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引用本文:王永波,刘兴起,羊向东,张恩楼,Ryo Matsumoto.可可西里库赛湖揭示的青藏高原北部近4000年来的干湿变化.湖泊科学,2008,20(5):605-612. DOI:10.18307/2008.0509
WANG Yong-bo,LIU Xing-qi,YANG Xiang-dong,ZHANG En-lou,Ryo Matsumoto.A 4000-year moisture evolution recorded by sediments of Lake Kusai in the Hoh Xil area, northern Tibetan Plateau. J. Lake Sci.2008,20(5):605-612. DOI:10.18307/2008.0509
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可可西里库赛湖揭示的青藏高原北部近4000年来的干湿变化
王永波1,2, 刘兴起1, 羊向东1, 张恩楼1, Ryo Matsumoto3
1.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;2.中国科学院研究生院, 北京 100049;3.Department of Earth and Planetary Science, Tokyo University, Tokyo 113, Japan
摘要:
通过青藏高原北部可可西里库赛湖KS-2006孔(深637cm)沉积岩芯总有机碳、总氮含量及沉积物粒度变化的研究,恢复了该地区近4000年来的干湿变化历史.结果表明,该地区近4000年来经历了显著的干湿变化,干旱时段出现在3900-3590cal aBP、3320-2630cal aBP、1720-1420cal aBP及1100-840cal aBP期间;湿润时段出现在3590-3320cal aBP、2630-1720cal aBP、1420-1100cal aBP以及840cal aBP之后小冰期有效降水升高的相对湿润时期.区域对比分析表明库赛湖地区近4000年来的干湿变化受亚洲季风影响;同时,该地区存在明显的中世纪暖期及小冰期的三次降温事件记录.
关键词:  库赛湖  总有机碳  总氮  粒度  干湿变化  青藏高原北部
DOI:10.18307/2008.0509
分类号:
基金项目:国家重点基础研究发展计划(973)子课题(2005CB422002)
A 4000-year moisture evolution recorded by sediments of Lake Kusai in the Hoh Xil area, northern Tibetan Plateau
WANG Yong-bo1,2, LIU Xing-qi1, YANG Xiang-dong1, ZHANG En-lou1, Ryo Matsumoto3
1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China;2.Graduate School of Chinese Academy of Sciences, Beijing 100049, P.R.China;3.Department of Earth and Planetary Science, Tokyo University, Tokyo 113, Japan
Abstract:
Lake Kusai lies in the Hoh Xil area, northern Tibetan Plateau. Based on the analyses of Total Organic Carbon content (TOC), Total Nitrogen content (TN) and Grain Size of sediments from Core KS-2006, this paper mainly analyzed the moisture variability in this area during the past 4000 years. The results showed that the moisture evolution of this area in the past 4000 years experienced the stages as follow: dry periods: 3900-3590 cal aBP, 3320-2630cal aBP, 1720-1420cal aBP and 1100-840cal aBP; humid periods: 3590-3320cal aBP, 2630-1720cal aBP, 1420-1100cal aBP and after 840cal aBP. Our results were generally consistent with the climatic changes inferred from the Oxygen Isotope, Dongge Cave, which indicates that the climate in northern Tibetan Plateau was also controlled by the Asian Monsoon. Additionally, Medieval Warm Period and Little Ice Age were well recorded in Lake Kusai as well.
Key words:  Lake Kusai  TOC  TN  Grain size  moisture variability  northern Tibetan Plateau
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