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Cosmogenic Be-10 surface exposure dating and glacier reconstruction for the Last Glacial Maximum in the Quemuqu Valley, western Nyainqentanglha Mountains, south Tibet
Dong, GC (Dong, Guocheng)1,2; Xu, XK (Xu, Xiangke)3,4; Zhou, WJ (Zhou, Weijian)1,2,5; Fu, YC (Fu, Yunchong)1,2; Zhang, L (Zhang, Li)1,2; Li, M (Li, Ming)1,2; Dong, GC
Source PublicationJOURNAL OF QUATERNARY SCIENCE
2017
Volume32Issue:5Pages:639-652
DOI10.1002/jqs.2963
AbstractThe nature and timing of glaciations enable inferences to be made about glacial climates. However, the paucity of reliable glacial chronologies impedes a full understanding of the Last Glacial Maximum (LGM) climate in the western Nyainqentanglha Mountains, south Tibet. In this study, we investigated the LGM glacial history in the Quemuqu Valley, western Nyainqentanglha, using Be-10 surface exposure dating. We used a physically based glacier model to reconstruct the LGM glacial surfaces, and estimated the LGM equilibrium-line-altitude (ELA) using integrated methods. Combined with previously published Be-10 exposure ages from the western Nyainqentanglha, ten Be-10 exposure ages imply a relatively restricted glacial extent in the LGM but extensive growth in the early last glacial. The modeled LGM glaciers had ice areas of approximate to 36.3km(2), 3.21km(3) in volume and 89mm in average thickness in the Quemuqu Valley. The reconstructed LGM ELAs have values of 5463-5583masl, with a depression of approximate to 244-364m. By combining the reconstructed ELAs with an equation deduced from glacier mass balance, we concluded that the temperature dropped by approximate to 2.6-4.6 degrees C in the LGM relative to the present, with 30-70% lower precipitation than the present. Global cooling induced the LGM glacial advance in the western Nyainqentanglha despite decreased precipitation.
Subject Area自然地理学
WOS IDWOS:000405801900008
Language英语
Indexed BySCI
KeywordEquilibrium-line Altitudes Late Quaternary Glaciation Nuclide Production-rates Iberian Central System Ice-age Tashkurgan Valley Mass-balance New-zealand Plateau Climate
WOS Research AreaPhysical Geography; Geology
WOS SubjectGeography, Physical; Geosciences, Multidisciplinary ; Physical Geography; Geology
Cooperation Status国内
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8044
Collection图书馆
Corresponding AuthorDong, GC
Affiliation1.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian, Peoples R China.
2.Xian AMS Ctr, Xian, Peoples R China.
3.Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China.
4.Chinese Acad Sci, Excellence Ctr Tibetan Plateau Res, Beijing, Peoples R China.
5.Beijing Normal Univ, Beijing, Peoples R China.
Recommended Citation
GB/T 7714
Dong, GC ,Xu, XK ,Zhou, WJ ,et al. Cosmogenic Be-10 surface exposure dating and glacier reconstruction for the Last Glacial Maximum in the Quemuqu Valley, western Nyainqentanglha Mountains, south Tibet[J]. JOURNAL OF QUATERNARY SCIENCE,2017,32(5):639-652.
APA Dong, GC .,Xu, XK .,Zhou, WJ .,Fu, YC .,Zhang, L .,...&Dong, GC.(2017).Cosmogenic Be-10 surface exposure dating and glacier reconstruction for the Last Glacial Maximum in the Quemuqu Valley, western Nyainqentanglha Mountains, south Tibet.JOURNAL OF QUATERNARY SCIENCE,32(5),639-652.
MLA Dong, GC ,et al."Cosmogenic Be-10 surface exposure dating and glacier reconstruction for the Last Glacial Maximum in the Quemuqu Valley, western Nyainqentanglha Mountains, south Tibet".JOURNAL OF QUATERNARY SCIENCE 32.5(2017):639-652.
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