干旱区生态环境知识资源中心(Arid): 距今220 ka以来大同盆地沉积物磁化率反映的气候变化

Arid

	距今220 ka以来大同盆地沉积物磁化率反映的气候变化
其他题名	Climate change reflected by the magnetic susceptibility within the deposit sediment in Datong Basin, North China, since 220 ka BP
	苏志珠 1; 杨宗园 1; 李晋昌 2
来源期刊	冰川冻土
ISSN	1000-0240
出版年	2015
卷号	37 期号:2 页码:401-407
中文摘要	大同盆地地处我国季风影响的北部边缘, 第四纪以来盆地内发育厚层的河湖相地层, 其上覆盖马兰黄土或全新世沉积, 蕴含着丰富的气候环境变迁信息, 是研究气候环境变化的理想场所. 在对盆地内地层考察的基础上, 对晚近地质时期河湖相与风成相互层沉积剖面的磁化率、粒度变化进行了分析. 结果表明: 220 ka BP以来大同盆地气候变化经历了中更新世(220~199 ka BP)暖湿期、中更新世(199~138 ka BP)干冷期、末次间冰期(138~71 ka BP)暖湿期、末次冰期(71~11 ka BP)干冷期、全新世(11 ka BP至今)频繁的干冷暖湿波动变化过程, 每个阶段仍有次一级的气候波动. 大同盆地这种气候变化与深海氧同位素以及我国北方萨拉乌苏河地区、岱海等地揭示的气候变化有很好的对应, 反映出本区气候变化是对全球冰期-间冰期气候波动的响应.
英文摘要	Datong Basin is located in an edge of East Asian monsoon zone, North China, and is characterized by a fragile ecotone, which sensitively responses to global change. So, the basin is an ideal site for researching global change in China. Commonly, magnetic susceptibility would well reflect environment change and has been widely applied to research Quaternary environment and climate change. A profile (DT Profile) in Datong Basin was ideally selected to study the climate change in North China. The magnetic susceptibility in the profile all indicated that the climate in North China has been very unstable since the middle Pleistocene, with frequent climate changes in different time periods. The climates in the Ice Age or in the Interglacial Period were unstable. The climate indexes in the DT Profile showed that there were several climatic fluctuations in each phase. These climate changes were well accordant with the global climate change reflected by the deep-sea oxygen isotope records and the records in polar ice cores, as well as that recorded in desert and loess depositions and evidences from the Salawusu River basin and Daihai Lake, showing a consistency in time of climate change between the study area and outside. The main factors that control the climate of the study area is East Asian monsoon.
中文关键词	大同盆地 ; 磁化率 ; 气候变化
英文关键词	220 ka BP Datong Basin magnetic susceptibility climate change 220 ka BP
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:5471463
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232360
作者单位	1.山西大学旅游学院, 太原, 山西 030006, 中国; 2.山西大学黄土高原研究所, 太原, 山西 030006, 中国
推荐引用方式 GB/T 7714	苏志珠,杨宗园,李晋昌. 距今220 ka以来大同盆地沉积物磁化率反映的气候变化[J],2015,37(2):401-407.
APA	苏志珠,杨宗园,&李晋昌.(2015).距今220 ka以来大同盆地沉积物磁化率反映的气候变化.冰川冻土,37(2),401-407.
MLA	苏志珠,et al."距今220 ka以来大同盆地沉积物磁化率反映的气候变化".冰川冻土 37.2(2015):401-407.