Last Interglacial (LIG). Here we analyse marine and terrestrial proxies from a deep-sea sediment sequence on the Portuguese Margin and combine results with an intensively dated Italian speleothem record and climate-model experiments. The strongest expression of climate variability occurred during the transitions into and out of the LIG. Our records also document a series of multi-centennial intra-interglacial arid events in southern Europe, coherent with cold water-mass expansions in the North Atlantic. The spatial and temporal fingerprints of these changes indicate a reorganization of ocean surface circulation, consistent with low-intensity disruptions of the Atlantic meridional overturning circulation (AMOC). The amplitude of this LIG variability is greater than that observed in Holocene records. Episodic Greenland ice melt and runoff as a result of excess warmth may have contributed to AMOC weakening and increased climate instability throughout the LIG. |
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