DOI: 10.1016/j.quascirev.2014.05.008
Scopus记录号: 2-s2.0-84902120086
论文题名: Topographic and microclimatic impacts on glaciation of the Denison Range, southwest Tasmania
作者: Kiernan K. ; McMinn M.S. ; Fink D.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 97 起始页码: 136
结束页码: 147
语种: 英语
英文关键词: Cirques
; Cosmogenic exposure dating
; Glaciation
; Last Glacial Maximum
; Moraines
; Topographic influences
Scopus关键词: Geology
; Natural sciences
; Cirques
; Cosmogenic exposure
; Glaciation
; Last Glacial Maximum
; Moraines
; Topographic influences
; Glacial geology
; aridity
; climate effect
; correlation
; glaciation
; Last Glacial Maximum
; microclimate
; paleoclimate
; Australia
; Tasmania
英文摘要: Morphostratigraphic relationships between landforms and sediments, comparative boulder weathering status, and paired 10Be and 26Al exposure ages indicate the occurrence of at least three separate glaciations that are interpreted as dating from MIS 2, 6 and possibly 8. The Rhona Glacier remained at or close to its greatest LGM extent until ~17.6ka due to a very favourable micro-climate that resulted from local topography. That these factors were sufficient to over-power relatively subtle zonal temperature shifts that caused significant changes in more exposed Tasmanian glaciers implies a need for caution in correlating between glacier systems in markedly different topographic settings when environmental conditions are only marginally supportive of glaciation. No evidence was detected for any greater ice extent during MIS 3 or MIS 4 than during MIS 2, but much more extensive glaciations occurred during earlier glacial climatic cycles. Reduced local precipitation in parallel with increasing aridity of the Australian continent may account for the progressively diminishing maximum extent of glaciers during the latter part of the Pleistocene, and it would have emphasized the importance of local topography and microclimate for the glaciers of southwest Tasmania. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60216
Appears in Collections: 过去全球变化的重建
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作者单位: School of Geography and Environmental Studies, University of Tasmania, Hobart, TAS 7001, Australia; Institute for Environmental Research, Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australia
Recommended Citation:
Kiernan K.,McMinn M.S.,Fink D.. Topographic and microclimatic impacts on glaciation of the Denison Range, southwest Tasmania[J]. Quaternary Science Reviews,2014-01-01,97