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Last Deglaciation Climatic Fluctuation Record by the Palaeo-Daocheng Ice Cap,Southeastern Qinghai-Tibetan Plateau |
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| Authors: | ZHANG Zhigang XU Xiaobin WANG Jian ZHAO Zhijun BAI Shibiao CHANG ZhiYang |
| Institution: | 1. School of Geographical Sciences, Nanjing Normal University, Nanjing 210023, China;Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China 2. Jiangsu Second Normal University, Nanjing 210013, China 3. School of Geographical Sciences, Nanjing Normal University, Nanjing 210023, China;Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China;Key Laboratory of Virtual Geographical Environment, Nanjing Normal University, Nanjing 210023, China 4. Nanjing Institute of Tourism and Hospitality, Nanjing 211100, China |
| Abstract: | The last deglaciation, a key period for understanding present and future climate changes, has long been the hot topic for palaeoclimatological study. The Qinghai‐Tibetan Plateau (QTP) is often a target study area for understanding hemispheric, or even global environment changes. The glacial landforms on the QTP provide a unique perspective for its climate change. In order to investigate the onset of the last deglaciation at the QTP and its regional correlation, the terrestrial cosmogenic nuclides (TCN) 10Be and 26Al surface exposure dating was chosen to date the roche moutonnée, the polished surface and the moraine debris located at the palaeo‐Daocheng Ice Cap (p‐DIC), southeastern QTP. Our results show that the onset of the last deglaciation is at about 19 ka, followed by another warming event occurring around 15 ka in the p‐DIC area. These timings agree well with other records, e.g. equivalent with a rapid sea level rise at 19 ka and the onset of Bølling warming event at about 15 ka. Thus, our new data can provide good reveal constraint on the climate evolution at the QTP. |
| Keywords: | Terrestrial Cosmogenic Nuclides Last Deglaciation Palaeo-Daocheng Ice Cap Qinghai-Tibetan Plateau |
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