DOI: 10.1016/j.palaeo.2012.05.003
论文题名: Climatic and environmental changes reflected by lake-level fluctuations at Gerzensee from 14,850 to 13,050 yr BP
作者: Magny M.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 391 起始页码: 33
结束页码: 39
语种: 英语
英文关键词: Lake-level fluctuations
; Lateglacial
; Sediment analysis
; Swiss Plateau
; Water budget
英文摘要: High-resolution sediment analysis at Gerzensee, Swiss Plateau, focused on the reconstruction of lake-level changes during the last glaciation Greenland Stadial 2a (GS-2a) and a large portion of Lateglacial including the Gerzensee oscillation. The chronology is derived from a comparison of the oxygen-isotope stratigraphy established at Gerzensee with that of the NGRIP ice core. On a multi-millennial scale differences between the lake-level and oxygen-isotope records established from cores GEJ-GEK reflect a complex interplay among climate, vegetation and lake level during retreat of the ice sheet. But on a multi-centennial scale both the lake-level and oxygen-isotope records show a general agreement, i.e. cool periods such as Greenland Stadial GS-2a and Greenland Interstadials-1d and -1b, which coincided with more positive water budgets and, conversely, warm periods (Greenland Interstadials-1e and -1c) with more negative water budget. This is in agreement with the regional pattern of palaeohydrological changes reconstructed from previous studies. Despite possible reduced annual precipitation during GS-2a, the maintenance of relatively high lake-level conditions at Gerzensee at this time could have resulted from reduced evaporation and stronger runoff on bare slopes, whereas during the Lateglacial Interstadial the phases of lake-level lowering may have been associated with summer dryness linked to increasing summer insolation. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69579
Appears in Collections: 过去全球变化的重建
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作者单位: CNRS-UMR 6249, Laboratoire de Chrono-Environnement, Faculté des Sciences et Techniques, 16 route de Gray, 25 030 Besançon, France
Recommended Citation:
Magny M.. Climatic and environmental changes reflected by lake-level fluctuations at Gerzensee from 14,850 to 13,050 yr BP[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,391