气候变化领域集成服务门户(CCPortal): Extensive mountain glaciation in central Patagonia during Marine Isotope Stage 5

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DOI	10.1016/j.quascirev.2019.105996
	Extensive mountain glaciation in central Patagonia during Marine Isotope Stage 5
	Mendelová M.; Hein A.S.; Rodés Á.; Xu S.
发表日期	2020
ISSN	0277-3791
卷号	227
英文摘要	The timing and magnitude of glacial advances throughout a glacial cycle can give insight on the underlying drivers of climate change. Our knowledge of glacial activity early in a glacial cycle, however, is limited by incomplete preservation of the geomorphological record. Here, we present a B10e-dated glacial chronology from early in the last glacial cycle from the Belgrano valley, east of Monte San Lorenzo in central Patagonia. Our chronology reveals the most extensive glacial advance of the last glacial cycle occurred at ∼ 75 ka, at the end of Marine Isotope Stage 5. A second, less-extensive advance occurred at ∼ 25 ka during the global Last Glacial Maximum. The topographic setting is such that ice growth would have initiated on and around the San Lorenzo massif at the start of the glacial cycle. We suggest reduced southern hemisphere summer insolation at the time played a significant role in driving this early advance. The comparatively smaller glacier extent during the global Last Glacial Maximum is likely a consequence of the build-up of the full Patagonian Ice Sheet, which would have caused ice-divide migration, ice-flow re-routing, and increased aridity on its lee side. © 2019 Elsevier Ltd
英文关键词	Cosmogenic nuclide exposure dating; Glacial chronology; Ice-divide migration; Last glacial cycle; South America
语种	英语
scopus关键词	Climate change; Ice; Isotopes; Central Patagonia; Cosmogenic nuclides; Glacial chronology; Last glacial cycles; Last Glacial Maximum; Marine isotope stages; South America; Southern Hemisphere; Glacial geology; climate change; cosmogenic radionuclide; dating method; geomorphology; glaciation; glacier advance; ice sheet; Last Glacial Maximum; marine isotope stage; mountain region; Monte San Lorenzo; Patagonia
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151665
作者单位	University of Edinburgh, School of Geosciences, Drummond Street, Edinburgh, Scotland EH8 9XP, United Kingdom; Scottish Universities Environmental Research Centre, Scottish Enterprise Technology Park, East Kilbride, Glasgow, Scotland G75 OQF, United Kingdom
推荐引用方式 GB/T 7714	Mendelová M.,Hein A.S.,Rodés Á.,et al. Extensive mountain glaciation in central Patagonia during Marine Isotope Stage 5[J],2020,227.
APA	Mendelová M.,Hein A.S.,Rodés Á.,&Xu S..(2020).Extensive mountain glaciation in central Patagonia during Marine Isotope Stage 5.Quaternary Science Reviews,227.
MLA	Mendelová M.,et al."Extensive mountain glaciation in central Patagonia during Marine Isotope Stage 5".Quaternary Science Reviews 227(2020).