粒雪（firn，neve）指原始结晶形态的雪，在热力或压力作用下，经过融解再冻结而形成团粒状的雪。由雪花变成粒雪的过程叫做粒雪化作用。
打蜡会使滑板滑行更快并且在颗粒雪中给底板提供确实的保护。
Fresh wax will make it will ride faster and actually protect the base from abrasion caused by granular snow.
粒雪，万年雪：经过一个夏季的溶化期但仍未成冰川的粒状且部分沉固的雪。
Firn: granular partially consolidated snow that has passed through one summer melt season but is not yet glacial ice.
在水尚未流经缆绳前，研究团队无法确定，融化的水是会流入粒雪中，还是会聚积在钻头的周围。如果是后者，将会使凿孔因冻结而封闭。
Until water flowed through the tether, the team could not tell if the meltwater was draining into the firn or accumulating around the drill, which could freeze the borehole shut.
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