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Experimental study of relationship between average isotopic fractionation factor and evaporation rate

ISSN号：1001-6058
期刊名称：《水动力学研究与进展：英文版》
时间：0
分类：P618.13[天文地球—矿床学;天文地球—地质学] TU111.1[建筑科学—建筑理论]
作者机构：[1]HydroChina Chengdu Engineering Corporation, Chengdu 610072, R R. China, [2]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University Nanjing 210098, P. R. China, [3]School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, P. R. China
相关基金：This work was supported by the National Natural Science Foundation of China （Grants No. 50679024, 40901015, and 41001011）, the Fundamental Research Funds for the Central Universities （Grants No. B 1020072 and B 1020062）, the Ph.D. Programs Foundation of the Ministry of Education of China （Grant No 20090094120008）, the Special Fund of the State Key Laboratory of China （Grant No. 2009586412）, and the Science Foundation of the HydroChina Chengdu Engineering Corporation （Grant No. P058）.

作者： Tao WANG[1], Wei-min BAO[2], Hai-li XU[1], Zhen ZHU[1], Si-min QU[2], Peng SHI[2], Hai-ying HU[3], Rui-qi FAN[1], Qian LI[2]

关键词：同位素分馏, 蒸发率, 系数和, 实验, 平均, 同位素组成, 水体蒸发, 大气因素, average isotopic fractionation factor, evaporation rate, hydrogen and oxygen isotopes

中文摘要：

同位素的分别是用氢和氧同位素跟踪水周期的基础。从免费的水身体蒸发的水里的同位素的分别因素被温度和相对湿度主要影响，并且在一天的功课上与这些大气的因素显著地变化。蒸发率(E) 能揭示大气的因素的效果。因此，应该在同位素的分别因素和 E 之间有某个功能的关系。平均同位素的分别因素(*) 被定义与天的时间间隔在蒸发描述蒸汽和液体阶段之间的同位素的差别。在之间的关系 * 并且 E 没有流入通过一个蒸发平底锅实验基于同位素的集体平衡被调查。试验性的结果证明剩余水的同位素的作文是与时间充实的更多；* 坐飞机被影响温度，相对湿度，和另外的大气的因素，并且与 E 有一种强壮的功能的关系。值 * 能容易与 E，在平底锅的水的起始的卷，和剩余水的同位素的作文的已知的值被计算。

英文摘要：

Isotopic fractionation is the basis of tracing the water cycle using hydrogen and oxygen isotopes. Isotopic fractionation factors in water evaporating from free water bodies are mainly affected by temperature and relative humidity, and vary significantly with these atmospheric factors over the course of a day. The evaporation rate （E） can reveal the effects of atmospheric factors. Therefore, there should be a certain functional relationship between isotopic fractionation factors and E. An average isotopic fractionation factor （ t~＊） was defined to describe isotopic differences between vapor and liquid phases in evaporation with time intervals of days. The relationship between or＊ and E based on the isotopic mass balance was investigated through an evaporation pan experiment with no inflow. The experimental results showed that the isotopic compositions of residual water were more enriched with time; tr＊ was affected by air temperature, relative humidity, and other atmospheric factors, and had a strong functional relation with E. The values of 0~＊ can be easily calculated with the known values of E, the initial volume of water in the pan, and isotopic compositions of residual water.

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