- - It's gradually shrinking in the Arctic
- - Endangered Arctic presence
- - Frozen floating brine
- - Common polar surface
- - North Atlantic navigation worry
- - Frozen part of an ocean
- - Polar bear habitat
- - Form of brine
- - What grows in the winter
- - Gulf of Bothnia winter phenomenon
- - Masses of floating brine
- - Hazard of the Northwest Passage.
- - Nautical hazard
- - Frozen ocean water
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