Experimental study on stable isotopic fractionation of evaporating water under varying temperature

Autor: Hai-ying Hu, Wei-min Bao, Tao Wang, Si-min Qu
Jazyk: angličtina
Rok vydání: 2009
Předmět:
Zdroj: Water Science and Engineering, Vol 2, Iss 2, Pp 11-18 (2009)
Druh dokumentu: article
ISSN: 1674-2370
DOI: 10.3882/j.issn.1674-2370.2009.02.002
Popis: 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 . 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. 18O
Databáze: Directory of Open Access Journals