Stable isotopes are useful for obtaining hydroclimatic and past environmental information. The record of stable isotopes in snow not only reflects the deposition condition but also provides information on post-depositional processes, which benefits ice core studies. In this study, delta O-18 and delta D in new snow, surface snow and snowpack were measured to analyze deposited and post-depositional processes on a temperate glacier at the southeast margin of the Tibetan plateau. The results indicated that new snow and surface snow were relatively depleted in heavy isotopes during the post-monsoon period and enriched in heavy isotopes during the westerly and pre-monsoon period. Surface snow was enriched in O-18 and D relative to new snow sampled during the same period. Isotopic homogenization was observed in May and June snowpack, illustrating the effect of melting on isotopes. The relatively low slope (< 8) for the delta D-delta O-18 line during the post-monsoon period and high slope (> 8) during the westerly and pre-monsoon periods corresponded to temperature change. Although the vertical isotopic composition of snowpack sampled in April recorded the deposited information of winter precipitation, the post-depositional processes could have altered the isotopic composition of snow. During the accumulation period, wind drift was an crucial factor leading to abrupt isotopic modification in snow, which was verified using the energy-balance model and wind regime. During the ablation period, the decreasing trend of the slope and the gradual enrichment of O-18 and D in the leaving snow mainly resulted from the isotopic exchange between liquid and solid water. The study enhanced our understanding of the controlling post-depositional processes on temperate glaciers.

来源平台：JOURNAL OF HYDROLOGY