ice blink
Sign in to savethumb|Ice Islands with ice blink, watercolour by Georg Forster, made 1773 during the [[second voyage of James Cook|alt=Painting of a ship with sails traversing a rough sea with icerbergs. A white glow, the iceblink, fills the sky.]]
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- atmospheric optical phenomenon
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- Iceblink
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thumb|Ice Islands with ice blink, watercolour by Georg Forster, made 1773 during the [[second voyage of James Cook|alt=Painting of a ship with sails traversing a rough sea with icerbergs. A white glow, the iceblink, fills the sky.]]
Iceblink is a white light seen near the horizon, especially on the underside of low clouds, resulting from reflection of light off an ice field immediately beyond. The iceblink was used by both Inuit and explorers looking for the Northwest Passage to help them navigate safely as it indicates ice beyond the horizon. Its inverse phenomenon is water sky. The iceblink can be observed in both polar regions, being observed by Inuit in the Arctic and by many expeditions to Antarctica, including both the James Ross and Terra Nova expeditions.
Excerpted from Wikipedia’s “ice blink” article, available under the CC BY-SA 4.0 licence.