The distribution and climatic implications of periglacial landforms in eastern Australia

Slee, Adrian and Shulmeister, James (2015) The distribution and climatic implications of periglacial landforms in eastern Australia. Journal of Quaternary Science, 30 8: 848-858. doi:10.1002/jqs.2823


Author Slee, Adrian
Shulmeister, James
Title The distribution and climatic implications of periglacial landforms in eastern Australia
Journal name Journal of Quaternary Science   Check publisher's open access policy
ISSN 1099-1417
0267-8179
Publication date 2015-12-14
Sub-type Article (original research)
DOI 10.1002/jqs.2823
Open Access Status Not Open Access
Volume 30
Issue 8
Start page 848
End page 858
Total pages 11
Place of publication Chichester, West Sussex, United Kingdom
Publisher John Wiley & Sons
Collection year 2016
Language eng
Formatted abstract
Mapping of over 4000 block deposits and scree slopes in eastern Australia is used to determine the extent of past strong freeze-thaw activity. Freeze-thaw landforms are common in the high country as far north as 30°S. There is a clear association between the locations of relict periglacial landforms and areas that receive more than 50 modern frost days. We infer about 10.5°C cooling north of 35°S in the Diving Range, about 9°C in the Australian Alps and about 5°C in Tasmania during the phases when the lowest block deposits were active. An unexpected observation is the importance of precipitation in the distribution of block deposits north of 35°S. Here, the majority of block deposits have a southerly or westerly aspect, and lie in a narrow modern precipitation band of ca. 900-1050mm. To the east, high-elevation areas appear to have weaker diurnal oscillations limiting freeze-thaw activity. To the west, block deposits are absent, probably due to insufficient moisture to drive freeze-thaw processes. We cannot define specific last glaciation precipitation but the maintenance of a strong east-west precipitation gradient during glacial times is consistent with the maintenance of onshore easterlies during cold periods.
Keyword Periglacial
LGM
Australia
Block deposits
Paleoclimate reconstruction
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Geography, Planning and Environmental Management Publications
Official 2016 Collection
 
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Created: Wed, 24 Feb 2016, 11:42:52 EST by Professor James Shulmeister on behalf of School of Geography, Planning & Env Management