气候变化领域集成服务门户(CCPortal): Increased autumn and winter precipitation during the Last Glacial Maximum in the European Alps

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DOI	10.1038/s41467-021-22090-7
	Increased autumn and winter precipitation during the Last Glacial Maximum in the European Alps
	Spötl C.; Koltai G.; Jarosch A.H.; Cheng H.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	The culmination of the glaciers in the European Alps during the Last Glacial Maximum (LGM) is one of the most intensively studied paleoglaciological events, but its trigger and forcing remain incompletely understood. Here, we provide evidence that the timing of this glacier maximum coincided within age uncertainties with a 3100 yr-long interval of subsurface warming (26.6 to 23.5 ka BP) as recorded by an archive preserved in caves, cryogenic carbonates. This interval of sustained permafrost degradation during one of the coldest intervals of the last glacial period calls for a fundamental change in the dry Arctic-style precipitation regime. Instead, heavy snowfall during autumn and early winter led to the accumulation of a seasonal snowpack insulating the ground from the winter chill. Combined with thermal modelling, the data provide compelling evidence that the LGM glacier advance in the Alps was fueled by intensive snowfall late in the year, likely sourced from the Mediterranean Sea. © 2021, The Author(s).
语种	英语
scopus关键词	age structure; freezing; glacier advance; Last Glacial Maximum; paleolimnology; permafrost; precipitation assessment; snowpack; Alps; Arctic; Mediterranean Sea
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250735
作者单位	Institute of Geology, University of Innsbruck, Innsbruck, Austria; ThetaFrame Solutions, Kufstein, Austria; Institute of Global Environmental Change, Xi’an Jiaotong University, Xi’an, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China; Department of Earth Sciences, University of Minnesota, Minneapolis, MN, United States
推荐引用方式 GB/T 7714	Spötl C.,Koltai G.,Jarosch A.H.,et al. Increased autumn and winter precipitation during the Last Glacial Maximum in the European Alps[J],2021,12(1).
APA	Spötl C.,Koltai G.,Jarosch A.H.,&Cheng H..(2021).Increased autumn and winter precipitation during the Last Glacial Maximum in the European Alps.Nature Communications,12(1).
MLA	Spötl C.,et al."Increased autumn and winter precipitation during the Last Glacial Maximum in the European Alps".Nature Communications 12.1(2021).