01996nas a2200361   4500000000100000008004100001260001500042100001600057700001600073700001500089700001500104700001500119700001400134700001700148700001400165700001700179700001700196700001500213700001500228700001500243700001500258700001600273700001600289700001800305700001100323700001700334245010400351856004700455300000900502490000600511520110300517020001401620       2018                            d  c2018/10/121 aP. Tzedakis1 aR. Drysdale1 aV. Margari1 aL. Skinner1 aL. Menviel1 aR. Rhodes1 aA. Taschetto1 aD. Hodell1 aS. Crowhurst1 aJ. Hellstrom1 aA. Fallick1 aJ. Grimalt1 aJ. McManus1 aB. Martrat1 aZ. Mokeddem1 aF. Parrenin1 aE. Regattieri1 aK. Roe1 aG. Zanchetta00aEnhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial  uhttps://doi.org/10.1038/s41467-018-06683-3  a42350 v93 a<p> 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.</p>  a2041-1723