气候变化领域集成服务门户(CCPortal): Climatic significance of n-alkanes and their compound-specific delta D values from lake surface sediments on the Southwestern Tibetan Plateau

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DOI	10.1007/s11434-014-0227-4
	Climatic significance of n-alkanes and their compound-specific delta D values from lake surface sediments on the Southwestern Tibetan Plateau
	Hu, Xing; Zhu, Liping; Wang, Yong; Wang, Junbo; Peng, Ping; Ma, Qingfeng; Hu, Jianfang; Lin, Xiao
通讯作者	Hu, X (通讯作者)
发表日期	2014
ISSN	1001-6538
EISSN	1861-9541
起始页码	3022
结束页码	3033
卷号	59 期号:24
英文摘要	The content and hydrogen isotope ratios of n-alkanes extracted from recent lake surface sediments sampled from nine lakes in three different climate zones on the Southwestern Tibetan Plateau were analyzed. Values were compared with n-alkanes in plants from lake drainages, and delta D values of meteoric water, lake water, and mean annual precipitation. The results showed that n-C-23 was predominantly derived from aquatic plants, and n-C-27-n-C-33 from terrestrial higher plants. The average carbon chain length of n-C-27-n-C-33 (ACL(27-33)) was positively correlated with the mean annual precipitation. delta D values of the long-chain n-alkanes n-C-29 and n-C-31 of terrestrial origin (varying between -214 aEuro degrees and -169 aEuro degrees, and -226 aEuro degrees and -185 aEuro degrees, respectively) were inversely correlated with mean annual precipitation; but in accordance with the average annual variations in delta D (OIPC), delta D values of n-C-31 were strongly related to the delta D values of growing season meteoric water (R (2) = 0.74). The large difference between delta D values of n-C-23 of aquatic origin and n-C-31 (an average of about 27 aEuro degrees) demonstrates the enrichment of the lake water delta D compared to precipitation, caused by strong evaporation in the semiarid-arid areas of the southwestern Tibetan Plateau. Average value of (-95 aEuro degrees) is evidently higher than the value observed in European wet regions (-128 aEuro degrees); besides, (about -116 aEuro degrees) is constant along the study transect (SD = 9), which indicates that n-C-31 is a useful proxy for the environment.
关键词	CARBON ISOTOPIC COMPOSITION PLANT LEAF WAXES ORGANIC-MATTER D/H RATIOS NAM-CO LIPID BIOMARKERS PRECIPITATION INDICATORS AEROSOLS RECORD
英文关键词	n-Alkane; Lake sediment; Hydrogen isotope ratio; Precipitation; Tibetan Plateau
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000339104800012
来源期刊	CHINESE SCIENCE BULLETIN
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258348
推荐引用方式 GB/T 7714	Hu, Xing,Zhu, Liping,Wang, Yong,et al. Climatic significance of n-alkanes and their compound-specific delta D values from lake surface sediments on the Southwestern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2014,59(24).
APA	Hu, Xing.,Zhu, Liping.,Wang, Yong.,Wang, Junbo.,Peng, Ping.,...&Lin, Xiao.(2014).Climatic significance of n-alkanes and their compound-specific delta D values from lake surface sediments on the Southwestern Tibetan Plateau.CHINESE SCIENCE BULLETIN,59(24).
MLA	Hu, Xing,et al."Climatic significance of n-alkanes and their compound-specific delta D values from lake surface sediments on the Southwestern Tibetan Plateau".CHINESE SCIENCE BULLETIN 59.24(2014).