Lake Quaternary mega-lakes fed by the northern and southern river systems of central Australia: varying moisture sources and increased continental aridity

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dc.contributor.authorCohen, TJen_AU
dc.contributor.authorNanson, GCen_AU
dc.contributor.authorJansen, JDen_AU
dc.contributor.authorJones, BGen_AU
dc.contributor.authorJacobs, Zen_AU
dc.contributor.authorLarsen, JRen_AU
dc.contributor.authorMay, JHen_AU
dc.contributor.authorTreble, PCen_AU
dc.contributor.authorPrice, DMen_AU
dc.contributor.authorSmith, AMen_AU
dc.date.accessioned2014-04-04T04:52:02Zen_AU
dc.date.available2014-04-04T04:52:02Zen_AU
dc.date.issued2012-10-15en_AU
dc.date.statistics2014-04-04en_AU
dc.description.abstractOptically stimulated and thermoluminescence ages from relict shorelines, along with accelerator mass spectrometer C-14 ages from freshwater molluscs reveal a record of variable moisture sources supplied by northern and southern river systems to Lake Mega-frome in southern central Australia during the late Quaternary. Additional lacustrine, palynological and terrestrial proxies are used to reconstruct a record that extends back to 105 ka, confirming that Lakes Mega-frome and Mega-Eyre were joined to create the largest system of palaeolakes on the Australian continent as recently as 50-47 ka. The palaeohydrological record indicates a progressive shift to more arid conditions, with marked drying after 45 ka. Subsequently, lake Mega-Frome has filled independently at 33-31 ka and at the termination of the Last Glacial Maximum to volumes some 40 times those of today. Further sequentially declining filling episodes (to volumes 25-10 those of today) occurred immediately prior to the Younger Dryas stadial, in the mid Holocene and during the medieval climatic anomaly. Southern hemisphere summer insolation maxima are a poor predictor of palaeolake-filling episodes. An examination of multiple active moisture sources suggests that palaeolake phases were driven independently of insolation and at times by some combination of enhanced Southern Ocean circulation and strengthened tropical moisture sources. © 2012, Elsevier Ltd.en_AU
dc.identifier.citationCohen, T. J., Nanson, G. C., Jansen, J. D., Jones, B. G., Jacobs, Z., Larsen, J. R., May, J. H., Treble, P., Price, D. M., & Smith, A. M. (2012). Lake Quaternary mega-lakes fed by the northern and southern river systems of central Australia: varying moisture sources and increased continental aridity. Palaeogeography Paleaoclimatology Palaeoecology, 356-357, 89-108 (Special Issue SI). doi:10.1016/j.palaeo.2011.06.023en_AU
dc.identifier.govdoc4739en_AU
dc.identifier.issn0031-0182en_AU
dc.identifier.journaltitlePalaeogeography, Paleaoclimatology, Palaeoecologyen_AU
dc.identifier.pagination89-108en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.palaeo.2011.06.023en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5406en_AU
dc.identifier.volume356-357en_AU
dc.language.isoenen_AU
dc.publisherElsevier Science BVen_AU
dc.subjectRiversen_AU
dc.subjectLakesen_AU
dc.subjectAustraliaen_AU
dc.subjectMoistureen_AU
dc.subjectArid landsen_AU
dc.subjectQuaternary perioden_AU
dc.titleLake Quaternary mega-lakes fed by the northern and southern river systems of central Australia: varying moisture sources and increased continental aridityen_AU
dc.typeJournal Articleen_AU
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