The study on the precipitation isotope characteristic and effect factor for water cycle

This paper researches the hydrogen and oxygen isotope compositions in precipitation in Baotou for eight years, and the meteoric water line was given: δD=6.36δ18O-5.21, which shows that some characteristics in the meteoric water line. The impact on precipitation isotope for the temperature and precipitation amount was analysed. The result shows that the impact factors of precipitation isotope was variational in the different seasons, and the degree of influence for several isotope effects is also various. The weighted-mean δD and δ18O values of precipitation tend to be more negative in January and December.