English Dictionary

snow line

noun

The altitude, in a mountainous region, above which the ground is covered with snow, at any particular time.

The snow line is the altitude at which snow remains on the ground throughout the year.

意味（1）

The altitude, in a mountainous region, above which the ground is covered with snow, at any particular time.

Coordinate term: tree line

意味（2）

(astrophysics) The inner limit where volatile molecules can remain frozen in the zone around a star.

Chris Ormel, an astronomer at the University of Amsterdam, and his colleagues recently calculated that protoplanets began to form at the snow line around the star, then grew quickly by accreting pebbles.

意味（3）

(astrophysics, specifically) The limit for water remaining solid instead of evaporating away under solar radiation.