Nitrate in snow is subject to post-depositional processing, which leads to a net loss and redistribution within the snowpack. The relative importance of post-depositional loss processes such as the volatilization of nitric acid (HNO₃) and photolysis of nitrate has long been debated. Changes in nitrate and chloride concentrations in the snowpack were investigated at H128 (69°23.584’S, 41°33.712’E), an Antarctic coastal site approximately 100 km from Syowa Station in East Antarctica from December 2015 to February 2016. Results indicate that chloride migrated to deeper sites within the snowpack under the influence of water vapour movement. Moreover, 50% of the nitrate on surface snow was lost to photolysis, and approximately 20% of the nitrate was absent at a depth of 40 cm. To enhance our knowledge of the Antarctic geochemical cycle, this study is the first to suggest chloride ion movement in snowpacks or significant nitrate loss for any Antarctic coastal site.

雪中​​的硝酸盐需要进行沉积后处理，这会导致雪堆中的净损失和重新分布。沉积后损失过程（例如硝酸（HNO _3）的挥发）的相对重要性）和硝酸盐的光解作用一直存在争议。2015年12月至2016年2月，在距离南极东部Syowa站约100 km的南极沿海站点H128（69°23.584'S​​，41°33.712'E）处调查了雪堆中硝酸盐和氯化物浓度的变化。结果表明，在水蒸气运动的影响下，氯化物迁移到积雪内部的更深处。此外，表雪上的硝酸盐有50％被光解损失，而在40厘米深度处约不到20％的硝酸盐。为了增强我们对南极地球化学循环的了解，这项研究是第一个提出在积雪中氯离子运动或任何南极沿海站点大量硝酸盐损失的研究。