Millennial-scale Asian summer monsoon variations in South China since the last deglaciation

Millennial-scale Asian summer monsoon variations in South China since the last deglaciation
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末次冰消以来华南千年尺度亚洲夏季风变化

DOI:
10.1016/j.epsl.2016.07.006
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发表时间:
2016-10
影响因子:
5.3
通讯作者:
Yang, Zhenyu
Yang, Zhenyu
中科院分区:
地球科学1区
文献类型:
--
作者:
Tang, Ling;Su, Youliang;Pei, Junling;Yang, Zhenyu

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研究亚洲夏季风的时空变化特征对于全面了解其行为、动力和未来影响至关重要。目前对华南末次冰期以来ASM变化的认识主要依赖于几个精确定年的洞穴沉积物稳定氧同位素(δ 18 O)记录。尽管这些洞穴沉积物δ 18 O信号为区域过去的环境变化提供了有用的证据,但其指示ASM强度的有效性仍然存在很大争议。湖光岩玛珥湖(HML)提供了自末次冰期以来南亚和东亚热带-亚热带地区环境和气候变化的最完整档案之一。在这里,我们记录了一个连续的百年到千年规模的ASM记录在过去的16千BP的高沉积速率HML沉积物。与中国洞穴沉积物δ 18 O信号和中国黄土季风降水代用指标的低振幅变化相反,我们的多代用指标记录揭示了一种高振幅的区域气候波动模式,包括Bølling-Allerød变暖、8.2 ka冷却事件和6.5-5.9 ka气候突变期间的细尺度振荡。Bond-like冷/干事件的存在表明北大西洋环流对低纬季风变化的明显影响。HML古代用指标、中国洞穴沉积物δ 18 O记录和整个全新世北方半球夏季日照的广泛可比性表明,太阳日照对ASM变化有着深刻的影响。这些研究结果加强了一个模型的太阳辐射和冰川强迫的ASM。
Characterizing spatiotemporal variability of the Asian summer monsoon (ASM) is critical for full understanding of its behavior, dynamics, and future impacts. The present knowledge about ASM variations since the last glaciation in South China largely relies on several precisely-dated speleothem stable oxygen isotope (δ 18 O) records. Although these speleothem δ 18 O signals provide useful evidence for regional past environmental changes, their validity for denoting ASM intensity remains a great controversy. The Huguangyan Maar Lake (HML) provides one of the most complete archives of environmental and climatic changes in the tropical–subtropical South and East Asia since the last glaciation. Here we document a continuous centennial-to millennial-scale ASM record over the past 16 ky BP from the high-sedimentation-rate HML sediments. In contrast with the low-amplitude variations of Chinese speleothem-derived δ 18 O signals and the Chinese loess-based monsoon precipitation proxy indexes, our multi-proxy records reveal a pattern of high-amplitude regional climatic fluctuations, including fine-scale oscillations during the Bølling–Allerød warming, the 8.2 ka cooling event, and an abrupt climate shift from 6.5–5.9 ka. The existence of Bond-like cold/dry events indicates a distinct influence of the North Atlantic circulation on low-latitude monsoon changes. The broad comparability between the HML paleo-proxies, Chinese speleothem δ 18 O records, and the northern hemisphere summer insolation throughout the Holocene, suggests that solar insolation exerts a profound influence on ASM changes. These findings reinforce a model of combined insolation and glacial forcing of the ASM.
DOI: 10.1002/grl.50740
发表时间: 2013-11
影响因子: 5.2
作者:
Ji Shen;Xudong Wu;Zhaohui Zhang;Weiming Gong;T. He;Xiaomei Xu;Hailiang Dong
通讯作者: Ji Shen;Xudong Wu;Zhaohui Zhang;Weiming Gong;T. He;Xiaomei Xu;Hailiang Dong
DOI: 10.1007/s11434-009-0720-3
发表时间: 2009-12
期刊: Chinese Sciences Bulletin
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作者:
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通讯作者: Li ShuangLin
DOI: 10.1038/srep08001
发表时间: 2015-01-23
期刊: Scientific reports
影响因子: 4.6
作者:
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通讯作者: Zhu R
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DOI: 10.1038/srep08801
发表时间: 2015-03-05
期刊: Scientific reports
影响因子: 4.6
作者:
Chu B;Wu T;Miao L;Mei Y;Wu M
通讯作者: Wu M
DOI: 10.1016/s0277-3791(01)00145-7
发表时间: 2002-04
影响因子: 4
作者:
J. Teller;D. Leverington;J. Mann
通讯作者: J. Teller;D. Leverington;J. Mann