globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.05.018
Scopus记录号: 2-s2.0-85021154209
论文题名:
Reconstructing palaeoenvironments on desert margins: New perspectives from Eurasian loess and Australian dry lake shorelines
作者: Fitzsimmons K.E.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 171
起始页码: 1
结束页码: 19
语种: 英语
英文关键词: Australia ; Data analysis ; Data treatment ; Eastern Europe ; Paleogeography ; Pleistocene ; Quaternary ; Sedimentology
Scopus关键词: Data reduction ; Geochronology ; Lakes ; Landforms ; Sedimentology ; Sediments ; Stratigraphy ; Australia ; Data treatment ; Eastern Europe ; Paleogeography ; Pleistocene ; Quaternary ; Climate change
英文摘要: Desert margins preserve evidence of more extensive arid conditions in the past and represent global hot spots with respect to climate change. The balance of scientific evidence now suggests that dryland landscape reactivation did not correspond simply to ice age aridity peaks as previously assumed. This paper provides a new perspective on, and more nuanced understanding of, desert marginal landscapes as palaeoenvironmental archives. The two case studies represent ends of a sediment availability spectrum. Both environments experience substantial spatial and temporal variability in deposition, with implications for reconstructing past environments at individual sites. Recently generated chronostratigraphic data from the dry subhumid Dobrogea loess, Romania, are synthesised to provide quantitative insights into the spatial and temporal organisation of loess plateaux. Loess accumulation peaks during the LGM and MIS4, but not at all sites. Accumulation rates vary substantially between sites. Comparison of geographical context yields no clear driving mechanism for this variability. Secondly, two transverse lunette dunes in semi-arid Willandra Lakes, Australia, yield comparable chronostratigraphies and distribution of stratigraphic units. A first attempt is made to identify changes in wind regime through time on the Australian desert margins, and suggests that high latitude climate forcing may have acted upon semi-arid Australia over millennial scales. The novel perspectives generated from the new datasets provide unprecedented insights into past climate circulation and land surface processes along desert margins. These new perspectives, coupled with the new geochronological and quantitative palaeoclimate proxy tools now available, represent the next frontier for palaeoenvironmental research on desert margins. © 2017 Elsevier Ltd
资助项目: Research in the Willandra Lakes World Heritage Area (WLRWHA) was undertaken with the permission of the Elders' Council and the Technical and Scientific Advisory Committee of the WLRWHA, and was funded by two Australian Research Council grants (DP1092966 and LP0775058). Thanks to N. Stern and members of the Archaeology Program at La Trobe University for assistance in the field at Lake Durthong, and to Steffi Hesse for sample preparation in the OSL laboratory. I thank the Paakantyi/Barkindji, Ngiyampaa and Mutthi Mutthi Elders for welcoming me into their country.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59131
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作者单位: Research Group for Terrestrial Palaeoenvironments, Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, Mainz, Germany; Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, Leipzig, Germany

Recommended Citation:
Fitzsimmons K.E.. Reconstructing palaeoenvironments on desert margins: New perspectives from Eurasian loess and Australian dry lake shorelines[J]. Quaternary Science Reviews,2017-01-01,171
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