干旱区生态环境知识资源中心(Arid): Climate change inferred from aeolian sediments in a lake shore environment in the central Tibetan Plateau during recent centuries

Arid

	Climate change inferred from aeolian sediments in a lake shore environment in the central Tibetan Plateau during recent centuries
	Liu Benli; Qu Jianjun; Kang Shichang; Liu Bing
来源期刊	Sciences in Cold and Arid Regions
ISSN	1674-3822
出版年	2018
卷号	10 期号:2 页码:134-144
英文摘要	Studies of the past climate variation on the Tibetan Plateau(TP) are currently limited in number and low in density and temporal resolution. We investigated the climate condition from about 400 years before present(B.P.) in the central TP at the shore of Co(means "lake") Nag using aeolian sediments. A 2.7-m sand profile with 57 sediment samples and six optically stimulated luminescence(OSL) samples were studied through grain-size analysis, geochemical elements and parameters, and depositional rate estimation. A previous assumption was verified that sand deposition at the shore of Lake Co Nag originated from hills to the east. Two significant wet periods between 90-140 and about 380 years B.P. were indicated by the variation of element profiles and sediment depositional rates. Aeolian activity is sensitive to variations from different seasonal changing patterns of climate factors in the study area, and aeolian sediments respond differently to climate conditions during the cold little ice age(LIA) and the warm 20th century. Present day dry seasons of winter and spring might be much warmer and drier compared to seasons of 400 years ago although summer precipitation has increased, resulting in significantly more aeolian activity and higher depositional rate(about 6 times compared to 380-240 years ago) of sandy sediments. Aeolian problems like blown-sand deposition and desertification may be worse in a projected warming future in the central TP as well as other cold and high altitude regions. Our results suggest an agreement with environmental evolution during the little ice age and the 20th century in a broader scale on the TP.
英文关键词	Tibetan Plateau aeolian sediments geochemical element OSL dating
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Geology
CSCD记录号	CSCD:6228009
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335942
作者单位	Liu Benli, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences;;Dunhuang Gobi Desert Ecological and Engineering Research Station, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Qu Jianjun, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences;;Dunhuang Gobi Desert Ecological and Engineering Research Station, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Liu Bing, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences;;Dunhuang Gobi Desert Ecological and Engineering Research Station, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Kang Shichang, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, State Key Laboratory of Cryospheric S...
推荐引用方式 GB/T 7714	Liu Benli,Qu Jianjun,Kang Shichang,et al. Climate change inferred from aeolian sediments in a lake shore environment in the central Tibetan Plateau during recent centuries[J],2018,10(2):134-144.
APA	Liu Benli,Qu Jianjun,Kang Shichang,&Liu Bing.(2018).Climate change inferred from aeolian sediments in a lake shore environment in the central Tibetan Plateau during recent centuries.Sciences in Cold and Arid Regions,10(2),134-144.
MLA	Liu Benli,et al."Climate change inferred from aeolian sediments in a lake shore environment in the central Tibetan Plateau during recent centuries".Sciences in Cold and Arid Regions 10.2(2018):134-144.