DOI: 10.1016/j.palaeo.2013.06.009
论文题名: Climatic variability during the last interglacial inferred from geochemical proxies in the Lake El'gygytgyn sediment record
作者: Cunningham L. ; Vogel H. ; Nowaczyk N. ; Wennrich V. ; Juschus O. ; Persson P. ; Rosén P.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 386 起始页码: 408
结束页码: 414
语种: 英语
英文关键词: Climate change
; Far-eastern Arctic Russia
; Glacial termination
; Last interglacial period
; Palaeolimnology
; Primary productivity
英文摘要: The Last Interglacial Period (LIP) is often regarded as a good analogue for potential climatic conditions under predicted global warming scenarios. Despite this, there is still debate over the nature, duration and frequency of climatic changes during this period. One particularly contentious issue has been the apparent evidence of climatic instability identified in many marine cores but seemingly lacking from many terrestrial archives, especially within the Arctic, a key region for global climate change research. In this paper, geochemical records from Lake El'gygytgyn, north-eastern Russia, are used to infer past climatic changes during the LIP from within the high Arctic. With a sampling resolution of ~. 20-~. 90. years, these records offer the potential for detailed, high-resolution palaeoclimate reconstruction. This study shows that the LIP commenced in central Chukotka ~. 129. thousand years ago (ka), with the warmest climatic conditions occurring between ~. 128 and 127. ka before being interrupted by a short-lived cold reversal. Mild climatic conditions then persisted until ~. 122. ka when a marked reduction in the sedimentation rate suggests a decrease in precipitation. A further climatic deterioration at ~. 118. ka marks the return to glacial conditions. This study highlights the value of incorporating several geochemical proxies when inferring past climatic conditions, thus providing the potential to identify signals related to environmental change within the catchment. We also demonstrate the importance of considering how changes in sedimentation rate influence proxy records, in order to develop robust palaeoenvironmental reconstructions. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69686
Appears in Collections: 过去全球变化的重建
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作者单位: Climate Impacts Research Centre (CIRC), Umeå University, SE-98107 Abisko, Sweden; University of Cologne, Institute of Geology and Mineralogy, Zuelpicher Str. 49a, D-50674 Cologne, Germany; University of Bern, Institute of Geological Sciences and Oeschger Centre for Climate Change Research, Baltzerstr, 1+3, CH-3012 Bern, Switzerland; GeoForschungsZentrum Potsdam, Section 3.3, Telegrafenberg, D-14473 Potsdam, Germany; Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden
Recommended Citation:
Cunningham L.,Vogel H.,Nowaczyk N.,et al. Climatic variability during the last interglacial inferred from geochemical proxies in the Lake El'gygytgyn sediment record[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,386