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题名: Climatic and environmental change in Yanchi Lake, Northwest China since the Late Glacial: A comprehensive analysis of lake sediments
作者: Li, Y; Wang, NA(王乃昂); Li, ZL(李卓仑); Zhou, XH; Zhang, CQ
收录类别: SCIE ; CSCD
出版日期: 2013-10
刊名: JOURNAL OF GEOGRAPHICAL SCIENCES
卷号: 23, 期号:5, 页码:932-946
期刊主办单位: 中国地理学会 ; 中国科学院地理科学与资源研究所
出版者: SCIENCE CHINA PRESS
出版地: BEIJING
英文摘要: Modern climate research has shown that the Asian summer monsoon water vapor transport is limited to the eastern part of the Qilian Mountains. On the Holocene millennial-scale, whether the northwest boundary of the summer monsoon varies according to climate change is a key scientific issue. Yanchi Lake is located in the northern Qilian Mountains and the middle of the Hexi Corridor, where the modern climate is less affected by the Asian summer monsoon. It is a key research area for examining the long-term variations of the Asian summer monsoon. Paleoclimatic data, including AMS C-14 dates of pollen concentrates and bulk organic carbon, lithology, grain-size, mineral composition and geochemical proxies were acquired from sediments of Yanchi Lake. The chronological results show that the lower part of the lacustrine section is formed mainly in the Late Glacial and early Holocene period, while the proxies' data indicate the lake expansion is associated with high content of mineral salts. The middle part of this section is formed during the transitional period of the early and middle Holocene. Affected by the reworking effect, the pollen concentrates AMS 14C dates from the middle part of the section are generally older than those from the lower part. Since the mid-Holocene, Yanchi Lake retreated significantly and the deposition rate dropped obviously. The Yanchi Lake record is consistent with the Late Glacial and Holocene lake records in the Qinghai-Tibet Plateau and the climatic records in typical monsoon domain, which indicate the lake expansion and the strong Asian summer monsoon during the Late Glacial and early Holocene. The long-term monsoonal pattern is different from the lake evolution in Central Asia on the Holocene millennial-scale. This study proves the monsoon impacts on the northwestern margin of the summer monsoon, and also proves the fact that the northern boundary of the summer monsoon moves according to millennial-scale climate change.
关键词: Yanchi Lake ; Asian summer monsoon ; Holocene ; the Late Glacial ; lake sediments ; monsoon marginal zones
作者部门: [Li Yu ; Wang Nai'ang ; Li Zhuolun ; Zhou Xuehua ; Zhang Chengqi] Lanzhou Univ, Coll Earth & Environm Sci, Ctr Hydrol Cycle & Water Resources Arid Reg, Lanzhou 730000, Peoples R China
通讯作者: Li, Y (reprint author), Lanzhou Univ, Coll Earth & Environm Sci, Ctr Hydrol Cycle & Water Resources Arid Reg, Lanzhou 730000, Peoples R China.
学科分类: Physical Geography
文章类型: Article
所属项目编号: National Natural Science Foundation of China [41001116] ; Fundamental Research Fund for the Central Universities [lzujbky-2013-127, lzujbky-2013-129]
所属项目名称: 国家自然科学基金项目 ; 中央高校基本科研业务费专项资金
项目资助者: NSFC ; LZU
语种: 英语
DOI: 10.1007/s11442-013-1053-3
ISSN号: 1009-637X
WOS记录号: WOS:000323077400011
CSCD记录号: CSCD:5021279
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/120308
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Li, Y,Wang, NA,Li, ZL,et al. Climatic and environmental change in Yanchi Lake, Northwest China since the Late Glacial: A comprehensive analysis of lake sediments[J]. JOURNAL OF GEOGRAPHICAL SCIENCES,2013,23(5):932-946.
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