EVIDENCE FOR ABRUPT CLIMATIC CHANGES ON NORTHWESTERN MARGIN OF EAST ASIAN MONSOON REGION DURING LAST DEGLACIATION附视频

被引：0

作者：

QIANG Mingrui LI Sen GAO Shangyu China Center of Desert Research Beijing Normal UniversityKey Laboratory of Environmental Changes and Natural Disaster the Ministry of Education of China Beijing Normal University Beijing P R China Department of Tourism Resources and Environment Foshan University Foshan P R China ^{[1
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机构：

来源：

Chinese Geographical Science | 2004年 / 02期

关键词：

last deglaciation; East Asian monsoon; abrupt climatic changes;

D O I：

暂无

中图分类号：

P467 [气候变化、历史气候];

学科分类号：

摘要：

<正> Based on investigations of the Zhongwei Nanshan aeolian section situated in the southeastern margin of Tengger Desert, carbon-14 and TL (thermoluminescence) dating results and paleoclimatie proxies such as magnetic susceptibility and grain size, we inferred that the northwestern margin of East Asian monsoon region experienced abrupt climatic changes during the last deglaciation. Six oscillation events were identified: Oldest Dryas, Bφlling, Older Dryas, Allerφd, Intra-Allerφd Cold Period (IACP) and Younger Dryas (YD). The summer monsoon was weaker during Oldest Dryas and Younger Dryas when the winter monsoon was stronger. However, during the B/A (Bφlling/Allerφd) period, the summer monsoon strengthened, reflected by magnetic susceptibility, when the winter monsoon also became strong, which is different from the paleoclimatic pattern established in the East Asian monsoon region. Furthermore, the summer monsoon was nearly in phase with the climate changes inferred from the oxygen isotopic records of

引用

页码：23 / 27

页数：5