Give the upper atmosphere dust, and it will make cirrus clouds. It has long been a mystery exactly what causes the formation of cirrus clouds, the wispy billows of ice that can be seen high in the ...

If we ever get desperate enough to try artificially cooling the planet to slow global warming, we might want to think about modifying cirrus clouds. Thinning out these feathery, high-altitude ...

However, these clouds had fewer ice crystals than typical cirrus clouds observed under normal conditions. The ice crystals that were present were notably larger than usual.

Wispy, featherlike clouds off the coast of Chile appear to cover the Pacific Ocean in white fur in a newly released satellite photo. The natural-color image, taken May 21 by NASA's Aqua satellite ...