young ice

sea ice, formed during the previous winter, slightly older than nilas

Japanese Meaning

前の冬に形成された海氷で、nilasよりも少し古い氷

The research vessel measured the thickness of the young ice to assess how quickly it was melting.

調査船は、昨冬に形成され、ニラスよりやや古い海氷の厚さを測定し、どれだけ早く融けているかを評価した。

Sense（1）

sea ice, formed during the previous winter, slightly older than nilas