干旱区生态环境知识资源中心(Arid): 瓦窑沟剖面记录的早中全新世毛乌素沙地东南缘气候变化

Arid

	瓦窑沟剖面记录的早中全新世毛乌素沙地东南缘气候变化
其他题名	Early and Middle Holocene climate change inferred byWayaogou Section in the Southeastern Mu Us Desert
	马晓慧; 庞奖励; 刘小槺; 丁丹; 岳晓晓; 贾飞飞
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2021
卷号	41 期号:5 页码:71-80
中文摘要	毛乌素沙地位于中国东亚季风边缘区,对气候变化响应敏感。区域内分布着大量河湖相沉积地层,忠实记录了全新世以来气候变化状况。选取毛乌素沙地东南缘河湖相沉积地层为主的瓦窑沟剖面(WYG),在光释光(OSL)和~(14)C(AMS ~(14)C)测年基础上,对粒度、色度和有机质环境代用指标进行分析,反演得出毛乌素沙地早中全新世气候经历了3个阶段:约9.8 ka BP前气候干冷,广泛沉积沙层;9.8-9.6 ka BP气候逐渐回暖,为气候干冷转为暖湿的过渡期;9.6-5.2 ka BP气候相对暖湿,发育砂质泥炭层。推测计算得出,剖面地层沉积速率沙层>过渡层>砂质泥炭层,且各地层均存在次一级旋回,曲线旋回周期砂质泥炭层(480 a)>沙层(150 a)>过渡层(130 a),指示砂质泥炭层沉积速率最慢、形成时期气候相对稳定。研究结果与东亚季风区域古气候记录具有很好的可比性,是对东亚冬夏季风强度变化的全球性响应。
英文摘要	Mu Us Desert is located in the edge of East Asian monsoon in China,which is sensitive to climate changes. There are a large number of fluvial and lacustrine sedimentary strata in the area,which faithfully records the climate change since the Holocene. We analyzed the section of fluvio-lacustrine sediments(WYG)in the southeastern edge of Mu Us Desert,based on OSL and AMS ~(14)C dating,in combination with environmental proxy indicators including grain size,chromaticity and organic matter. The results showed that the climate of Mu Us Desert experienced three stages in the early and middle Holocene:Before 9.8 ka BP,the climate was colddry, with extensive deposition of sand;9.8-9.6 ka BP,the climate warmed up gradually,which was the transition period from cold-dry to warm-wet;9.6-5.2 ka BP,the climate was warm-wet relatively,and peat developed. It is calculated that the order of sedimentary rate of the section is sandy > transition layer > sandy peat layer. And there are secondary cycles in each layer,The cycle length of each layer is sandy peat layer(480 a/time)> sand layer(150 a/time)and > transition layer(130 a/time)from large to small,indicating that the sedimentary rate of sandy peat layer is the slowest and the climate is relatively stable during the formation period. The results of this study are in good contrast with the paleoclimatic records of other deserts in the East Asian monsoon region, which is a global response to the changes in the intensity of the East Asian winter and summer monsoon.
中文关键词	瓦窑沟剖面 ; 早中全新世 ; 毛乌素沙地 ; 东南缘 ; 气候变化
英文关键词	Wayaogou section early and middle Holocene Mu Us Desert the southeast edge climate change
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Geology
CSCD记录号	CSCD:7060262
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378109
作者单位	马晓慧, 陕西师范大学地理科学与旅游学院, 西安, 陕西 710119, 中国.; 庞奖励, 陕西师范大学地理科学与旅游学院, 西安, 陕西 710119, 中国.; 刘小槺, 陕西师范大学地理科学与旅游学院, 西安, 陕西 710119, 中国.; 丁丹, 陕西师范大学地理科学与旅游学院, 西安, 陕西 710119, 中国.; 岳晓晓, 陕西师范大学地理科学与旅游学院, 西安, 陕西 710119, 中国.; 贾飞飞, 辽宁师范大学城市与环境学院, 大连, 辽宁 116029, 中国.
推荐引用方式 GB/T 7714	马晓慧,庞奖励,刘小槺,等. 瓦窑沟剖面记录的早中全新世毛乌素沙地东南缘气候变化[J],2021,41(5):71-80.
APA	马晓慧,庞奖励,刘小槺,丁丹,岳晓晓,&贾飞飞.(2021).瓦窑沟剖面记录的早中全新世毛乌素沙地东南缘气候变化.中国沙漠,41(5),71-80.
MLA	马晓慧,et al."瓦窑沟剖面记录的早中全新世毛乌素沙地东南缘气候变化".中国沙漠 41.5(2021):71-80.