globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2014.09.014
Scopus记录号: 2-s2.0-84908584039
论文题名:
The latest LGM culmination of the Garda Glacier (Italian Alps) and the onset of glacial termination. Age of glacial collapse and vegetation chronosequence
作者: Ravazzi C.; Pini R.; Badino F.; De Amicis M.; Londeix L.; Reimer P.J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 105
起始页码: 26
结束页码: 47
语种: 英语
英文关键词: Alpine deglaciation ; Bison priscus ; Heinrich Event 1 ; Lateglacial ; Reworked palynomorphs ; Vegetation history
Scopus关键词: Bison priscus ; Deglaciations ; Heinrich Events ; Lateglacial ; Palynomorphs ; Vegetation history ; deglaciation ; glacial deposit ; lacustrine deposit ; lake ecosystem ; Last Glacial Maximum ; piedmont ; sedimentation ; vegetation cover ; Alps ; Italy ; Bison priscus
英文摘要: In the deglacial sequence of the largest end moraine system of the Italian Alps, we focused on the latest culmination of the Last Glacial Maximum, before a sudden downwasting of the piedmontane lobe occupying the modern lake basin. We obtained a robust chronology for this culmination and for the subsequent deglacial history by cross-radiocarbon dating of a proximal fluvioglacial plain and of a deglacial continuous lake sedimentation. We used reworked dinocysts to locate sources of glacial abrasion and to mark the input of glacial meltwater until depletion. The palynological record from postglacial lake sediments provided the first vegetation chronosequence directly reacting to the early Lateglacial withdrawal so far documented in the Alps.Glacier collapse occurred soon after 17.46±0.2 ka cal BP, which is, the Manerba advance culmination. Basin deglaciation of several overdeepened foreland piedmont lakes on southern and northern sides of the Alps appears to be synchronous at millennial scale and near-synchronous with large-scale glacial retreat at global scale. The pioneering succession shows a first afforestation step at a median modeled age of 64 years after deglaciation, while rapid tree growth lagged 7 centuries. Between 16.4±0.16 and 15.5±0.16 ka cal BP, a regressive phase interrupted forest growth marking a Lateglacial phase of continental-dry climate predating GI-1. This event, spanning the most advanced phases of North-Atlantic H1, is consistently radiocarbon-framed at three deglacial lake records so far investigated on the Italian side of the Alps. Relationships with the Gschnitz stadial from the Alpine record of Lateglacial advances are discussed. © 2014.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60112
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作者单位: C.N.R. - Istituto per la Dinamica dei Processi Ambientali, Laboratory of Palynology and Palaeoecology, Piazza della Scienza 1, Milano, Italy; DISAT, University of Milano Bicocca, Piazza della Scienza 1, Milano, Italy; Département de Géologie et Océanographie, UMR CNRS 5805, Université Bordeaux 1, Avenue des Facultés, Talence cedex, France; Centre for Climate, The Environment and oChronology School of Geography, Archaeology and Palaeoecology, Queen's University of Belfast, 42 Fitzwilliam Street, Belfast, United Kingdom

Recommended Citation:
Ravazzi C.,Pini R.,Badino F.,et al. The latest LGM culmination of the Garda Glacier (Italian Alps) and the onset of glacial termination. Age of glacial collapse and vegetation chronosequence[J]. Quaternary Science Reviews,2014-01-01,105
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