干旱区生态环境知识资源中心(Arid): 黄土记录的中亚干旱区东部全新世气候与环境演化

Arid

	黄土记录的中亚干旱区东部全新世气候与环境演化
其他题名	Climatic and environmental evolution during the Holocene in the eastern Arid Central Asia recorded by loess-paleosol sequences
	范义姣; 马箫忆; 刘慧; 王树源; 杨军怀; 陈梓炫; 高福元; 贾佳; 夏敦胜
来源期刊	冰川冻土
ISSN	1000-0240
出版年	2021
卷号	43 期号:3 页码:1000-0240
中文摘要	选取位于中亚干旱区东部新疆天山地区的两个典型黄土沉积剖面,通过磁学参数(chi_(ARM)/ SIRM)、亮度(L)、有机碳/氮同位素(delta~(13)C_(org)和delta~(15)N)等记录,对研究区内全新世以来的气候环境进行重建。结果表明:早全新世,chi_(ARM)/SIRM、L指示黄土成壤较弱、有机质含量低,delta~(13)C_(org)记录表明区域降水较少,共同反映该时期地表植被覆盖低、相对干旱的气候环境;中晚全新世,chi_(ARM)/SIRM、L*和delta~(13)C_(org)记录的湿度逐渐增加,黄土delta~(15)N偏正变化,指示地表生态系统生产力增强、植被覆盖增加,表明该区域气候适宜期发生在中晚全新世。中亚干旱区东部全新世以来的气候环境特征,与北半球高纬度冰盖、太阳辐射强度的变化密切相关。
英文摘要	Two typical loess-paleosol sequences(KS16 and LJW10),located in the Tianshan region of Xinjiang in the eastern Arid Central Asia(ACA),were selected to reconstruct the climatic and environmental evolution during the Holocene. The susceptibility parameters(chi_(ARM)/SIRM),lightness(L),organic carbon/nitrogen isotope(delta~(13)C_(org) and delta~(15)N)of the KS16 section(43°25'56N,83°56'35E,1 314 m a. s. l.)in the Ili Basin were analyzed comprehensively. In addition,we combined the delta~(15)N of LJW10 section(43°58'29N,85°20'10E, 1 462 m a. s. l.),located in the northern Tianshan Mountains,and the proxies(chi_(ARM)/SIRM,L,delta~(13)C_(org),delta~(15)N,) of KS16 section to reconstruct regional climatic and environmental evolution during the Holocene,which is helpful to understanding the synergistic effects of climate change and ecological environment in the eastern Arid Central Asia. The results show that:During the early Holocene,the chi_(ARM)/SIRM and L* both indicated the pedogenesis was relatively weak and the organic matter content was low in the loess,with positive delta~(13)C_(org) showed regional precipitation was limited,which reflected the low vegetation coverage and relatively arid climate environment during this period. During the middle and late Holocene,the variations of chi_(ARM)/SIRM,L* and delta~(13)C_(org) showed the moisture gradually increased,and the delta~(15)N record presented more positive,which all indicated that the climatic optimum occurred at this period. The climatic and environmental characteristics of the eastern Arid Central Asia during the Holocene are closely related to the variations of the high latitude ice sheet and the intensity of insolation in northern hemisphere.
中文关键词	黄土 ; 全新世 ; 新疆天山地区 ; 中亚干旱区东部
英文关键词	delta~(13)C_(org) delta~(15)N loess delta~(13)C_(org) delta~(15)N Holocene Tianshan region of Xinjiang eastern Arid Central Asia
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Geology
CSCD记录号	CSCD:7022453
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364913
作者单位	范义姣, 兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国.; 马箫忆, 兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国.; 刘慧, 兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国.; 王树源, 兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国.; 杨军怀, 兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国.; 陈梓炫, 兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国.; 夏敦胜, 兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国.; 高福元, 兰州城市学院地理与环境工程学院, 兰州, 甘肃 730070, 中国.; 贾佳, 浙江师范大学地理与环境科学学院, 金华, 浙江 321004, 中国.
推荐引用方式 GB/T 7714	范义姣,马箫忆,刘慧,等. 黄土记录的中亚干旱区东部全新世气候与环境演化[J],2021,43(3):1000-0240.
APA	范义姣.,马箫忆.,刘慧.,王树源.,杨军怀.,...&夏敦胜.(2021).黄土记录的中亚干旱区东部全新世气候与环境演化.冰川冻土,43(3),1000-0240.
MLA	范义姣,et al."黄土记录的中亚干旱区东部全新世气候与环境演化".冰川冻土 43.3(2021):1000-0240.