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题名: Humid medieval warm period recorded by magnetic characteristics of sediments from Gonghai Lake, Shanxi, North China
作者: Liu, JB(刘建宝); Chen, FH(陈发虎); Chen, JH(陈建徽); Xia, DS(夏敦胜); Xu, QH; Wang, ZL(王宗礼); Li, YC
收录类别: SCIE ; BIOSIS
出版日期: 2011-08
刊名: CHINESE SCIENCE BULLETIN
卷号: 56, 期号:23, 页码:2464-2474
期刊主办单位: 中国科学院
出版者: SCIENCE CHINA PRESS
出版地: BEIJING
英文摘要: Variations in monsoon strength, moisture or precipitation in eastern China during the MWP reflected by different climatic records have shown apparent discrepancies. Here, detailed environmental magnetic investigations and mineralogical analyses were conducted on lacustrine sediments of Core GH09B1 (2.8 m long) from Gonghai Lake, Shanxi, North China, concerning the monsoon history during the MWP. The results demonstrate that the main magnetic mineral is magnetite. The sediments with relatively high magnetic mineral concentrations were characterized by relatively fine magnetic grain sizes, which were formed in a period of relatively strong pedogenesis and high precipitation. In contrast, the sediments with low magnetic mineral concentrations reflected an opposite process. The variations of magnetic parameters in Gonghai Lake sediments were mainly controlled by the degree of pedogenesis in the lake drainage basin, which further indicated the strength of the Asian summer monsoon. The variations in the chi and S (-300) parameters of the core clearly reveal the Asian summer monsoon history over the last 1200 years in the study area, suggesting generally abundant precipitation and a strong summer monsoon during the Medieval Warm Period (MWP, AD 910-1220), which is supported by pollen evidence. Furthermore, this 3-6-year resolution environmental magnetic record indicates a dry event around AD 980-1050, interrupting the generally humid MWP. The summer monsoon evolution over the last millennium recorded by magnetic parameters in sediments from Gonghai Lake correlates well with historical documentation (North China) and speleothem oxygen isotopes (Wanxiang Cave), as well as precipitation modeling results (extratropical East Asia), which all indicate a generally humid MWP within which centennial-scale moisture variability existed. It is thus demonstrated that environmental magnetic parameters could be used as an effective proxy for monsoon climate variations in high-resolution lacustrine sediments.
关键词: Gonghai Lake ; lacustrine sediments ; magnetic parameter ; Medieval Warm Period ; humid climate
作者部门: [Liu JianBao ; Chen FaHu ; Chen JianHui ; Xia DunSheng ; Wang ZongLi] Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Peoples R China ; [Xu QingHai ; Li YueCong] Hebei Normal Univ, Coll Resources & Environm, Shijiazhuang 050016, Peoples R China
通讯作者: Chen, FH (reprint author), Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Peoples R China.
学科分类: Science & Technology - Other Topics
文章类型: Article
所属项目编号: National Basic Research Program of China [2010CB950202] ; National Natural Science Foundation of China [40971056, 41001114]
所属项目名称: 国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划)
项目资助者: NSFC ; MOST
语种: 英语
DOI: 10.1007/s11434-011-4592-y
ISSN号: 1001-6538
WOS记录号: WOS:000292928700010
BIOSIS记录号: BIOSIS:PREV201100516455
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/120090
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Liu, JB,Chen, FH,Chen, JH,et al. Humid medieval warm period recorded by magnetic characteristics of sediments from Gonghai Lake, Shanxi, North China[J]. CHINESE SCIENCE BULLETIN,2011,56(23):2464-2474.
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