一いち年ねん氷ごおり

noun

first-year ice

Technical term in glaciology and oceanography for sea ice that has not survived a summer melt season; typically 30 cm to 2 m thick.

• 北ほっ極きょく海かいでは、一いち年ねん氷ごおりが広ひろい範はん囲いを覆おおっている。

  In the Arctic Ocean, first-year ice covers a wide area.