Millennial-Scale Asian Monsoon Influenced Longjie Lake Evolution during Marine Isotope Stage 3, Upper Stream of Changjiang (Yangtze) River, China

• Published in: Advances in Meteorology
• Main Authors: Chaozhu Li, Jianli Fu, Liang Yi, Xin Zhou, Shubing Wang, Fuchu Jiang
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2015
• Subjects: Meteorology. Climatology; QC851-999; Greenland; Hulu; Greenland ice core; ice core
• Online Access: https://doi.org/10.1155/2015/592894; https://doaj.org/article/8c845383fe7d4a6db4d7143e4484d6a3

Millennial-scale climate change in Asian monsoon region during MIS 3 has been studied using stalagmite, loess, and peat sediments. However, records from more materials are essential to further illustrate dynamics of these events. In the present study, a time-series of grain size covering 60–30 ka was reconstructed from lake sediments in the Yunnan Province, southwestern China. The time-series contains 14 obvious millennial-scale events during the period. On millennial-scale, the grain size record is generally consistent with mean stalagmite δ18O from Hulu Cave, grain size of Gulang loess sequence, Chinese Loess Plateau, and Greenland ice core δ18O. The results show that the millennial-scale variation was well compared with the Dansgaard-Oeschger (DO) events, indicating that those global events were well documented in lake sediments in the Asian monsoon region. Because the grain size can be used as a proxy for water discharge, we suggest that signal of the DO events might be transmitted to lake evolution by Asian monsoon.