The relationship of delta D and delta O-18 in surface soil water and its implications for soil evaporation along grass transects of Tibet, Loess, and Inner Mongolia Plateau

doi:10.1016/j.jhydrol.2021.126533

	The relationship of delta D and delta O-18 in surface soil water and its implications for soil evaporation along grass transects of Tibet, Loess, and Inner Mongolia Plateau
	Lyu, Sidan 1; Wang, Jing 1,2; Song, Xianwei 1,3; Wen, Xuefa 1,3,4
刊名	JOURNAL OF HYDROLOGY
	2021-09-01
卷号	600 页码:12
关键词	Soil evaporation Stable isotope Soil water evaporation line Lc-excess Grass transect
ISSN号	0022-1694
DOI	10.1016/j.jhydrol.2021.126533
通讯作者	Wang, Jing(wangjing.15b@igsnrr.ac.cn) ; Wen, Xuefa(wenxf@igsnrr.ac.cn)
英文摘要	Soil evaporation plays an important role in non-productive water loss and local climate regulation. The deviation of the relationship between delta D and delta O-18 in surface soil water from that in precipitation is used to indicate the integrative results of the soil evaporation process, but the distinction between the slope of the soil water evaporation line (SEL) and line-conditioned excess (lc-excess) as individual indicators has not been identified. Furthermore, spatial variability and interaction effects of climate, soil, and vegetation on soil evaporation in arid and semi-arid grasslands remain poorly understood. We established 3 west-to-east sampling transects along with increasing precipitation and decreasing aridity index gradients in grasslands of the Tibetan (TP, 1500 km), Loess (LP, 600 km), and Inner Mongolia (MP, 1200 km) Plateaus. Slope of SEL and weighted mean lc-excess were calculated according to the delta D and delta O-18 in soil water, which was extracted from soils collected at 10 cm intervals to a depth of 1 m along with soil profiles during the vigorous growing season. We found that lc-excess appeared relatively more robust than slope in representing soil evaporation process because lc-excess was determined by evaporation fractionation factors and soil residual water storage, while slope was regulated only by evaporation fractionation factors. Soil evaporation, as indicated by lc-excess, exhibited decreasing trends from west to east, and was controlled by relative humidity in TP, and by vegetation coverage in LP and MP. Our results highlighted that the soil evaporation process may be more sensitive to climate change in TP, and vegetation restoration in LP and MP.
资助项目	National Natural Science Foundation of China[41991234] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23070202] ; National Key R&D Program of China[2017YFA0604803] ; Key Laboratory of Groundwater Sciences and Engineering, Ministry of Natural Resources[SK20210201]
WOS关键词	STABLE-ISOTOPES ; CLIMATE-CHANGE ; ALPINE MEADOW ; DEW FORMATION ; GROUNDWATER ; PLANT ; DYNAMICS ; HYDROGEN ; SEASONALITY ; ECOSYSTEM
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000685246900039
资助机构	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Key R&D Program of China ; Key Laboratory of Groundwater Sciences and Engineering, Ministry of Natural Resources
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/165267]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Jing; Wen, Xuefa
作者单位	1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Minist Nat Resources, Key Lab Groundwater Sci & Engn, Shijiazhuang 050000, Hebei, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China 4.Univ Chinese Acad Sci, Yanshan Earth Crit Zone & Surface Fluxes Res Stn, Beijing 101408, Peoples R China
推荐引用方式 GB/T 7714	Lyu, Sidan,Wang, Jing,Song, Xianwei,et al. The relationship of delta D and delta O-18 in surface soil water and its implications for soil evaporation along grass transects of Tibet, Loess, and Inner Mongolia Plateau[J]. JOURNAL OF HYDROLOGY,2021,600:12.
APA	Lyu, Sidan,Wang, Jing,Song, Xianwei,&Wen, Xuefa.(2021).The relationship of delta D and delta O-18 in surface soil water and its implications for soil evaporation along grass transects of Tibet, Loess, and Inner Mongolia Plateau.JOURNAL OF HYDROLOGY,600,12.
MLA	Lyu, Sidan,et al."The relationship of delta D and delta O-18 in surface soil water and its implications for soil evaporation along grass transects of Tibet, Loess, and Inner Mongolia Plateau".JOURNAL OF HYDROLOGY 600(2021):12.