Climates of the last three interglacials in subtropical eastern Australia inferred from wetland sediment geochemistry

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dc.contributor.authorKemp, CWen_AU
dc.contributor.authorTibby, Jen_AU
dc.contributor.authorArnold, LJen_AU
dc.contributor.authorBarr, Cen_AU
dc.contributor.authorGadd, PSen_AU
dc.contributor.authorMarshall, JCen_AU
dc.contributor.authorMcGregor, GBen_AU
dc.contributor.authorJacobsen, GEen_AU
dc.date.accessioned2021-06-28T21:31:44Zen_AU
dc.date.available2021-06-28T21:31:44Zen_AU
dc.date.issued2020-01-15en_AU
dc.date.statistics2021-06-17en_AU
dc.description.abstractRecords of Australian climate during Marine Isotope Stages 5 and 7 (130–71 and 243–191 ka) are rare, preventing detailed assessments of long-term climate, drivers and ecological responses across the continent over glacial-interglacial timescales. This study presents a geochemistry-based palaeoclimate record from Fern Gully Lagoon on North Stradbroke Island (also known as Minjerribah) in subtropical eastern Australia, which records climates in MIS 7a–c, MIS 5 and much of the Holocene, in addition to MIS 4 (71–57 ka), and parts of MIS 6, MIS 3 and MIS 2 (191–130, 57–29 and 29–14 ka). Indicators of inorganic sedimentation from a 9.5 m sediment core – focussed on high-resolution estimates of sediment geochemistry supported by x-radiography, inorganic content and magnetic susceptibility – were combined with a chronology consisting of six radiocarbon (14C) and thirteen single-grain optically stimulated luminescence (OSL) ages. Hiatuses occurred at ~178–153 ka, ~36–21 ka and ~7–2 ka and likely result from the wetland drying. Low values of locally sourced aeolian materials indicate a wet MIS 7a–c and early MIS 6 before a relatively dry MIS 5. Inorganic flux during the Holocene was up to four times greater than during MIS 5, consistent with long-term interglacial drying observed in other regions, most notably in central Australia. This study highlights the importance of employing a combination of multiple dating approaches and calibrated geochemical proxies to derive climate reconstructions and to identify depositional complexities in organic-rich wetland records. © 2020 Elsevier B.Ven_AU
dc.identifier.articlenumber109463en_AU
dc.identifier.citationKemp, C. W., Tibby, J., Arnold, L. J., Barr, C., Gadd, P. S., Marshall, J. C., McGregor, G. B. & Jacobsen, G. E. (2020). Climates of the last three interglacials in subtropical eastern Australia inferred from wetland sediment geochemistry. Palaeogeography, Palaeoclimatology, Palaeoecology, 538, 109463. doi:10.1016/j.palaeo.2019.109463en_AU
dc.identifier.issn0031-0182en_AU
dc.identifier.journaltitlePalaeogeography, Palaeoclimatology, Palaeoecologyen_AU
dc.identifier.urihttps://doi.org/10.1016/j.palaeo.2019.109463en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10921en_AU
dc.identifier.volume538en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectX-ray fluorescence analysisen_AU
dc.subjectGeochemistryen_AU
dc.subjectClimatesen_AU
dc.subjectWetlandsen_AU
dc.subjectSedimentsen_AU
dc.subjectQuaternary perioden_AU
dc.subjectIslandsen_AU
dc.subjectQueenslanden_AU
dc.subjectAustraliaen_AU
dc.titleClimates of the last three interglacials in subtropical eastern Australia inferred from wetland sediment geochemistryen_AU
dc.typeJournal Articleen_AU
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