Precisely dated multidecadally resolved Asian summer monsoon dynamics 113.5-86.6 thousand years ago
Precisely dated multidecadally resolved Asian summer monsoon dynamics 113.5-86.6 thousand years ago
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DOI：
10.1016/j.quascirev.2016.05.003
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发表时间：
2016-07
影响因子：
4
通讯作者：
Xiuyang Jiang;Xiaoyan Wang;Yaoqi He;Hsun-Ming Hu;Zhi-zhong Li;C. Spötl;Chuan‐Chou Shen
中科院分区：
文献类型：
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作者：
Xiuyang Jiang;Xiaoyan Wang;Yaoqi He;Hsun-Ming Hu;Zhi-zhong Li;C. Spötl;Chuan‐Chou Shen
我们提出了一个新的230年代亚洲夏季风（ASM）变化绝对年表，时间范围为113.5至86.6 kyr BP（公元1950年之前）。基于1435个氧同位素数据和46230个Th测年数据的综合年代际分辨率记录（2 σ误差为±0.3 kyr），可以为古气候代用序列的标定提供新的参考。三星δ 18 O记录遵循23 kyr岁差周期的日射，并被中国25 - 22个间冰期（CIS）的显著千年尺度振荡所打断，对应于格陵兰25 - 22个间冰期（GIS）。在三兴记录中，CIS 25、24、23和22的起始时间分别为113.1 ± 0.4、108.1 ± 0.3、103.7 ± 0.3和91.4 ± 0.6 kyr BP。CIS 24和CIS 22的末端分别限制在105.5 ± 0.4和87.7 ± 0.3 kyr BP。在CIS 23之前的104.1 ± 0.3 kyr BP处的百年尺度前兆事件被清楚地记录下来。这些事件在三星记录是同步的石笋从欧洲阿尔卑斯山（NALPS），除了GIS 25的开始和GIS 22的结束，并从格陵兰冰芯记录的相应的差异高达2.3 kyr。三星洞与格陵兰岛的δ 18 O记录高度相似，支持了ASM的北方强迫。三星石笋与南极冰芯δ 18 O记录的反相位关系表明，ASM与南半球存在额外的联系。
We present a new230Th-dated absolute chronology of Asian summer monsoon (ASM) variability from 113.5 to 86.6 kyr BP (before 1950 AD). This integrated multidecadally resolved record, based on 1435 oxygen isotope data and 46230Th dates with 2-sigma errors as low as ±0.3 kyr from three stalagmites collected in Sanxing Cave, southwestern China, can be a new reference for calibrating paleoclimate proxy sequences. The Sanxingδ18O record follows the 23 kyr precessional cycle of insolation and is punctuated by prominent millennial-scale oscillations of the Chinese Interstadials (CIS) 25 to 22, corresponding to Greenland Interstadials (GIS) 25 to 22. The onset of CIS 25, 24, 23 and 22 is dated to 113.1 ± 0.4, 108.1 ± 0.3, 103.7 ± 0.3 and 91.4 ± 0.6 kyr BP in the Sanxing record, respectively. The end of CIS 24 and CIS 22 is constrained to 105.5 ± 0.4 and 87.7 ± 0.3 kyr BP, respectively. A centennial-scale precursor event at 104.1 ± 0.3 kyr BP preceding CIS 23 is clearly registered. These events in the Sanxing record are synchronous with those identified in stalagmites from the European Alps (NALPS), except for the onset of GIS 25 and the end of GIS 22, and differ by up to 2.3 kyr from the corresponding ones in Greenland ice core records. The high degree of similarity of theδ18O records between Sanxing Cave and Greenland supports a Northern Hemisphere forcing of the ASM. The anti-phase relationship ofδ18O records between Sanxing stalagmites and Antarctic ice cores suggests an additional ASM linkage to the Southern Hemisphere.