Xiao Wei1; Qian Yufei1; Lee Xuhui2; Wang Wei1; Zhang Mi1; Wen Xuefa3; Liu Shoudong1; Hu Yongbo1; Xie Chengyu1; Zhang Zhen1; Zhang Xuesong1; Zhao Xiaoyan1; Zhang Fucun1
Source Publicationsciencechinaearthsciences
AbstractThe kinetic fractionation of open-water evaporation against the stable water isotope H-2 O-18 is an important mechanism underlying many hydrologic studies that use O-18 as an isotopic tracer. A recent in-situ measurement of the isotopic water vapor flux over a lake indicates that the kinetic effect is much weaker (kinetic factor 6.2%) than assumed previously (kinetic factor 14.2%) by lake isotopic budget studies. This study investigates the implications of the weak kinetic effect for studies of deuterium excess-humidity relationships, regional moisture recycling, and global evapotranspiration partitioning. The results indicate that the low kinetic factor is consistent with the deuterium excess-humidity relationships observed over open oceans. The moisture recycling rate in the Great Lakes region derived from the isotopic tracer method with the low kinetic factor is a much better agreement with those from atmospheric modeling studies than if the default kinetic factor of 14.2%o is used. The ratio of transpiration to evapotranspiration at global scale decreases from 84 +/- 9% (with the default kinetic factor) to 76 +/- 19% (with the low kinetic factor), the latter of which is in slightly better agreement with other non-isotopic partitioning results.
Funding Project[National Natural Science Foundation of China] ; [National Key Research and Development Program of China] ; [U. S. National Science Foundation] ; [Science and Technology Department of Ningxia] ; [China Special Fund for Meteorological Research in the Public Interest] ; [NUIST Scientific Foundation] ; [Priority Academic Program Development of Jiangsu Higher Education Institutions] ; [Ministry of Education of the People's Republic of China]
Document Type期刊论文
Recommended Citation
GB/T 7714
Xiao Wei,Qian Yufei,Lee Xuhui,et al. hydrologicimplicationsoftheisotopickineticfractionationofopenwaterevaporation[J]. sciencechinaearthsciences,2018,61(10):1523.
APA Xiao Wei.,Qian Yufei.,Lee Xuhui.,Wang Wei.,Zhang Mi.,...&Zhang Fucun.(2018).hydrologicimplicationsoftheisotopickineticfractionationofopenwaterevaporation.sciencechinaearthsciences,61(10),1523.
MLA Xiao Wei,et al."hydrologicimplicationsoftheisotopickineticfractionationofopenwaterevaporation".sciencechinaearthsciences 61.10(2018):1523.
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