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词汇 Firn field
分类 英语词汇 英语翻译词典
释义

Firn field

英语百科

Firn

Sampling the surface of a glacier.  There is increasingly denser firn between surface snow and blue glacier ice.
Firn field on the top of Säuleck, Hohe Tauern

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. It is ice that is at an intermediate stage between snow and glacial ice. Firn has the appearance of wet sugar, but has a hardness that makes it extremely resistant to shovelling. Its density generally ranges from 550 kg/m³-830 kg/m³, and it can often be found underneath the snow that accumulates at the head of a glacier.

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