DOI: 10.1016/j.palaeo.2012.05.017
论文题名: High-resolution late-glacial chronology for the Gerzensee lake record (Switzerland): δ18O correlation between a Gerzensee-stack and NGRIP
作者: Van Raden U.J. ; Colombaroli D. ; Gilli A. ; Schwander J. ; Bernasconi S.M. ; van Leeuwen J. ; Leuenberger M. ; Eicher U.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 391 起始页码: 13
结束页码: 24
语种: 英语
英文关键词: Authigenic calcite
; Bølling/Allerød
; Climate oscillations
; Monte Carlo simulation
; Stable isotopes
英文摘要: Oxygen-isotope variations were analyzed on bulk samples of shallow-water lake marl from Gerzensee, Switzerland, in order to evaluate major and minor climatic oscillations during the late-glacial. To highlight the overall signature of the Gerzensee δ18O record, δ18O records of four parallel sediment cores were first correlated by synchronizing major isotope shifts and pollen abundances. Then the records were stacked with a weighting depending on the differing sampling resolution. To develop a precise chronology, the δ18O-stack was then correlated with the NGRIP δ18O record applying a Monte Carlo simulation, relying on the assumption that the shifts in δ18O were climate-driven and synchronous in both archives. The established chronology on the GICC05 time scale is the basis for (1) comparing the δ18O changes recorded in Gerzensee with observed climatic and environmental fluctuations over the whole North Atlantic region, and (2) comparing sedimentological and biological changes during the rapid warming with smaller climatic variations during the Bølling/Allerød period. The δ18O record of Gerzensee is characterized by two major isotope shifts at the onset and at the termination of the Bølling/Allerød warm period, as well as four intervening negative shifts labeled GI-1e2, d, c2, and b, which show a shift of one third to one fourth of the major δ18O shifts at the beginning and end of the Bølling/Allerød. Despite some inconsistency in terminology, these oscillations can be observed in various climatic proxies over wide regions in the North Atlantic region, especially in reconstructed colder temperatures, and they seem to be caused by hemispheric climatic variations. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69578
Appears in Collections: 过去全球变化的重建
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作者单位: Geological Institute, ETH Zurich, Sonneggstrasse 5, 8092 Zürich, Switzerland; Oeschger Centre for Climate Change Research, Institute of Plant Sciences, University of Bern, Altenbergrain 21, 3013 Bern, Switzerland; Physics Institute, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland; Institute of Plant Sciences, University of Bern, Altenbergrain 21, 3013 Bern, Switzerland
Recommended Citation:
Van Raden U.J.,Colombaroli D.,Gilli A.,et al. High-resolution late-glacial chronology for the Gerzensee lake record (Switzerland): δ18O correlation between a Gerzensee-stack and NGRIP[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,391