Journal cover Journal topic
Climate of the Past An interactive open-access journal of the European Geosciences Union
doi:10.5194/cp-2017-31
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
17 Mar 2017
Review status
This discussion paper is under review for the journal Climate of the Past (CP).
Low-resolution Australasian palaeoclimate records of the last 2000 years
Bronwyn C. Dixon1, Jonathan J. Tyler2, Andrew M. Lorrey3, Ian D. Goodwin4, Joëlle Gergis5, and Russell N. Drysdale1 1School of Geography, University of Melbourne, Melbourne, 3010, Australia
2Department of Earth Sciences, University of Adelaide, Adelaide, 5005, Australia
3National Institute of Water and Atmospheric Research, Auckland, 1010, New Zealand
4Marine Climate Risk Group and Department of Environmental Sciences, Macquarie University, Sydney, 2109, Australia
5School of Earth Sciences, University of Melbourne, Melbourne, 3010, Australia
Abstract. Non-annually resolved palaeoclimate records in the Australasian region were compiled to facilitate investigations of decadal to centennial climate variability over the past 2000 years. A total of 661 lake/wetland, geomorphic, marine, and speleothem records were identified and then assessed against a set of a priori criteria based on temporal resolution, record length, dating methods, and confidence of the proxy-climate relationship over the Common Era. A high quality subset of 22 records across Australasia met the criteria and they are endorsed for subsequent analyses. New chronologies based on progressive Bayesian techniques were constructed for the high quality records to ensure a consistent approach to age modelling and quantification of age uncertainties. Chronological uncertainty was the primary reason why records did not meet the selection criteria. Despite present limitations, existing proxies and reconstruction techniques that successfully capture climate variability in the region show potential to address spatial gaps and expand the range of climate variables covering the last 2000 years from the Australasian region.

Citation: Dixon, B. C., Tyler, J. J., Lorrey, A. M., Goodwin, I. D., Gergis, J., and Drysdale, R. N.: Low-resolution Australasian palaeoclimate records of the last 2000 years, Clim. Past Discuss., doi:10.5194/cp-2017-31, in review, 2017.
Bronwyn C. Dixon et al.
Bronwyn C. Dixon et al.
Bronwyn C. Dixon et al.

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Short summary
Existing sedimentary palaeoclimate records in Australasia were assessed for suitability for examining the last two millennia. A small number of high-quality records were identified, and new Bayesian age models were constructed for each record. Findings suggest that Australasian record chronologies and confidence in proxy-climate relationships are the main factors limiting appropriate data for examining Common Era climate variability. Recommendations for improving data accessibility are provided.
Existing sedimentary palaeoclimate records in Australasia were assessed for suitability for...
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