globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2012.11.001
论文题名:
Vegetation and climate changes during the last 22,000yr from a marine core near Taitao Peninsula, southern Chile
作者: Montade V.; Combourieu Nebout N.; Kissel C.; Haberle S.G.; Siani G.; Michel E.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 369
起始页码: 335
结束页码: 348
语种: 英语
英文关键词: Antarctic Cold Reversal ; Holocene ; Last deglaciation ; Marine palynology ; Palaeoenvironment ; Patagonia ; Southern hemisphere ; Southern Westerly Wind belt ; Vegetation
英文摘要: High-temporal resolution of pollen analyses from marine core MD07-3088 (46°S) documents regional and coastal vegetation changes in the mid-latitude of southern Chile during the last 22kyr BP. The coastal margin was partly ice-free during the last glacial period with the presence of scattered vegetation. After~17.6kyr BP, the expansion of Nothofagus woodland highlights a warming trend and marks the beginning of the last deglaciation. The deglacial forest expansion is interrupted by the development of Magellanic moorland simultaneously with the Antarctic Cold Reversal. This vegetation change illustrates a pause in the warming trend with an abrupt increase in precipitation which is related to strong intensity of Southern Westerly Winds. After 12.8kyr BP, the retreat of Magellanic moorland illustrates a second-step warming that is strengthened after 11.5kyr at the onset of the Holocene. Expansion of heliophytic taxa illustrates warmest and driest conditions of the Holocene from 11 to 7.4kyr BP. Later, the decrease of heliophytic taxa shows a return to cooler and wetter conditions, illustrated by the presence of the North Patagonian rainforest that reaches modern condition after 5kyr. Climate changes inferred from the marine pollen record are consistent with geochemical data changes from the same samples and illustrate a clear synchronicity with δD variations of EPICA Dome C ice core during the last deglaciation and Holocene. Comparison between vegetation changes from the marine core and regional palaeoclimatic records highlights southward-northward shifts of the Southern Westerly Wind belt and supports a close link between Southern Westerly Wind belt and atmospheric CO2 variability during the last deglaciation. © 2012 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69890
Appears in Collections:过去全球变化的重建

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作者单位: Laboratoire des Sciences du Climat et de l'Environnement (LSCE), UMR 8212 CNRS/UVSQ/CEA, Orme des Merisiers, Bâtiment 701, 91191 Gif-sur-Yvette Cedex, France; Laboratoire des Sciences du Climat et de l'Environnement (LSCE), UMR 8212 CNRS/UVSQ/CEA, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France; Department of Archaeology and Natural History, College of Asia and the Pacific, Australian National University, Canberra, Australian Capital Territory 0200, Australia; Laboratoire des Interactions et Dynamique des Environnements de Surface (IDES), UMR 8148, CNRS, Bâtiment 504, 91405 Orsay Cedex, France

Recommended Citation:
Montade V.,Combourieu Nebout N.,Kissel C.,et al. Vegetation and climate changes during the last 22,000yr from a marine core near Taitao Peninsula, southern Chile[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,369
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