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

^*Corresponding author for this work

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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
DOIs	https://doi.org/10.1038/s41467-018-06683-3
Publication status	Published - 12 Oct 2018

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Copyright the Author(s) 2018. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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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, [4235]. https://doi.org/10.1038/s41467-018-06683-3

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. / Enhanced climate instability in the North Atlantic and southern Europe during the Last Interglacial. In: Nature Communications. 2018 ; Vol. 9.

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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, 4235. https://doi.org/10.1038/s41467-018-06683-3

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

In: Nature Communications, Vol. 9, 4235, 12.10.2018.

Research output: Contribution to journal › Article › peer-review

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AU - Tzedakis, P. C.

AU - Drysdale, R. N.

AU - Margari, V.

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AU - Menviel, L.

AU - Rhodes, R. H.

AU - Taschetto, A. S.

AU - Hodell, D. A.

AU - Crowhurst, S. J.

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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.

N1 - Copyright the Author(s) 2018. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2018/10/12

Y1 - 2018/10/12

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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JO - Nature Communications

JF - Nature Communications

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

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