Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial.
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Authors
Drysdale, RN
Margari, V
Taschetto, AS
Crowhurst, SJ
Grimalt, JO
McManus, JF
Martrat, B
Mokeddem, Z
Parrenin, F
Regattieri, E
Roe, K
Zanchetta, G
Publication Date
2018-10-12Journal Title
Nat Commun
ISSN
2041-1723
Publisher
Springer Science and Business Media LLC
Volume
9
Issue
1
Pages
4235
Language
eng
Type
Article
Physical Medium
Electronic
Metadata
Show full item recordCitation
Tzedakis, P., Drysdale, R., Margari, V., Skinner, L., Menviel, L., Rhodes, R., Taschetto, A., et al. (2018). Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial.. Nat Commun, 9 (1), 4235. https://doi.org/10.1038/s41467-018-06683-3
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.
Sponsorship
Royal Society (RP120096)
Natural Environment Research Council (NE/G007535/1)
Identifiers
External DOI: https://doi.org/10.1038/s41467-018-06683-3
This record's URL: https://www.repository.cam.ac.uk/handle/1810/285796
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