Late Pleistocene and Early Holocene aeolian deposits of Tasmania and their climatic implications
Late Pleistocene and Early Holocene aeolian deposits of Tasmania and their climatic implications
复制标题
塔斯马尼亚晚更新世和早全新世风积物及其气候影响
DOI:
10.1017/qua.2020.83
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发表时间:
2021
影响因子:
2.3
通讯作者:
Dixon, Grant
中科院分区:
文献类型:
--
作者:
McIntosh, Peter D.;Neudorf, Christina;Lian, Olav B.;Slee, Adrian J.;Walker, Brianna;Eberhard, Rolan;Doyle, Richard;Dixon, Grant
Late Pleistocene and Early Holocene aeolian deposits in Tasmania are extensive in the present subhumid climate zone but also occur in areas receiving >1000 mm of rain annually. Thermoluminescence, optically stimulated luminescence, and radiocarbon ages indicate that most of the deposits formed during periods of cold climate. Some dunes are remnants of longitudinal desert dunes sourced from now-inundated continental shelves which were previously semi-arid. Others formed near source, often in the form of lunettes east of seasonally-dry lagoons in the previously semi-arid Midlands and southeast of Tasmania, or as accumulations close to floodplains of major rivers, or as sandsheets in exposed areas. Burning of vegetation by the Aboriginal population after 40 ka is likely to have influenced sediment supply. A key site for determining climate variability in southern Tasmania is Maynes Junction which records three periods of aeolian deposition (at ca. 90, 32 and 20 ka), interspersed with periods of hillslope instability. Whether wind speeds were higher than at present during the last glacial period is uncertain, but shells in the Mary Ann Bay sandsheet near Hobart and particle size analysis of the Ainslie dunes in northeast Tasmania suggest stronger winds during the last glacial period than at present.
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DOI:
--
发表时间:
1985
期刊:
影响因子:
--
作者:
R. Cosgrove
通讯作者:
R. Cosgrove
影响因子:
2.3
作者:
E. Colhoun
通讯作者:
E. Colhoun
DOI:
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发表时间:
1972
期刊:
影响因子:
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作者:
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通讯作者:
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DOI:
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2002
期刊:
影响因子:
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作者:
E. Colhoun
通讯作者:
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DOI:
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发表时间:
2015
期刊:
Geoscience journal
影响因子:
--
作者:
P. McIntosh
通讯作者:
P. McIntosh