Cosmogenic Be-10 constraints on Little Ice Age glacial advances in the eastern Tian Shan, China
文献类型：期刊论文
| 作者 | Caffee, MW (Caffee, Marc W.)2,5; Li, YA (Li, Yanan)6; Li, YK (Li, Yingkui)3; Harbor, J (Harbor, Jon)5; Liu, GN (Liu, Gengnian)4; Yi, CL (Yi, Chaolu)1; Li, YK |
| 刊名 | QUATERNARY SCIENCE REVIEWS
 |
| 出版日期 | 2016 |
| 卷号 | 138期号:0页码:105-118 |
| 关键词 | Late Quaternary Glaciation Northern-hemisphere Temperatures Production-rate Calibration Central Tien-shan Central-asia Surface Exposure Urumqi River Climate-change Atmospheric Circulation Tibetan Plateau |
| DOI | 10.1016/j.quascirev.2016.02.023 |
| 文献子类 | Article |
| 英文摘要 | Presumed Little Ice Age (LIA) glacial advances, represented by a set of fresh, sharp-crested, boulder covered and compact moraines a few hundred meters downstream from modern glaciers, have been widely recognized in the Central Asian highlands. However, few studies have constrained the formation ages of these moraines. We report 31 Be-10 exposure ages from presumed LIA moraines in six glacial valleys in the Urumqi River headwater area and the Haxilegen Pass area of the eastern Tian Shan, China. Our results reveal that the maximum LIA glacial extent occurred mainly around 430 +/- 100 yr, a cold and wet period as indicated by proxy data from ice cores, tree rings, and lake sediments in Central Asia. We also dated a later glacial advance to 270 +/- 55 yr. However, Be-10 exposure ages on several presumed LIA moraines in front of small, thin glaciers are widely scattered and much older than the globally recognized timing of the LIA. Historical topographic maps indicate that most glaciers were more extensive in the early 19605, and two of our Be-10 sample sites were located close to the ice front at that time. Boulders transported by these small and thin glaciers may be reworked from deposits originally formed prior to the LIA glacial advances, producing apparently old and widely scattered exposure ages due to varied nuclide inheritance. Other published ages indicated an earlier LIA advance around 790 +/- 300 yr in the easternmost Tian Shan, but in our study area the more extensive advance around 430 +/- 100 yr likely reworked or covered deposits from this earlier event. (C) 2016 Elsevier Ltd. All rights reserved. |
| 学科主题 | 自然地理学 |
| 语种 | 英语 |
| WOS记录号 | WOS:000374369700009 |
| 源URL | [http://ir.itpcas.ac.cn/handle/131C11/7717]  |
| 专题 | 青藏高原研究所_图书馆 |
| 通讯作者 | Li, YK |
| 作者单位 | 1.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China 2.Purdue Univ, Dept Phys & Astron, W Lafayette, IN 47907 USA 3.Univ Tennessee, Dept Geog, Knoxville, TN 37996 USA 4.Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China 5.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA 6.S Dakota State Univ, Dept Geog, Brookings, SD 57007 USA |
| 推荐引用方式 GB/T 7714 | Caffee, MW ,Li, YA ,Li, YK ,et al. Cosmogenic Be-10 constraints on Little Ice Age glacial advances in the eastern Tian Shan, China[J]. QUATERNARY SCIENCE REVIEWS,2016,138(0):105-118. |
| APA | Caffee, MW .,Li, YA .,Li, YK .,Harbor, J .,Liu, GN .,...&Li, YK.(2016).Cosmogenic Be-10 constraints on Little Ice Age glacial advances in the eastern Tian Shan, China.QUATERNARY SCIENCE REVIEWS,138(0),105-118. |
| MLA | Caffee, MW ,et al."Cosmogenic Be-10 constraints on Little Ice Age glacial advances in the eastern Tian Shan, China".QUATERNARY SCIENCE REVIEWS 138.0(2016):105-118. |
入库方式： OAI收割
来源：青藏高原研究所
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