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Quaternary climatic instability in south-east Australia from a multi-proxy speleothem record

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Quaternary climatic instability in south-east Australia from a multi-proxy speleothem record. / Webb, Megan; Dredge, J.; Barker, Philip; Mueller, W.; Jex, C.; Desmarchelier, J.; Hellstrom, J.; Wynn, Peter.

In: Journal of Quaternary Science, Vol. 29, No. 6, 08.2014, p. 589-596.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Webb, M, Dredge, J, Barker, P, Mueller, W, Jex, C, Desmarchelier, J, Hellstrom, J & Wynn, P 2014, 'Quaternary climatic instability in south-east Australia from a multi-proxy speleothem record', Journal of Quaternary Science, vol. 29, no. 6, pp. 589-596. https://doi.org/10.1002/jqs.2734

APA

Webb, M., Dredge, J., Barker, P., Mueller, W., Jex, C., Desmarchelier, J., Hellstrom, J., & Wynn, P. (2014). Quaternary climatic instability in south-east Australia from a multi-proxy speleothem record. Journal of Quaternary Science, 29(6), 589-596. https://doi.org/10.1002/jqs.2734

Vancouver

Webb M, Dredge J, Barker P, Mueller W, Jex C, Desmarchelier J et al. Quaternary climatic instability in south-east Australia from a multi-proxy speleothem record. Journal of Quaternary Science. 2014 Aug;29(6):589-596. https://doi.org/10.1002/jqs.2734

Author

Webb, Megan ; Dredge, J. ; Barker, Philip ; Mueller, W. ; Jex, C. ; Desmarchelier, J. ; Hellstrom, J. ; Wynn, Peter. / Quaternary climatic instability in south-east Australia from a multi-proxy speleothem record. In: Journal of Quaternary Science. 2014 ; Vol. 29, No. 6. pp. 589-596.

Bibtex

@article{6668c12b0be047358888d989a3303d6c,
title = "Quaternary climatic instability in south-east Australia from a multi-proxy speleothem record",
abstract = "Milankovitch-scale Quaternary climatic oscillations within south-east Australia are known to be characterized by relatively arid glacial and wet interglacial stages. However, terrestrial proxy records of environmental change are scarce, based largely on river terraces, dune sediments and pollen sequences. Here we present a speleothem-based palaeoclimate record from Yarrangobilly caves, south-east Australia. The oxygen isotopic composition of calcite (δ18Ocalcite) is taken to represent rainfall amount and used as an aridity index. High-resolution trace element profiles and UV fluorescence support interpretations based on δ18Ocalcite, allowing further designation of key phases of speleothem growth into periods of relative aridity and moisture excess. A hiatus of approximately 37 ka duration divides the record into two key phases of growth which can be mapped onto marine isotope stages 5c–a and 3, respectively. Increasing aridity in the latter half of MIS 5 led to cessation of speleothem growth for the duration of MIS 4. Growth recommences during MIS 3, associated with greater moisture availability, enhanced vegetation and augmented biogeochemical cycling. This speleothem record provides a unique context of terrestrial environmental change and depicts hydrological conditions which fluctuate markedly over the 70-ka period covering the time of megafauna extinction and human arrival on the continent.",
keywords = "Australia, climate, megafauna, speleothem, Yarrangobilly",
author = "Megan Webb and J. Dredge and Philip Barker and W. Mueller and C. Jex and J. Desmarchelier and J. Hellstrom and Peter Wynn",
year = "2014",
month = aug,
doi = "10.1002/jqs.2734",
language = "English",
volume = "29",
pages = "589--596",
journal = "Journal of Quaternary Science",
issn = "0267-8179",
publisher = "John Wiley and Sons Ltd",
number = "6",

}

RIS

TY - JOUR

T1 - Quaternary climatic instability in south-east Australia from a multi-proxy speleothem record

AU - Webb, Megan

AU - Dredge, J.

AU - Barker, Philip

AU - Mueller, W.

AU - Jex, C.

AU - Desmarchelier, J.

AU - Hellstrom, J.

AU - Wynn, Peter

PY - 2014/8

Y1 - 2014/8

N2 - Milankovitch-scale Quaternary climatic oscillations within south-east Australia are known to be characterized by relatively arid glacial and wet interglacial stages. However, terrestrial proxy records of environmental change are scarce, based largely on river terraces, dune sediments and pollen sequences. Here we present a speleothem-based palaeoclimate record from Yarrangobilly caves, south-east Australia. The oxygen isotopic composition of calcite (δ18Ocalcite) is taken to represent rainfall amount and used as an aridity index. High-resolution trace element profiles and UV fluorescence support interpretations based on δ18Ocalcite, allowing further designation of key phases of speleothem growth into periods of relative aridity and moisture excess. A hiatus of approximately 37 ka duration divides the record into two key phases of growth which can be mapped onto marine isotope stages 5c–a and 3, respectively. Increasing aridity in the latter half of MIS 5 led to cessation of speleothem growth for the duration of MIS 4. Growth recommences during MIS 3, associated with greater moisture availability, enhanced vegetation and augmented biogeochemical cycling. This speleothem record provides a unique context of terrestrial environmental change and depicts hydrological conditions which fluctuate markedly over the 70-ka period covering the time of megafauna extinction and human arrival on the continent.

AB - Milankovitch-scale Quaternary climatic oscillations within south-east Australia are known to be characterized by relatively arid glacial and wet interglacial stages. However, terrestrial proxy records of environmental change are scarce, based largely on river terraces, dune sediments and pollen sequences. Here we present a speleothem-based palaeoclimate record from Yarrangobilly caves, south-east Australia. The oxygen isotopic composition of calcite (δ18Ocalcite) is taken to represent rainfall amount and used as an aridity index. High-resolution trace element profiles and UV fluorescence support interpretations based on δ18Ocalcite, allowing further designation of key phases of speleothem growth into periods of relative aridity and moisture excess. A hiatus of approximately 37 ka duration divides the record into two key phases of growth which can be mapped onto marine isotope stages 5c–a and 3, respectively. Increasing aridity in the latter half of MIS 5 led to cessation of speleothem growth for the duration of MIS 4. Growth recommences during MIS 3, associated with greater moisture availability, enhanced vegetation and augmented biogeochemical cycling. This speleothem record provides a unique context of terrestrial environmental change and depicts hydrological conditions which fluctuate markedly over the 70-ka period covering the time of megafauna extinction and human arrival on the continent.

KW - Australia

KW - climate

KW - megafauna

KW - speleothem

KW - Yarrangobilly

U2 - 10.1002/jqs.2734

DO - 10.1002/jqs.2734

M3 - Journal article

VL - 29

SP - 589

EP - 596

JO - Journal of Quaternary Science

JF - Journal of Quaternary Science

SN - 0267-8179

IS - 6

ER -