In this study,event-based precipitation samples collected from October 2012 to October 2013 in the Dunhuang Basin in Northwest China,GNIP data and HYSPLIT model have been used to constrain the stable isotopes variations and moisture sources.TheδD,δ18 O and d-excess showed distinctively seasonal variations:with more positiveδD,δ18 O and lower d-excess values in summer and more negativeδD,δ18 O and higher d-excess values in winter.The relationship between local air temperature and stable isotopes in precipita...