Arid
DOI10.1016/j.epsl.2013.08.041
Late Pleistocene glacial advances in the western Tibet interior
Amidon, William H.1; Bookhagen, Bodo2; Avouac, Jean-Philippe3; Smith, Taylor2; Rood, Dylan4
通讯作者Amidon, William H.
来源期刊EARTH AND PLANETARY SCIENCE LETTERS
ISSN0012-821X
EISSN1385-013X
出版年2013
卷号381页码:210-221
英文摘要

It has long been observed that the timing of glacial advances is asynchronous across the Himalaya-Karakoram-Tibet Plateau (HICTP) but the climatic implications, if any, remain unclear. Resolving this question requires additional glacial chronologies from unique spatial and climatic regimes as well as an analysis of how glaciers within different regimes are likely to have responded to past climate changes. This study presents a Be-10-Ne-21 chronology from the Mawang Kangri range of western Tibet (similar to 34 degrees N, 80 degrees E); an arid high-elevation site. We identify advances at similar to 123, 83, and 56 kyr, which agree reasonably well with sites in the immediate vicinity, but are asynchronous relative to sites across the entire HKTP, and relative to sites in the western HKTP. To evaluate HKTP-wide asynchroneity, we compile dated glacial chronologies and classify them by the approximate timing of their maximum recent advance. This result shows a strong spatial clustering of young (MIS 1-2) relative to older (MIS 3-5) maximum advances. Further comparison with modern precipitation, temperature, and topographic data show that the pattern of HKTP-wide asynchroneity is broadly independent of topography and can potentially be explained by local responses to changes in temperature at either very warm-wet or cold-dry sites. Sites that receive intermediate amounts of precipitation are more ambiguous, although spatial clustering of MIS 1-2 vs. MIS 3-5 advances is suggestive of past variations in precipitation at these sites. In western Tibet, no spatial or climatic correlation is observed with the timing of maximum glacial advances. We suggest this could arise from mis-interpretation of disparate boulder ages generated by a prolonged MIS-3/4 glacial advance in the western HKTP. (C) 2013 Elsevier B.V. All rights reserved.


英文关键词cosmogenic Be-10 Ne-21 Tibet climate glacier
类型Article
语种英语
国家USA ; Scotland
收录类别SCI-E
WOS记录号WOS:000327367800020
WOS关键词LATE QUATERNARY GLACIATION ; SURFACE EXPOSURE AGES ; INDIAN-SUMMER MONSOON ; COSMOGENIC BE-10 ; LANDSCAPE EVOLUTION ; CLIMATE VARIABILITY ; WINTER TEMPERATURE ; EROSION RATES ; MOUNT EVEREST ; CENTRAL-ASIA
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/176623
作者单位1.Middlebury Coll, Dept Geol, Middlebury, VT 05753 USA;
2.Univ Calif Santa Barbara, Dept Geog, Santa Barbara, CA 93106 USA;
3.CALTECH, Dept Geol & Planetary Sci, Pasadena, CA 91125 USA;
4.Scottish Univ Environm Res Ctr, Glasgow G12 8QQ, Lanark, Scotland
推荐引用方式
GB/T 7714
Amidon, William H.,Bookhagen, Bodo,Avouac, Jean-Philippe,et al. Late Pleistocene glacial advances in the western Tibet interior[J],2013,381:210-221.
APA Amidon, William H.,Bookhagen, Bodo,Avouac, Jean-Philippe,Smith, Taylor,&Rood, Dylan.(2013).Late Pleistocene glacial advances in the western Tibet interior.EARTH AND PLANETARY SCIENCE LETTERS,381,210-221.
MLA Amidon, William H.,et al."Late Pleistocene glacial advances in the western Tibet interior".EARTH AND PLANETARY SCIENCE LETTERS 381(2013):210-221.
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