Firn:
Firn (/fɪrn/; from Swiss German "firn" "last year's", cognate with "before") is partially compacted névé, a type of snow that has been left over from past seasons and has been recrystallized into a substance denser than névé.
en.wikipedia.org
粒雪:
粒雪（英語：Firn），在氣候較為寒冷的地區（如：高海拔或高緯度的地區），終年積雪，雪層逐漸變厚，底層的壓力也就增大，使得積雪再度結晶為冰。
zh.wikipedia.org
This article uses material from the Wikipedia articles %@, which are released under the Creative Commons Attribution-Share-Alike License 3.0.
Firn粒雪