气候变化领域集成服务门户(CCPortal): High-frequency Holocene glacier fluctuations in the Himalayan-Tibetan orogen

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DOI	10.1016/j.quascirev.2019.07.021
	High-frequency Holocene glacier fluctuations in the Himalayan-Tibetan orogen
	Saha S.; Owen L.A.; Orr E.N.; Caffee M.W.
发表日期	2019
ISSN	0277-3791
起始页码	372
结束页码	400
卷号	220
英文摘要	Holocene glacial chronostratigraphies in glaciated valleys spread throughout the Himalayan-Tibetan orogen, including the Himalaya, Tibet, Pamir, and Tian Shan, are developed using a landsystems approach, detailed geomorphic mapping, and new and published 10Be surface exposure dating. New studies in the Kulti valley of Lahul and the Parkachik valley of the Nun Kun massif of the Himalaya of northern India define three glacier advances at ∼14.7, 12.2, 0.5 ka, in addition to one historically dated late 19th Century advance in the Kulti valley, and one Late Holocene advance at ∼0.2 ka in the Parkachik valley. Three major climatic groups (subdivided into five climatic zones) are defined across the orogen using Cluster Analysis (CA) and Principal Component Analysis (PCA) to identify glaciated regions with comparable climatic characteristics to evaluate the timing, and extent of Holocene glacier advances across these regions. Our regional analyses across the Himalayan-Tibetan orogen suggest at least one Lateglacial (∼15.3–11.8 ka) and five Himalayan-Tibetan Holocene glacial stages (HTHS) at ∼11.5–9.5, ∼8.8–7.7, ∼7.0–3.2, ∼2.3–1.0, and <1 ka. The extent (amplitude) of glacier advances in 77 glaciated valleys is reconstructed and defined using equilibrium-line altitudes (ELAs). Modern glacier hypsometries are also assessed to help explain the intra-regional variations in glacier amplitudes during each regional glacier advance. A linear inverse glacier flow model is used to decipher the net changes in temperature (ΔT) between periods of reconstructed regional glacier advances in 66 glaciated valleys across different climatic regions throughout the orogen. The 10Be, ELAs, and ΔT data suggest enhanced monsoonal and increased precipitation during the Early Holocene, followed by relative cooling and increased aridity during the Mid- and Late Holocene that influenced glaciation. The sublimation-dominated cold-based glaciers in the northern regions of Himalayan-Tibetan orogen are more affected during these shifts in climate than the temperate glaciers in the south. © 2019 Elsevier Ltd
英文关键词	Central Asia; Cosmogenic isotopes; Equilibrium-line altitudes; Glaciation; Holocene; Paleoclimate modeling
语种	英语
scopus关键词	Cluster analysis; Glacial geology; Inverse problems; Landforms; Regional planning; Central Asia; Cosmogenic isotopes; Equilibrium line altitudes; Glaciation; Holocenes; Paleoclimates; Principal component analysis; chronostratigraphy; climatic region; glaciation; glacier advance; glacier flow; Holocene; precipitation (climatology); China; Himalayas; India; Pamirs; Tien Shan; Xizang
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/151793
作者单位	Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, CA 90095, United States; Department of Physics, Geology, and Engineering Technology, Northern Kentucky UniversityKY 41099, United States; Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, United States; German Research Centre for Geosciences (GFZ), University of Potsdam, Institute for Geosciences, Potsdam, 14476, Germany; Department of Physics, Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette, IN 47907, United States
推荐引用方式 GB/T 7714	Saha S.,Owen L.A.,Orr E.N.,et al. High-frequency Holocene glacier fluctuations in the Himalayan-Tibetan orogen[J],2019,220.
APA	Saha S.,Owen L.A.,Orr E.N.,&Caffee M.W..(2019).High-frequency Holocene glacier fluctuations in the Himalayan-Tibetan orogen.Quaternary Science Reviews,220.
MLA	Saha S.,et al."High-frequency Holocene glacier fluctuations in the Himalayan-Tibetan orogen".Quaternary Science Reviews 220(2019).