firn line


Also found in: Encyclopedia, Wikipedia.
Related to firn line: névé, firn snow

firn line

n
1. (Geological Science) Also called: firn limit the zone of a glacier between the lower region of solid ice and the upper region of névé, above which ablation occurs
2. (Geological Science) the snow line on a glacier
References in periodicals archive ?
These are the penultimate and ultimate of Harris's ten definitions, building on Fowler's six (1979), but they could both be folded into the glacier metaphor: atop a glacier's core are layers of new snow and "old snow" or "firn," which are year-old granules on their way to becoming solid ice; in glaciology, the meeting point of the zones of new accumulation and "ablation" (loss by melting, etc.) is called the "firn line." The other canon subdefinitions of Harris and Fowler could also be subsumed into the glaciological scheme: the pedagogical canon is like the useful stream of glacial meltwater; the critical canon involves glacial fieldwork; the popular canon is like glacial tourism.