A lacustrine record of East Asian summer monsoon and atmospheric dust loading since the last interglaciation from Lake Xingkai, northeast China. Issue 1 (23rd October 2017)

• Record Type: Journal Article
• Authors: Sun, Weiwei; Shen, Ji; Yu, Shi-Yong; Long, Hao; Zhang, Enlou; Liu, Enfeng; Chen, Rong
• Is Part Of: Quaternary research. Volume 89:Issue 1(2018)
• Page Start: 270
• Page End: 280
• Publication Date: 2017-10-23
• Subjects: Asian summer monsoon, -- Dust loading, -- Westerlies, -- Grain-size, -- End member analysis, -- Lake Xingkai; Geology, Stratigraphic -- Quaternary -- Periodicals; Glacial epoch -- Periodicals; Stratigraphie -- Quaternaire -- Périodiques; Époque glaciaire -- Périodiques; Geology, Stratigraphic; Glacial epoch; Quaternary Geologic Period; Electronic journals; Periodicals; 551.79
• DOI: 10.1017/qua.2017.81
• Languages: English
• ISSNs: 0033-5894

Abstract

Abstract: A 336-cm-long sediment core spanning the last 130 ka was recovered from Lake Xingkai on the northeastern margin of the East Asian summer monsoon domain to reveal the linkage between lacustrine depositional processes and environmental changes. Bayesian end member modeling analysis was conducted to partition and interpret the grain-size distributions of Lake Xingkai sediments. Our results suggest that the sedimentary system is characterized by three end members (EMs). EM1 and EM2, with a modal value of 13 and 10 μm, respectively, indicate the variation of local hydraulic conditions. EM3, with a modal value of 5 μm, reflects the background atmospheric dust loading. High atmospheric dust concentration generally occurred during Marine Isotope Stage (MIS) 5d, MIS 4, and early MIS 3, when the climate in the Asian dust source region was cold and dry. In contrast, low dust concentration prevailed during MIS 2, likely due to the southward shift of the westerlies driven by maximum ice volume in the high latitudes.