Rime Ice Riverbank
Songhua River, Northeast China
Rime Ice Riverbank is an original illustration set in Songhua River, Northeast China. It lies in mid-latitudes, where the climate is monsoon-influenced hot-summer continental.
Willow trees stand with every fine twig sheathed in feathery white ice, whole crowns turned silver. Flat bands of steam rise off unfrozen water beside them. The riverbank is hard and bare, and the clear morning light is brutally cold.
Why does rime build into feathers instead of coating like frost?
Rime forms when supercooled fog droplets freeze on contact with a surface, building outward into feathers rather than coating like frost — it needs fog, wind and air well below freezing at once. The steam explains the fog: water still liquid in air that cold releases vapour that condenses instantly. Something is keeping this river from freezing.
Terpano is a free daily geography puzzle. You study one original illustration, place a pin on a borderless terrain map, and see how close you were. There is no account and no sign-up; progress stays in your own browser. It plays in 11 languages.
Part of Ice, tide, river and salt — Water leaves marks at a scale you can measure by eye.
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