In this work, samples of surface snow, surface ice, snow pit and meltwater from the Laohugou Glacier No. 12 on the northern edge of Tibetan Plateau (TP) were collected during the summer of 2015. The average concentration of Hg in surface snow/ice was 22.41 ng L⁻¹, while the percentage of dissolved mercury (Hg_D) was observed to be around 26%. An altitudinal magnification of Hg was not observed for surface snow; however, in contrast, a significant positive magnification of Hg with altitude was observed in the surface ice. A higher concentration of Hg corresponded with the dust layer of the snow pit. It was observed that about 42% of Hg was lost from the surface snow when the glacier was exposed to sunlight within the first 24 h indicating some Hg was emitted back to the atmosphere while some were percolated downwards. The result from the principal component analysis (PCA) showed that the sources of Hg in Laohugou Glacier No. 12 were from crustal and biomass burning. Finally, it was estimated that total export of Hg from the outlet river of Laohugou glacier No. 12 in the year 2015 was about 1439.46 g yr⁻¹ with yield of 22.77 μg m² yr⁻¹. This study provides valuable insights for understanding the behavior of Hg in the glacier of the northern Tibetan Plateau.

本工作于 2015 年夏季采集了青藏高原北缘老虎沟 12 号冰川的地表雪、地表冰、雪坑和融水样本。冰为 22.41 ng L ^-1，而溶解汞的百分比（Hg _D) 大约为 26%。对于地表雪，没有观察到 Hg 的海拔放大倍数；然而，相比之下，在表层冰中观察到 Hg 随高度的显着正放大。较高浓度的汞对应于雪坑的灰尘层。据观察，当冰川在最初 24 小时内暴露在阳光下时，约 42% 的汞从表面雪中流失，这表明一些汞被排放回大气，而一些则向下渗透。主成分分析(PCA)结果表明，老虎沟12号冰川的Hg主要来源于地壳和生物量燃烧。最后估算，2015年老虎沟12号冰川出口河流汞出口总量约为1439.46 g yr ^-1产量为 22.77 μg m ² yr ^-1。该研究为理解青藏高原北部冰川中汞的行为提供了宝贵的见解。