Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial.
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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.. Nature communications, 9 (1), 4235. https://doi.org/10.1038/s41467-018-06683-3
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.
Royal Society (RP120096)
External DOI: https://doi.org/10.1038/s41467-018-06683-3
This record's URL: https://www.repository.cam.ac.uk/handle/1810/285796
Attribution 4.0 International
Licence URL: https://creativecommons.org/licenses/by/4.0/