Radiometrically dated speleothem records of Terminations IV and V and linkages to the North Atlantic

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dc.contributor.authorPollard, Ten_AU
dc.contributor.authorDrysdale, RNen_AU
dc.contributor.authorWoodhead, JDen_AU
dc.contributor.authorEdwards, RLen_AU
dc.contributor.authorHellstrom, JCen_AU
dc.contributor.authorCheng, Hen_AU
dc.contributor.authorDux, Fen_AU
dc.contributor.authorDaëron, Men_AU
dc.contributor.authorLi, XLen_AU
dc.contributor.authorWong, HKYen_AU
dc.contributor.authorCouchoud, Ien_AU
dc.contributor.authorRegattieri, Een_AU
dc.contributor.authorZanchetta, Gen_AU
dc.contributor.authorIsola, Ien_AU
dc.date.accessioned2024-05-01T07:18:53Zen_AU
dc.date.available2024-05-01T07:18:53Zen_AU
dc.date.issued2019-07-28en_AU
dc.date.statistics2023-04-14en_AU
dc.description.abstractPaleoclimate archives tied to accurate and precise chronologies are crucial for developing a dynamical understanding of the causes and nature of Quaternary glacial terminations [1]. While numerous well-dated archives provide good chronological control through Terminations I and II, there is presently a lack of well-dated records spanning earlier terminations. A notable exception to this is a suite of remarkably well-dated Chinese speleothems that have been used to date the commencement of each termination over the past 640 kyr [2,3]. This has been achieved by correlating weak Asian Monsoon anomalies as captured by speleothem oxygen isotope signals with terminal Heinrich events in the North Atlantic. While this approach is well-suited to testing orbital hypothesis by comparing the timing of termination commencement with insolation metrics, it only provides precise age control at the beginning of each termination. This precludes assessment of the progression of climatic changes over the full course of the termination, and the timing at which full interglacial conditions are reached. Here we present a composite speleothem record spanning glacial terminations IV and V from the Antro del Corchia cave system located on the western coast of central Italy. This record is anchored to a uranium-thorium based chronology and contains numerous proxies representing both local and regional climate, including Δ47-based temperature data derived from a pool carbonate formed under very slow degassing conditions. By taking advantage of established links between speleothem proxies from this cave site and marine proxies from the North Atlantic, we fix the marine sediment data to a radiometric age scale. This allows us to constrain the timing of ocean circulation and SST changes occurring in the North Atlantic throughout the duration of Terminations IV and V, and compare these with terrestrial temperatures in central Italy. © The Authors.en_AU
dc.identifier.citationPollard, T., Drysdale, R., Woodhead, J., Edwards, R. L., Hellstrom, J., Cheng, H., Dux, F., Daëron, M., Li, X., Wong, H., Couchoud, I., Regattieri, E., Zanchetta, G., & Isola, I. (2019). Radiometrically dated speleothem records of Terminations IV and V and linkages to the North Atlantic. Poster presented to the 20th INQUA Congress 25th - 31st July 2019, Dublin, Ireland. Retrieved from: https://virtual.oxfordabstracts.com/#/event/public/574/submission/1569en_AU
dc.identifier.conferenceenddate2019-07-31en_AU
dc.identifier.conferencename20th INQUA Congress 2019en_AU
dc.identifier.conferenceplaceDublin, Irelanden_AU
dc.identifier.conferencestartdate2019-07-25en_AU
dc.identifier.urihttps://virtual.oxfordabstracts.com/#/event/public/574/submission/1569en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15567en_AU
dc.language.isoenen_AU
dc.publisherInternational Union for Quaternary Research (INQUA)en_AU
dc.subjectRecords managementen_AU
dc.subjectQuaternary perioden_AU
dc.subjectGlaciersen_AU
dc.subjectChinaen_AU
dc.subjectHypothesisen_AU
dc.subjectClimatic changeen_AU
dc.subjectCavesen_AU
dc.subjectItalyen_AU
dc.subjectSedimentsen_AU
dc.titleRadiometrically dated speleothem records of Terminations IV and V and linkages to the North Atlanticen_AU
dc.typeConference Posteren_AU
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