Analysis of Stable Isotope Characteristics and Water Vapor Origins in Atmospheric Precipitation in the Yangtze River Basin
DONG Xiaofang
DENG Huangyue
ZHENG Xiangmin
ZHOU Limin
Abstract：Based on the data provided by the Global Network of Isotopes in Precipitation (GNIP),this paper studies spatial and temporal characteristics of δ18O regarding four cities in the Yangtze River basin including Nanjing,Wuhan,Kunming and Chengdu,where stations of GNIP were sited;besides,this paper analyzes the relation of δ18O with temperature and rainfall in different time scales.The study suggests that monthly average values of δ18O and δD fluctuated in the four cities,of which Kunming fluctuates most,while the annual average values of δ18O and δD only slightly change;seasonally,δ18O in precipitation is affected by temperature during dry season and affected by rainfall amount during wet season;and in the year scales,δ18O in precipitation is remarkably affected by rainfall amount.In comparison with the global meteoric water line,the meteoric water line in the Yangtze River basin features smaller slope and intercept,especially the intercept.The trajectory of air mass has been cluster-analyzed using the model of HYSPLIT,indicating that the four cities have different water vapor origin.
Keywords：the Yangtze River basinoxygen and hydrogen isotopewater vapor origincluster analysis
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 78-84 )