Water sky
Water sky refers to dark streaks (dark appearance) on the underside of low clouds, indicating the presence of open water in the vicinity of sea ice (underneath the clouds). Sunlight reflects from the surface of sea and ice. Dull neutral-colored sky near the horizon is caused by the reflection of the darker color of the sea. It is a helpful indication when working in sea ice or near the polar ice cap, as it can assist travellers in navigating in polar areas.
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