Refers to a large area of floating sea ice formed from many pieces of ice pressed together. Technical term used in oceanography and meteorology.
In the Arctic Ocean, vast pack ice forms in winter.
The movement of pack ice greatly affects ship navigation.
Mixed kanji-kana spelling; it is a variant.
Compound of 叢 (そう, 'cluster, thicket') and 氷 (ひょう, 'ice'), literally 'clustered ice'. The term is a direct translation of the English 'pack ice'.