气候变化领域集成服务门户(CCPortal): How do precipitation events modify the stable isotope ratios in leaf water at Lhasa on the southern Tibetan Plateau?

CCPortal

DOI	10.1080/10256016.2022.2062343
	How do precipitation events modify the stable isotope ratios in leaf water at Lhasa on the southern Tibetan Plateau?
	Wang, Yong; Yu, Wusheng; Luo, Lun; Li, Minghui; Liu, Xiaoming; Guo, Rong; Ma, Yaoming; Xu, Baiqing; Wu, Guangjan; Zhao, Chengyi; Jing, Zhaowei; Wei, Feili; Cui, Jiangpeng; Zhang, Jingyi; Qu, Dongmei
通讯作者	Yu, WS (通讯作者)
发表日期	2022
ISSN	1025-6016
EISSN	1477-2639
起始页码	229
结束页码	246
卷号	58 期号:3
英文摘要	Serving as a medium between source water and cellulose, leaf water contributes to the isotope ratios (delta O-18, delta H-2) of plant organic matter, which can be used for paleoclimate reconstruction. This study is the first to examine the diurnal variations in the delta O-18 and delta H-2 of leaf water on the southern Tibetan Plateau. The delta O-18 and delta H-2 of leaf water were relatively low when precipitation events occurred. In particular, O-18 and H-2 of leaf water became extremely depleted 5 h after the precipitation event. Our findings demonstrate that precipitation can modify the isotope ratios of leaf water from external and internal causes. First, precipitation events affect meteorological elements, lead to decreases in leaf transpiration, and immediately weaken the isotope enrichment of leaf water ('rapid effect' of precipitation). Second, precipitation events affect the internal plant-soil water cycle process, causing the plant to preferentially use deeper soil water, and the corresponding isotope ratios of leaf water exhibit extremely low values 5 h after precipitation events ('delay effect' of precipitation). This study suggests that researchers need to be cautious in separating the signals of precipitation and hydrological processes when interpreting isotope records preserved in tree-ring cellulose archives from the Tibetan Plateau.
关键词	NON-STEADY-STATE DELTA-O-18 ENRICHMENT CELLULOSE DELTA-O-18 OXYGEN ISOTOPES O-18 ENRICHMENT HYDROGEN PLANT SOIL VAPOR ISOTOPOLOGUES
英文关键词	Hydrogen-2; isotope ecology; isotope ratio; Lhasa; leaf water; oxygen-18; precipitation events; soil water; southern Tibetan Plateau
语种	英语
WOS研究方向	Chemistry ; Environmental Sciences & Ecology
WOS类目	Chemistry, Inorganic & Nuclear ; Environmental Sciences
WOS记录号	WOS:000790210700001
来源期刊	ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES
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/260706
推荐引用方式 GB/T 7714	Wang, Yong,Yu, Wusheng,Luo, Lun,et al. How do precipitation events modify the stable isotope ratios in leaf water at Lhasa on the southern Tibetan Plateau?[J]. 中国科学院青藏高原研究所,2022,58(3).
APA	Wang, Yong.,Yu, Wusheng.,Luo, Lun.,Li, Minghui.,Liu, Xiaoming.,...&Qu, Dongmei.(2022).How do precipitation events modify the stable isotope ratios in leaf water at Lhasa on the southern Tibetan Plateau?.ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES,58(3).
MLA	Wang, Yong,et al."How do precipitation events modify the stable isotope ratios in leaf water at Lhasa on the southern Tibetan Plateau?".ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES 58.3(2022).