全新世
地质学
东亚季风
北半球
黄土
气候学
季风
西伯利亚高压
全新世气候适宜期
高纬度
东亚
自然地理学
纬度
海洋学
古生物学
地理
中国
考古
大地测量学
作者
Shugang Kang,Jinhua Du,Ning Wang,Jibao Dong,Duo Wang,Xulong Wang,Xiaoke Qiang,Yougui Song
出处
期刊:Geology
[Geological Society of America]
日期:2020-07-13
卷期号:48 (11): 1043-1047
被引量:105
摘要
Abstract Sub-orbital-scale variations of the East Asian winter monsoon (EAWM) and its mechanisms during the Holocene are controversial, partly due to the lack of high-quality records from Chinese loess. Here, we present high-resolution reconstruction of Holocene EAWM intensity based on optically stimulated luminescence dating and grain-size analysis from three loess sections taken from the Chinese Loess Plateau. The EAWM showed a persistent weakening trend during the early Holocene (ca. 11.7–6.5 kyr B.P.) and a strengthening trend during the mid- to late Holocene (since ca. 6.5 kyr B.P.). We propose that this was caused by changes in high-latitude Northern Hemisphere ice volume and middle- to high-latitude Northern Hemisphere atmospheric temperatures, respectively. We also observed an anti-correlation between EAWM and East Asian summer monsoon. Our findings provide a robust solution to the debate regarding Holocene EAWM changes and contribute to the understanding of potential future variations in EAWM intensity.
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