水科学与水工程2009，Vol.2Issue(2)：11-18,8.DOI:10.3882/j.issn.1674-2370.2009.02.002
Experimental study on stable isotopic fractionation of evaporating water under varying temperature
Experimental study on stable isotopic fractionation of evaporating water under varying temperature
摘要
Abstract
The variation of stable isotope ratios in natural waters provides valuable information that can be used to trace water movement. Evaporation plays a crucial role in determining the variation of stable isotopes. In this paper, several evaporation experiments were conducted in order to study the stable isotopic fractionation mechanism of water and analyze the influence of different temperatures on evaporation fractionation. Three group experiments of water evaporation under different temperatures and initial isotopic values were carried out. The results show that fractionation factors of hydrogen and oxygen may increase with temperature, and the average enrichment degree of hydrogen isotope D is 3.432 times that of oxygen isotope 18O. The results also show that the isotopic composition of the initial water has little influence on water evaporation fractionation, which is mainly affected by the state variables in the evaporation process, such as temperature. This research provides experimental data for further understanding the evaporation fractionation mechanism.关键词
water evaporation/hydrogen and oxygen isotopes/fractionation mechanism/temperature/experimental studyKey words
water evaporation/hydrogen and oxygen isotopes/fractionation mechanism/temperature/experimental study分类
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Hai-ying HU,Wei-min BAO,Tao WANG,Si-min QU..Experimental study on stable isotopic fractionation of evaporating water under varying temperature[J].水科学与水工程,2009,2(2):11-18,8.基金项目
This work was supported by the National Natural Science Foundation of China (Grant No. 50679024) and the Innovation Program for College Graduate of Jiangsu Province of 2007 (Grant No. CX07B_130Z). （Grant No. 50679024）
