globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2018.03.007
Scopus记录号: 2-s2.0-85043603038
论文题名:
The timing and cause of glacial activity during the last glacial in central Tibet based on 10Be surface exposure dating east of Mount Jaggang, the Xainza range
作者: Dong G.; Zhou W.; Yi C.; Fu Y.; Zhang L.; Li M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 186
起始页码: 284
结束页码: 297
语种: 英语
英文关键词: 10Be surface exposure dating ; Central Tibet ; Heinrich events ; Mount Jaggang ; The last glacial
Scopus关键词: Atmospheric thermodynamics ; Climate change ; Timing circuits ; Central Tibet ; Heinrich Events ; Last glacial ; Mount Jaggang ; Surface exposure dating ; Glacial geology ; climate change ; dating method ; Heinrich event ; Last Glacial ; Last Glacial Maximum ; marine isotope stage ; transition zone ; Asia ; Atlantic Ocean ; Atlantic Ocean (North) ; China ; Qinghai-Xizang Plateau ; Xizang
英文摘要: Mountain glaciers are sensitive to climate change, and can provide valuable information for inferring former climates on the Tibetan Plateau (TP). The increasing glacial chronologies indicate that the timing of the local Last Glacial Maximum (LGM) recorded across the TP is asynchronous, implying different local influences of the mid-latitude westerlies and Asian Summer Monsoon in triggering glacier advances. However, the well-dated sites are still too few, especially in the transition zone between regions controlled by the two climate systems. Here we present detailed last glacial chronologies for the Mount Jaggang area, in the Xainza range, central Tibet, with forty-three apparent 10Be exposure-ages ranging from 12.4 ± 0.8 ka to 61.9 ± 3.8 ka. These exposure-ages indicate that at least seven glacial episodes occurred during the last glacial cycle east of Mount Jaggang. These include: a local LGM that occurred at ∼61.9 ± 3.8 ka, possibly corresponding to Marine Isotope Stage 4 (MIS 4); subsequent glacial advances at ∼43.2 ± 2.6 ka and ∼35.1 ± 2.1 ka during MIS 3; one glacial re-advance/standstill at MIS3/2 transition (∼29.8 ± 1.8 ka); and three glacial re-advances/standstills that occurred following MIS 3 at ∼27.9 ± 1.7 ka, ∼21.8 ± 1.3 ka, and ∼15.1 ± 0.9 ka. The timing of these glacial activities is roughly in agreement with North Atlantic millennial-scale climate oscillations (Heinrich events), suggesting the potential correlations between these abrupt climate changes and glacial fluctuations in the Mount Jaggang area. The successively reduced glacial extent might have resulted from an overall decrease in Asian Summer Monsoon intensity over this timeframe. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112236
Appears in Collections:气候减缓与适应

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作者单位: State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Xi'an AMS Center, Xi'an, 710061, China; Beijing Normal University, Beijing, 100875, China; Key Laboratory of Tibetan Environment Changes and Land Surface Process, Chinese Academy of Sciences, Beijing, 100101, China; Excellence Center for Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China

Recommended Citation:
Dong G.,Zhou W.,Yi C.,et al. The timing and cause of glacial activity during the last glacial in central Tibet based on 10Be surface exposure dating east of Mount Jaggang, the Xainza range[J]. Quaternary Science Reviews,2018-01-01,186
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