中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Cosmogenic Be-10 surface exposure dating and glacier reconstruction for the Last Glacial Maximum in the Quemuqu Valley, western Nyainqentanglha Mountains, south Tibet

文献类型:期刊论文

作者Zhou, Weijian1,2,4; Zhang, Li1,2; Li, Ming1,2; Dong, Guocheng1,2; Xu, Xiangke3,5; Fu, Yunchong1,2
刊名JOURNAL OF QUATERNARY SCIENCE
出版日期2017-07-01
卷号32期号:5页码:639-652
关键词Be-10 Surface Exposure Dating Equilibrium Line Altitude Glacier Reconstruction Last Glacial Maximum Nyainqentanglha
DOI10.1002/jqs.2963
文献子类Article
英文摘要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.
WOS关键词EQUILIBRIUM-LINE ALTITUDES ; LATE QUATERNARY GLACIATION ; NUCLIDE PRODUCTION-RATES ; IBERIAN CENTRAL SYSTEM ; ICE-AGE ; TASHKURGAN VALLEY ; MASS-BALANCE ; NEW-ZEALAND ; PLATEAU ; CLIMATE
WOS研究方向Physical Geography ; Geology
语种英语
WOS记录号WOS:000405801900008
源URL[http://ir.ieecas.cn/handle/361006/5434]  
专题地球环境研究所_加速器质谱中心
作者单位1.Xian AMS Ctr, Xian, Peoples R China
2.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian, Peoples R China
3.Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China
4.Beijing Normal Univ, Beijing, Peoples R China
5.Chinese Acad Sci, Excellence Ctr Tibetan Plateau Res, Beijing, Peoples R China
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Zhou, Weijian,Zhang, Li,Li, Ming,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 Zhou, Weijian,Zhang, Li,Li, Ming,Dong, Guocheng,Xu, Xiangke,&Fu, Yunchong.(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 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".JOURNAL OF QUATERNARY SCIENCE 32.5(2017):639-652.

入库方式: OAI收割

来源:地球环境研究所

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