干旱区生态环境知识资源中心(Arid): n-Alkanes as indicators of climate and vegetation variations since the last glacial period recorded in a sediment core from the northeastern South China Sea (SCS)

Arid

DOI	10.1016/j.jseaes.2018.09.018
	n-Alkanes as indicators of climate and vegetation variations since the last glacial period recorded in a sediment core from the northeastern South China Sea (SCS)
	Liu, Fang 1,3; Chang, Xiaohong 2; Liao, Zewen 1; Yang, Chupeng 2
通讯作者	Yang, Chupeng
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
ISSN	1367-9120
EISSN	1878-5786
出版年	2019
卷号	171 页码:134-143
英文摘要	Variations in n-alkanes proxies (L/H, C-31/C-27 and ACL), molecular abundances of n-alkanes and stable carbon isotopic compositions of n-alkanes (delta C-13(alk)) from the core STD235 (20 degrees 21.15'N, 118 degrees 22.56'E) have been used to trace characterize the climatic changes that occurred in the northern South China Sea (SCS) during the last glacial period. The ratio of low to high molecular-weight n-alkanes (L/H) and the concentration of n-alkanes indicated that organic matters in the sediments were derived from the mixture of both marine and terrestrial sources, but dominated by marine autochthonous input over the past 20 ka. Total n-alkanes were higher during the last glacial stage relative to the interglacial stage, implying the low sea level and the strengthened East Asian winter monsoon (EAWM) during the glacial time. The delta C-13(alk) data indicated that the terrestrial plants on the adjacent continent of the present study area were dominated by C-3 plants during the Holocene and experienced the expansion of C-4 plants during the last glacial period. This similar result can be proved by the chain length parameter of n-alkanes (C-31/C-27, ACL) and the content of the herb pollen. In addition, n-alkanes distributions and C4 vegetation proportion calculated by delta C-13 of long-chain n-alkanes in the core STD235 recorded a short arid duration paralleled by the Heinrich event 1. Thereby we deduced that the occurrence of the dry event and the variation of regional vegetation community at the adjacent lands of the northern SCS were likely under the influence of the climate change emanated from the boreal high-latitudes.
英文关键词	n-Alkanes proxies Paleovegetation Paleoclimate Northern South China Sea
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000460709300011
WOS关键词	MOLECULAR-ISOTOPIC STRATIGRAPHY ; EAST-ASIAN MONSOON ; ORGANIC GEOCHEMISTRY ; COMMUNITY STRUCTURE ; BIOMARKER EVIDENCE ; SURFACE SEDIMENTS ; ATMOSPHERIC CO2 ; LAKE-SEDIMENTS ; CARBON-DIOXIDE ; DEEP-SEA
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216801
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, 511 Kehua St, Guangzhou 510640, Guangdong, Peoples R China; 2.Minist Nat Resources Peoples Republ China, China Geol Survey, Key Lab Marine Mineral Resources, Guangzhou Marine Geol Survey, 188 Guanghai Rd, Guangzhou 510760, Guangdong, Peoples R China; 3.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Fang,Chang, Xiaohong,Liao, Zewen,et al. n-Alkanes as indicators of climate and vegetation variations since the last glacial period recorded in a sediment core from the northeastern South China Sea (SCS)[J],2019,171:134-143.
APA	Liu, Fang,Chang, Xiaohong,Liao, Zewen,&Yang, Chupeng.(2019).n-Alkanes as indicators of climate and vegetation variations since the last glacial period recorded in a sediment core from the northeastern South China Sea (SCS).JOURNAL OF ASIAN EARTH SCIENCES,171,134-143.
MLA	Liu, Fang,et al."n-Alkanes as indicators of climate and vegetation variations since the last glacial period recorded in a sediment core from the northeastern South China Sea (SCS)".JOURNAL OF ASIAN EARTH SCIENCES 171(2019):134-143.