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.
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.
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