Late Quaternary mega-lakes fed by the northern and southern river systems of central Australia: varying moisture sources and increased continental aridity
Optically stimulated and thermoluminescence ages from relict shorelines, along with accelerator mass spectrometer 14C 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...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:303533 2023-05-15T18:25:37+02:00 Late Quaternary mega-lakes fed by the northern and southern river systems of central Australia: varying moisture sources and increased continental aridity Cohen, 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. 2012-10-01 https://espace.library.uq.edu.au/view/UQ:303533 eng eng Elsevier doi:10.1016/j.palaeo.2011.06.023 issn:0031-0182 issn:1872-616X Mega-lake Megafauna OSL Palaeoshoreline Lake Frome Lake Eyre Journal Article 2012 ftunivqespace https://doi.org/10.1016/j.palaeo.2011.06.023 2020-10-27T01:48:49Z Optically stimulated and thermoluminescence ages from relict shorelines, along with accelerator mass spectrometer 14C 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 105ka, confirming that Lakes Mega-Frome and Mega-Eyre were joined to create the largest system of palaeolakes on the Australian continent as recently as 50-47ka. The palaeohydrological record indicates a progressive shift to more arid conditions, with marked drying after 45ka. Subsequently, Lake Mega-Frome has filled independently at 33-31ka 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. Article in Journal/Newspaper Southern Ocean The University of Queensland: UQ eSpace Southern Ocean Palaeogeography, Palaeoclimatology, Palaeoecology 356-357 89 108 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Mega-lake Megafauna OSL Palaeoshoreline Lake Frome Lake Eyre |
spellingShingle |
Mega-lake Megafauna OSL Palaeoshoreline Lake Frome Lake Eyre Cohen, 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. Late Quaternary mega-lakes fed by the northern and southern river systems of central Australia: varying moisture sources and increased continental aridity |
topic_facet |
Mega-lake Megafauna OSL Palaeoshoreline Lake Frome Lake Eyre |
description |
Optically stimulated and thermoluminescence ages from relict shorelines, along with accelerator mass spectrometer 14C 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 105ka, confirming that Lakes Mega-Frome and Mega-Eyre were joined to create the largest system of palaeolakes on the Australian continent as recently as 50-47ka. The palaeohydrological record indicates a progressive shift to more arid conditions, with marked drying after 45ka. Subsequently, Lake Mega-Frome has filled independently at 33-31ka 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. |
format |
Article in Journal/Newspaper |
author |
Cohen, 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. |
author_facet |
Cohen, 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. |
author_sort |
Cohen, T. J. |
title |
Late Quaternary mega-lakes fed by the northern and southern river systems of central Australia: varying moisture sources and increased continental aridity |
title_short |
Late Quaternary mega-lakes fed by the northern and southern river systems of central Australia: varying moisture sources and increased continental aridity |
title_full |
Late Quaternary mega-lakes fed by the northern and southern river systems of central Australia: varying moisture sources and increased continental aridity |
title_fullStr |
Late Quaternary mega-lakes fed by the northern and southern river systems of central Australia: varying moisture sources and increased continental aridity |
title_full_unstemmed |
Late Quaternary mega-lakes fed by the northern and southern river systems of central Australia: varying moisture sources and increased continental aridity |
title_sort |
late quaternary mega-lakes fed by the northern and southern river systems of central australia: varying moisture sources and increased continental aridity |
publisher |
Elsevier |
publishDate |
2012 |
url |
https://espace.library.uq.edu.au/view/UQ:303533 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
doi:10.1016/j.palaeo.2011.06.023 issn:0031-0182 issn:1872-616X |
op_doi |
https://doi.org/10.1016/j.palaeo.2011.06.023 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
356-357 |
container_start_page |
89 |
op_container_end_page |
108 |
_version_ |
1766207182147158016 |