Phasing and amplitude of sea-level and climate change during the penultimate interglacial

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dc.contributor.authorDutton, Aen_AU
dc.contributor.authorBard, Een_AU
dc.contributor.authorAntonioli, Fen_AU
dc.contributor.authorEsat, TMen_AU
dc.contributor.authorLambeck, Ken_AU
dc.contributor.authorMcCulloch, MTen_AU
dc.date.accessioned2010-02-08en_AU
dc.date.accessioned2010-04-30T05:05:20Zen_AU
dc.date.available2010-02-08en_AU
dc.date.available2010-04-30T05:05:20Zen_AU
dc.date.issued2009-05en_AU
dc.date.statistics2009-05en_AU
dc.description.abstractEarth's climate has oscillated between short-lived interglacial and extended glacial periods for the past million years. Before the last interglacial, absolutely dated markers of sea level become increasingly rare; hence, our knowledge of sea-level change driven by the waxing and waning of continental ice sheets before that time is largely based on proxy records from deep-sea cores(1-3) that lack direct age control. Here we present precise U-Th ages for a remarkable collection of submerged speleothems(4,5) from Italy, which record three sea-level highstands during the penultimate interglacial period, Marine Isotope Stage 7, from 245,000 to 190,000 years ago. We find that sea level rose above-18m (relative to modern sea level) several thousand years before maximum Northern Hemisphere insolation during the first and third highstands. In contrast, the second highstand, Marine Isotope Stage 7.3, is essentially synchronous with the insolation maximum, and sea level during this highstand only peaked at about 18 m, even though the concurrent insolation forcing was the strongest of the three highstands. We attribute the different phasing and amplitude of the Marine Isotope Stage 7.3 highstand to the extensive continental glaciation that preceded it. This finding highlights the significance of cryosphere response time to the climate system. © 2009, Nature Publishing Group.en_AU
dc.identifier.citationDutton, A., Bard, E., Antonioli, F., Esat, T. M., Lambeck, K., & McCulloch, M. T. (2009). Phasing and amplitude of sea-level and climate change during the penultimate interglacial. Nature Geoscience, 2(5), 355-359. doi:10.1038/ngeo470en_AU
dc.identifier.govdoc1348en_AU
dc.identifier.issn1752-0894en_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitleNature Geoscienceen_AU
dc.identifier.pagination355-359en_AU
dc.identifier.urihttp://dx.doi.org/10.1038/NGEO470en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2850en_AU
dc.identifier.volume2en_AU
dc.language.isoenen_AU
dc.publisherNature Publishing Groupen_AU
dc.subjectSea levelen_AU
dc.subjectClimatic changeen_AU
dc.subjectUnderwateren_AU
dc.subjectAmplitudesen_AU
dc.subjectCryosphereen_AU
dc.subjectItalyen_AU
dc.titlePhasing and amplitude of sea-level and climate change during the penultimate interglacialen_AU
dc.typeJournal Articleen_AU
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