Organic geochemical investigations of the Dali Lake sediments in northern China: Implications for environment and climate changes of the last deglaciation in the East Asian summer monsoon margin

doi:10.1016/j.jseaes.2017.04.011

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院新生代地质与环境重点实验室

	Organic geochemical investigations of the Dali Lake sediments in northern China: Implications for environment and climate changes of the last deglaciation in the East Asian summer monsoon margin
	Fan, Jiawei 1; Xiao, Jule 1,2; Wen, Ruilin 1; Zhang, Shengrui 1; Wang, Xu 1; Cui, Linlin 1; Yamagata, Hideki 3
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2017-06-01
卷号	140 页码:135-146
关键词	Dali Lake Sedimentary organic matter Environment Climate East Asian summer monsoon Last deglaciation
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2017.04.011
文献子类	Article
英文摘要	Millennial-scale environment and climate changes in the East Asian summer monsoon margin during the last deglaciation are reconstructed by systematic studies on the characteristic of sedimentary organic matter from Dali Lake in northern China. Concurrent increases in the TOC and TN concentrations indicate increases in terrestrial organic matter and nutrient inputs to the lake and a development of terrestrial vegetation and phytoplankton productivity related to increases in regional temperature and precipitation. C/N ratios reflect changes in the proportions of terrestrial and aquatic organic matter. Decreases in both delta C-13(org) and delta N-15 values indicate increases in the isotopically lighter, terrestrial carbon and nitrogen inputs to the lake, due to increases in surface runoffs; while a sharp decrease in the delta N-15 value implies a significant weakening in the biological activities of nitrifying and amonifying bacteria, due to abrupt decrease in the water temperature. The geochemical data indicate that regional temperature and precipitation exhibited increasing trends from 15,000 to 12,350 cal yr BP; temperature decreased abruptly at 12,350 cal yr BP and then maintained a low level from 12,350 to 11,400 cal yr BP, precipitation decreased to a relatively low level from 12,350 to 11,400 cal yr BP; and both temperature and precipitation returned to increase after 11,400 cal yr BP. The climate change in the Dali Lake region during the last deglaciation corresponds, within age uncertainties, to the Bolling-Allerod (BA) warm phase and Younger Dryas (YD) cold reversal occurring over northern high latitudes. However, the gradual and mild increasing trends of regional temperature and precipitation during the BA warm period contrasts with the general cooling trend in northern high latitude temperature, implying a dominant influence from increases in the Northern Hemisphere summer insolation; while the slight decreases in regional precipitation relative to the rapid and significant decreases in northern high latitude temperature during the YD cold period may have resulted from local moisture recycling or from an insensitive response of hydrology and ecology to the regional precipitation change.
WOS关键词	CARBON-ISOTOPE FRACTIONATION ; BLUE-GREEN-ALGAE ; TIBETAN PLATEAU ; HIGH-RESOLUTION ; YOUNGER DRYAS ; AQUATIC PLANTS ; HOLOCENE ; MATTER ; RECORD ; PHOTOSYNTHESIS
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000405154200010
资助机构	National Natural Science Foundation of China(41672166 ; 41130101 ; 41372188) ; National Natural Science Foundation of China(41672166 ; 41130101 ; 41372188) ; National Natural Science Foundation of China(41672166 ; 41130101 ; 41372188) ; National Natural Science Foundation of China(41672166 ; 41130101 ; 41372188)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/46057]
专题	地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者	Fan, Jiawei; Xiao, Jule
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China 3.Paleo Labo Co Ltd, Saitama 3350016, Japan
推荐引用方式 GB/T 7714	Fan, Jiawei,Xiao, Jule,Wen, Ruilin,et al. Organic geochemical investigations of the Dali Lake sediments in northern China: Implications for environment and climate changes of the last deglaciation in the East Asian summer monsoon margin[J]. JOURNAL OF ASIAN EARTH SCIENCES,2017,140:135-146.
APA	Fan, Jiawei.,Xiao, Jule.,Wen, Ruilin.,Zhang, Shengrui.,Wang, Xu.,...&Yamagata, Hideki.(2017).Organic geochemical investigations of the Dali Lake sediments in northern China: Implications for environment and climate changes of the last deglaciation in the East Asian summer monsoon margin.JOURNAL OF ASIAN EARTH SCIENCES,140,135-146.
MLA	Fan, Jiawei,et al."Organic geochemical investigations of the Dali Lake sediments in northern China: Implications for environment and climate changes of the last deglaciation in the East Asian summer monsoon margin".JOURNAL OF ASIAN EARTH SCIENCES 140(2017):135-146.