干旱区生态环境知识资源中心(Arid): Trend reversal of soil n-alkane Carbon Preference Index (CPI) along the precipitation gradient and its paleoclimatic implication

Arid

DOI	10.1016/j.chemgeo.2021.120402
	Trend reversal of soil n-alkane Carbon Preference Index (CPI) along the precipitation gradient and its paleoclimatic implication
	Yan, Yan; Zhao, Bingyan; Xie, Luhua; Zhu, Zhaoyu
通讯作者	Yan, Y (corresponding author), 511 Kehua St, Guangzhou 510640, Peoples R China.
来源期刊	CHEMICAL GEOLOGY
ISSN	0009-2541
EISSN	1872-6836
出版年	2021
卷号	581
英文摘要	Homologue distribution proxies of leaf wax n-alkanes (normal chain alkanes) have been widely used for chemotaxonomy and paleoclimate reconstruction, while modern calibrations of them reported contrasting conclusions in different climate settings, especially between the cold arid and other climate regions. To further explore n-alkane-abiotic factor correlation in cold arid regions, this study surveyed n-alkane patterns of soil and leaf wax of three plant species along confined temperature and precipitation gradients in the Junggar Basin of northwest China. Our results show that salinity has a possible strong constraint on the Average Chain Length (ACL) of soil n-alkanes in high salinity settings, while precipitation or water stress is the leading constraint on the Carbon Preference Index (CPI) of those in low salinity settings. Precipitation also shows strong control over CPI or ACL of leaf wax n-alkanes of different plant species. Our results confirmed that n-alkane patterns are sensitive to, and constrained by abiotic factors independently on levels of plant species and averaged biome. A compilation of soil CPI from transect studies across the hot-humid to cold-arid regions of China further revealed precipitation being the first-order constraint of soil CPI, and a CPI trend reversal pattern along the precipitation gradient, where CPI increases from arid to semiarid climate and then decreases toward humid climate. Further analysis of existing CPI records showed that this CPI trend reversal may help differentiate three climate states qualitatively, i.e. arid, semiarid-semihumid and humid climates, which could be a valuable complement to existing proxies for paleoclimate reconstruction.
英文关键词	n-alkane CPI Precipitation gradient Paleoclimate reconstruction
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000702306700017
WOS关键词	ORGANIC GEOCHEMISTRY ; ISOTOPIC COMPOSITION ; FATTY-ACIDS ; DISTRIBUTIONS ; HYDROCARBONS ; INDICATORS ; CLIMATE ; VALUES ; PLANTS ; BIOMARKERS
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362842
作者单位	[Yan, Yan; Xie, Luhua; Zhu, Zhaoyu] Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510640, Peoples R China; [Yan, Yan; Xie, Luhua; Zhu, Zhaoyu] CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China; [Yan, Yan] Woods Hole Oceanog Inst, Geol & Geophys Dept, Woods Hole, MA 02543 USA; [Zhao, Bingyan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Zhao, Bingyan] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Yan, Yan,Zhao, Bingyan,Xie, Luhua,et al. Trend reversal of soil n-alkane Carbon Preference Index (CPI) along the precipitation gradient and its paleoclimatic implication[J],2021,581.
APA	Yan, Yan,Zhao, Bingyan,Xie, Luhua,&Zhu, Zhaoyu.(2021).Trend reversal of soil n-alkane Carbon Preference Index (CPI) along the precipitation gradient and its paleoclimatic implication.CHEMICAL GEOLOGY,581.
MLA	Yan, Yan,et al."Trend reversal of soil n-alkane Carbon Preference Index (CPI) along the precipitation gradient and its paleoclimatic implication".CHEMICAL GEOLOGY 581(2021).