伍婧^1,2,,
刘强^1,2,
毛礼米³,
朱泽阳^1,2,4,
旺罗^1,2,
储国强^1,2,5,
刘嘉麒^1,2,4
1. 中国科学院地质与地球物理研究所, 中国科学院新生代地质与环境院重点实验室, 北京 100029
2. 中国科学院地球科学研究院, 北京 100029
3. 中国科学院南京地质古生物研究所, 江苏 南京 210008
4. 中国科学院大学, 北京 100049
5. 中国科学院生物演化与环境卓越创新中心, 北京 100044

基金项目: 国家自然科学基金面上项目(批准号:41572353和41272392)资助


详细信息

作者简介: 伍婧, 女, 37岁, 博士/助理研究员, 湖泊研究和气候变化, E-mail:wujing@mail.iggcas.ac.cn

中图分类号: P941.78;Q913.84;P534.63;P532

收稿日期:2019-03-28
修回日期:2019-05-18
刊出日期:2019-07-30

Characteristics of the Younger Drays event in the Great Khingan Mountains area

Wu Jing^1,2,,
Liu Qiang^1,2,
Mao Limi³,
Zhu Zeyang^1,2,4,
Wang Luo^1,2,
Chu Guoqiang^1,2,5,
Liu Jiaqi^1,2,4
1. Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029
2. Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029
3. Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences, Nanjing 210008
4. University of Chinese Academy of Sciences, Beijing 100049
5. CAS Center for Excellence in Life and Paleoenvironment, Beijing 100044


MSC: P941.78;Q913.84;P534.63;P532

--> Received Date: 28 March 2019
Revised Date: 18 May 2019
Publish Date: 30 July 2019


摘要
摘要:新仙女木事件是末次冰消期期间发生的一次气候转冷事件，该事件对整个北半球的中高纬度地区的气候变化有明显的影响。然而，在该事件造成东亚中高纬地区温度下降的统一认识下，对于其季节性特征仍较为缺乏认识。本文用大兴安岭中部月亮湖末次冰消期多指标记录，揭示了大兴安岭地区在新仙女木事件期间植被中的北方针叶林成分增加、森林发育、冬季温度下降、东亚冬季风明显增强。
关键词: 新仙女木事件/
东亚冬季风/
植被/
大兴安岭地区

Abstract:The Younger Drays event is a cold event that occurred during the last deglaciation, which has a significant impact on climate change in the mid-high latitudes of the Northern Hemisphere. However, under the unified understanding of the cooling in the mid-high latitudes of East Asia, there is still a lack of understanding of its seasonal characteristics. In this paper, the stomata, pollen, total organic carbon, δ¹³C_org and grain size records from the time interval 15.0~10.8 ka B. P. (corresponding to 545~731 cm depth in the lake sediment core) of the last deglaciation of Lake Moon (47°30'25"N, 120°52'05"E) in the central part of the Great Khingan Mountains area were presented. The results show that the influx of Larix stomata increased, the pollen percentage of deciduous broad-leaved decreased versus steppe increased from 11.8 ka B. P. to 12.8 ka B. P., which reveal that the composition of the boreal coniferous forest in the Greater Khingan Mountains area increased, the forest developed during the Younger Dryas event. Compared to the B?lling-Aller?d warming and the Early Holocene, the values of total organic carbon from Lake Moon from 11.8 ka B. P. to 12.8 ka B. P. are medium, the values of δ¹³C_org are lightest and the values of grain size are finest. These results also support that the environment did not deteriorate during the Younger Dryas event in study area, which imply a moderate summer. The comparison with other records in East Asia shows that the winter temperature decreased, and the East Asian winter monsoon increased significantly during the Younger Drays event.
Key words:Younger Drays event/
East Asian Winter Monsoon/
vegetation change/
Great Khingan Mountains



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