干旱区生态环境知识资源中心(Arid): 光释光测年揭示浑善达克沙地中世纪暖期和小冰期环境变迁与人类活动的关系

Arid

	光释光测年揭示浑善达克沙地中世纪暖期和小冰期环境变迁与人类活动的关系
其他题名	THE RELATIONSHIP BETWEEN ENVIRONMENTAL CHANGES AND HUMAN ACTIVITIES DURING THE MEDIEVAL WARM PERIOD AND THE LITTLE ICE AGE IN OTINDAG SANDLAND BY OSL DATING
	张小艳 1; 周亚利 1; 庞奖励 1; 鹿化煜 2; 黄春长 1; 周亮 1; 顾洪亮 1
来源期刊	第四纪研究
ISSN	1001-7410
出版年	2012
卷号	32 期号:3 页码:535-546
中文摘要	为了深入了解中世纪暖期和小冰期浑善达克沙地环境变迁与人类活动的关系,对沙地5个具有代表性的风成砂砂质土剖面序列进行了光释光测年研究。结合粒度、磁化率、烧失量等气候替代性指标及地层中的文化遗存分析,得到了浑善达克沙地近2ka来的环境变迁记录:距今1.45~1.10ka和0.83~0.58ka,浑善达克沙地发育砂质土层,气候温暖湿润,与中国唐朝暖期和元朝暖期相对应,欧洲此时经历了中世纪暖期,该地自然环境条件比较优越,旱作农业文化发展。距今1.10~0.83ka和0.58~0.20ka,浑善达克沙地发育浅黄色砂层,气候干旱寒冷,沙丘活化,分别与我国宋辽和清朝冷期相对应,其中宋辽冷期是中世纪暖期的气候波动,清朝冷期则对应于欧洲小冰期,游牧文化发展。浑善达克沙地地层序列、气候替代性指标及其所保存的人类文化遗存揭示了自然环境与人类活动的相互关系。2ka以来,气候经历了暖湿与冷干的交替变化,自然环境变化影响了人类生产生活方式。沙地气候事件可能对我国相应时期朝代的兴亡产生过重大影响。服务
英文摘要	Otindag sandland is located in the middle of Inner Mongolia Plateau(112°22’ ~117°57’N,41°56’ ~44°24’E),with its present environment is arid to semiarid.The climate is mainly controlled by the East Asian monsoon atmospheric circulation in this region.The earth surface processes,such as dune systems,are sensitive to both climatic changes and human impacts.In order to better understand the interaction of these factors in Otindag sandland during the Medieval Warm Period and the Little Ice Age, optically stimulated luminescence dating(OSL)has been used to obtain ages of five typical dune sediment sequences,which are LQD(42.26°N,116.13°E),S308-132km(42.39°N,115.39°E),HSZN(42.08°N,116.44°E),DLGES(43.56°N,115.68°E) and JPW-A(43.24°N,117.45°E),with the thickness as 2.0m,1.4m,3.0m,2.2m and 0.8m,respectively.OSL dating on quartz grains at the size of 90 ~150mum were carried out by using the single aliquot regenerative-dose(SAR)protocol. Combined with the characteristics of grain-size distribution, magnetic susceptibility,ignition loss from the sediment and the pottery sherds which were found in LQD and JPW-A sediment sequences,paleoenvironmental changes were reconstructed since 2ka in Otindag sandland.Sandy soil with greater value of silt and clay content,magnetic susceptibility,and loss on ignition were developed in the episode of 1.45 ~1.10ka and 0.83 ~0.58ka,while yellow sand layer with more coarse grain,less silt and clay and magnetic susceptibility as well as loss on ignition were developed at 1.10 ~0.83ka and 0.58 ~0.20ka.The development of sandy soil represents wetter and warmer conditions,leading to the increase of vegetation coverage and much less aeolian activity.These phases were the warming periods of Tang Dynasty and the Yuan Dynasty in Chinese history correlating with the Medieval Warming Period in Europe.In that time,the ideal natural environment helped the great development of the culture of dry fanning agriculture.The activation of dunes with sand deposit indicates colder and drier climate,resulting in the lower vegetation coverage and the desertification.These periods are consistent with Song Dynasty and Qing Dynasty,respectively,in China history.Especially,the range of 0.58 ~0.20ka is corresponding to the Little Ice Age when nomadic culture was developed in this region.Since 2ka,human activity such as living and cultivation depended greatly on natural environmental changes.During warming periods,dry farming culture was developed with flourishing civilization.In cold and dry periods,nomadic culture was dominant and the lack of production could trigger off famine and drought,as well as the war between northern and southern flocks,leading to social upset.
中文关键词	浑善达克 ; 光释光测年 ; 环境变化 ; 人类活动
英文关键词	Otindag sandland OSL dating environmental change human activities
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:4551721
来源机构	陕西师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227920
作者单位	1.陕西师范大学旅游与环境学院, 西安, 陕西 710062, 中国; 2.南京大学地理与海洋科学学院, 南京, 江苏 210093, 中国
推荐引用方式 GB/T 7714	张小艳,周亚利,庞奖励,等. 光释光测年揭示浑善达克沙地中世纪暖期和小冰期环境变迁与人类活动的关系[J]. 陕西师范大学,2012,32(3):535-546.
APA	张小艳.,周亚利.,庞奖励.,鹿化煜.,黄春长.,...&顾洪亮.(2012).光释光测年揭示浑善达克沙地中世纪暖期和小冰期环境变迁与人类活动的关系.第四纪研究,32(3),535-546.
MLA	张小艳,et al."光释光测年揭示浑善达克沙地中世纪暖期和小冰期环境变迁与人类活动的关系".第四纪研究 32.3(2012):535-546.