Kangaroo Island climate variation over the past 7000 years reconstructed using lake sediment

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dc.contributor.authorKamleh, C.
dc.contributor.schoolSchool of Physical Sciencesen
dc.date.issued2022
dc.descriptionThis item is only available electronically. Whole thesis (as available).
dc.description.abstractIn the face of devasting bushfires, droughts and floods in recent years in Australia, geologically recent Australian climate reconstructions provide useful context in understanding the long-term patterns of such events before instrumental records existed. There is a lack of such climate reconstructions in southern Australia. Kangaroo Island’s (KI) recent devastation by bushfires, as well as the presence of semi-permanent lakes on the island, make it a location suited for climate reconstructions using lake sediment to complement the understanding of bushfire occurrence. Existing research has focussed on Lashmars Lagoon in the east of KI, and this thesis adds to Lashmars Lagoon research, while also adding research from Little Grassdale Lagoon in the west of KI. Multiple techniques are used: 210Pb dating, radiocarbon dating, age-depth modelling, X-ray fluorescence (XRF), and mass-spectrometry. It is found that over the past 7000 years, Kangaroo Island entered a drier period after ~3000 years BP. This dry period coincides with the onset of more intense bushfires on Kangaroo Island, as recognised by existing research, suggesting a climatic control on bushfire patterns. The last 2000 years on Kangaroo Island are characterised by more variable climatic conditions, and there are fluctuations between wet and dry climates, within the larger context of a dry period.
dc.description.dissertationThesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, YEAR
dc.identifier.urihttps://hdl.handle.net/2440/146273
dc.language.isoen
dc.provenanceThis electronic version is made publicly available by the University of Adelaide in accordance with its open access policy for student theses. Copyright in this thesis remains with the author. This thesis may incorporate third party material which has been used by the author pursuant to Fair Dealing exceptions. If you are the author of this thesis and do not wish it to be made publicly available, or you are the owner of any included third party copyright material you wish to be removed from this electronic version, please complete the take down form located at: http://www.adelaide.edu.au/legalsen
dc.subjectHonours
dc.subjectGeology
dc.subjectKangaroo Island
dc.subjectHolocene
dc.subjectclimate’ isotopes
dc.subjectXRF
dc.subjectchronology
dc.subjectmass-spectrometry
dc.subjectbushfires
dc.titleKangaroo Island climate variation over the past 7000 years reconstructed using lake sediment
dc.typeThesis

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