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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, Guocheng1,2; Xu, Xiangke3,4; Zhou, Weijian1,2,5; Fu, Yunchong1,2; Zhang, Li1,2; Li, Ming1,2
2017-07-01
发表期刊JOURNAL OF QUATERNARY SCIENCE
卷号32期号:5页码:639-652
文章类型Article
摘要The 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.
关键词Be-10 Surface Exposure Dating Equilibrium Line Altitude Glacier Reconstruction Last Glacial Maximum Nyainqentanglha
WOS标题词Science & Technology ; Physical Sciences
DOI10.1002/jqs.2963
关键词[WOS]EQUILIBRIUM-LINE ALTITUDES ; LATE QUATERNARY GLACIATION ; NUCLIDE PRODUCTION-RATES ; IBERIAN CENTRAL SYSTEM ; ICE-AGE ; TASHKURGAN VALLEY ; MASS-BALANCE ; NEW-ZEALAND ; PLATEAU ; CLIMATE
收录类别SCI
语种英语
WOS研究方向Physical Geography ; Geology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号WOS:000405801900008
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5434
专题加速器质谱中心
作者单位1.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
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GB/T 7714
Dong, Guocheng,Xu, Xiangke,Zhou, Weijian,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, Guocheng,Xu, Xiangke,Zhou, Weijian,Fu, Yunchong,Zhang, Li,&Li, Ming.(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, Guocheng,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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