Late-Holocene climatic variability indicated by three natural archives in arid southern Australia

Gliganic, Luke A., Cohen, Timothy J., May, Jan-Hendrik, Jansen, John D., Nanson, Gerald C., Dosseto, Anthony, Larsen, Josh R. and Aubert, Maxime (2014) Late-Holocene climatic variability indicated by three natural archives in arid southern Australia Wollongong, NSW Australia: University of Wollongong: Research Online

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Name Description MIMEType Size Downloads
Author Gliganic, Luke A.
Cohen, Timothy J.
May, Jan-Hendrik
Jansen, John D.
Nanson, Gerald C.
Dosseto, Anthony
Larsen, Josh R.
Aubert, Maxime
Title of report Late-Holocene climatic variability indicated by three natural archives in arid southern Australia
Parent publication University of Wollongong.
Publication date 2014
Year available 2014
Publisher University of Wollongong: Research Online
Series UOW Faculty of Science, Medicine and Health - Papers
Place of publication Wollongong, NSW Australia
Total pages 41
Collection year 2015
Language eng
Formatted abstract
Three terrestrial climate proxies are used to investigate the evolution of Holocene palaeoenvironments in southern central Australia, all of which present a coherent record of palaeohydrology. Single-grain optically stimulated luminescence from sediments supplemented by 14C from charcoal and lacustrine shells was obtained to date shoreline deposits (Lake Callabonna) and the adjacent Mt Chambers Creek alluvial fan. Our findings are complemented by a U/Th-based record of speleothem growth in the Mt Chambers Creek catchment, which we interpret to reflect increased precipitation. Together, these archives shed light on the timing of, and possible sources of water for, Holocene pluvial intervals. We identified several phases of elevated lake levels dated at ~5.8-5.2, 4.5, 3.5-2.7 and 1 kyr, most of which correspond to fluvial activity resulting from increased precipitation in the adjacent ranges. The enhanced hydrology during phases of the late Holocene likely increased the reliability of resources for regional human populations during a time of reduced winter rainfall. When considered within the framework of the current understanding of Holocene palaeoclimate in central Australia, our data suggest that the pattern of landscape response was broadly synchronous with larger scale climatic variability and punctuated by pluvial periods greater than today.
Keyword Southern
Arid
Archives
Natural
Australia
Climatic
Holocene
Q-Index Code KX
Q-Index Status Provisional Code
Institutional Status UQ

 
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Created: Wed, 22 Jan 2014, 09:42:28 EST by Ms May Balagaize on behalf of School of Geography, Planning & Env Management