Determining the Isotopic Composition of Surface Water Vapor Flux From High-Frequency Observations Using Flux-Gradient and Keeling Plot Methods

doi:10.1029/2020EA001304

	Determining the Isotopic Composition of Surface Water Vapor Flux From High-Frequency Observations Using Flux-Gradient and Keeling Plot Methods
	Hu, Yongbo 1; Xiao, Wei 1; Wei, Zhongwang 2,3; Welp, Lisa R.4; Wen, Xuefa 5; Lee, Xuhui 6
刊名	EARTH AND SPACE SCIENCE
	2021-03-01
卷号	8 期号:3 页码:15
DOI	10.1029/2020EA001304
通讯作者	Xiao, Wei(xuhui.lee@yale.edu) ; Lee, Xuhui(xuhui.lee@yale.edu)
英文摘要	The isotopic composition of surface water vapor flux (delta(E)) is a quantity frequently used to investigate the local and regional water cycle. This study reports the results of a comparative evaluation of delta(E) determined with the Keeling plot and the flux-gradient methods using high-frequency data collected at a cropland site and a lake site. Three regression models, ordinary least squares (OLS), York's solution (YS), and geometric mean regression, were tested with the Keeling plot method. Results show that concentration-dependent field characterization of measurement errors can improve the estimation of the YS regression. For both sites, broad agreement was achieved among the Keeling plot method with YS regression, the Keeling plot method with OLS regression and the flux-gradient method. For the lake site, OLS was the least biased of the three regression models in reference to the delta(E) calculated by the Craig-Gordon (CG) model of isotopic evaporation of open water. Good agreement was aslo achieved between the flux-gradient method and the CG model at the lake site under open-fetch conditions. A footprint analysis suggests that the Keeling method with OLS regression may be less sensitive to fetch than the flux-gradient method.
资助项目	National Key R&D Program of China[2019YFA0607202] ; China Scholarship Council ; National Natural Science Foundation of China[41975143] ; US National Science Foundation[1520684]
WOS研究方向	Astronomy & Astrophysics ; Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000635218300015
资助机构	National Key R&D Program of China ; China Scholarship Council ; National Natural Science Foundation of China ; US National Science Foundation
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/161886]
专题	中国科学院地理科学与资源研究所
通讯作者	Xiao, Wei; Lee, Xuhui
作者单位	1.Nanjing Univ Informat Sci & Technol, Yale NUIST Ctr Atmospher Environm, Int Joint Lab Climate & Environm Change ILCEC, Nanjing, Peoples R China 2.Sun Yat Sen Univ, Sch Atmospher Sci, Guangdong Prov Key Lab Climate Change & Nat Disas, Guangzhou, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China 4.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 6.Yale Univ, Sch Environm, New Haven, CT 06520 USA
推荐引用方式 GB/T 7714	Hu, Yongbo,Xiao, Wei,Wei, Zhongwang,et al. Determining the Isotopic Composition of Surface Water Vapor Flux From High-Frequency Observations Using Flux-Gradient and Keeling Plot Methods[J]. EARTH AND SPACE SCIENCE,2021,8(3):15.
APA	Hu, Yongbo,Xiao, Wei,Wei, Zhongwang,Welp, Lisa R.,Wen, Xuefa,&Lee, Xuhui.(2021).Determining the Isotopic Composition of Surface Water Vapor Flux From High-Frequency Observations Using Flux-Gradient and Keeling Plot Methods.EARTH AND SPACE SCIENCE,8(3),15.
MLA	Hu, Yongbo,et al."Determining the Isotopic Composition of Surface Water Vapor Flux From High-Frequency Observations Using Flux-Gradient and Keeling Plot Methods".EARTH AND SPACE SCIENCE 8.3(2021):15.