Independent Bayesian age modelling in subtropical wetlands to assess the influence of global climate drivers across Australia

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dc.contributor.authorLewis, RJen_AU
dc.contributor.authorTibby, Jen_AU
dc.contributor.authorArnold, LJen_AU
dc.contributor.authorBarr, Cen_AU
dc.contributor.authorMarshall, JCen_AU
dc.contributor.authorMcGregor, GBen_AU
dc.contributor.authorGadd, PSen_AU
dc.date.accessioned2020-06-11T04:18:59Zen_AU
dc.date.available2020-06-11T04:18:59Zen_AU
dc.date.issued2018-12-10en_AU
dc.date.statistics2020-06-01en_AU
dc.description.abstractRigorously dated, continuous sedimentological records capturing multiple glacial/interglacial cycles are important for evaluating the magnitude and range of drivers influencing ecosystem change in Australia. Multi-proxy palaeoenvironmental reconstructions are commonly used to identify changes in long-term environmental conditions, particularly when exploring the climatic backdrop to Australia’s large scale faunal extinctions. However, interpretations of these records may not be straightforward as local and regional climate signals are often mixed in proxy records. In order to evaluate whether improved temporal constraint can help with differentiating such convoluted signals, thereby increasing the confidence placed in the role of teleconnections across the Southern Hemisphere, we present a comprehensively dated 12.7 m (basal age ~130 ka) wetland core consisting of 21 optically stimulated luminescence and seven radiocarbon ages from North Stradbroke Island. The amalgamation of stratigraphic information and independent age constraints within a Bayesian framework, highlights the complex depositional history of Welsby Lagoon between late MIS 5 and MIS 2. ITRAX core scanning data reveals fluctuations in elemental abundance through time, in particular the decrease in the amount of aeolian sediment following MIS 3. Variability is attributed to regional environmental regime changes controlled by global drivers, including Heinrich events, and the influence of moisture across mainland Australia. The comprehensive dating approach undertaken at Welsby Lagoon highlights the role that the terrestrial palaeoenvironmental records of North Stradbroke Island can play in assessing long-term climate drivers across continental Australia, without relying exclusively on isotopic tuning of remote (ice core or marine) records. © The Authorsen_AU
dc.identifier.citationLewis, R., Tibby, J, Arnold, L., Barr, C., Marshall, J., McGregor. G., & Gadd, P. (2018). Independent Bayesian age modelling in subtropical wetlands to assess the influence of global climate drivers across Australia. Paper presented at the AQUA Biennial Conference, Canberra, 10-14 December 2018, (pp. 44). https://aqua.org.au/wp-content/uploads/2019/10/AQUA-2018-Program.pdfen_AU
dc.identifier.conferenceenddate14 December 2018en_AU
dc.identifier.conferencenameAQUA Biennial Conferenceen_AU
dc.identifier.conferenceplaceCanberra, Australiaen_AU
dc.identifier.conferencestartdate10 December 2018en_AU
dc.identifier.govdoc9635en_AU
dc.identifier.pagination44en_AU
dc.identifier.urihttps://aqua.org.au/wp-content/uploads/2019/10/AQUA-2018-Program.pdfen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/9571en_AU
dc.language.isoenen_AU
dc.publisherAustralasiain Quaternary Association Incen_AU
dc.subjectAge estimationen_AU
dc.subjectAustraliaen_AU
dc.subjectWetlandsen_AU
dc.subjectAquatic ecosystemsen_AU
dc.subjectSurface watersen_AU
dc.subjectGlaciersen_AU
dc.subjectQuaternary perioden_AU
dc.subjectEnvironmenten_AU
dc.subjectSouthern Hemisphereen_AU
dc.subjectCarbon 14en_AU
dc.titleIndependent Bayesian age modelling in subtropical wetlands to assess the influence of global climate drivers across Australiaen_AU
dc.typeConference Abstracten_AU
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