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| 论文编号: |
86 |
| 论文题目: |
Northward extent of East Asian monsoon covaries with intensity on orbital and millennial timescales |
| 英文论文题目: |
Northward extent of East Asian monsoon covaries with intensity on orbital and millennial timescales |
| 第一作者: |
Goldsmith, Y |
| 英文第一作者: |
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| 联系作者: |
Goldsmith, Yonaton；Xu Hai |
| 英文联系作者: |
Goldsmith, Yonaton；Xu Hai |
| 外单位作者单位: |
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| 发表年度: |
2017 |
| 卷: |
114 |
| 期: |
8 |
| 页码: |
1817-1821 |
| 摘要: |
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| 英文摘要: |
The magnitude, rate, and extent of past and future East Asian monsoon (EAM) rainfall fluctuations remain unresolved. Here, late Pleistocene-Holocene EAM rainfall intensity is reconstructed using a well-dated northeastern China closed-basin lake area record located at the modern northwestern fringe of the EAM. The EAM intensity and northern extent alternated rapidly between wet and dry periods on time scales of centuries. Lake levels were 60 mhigher than present during the early andmiddle Holocene, requiring a twofold increase in annual rainfall, which, based on modern rainfall distribution, requires a similar to 400 km northward expansion/migration of the EAM. The lake record is highly correlated with both northern and southern Chinese cave deposit isotope records, supporting rainfall "intensity based"interpretations of these deposits as opposed to an alternative "water vapor sourcing"interpretation. These results indicate that EAM intensity and the northward extent covary on orbital and millennial timescales. The termination of wet conditions at 5.5 ka BP (similar to 35 m lake drop) triggered a large cultural collapse of Early Neolithic cultures in north China, and possibly promoted the emergence of complex societies of the Late Neolithic. |
| 刊物名称: |
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
| 英文刊物名称: |
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
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| 全文链接: |
http://www.pnas.org/content/114/8/1817 |
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