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Cosmogenic Be-10 constraints on Little Ice Age glacial advances in the eastern Tian Shan, China
Li, YA (Li, Yanan)1; Li, YK (Li, Yingkui)2; Harbor, J (Harbor, Jon)3; Liu, GN (Liu, Gengnian)4; Yi, CL (Yi, Chaolu)5; Caffee, MW (Caffee, Marc W.)3,6; Li, YK
Source PublicationQUATERNARY SCIENCE REVIEWS
2016
Volume138Issue:0Pages:105-118
DOI10.1016/j.quascirev.2016.02.023
AbstractPresumed 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.
Subject Area自然地理学
WOS IDWOS:000374369700009
Language英语
Indexed BySCI
KeywordLate Quaternary Glaciation Northern-hemisphere Temperatures Production-rate Calibration Central Tien-shan Central-asia Surface Exposure Urumqi River Climate-change Atmospheric Circulation Tibetan Plateau
Cooperation Status国际
Department环境
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/7717
Collection图书馆
Corresponding AuthorLi, YK
Affiliation1.S Dakota State Univ, Dept Geog, Brookings, SD 57007 USA
2.Univ Tennessee, Dept Geog, Knoxville, TN 37996 USA
3.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA
4.Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China
5.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China
6.Purdue Univ, Dept Phys & Astron, W Lafayette, IN 47907 USA
Recommended Citation
GB/T 7714
Li, YA ,Li, YK ,Harbor, J ,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 Li, YA .,Li, YK .,Harbor, J .,Liu, GN .,Yi, CL .,...&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 Li, YA ,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.
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