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DOI	10.1007/s11707-022-1084-0
	A re-evaluation of the average chain length of lacustrine sedimentary n-alkanes as a paleoproxy on the Qinghai-Tibet Plateau
	Wang, Mingda; Li, Qin; Toney, Jaime; Henderson, David; Hou, Juzhi
发表日期	2023
ISSN	2095-0195
EISSN	2095-0209
起始页码	905
结束页码	919
卷号	17 期号:4
英文摘要	Long-chain n-alkanes are one of the most common organic compounds in terrestrial plants and they are well-preserved in various geological archives. nalkanes are relatively resistant to degradation and thus they can provide high-fidelity records of past vegetation and climate changes. Nevertheless, previous studies have shown that the interpretation of n-alkane proxies, such as the average chain length (ACL), is often ambiguous since this proxy depends on more than one variable. Both vegetation and climate could exert controls on the n-alkane ACL, and hence its interpretation requires careful consideration, especially in regions like the Qinghai-Tibet Plateau (QTP) where topography, biome type and moisture source are highly variable. To further evaluate the influences of vegetation and climate on the ACL in highelevation lakes, we examined the n-alkane distributions of the surface sediments of 55 lakes across the QTP. Our results show that the ACL across a climatic gradient is significantly affected by precipitation, rather than by temperature. The positive correlation between ACL and precipitation may be because of the effect of microbial degradation during deposition. Finally, we suggest that more caution is needed in the interpretation of ACL data in different regions.
关键词	ACL average chain length n-alkanes leaf wax lake sediments Qinghai-Tibet Plateau
英文关键词	CARBON-ISOTOPIC COMPOSITION; POLYCYCLIC AROMATIC-HYDROCARBONS; CHINESE LOESS PLATEAU; LAST GLACIAL MAXIMUM; CLIMATE-CHANGE; LAKE-SEDIMENTS; HOLOCENE CLIMATE; C-4 PLANTS; DELTA-C-13 ANALYSES; BIOMARKER RECORDS
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:001113603600002
来源期刊	FRONTIERS OF EARTH SCIENCE
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/282880
作者单位	Liaoning Normal University; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; University of Glasgow
推荐引用方式 GB/T 7714	Wang, Mingda,Li, Qin,Toney, Jaime,et al. A re-evaluation of the average chain length of lacustrine sedimentary n-alkanes as a paleoproxy on the Qinghai-Tibet Plateau[J]. 中国科学院青藏高原研究所,2023,17(4).
APA	Wang, Mingda,Li, Qin,Toney, Jaime,Henderson, David,&Hou, Juzhi.(2023).A re-evaluation of the average chain length of lacustrine sedimentary n-alkanes as a paleoproxy on the Qinghai-Tibet Plateau.FRONTIERS OF EARTH SCIENCE,17(4).
MLA	Wang, Mingda,et al."A re-evaluation of the average chain length of lacustrine sedimentary n-alkanes as a paleoproxy on the Qinghai-Tibet Plateau".FRONTIERS OF EARTH SCIENCE 17.4(2023).