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Continental aridifi...
Continental aridification and the vanishing of Australia's mega-lakes
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- Cohen, Timothy (författare)
- Department of Environment and Geography, Macquarie University, Sydney, NSW 2109, Australia
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Nanson, Gerald (författare)
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- Jansen, John, 1967- (författare)
- School of Geographical and Earth Sciences, University of Glasgow, Glasgow, UK
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Jones, Brian (författare)
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Jacobs, Zenobia (författare)
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Treble, Pauline (författare)
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Price, David (författare)
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May, Jan-Hendrick (författare)
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Smith, Andrew (författare)
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Ayliffe, Linda (författare)
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Hellstrom, John (författare)
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(creator_code:org_t)
- 2011
- 2011
- Engelska.
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Ingår i: Geology. - 0091-7613 .- 1943-2682. ; 39, s. 167-170
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The nature of the Australian climate at about the time of rapid megafaunal extinctions and humans arriving in Australia is poorly understood and is an important element in the contentious debate as to whether humans or climate caused the extinctions. Here we present a new paleoshoreline chronology that extends over the past 100 k.y. for Lake Mega-Frome, the coalescence of Lakes Frome, Blanche, Callabonna and Gregory, in the southern latitudes of central Australia. We show that Lake Mega-Frome was connected for the last time to adjacent Lake Eyre at 50–47 ka, forming the largest remaining interconnected system of paleolakes on the Australian continent. The fi nal disconnection and a progressive drop in the level of Lake Mega-Frome represents a major climate shift to aridifi cation that coincided with the arrival of humans and the demise of the megafauna. The supply of moisture to the Australian continent at various times in the Quaternary has commonly been ascribed to an enhanced monsoon. This study, in combination with other paleoclimate data, provides reliable evidence for peri-ods of enhanced tropical and enhanced Southern Ocean sources of water fi lling these lakes at different times during the last full glacial cycle.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
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- art (ämneskategori)
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Geology
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Cohen, Timothy
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Nanson, Gerald
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Jansen, John, 19 ...
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Jones, Brian
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Jacobs, Zenobia
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Treble, Pauline
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visa fler...
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Price, David
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May, Jan-Hendric ...
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Smith, Andrew
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Ayliffe, Linda
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Hellstrom, John
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visa färre...
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Geology
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Stockholms universitet