期刊
QUATERNARY RESEARCH
卷 89, 期 1, 页码 270-280出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/qua.2017.81
关键词
Asian summer monsoon; Dust loading; Westerlies; Grain-size; End member analysis; Lake Xingkai
资金
- National Natural Science Foundation of China [41430530, 41621002]
- Chinese Academy of sciences [KZZD-EW-TZ-08]
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 m, respectively, indicate the variation of local hydraulic conditions. EM3, with a modal value of 5 m, 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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据