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Title: Past hydroclimatic variability from southwest Australian speleothems during the last millennium
Authors: Treble, PC
Baker, AA
Griffiths, AD
Hellstrom, JC
Bajo, P
Abram, N
Fairchild, IJ
Borsato, A
Markowska, M
Gagan, MK
Keywords: Western Australia
Isotope ratio
Issue Date: 10-Dec-2018
Publisher: Australiasian Quaternary Association Inc.
Citation: Treble, P., Baker, A., Griffiths, A., Hellstrom, J., Bajo, P., Abram, N., Fairchild, I., Borsato, A., Markswska, M., & Gagan, M. (2018). Past hydroclimatic variability from southwest Australian speleothems during the last millennium. Paper presented at the AQUA Biennial Conference, Canberra, 10-14 December 2018.
Abstract: Speleothems from Golgotha Cave in SW Western Australia have been investigated to extend our knowledge of past climate variability for this region during the last millennium. O isotopic datasets, the primary paleoclimate proxy used for speleothems, were constructed for four stalagmites. A challenge in their interpretation has been the disagreement between these records, despite representing coeval growth from within the same cave. Resolving this conundrum has necessitated the characterisation of the hydrology, hydrochemistry, rainfall isotopes7 and development of proxy system forward models1,8 for Golgotha Cave. The findings of these studies will be summarised as a conceptual model in order to present the main karst hydrological features that give rise to each stalagmite’s isotopic response to hydroclimatic forcing. The paleoclimate interpretation will focus on the two continuous stalagmite records that were fed predominately by diffuse flow. This will be supported by evidence from the two stalagmites predominantly fed by fracture flow, which has resulted in a non-linear response to hydroclimatic forcing.
Gov't Doc #: 9653
Appears in Collections:Conference Publications

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