Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial

P. C. Tzedakis; R. N. Drysdale; V. Margari; L. C. Skinner; L. Menviel; R. H. Rhodes; A. S. Taschetto; D. A. Hodell; S. J. Crowhurst; J. C. Hellstrom; A. E. Fallick; J. O. Grimalt; J. F. Mcmanus; B. Martrat; Z. Mokeddem; F. Parrenin; E. Regattieri; K. Roe; G. Zanchetta

doi:10.1038/s41467-018-06683-3

Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial

P. C. Tzedakis, R. N. Drysdale, V. Margari, L. C. Skinner, L. Menviel, R. H. Rhodes, A. S. Taschetto, D. A. Hodell, S. J. Crowhurst, J. C. Hellstrom, A. E. Fallick, J. O. Grimalt, J. F. Mcmanus, B. Martrat, Z. Mokeddem, F. Parrenin, E. Regattieri, K. Roe, G. Zanchetta

Geography and Environmental Sciences Department

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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.

Original language	English
Article number	4235
Number of pages	14
Journal	Nature Communications
Volume	9
Issue number	1
Early online date	12 Oct 2018
DOIs	https://doi.org/10.1038/s41467-018-06683-3
Publication status	Published - 1 Dec 2018

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Tzedakis et al - Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial OAFinal published version, 2.23 MBLicence: CC BY

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Tzedakis, P. C., Drysdale, R. N., Margari, V., Skinner, L. C., Menviel, L., Rhodes, R. H., Taschetto, A. S., Hodell, D. A., Crowhurst, S. J., Hellstrom, J. C., Fallick, A. E., Grimalt, J. O., Mcmanus, J. F., Martrat, B., Mokeddem, Z., Parrenin, F., Regattieri, E., Roe, K., & Zanchetta, G. (2018). Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial. Nature Communications, 9(1), Article 4235. https://doi.org/10.1038/s41467-018-06683-3

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title = "Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial",

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.",

author = "Tzedakis, {P. C.} and Drysdale, {R. N.} and V. Margari and Skinner, {L. C.} and L. Menviel and Rhodes, {R. H.} and Taschetto, {A. S.} and Hodell, {D. A.} and Crowhurst, {S. J.} and Hellstrom, {J. C.} and Fallick, {A. E.} and Grimalt, {J. O.} and Mcmanus, {J. F.} and B. Martrat and Z. Mokeddem and F. Parrenin and E. Regattieri and K. Roe and G. Zanchetta",

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Tzedakis, PC, Drysdale, RN, Margari, V, Skinner, LC, Menviel, L, Rhodes, RH, Taschetto, AS, Hodell, DA, Crowhurst, SJ, Hellstrom, JC, Fallick, AE, Grimalt, JO, Mcmanus, JF, Martrat, B, Mokeddem, Z, Parrenin, F, Regattieri, E, Roe, K & Zanchetta, G 2018, 'Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial', Nature Communications, vol. 9, no. 1, 4235. https://doi.org/10.1038/s41467-018-06683-3

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AU - Tzedakis, P. C.

AU - Drysdale, R. N.

AU - Margari, V.

AU - Skinner, L. C.

AU - Menviel, L.

AU - Rhodes, R. H.

AU - Taschetto, A. S.

AU - Hodell, D. A.

AU - Crowhurst, S. J.

AU - Hellstrom, J. C.

AU - Fallick, A. E.

AU - Grimalt, J. O.

AU - Mcmanus, J. F.

AU - Martrat, B.

AU - Mokeddem, Z.

AU - Parrenin, F.

AU - Regattieri, E.

AU - Roe, K.

AU - Zanchetta, G.

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N2 - 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.

AB - 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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VL - 9

JO - Nature Communications

JF - Nature Communications

IS - 1

M1 - 4235

ER -

Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial

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