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: Li, Chaozhu, Fu, Jianli, Yi, Liang, Zhou, Xin, Wang, Shubing, Jiang, Fuchu
• Other Authors: National Natural Science Foundation of China
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2015
• Subjects: Greenland; Hulu; Greenland ice core; ice core
• Online Access: http://dx.doi.org/10.1155/2015/592894; http://downloads.hindawi.com/journals/amete/2015/592894.pdf; http://downloads.hindawi.com/journals/amete/2015/592894.xml

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 δ 18 O from Hulu Cave, grain size of Gulang loess sequence, Chinese Loess Plateau, and Greenland ice core δ 18 O. 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.