| 摘要: |
| 南疆博斯腾湖湖相沉积物碳酸盐稳定同位素、孢粉及地化元素含量的波动揭示了于11.0-10.0kaBP期间的相对冷湿的环境特征, 这次变冷事件在年代上可与末次冰消期的新仙女木气候突然变冷事件相对应, 虽然目前还无法圆满解释此事件的成因机制, 但此事件在极端干旱的南疆博斯腾湖湖相沉积中的发现, 无疑对深入认识此事件发生的全球性以及探讨其成因机制具有重要意义. |
| 关键词: 博斯腾湖 新仙女木事件 湖相沉积 |
| DOI：10.18307/1999.0104 |
| 分类号: |
| 基金项目:国家自然科学基金, 49761007;新疆大学自然科学基金 |
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| Younger Dryas Cooling Event Revealed from the Section of Bosten Lake, Southern Xinjiang, China |
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ZHONG Wei
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Department of Geography, Xinjiang University, Urumqi 830046
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| Abstract: |
| One of the most dramatic climate change events is the Younger Dryas event (YD), a return to near-glacial conditions that punctuated the last deglaciation.Based chiefly on the lacustrine carbonate isotopic composition, spore-pollen and geochemical element wet-dry index C and CaCO3 analyses of Bosten Lake, southern Xinjiang, the most striking Younger Dryas cooling event (YD) during last deglaciation has been revealed.This record shows that both the onset and termination of the YD event occurred within 11.0-10.OkaBP, essentially synchronizing with Europe and Greenland, during which climate was characterized by a cold and relative humid regime.Although the mechanism for creating such abrupt and global event is not easly to be explained, the results obtained from southern Xinjiang, the aridest inland area in China, may provide some fresh insights into such abrupt climatic anomalies. |
| Key words: Bosten Lake Younger Dryas Event lacustrine deposit |
