We’ve known the Southern Ocean has the cleanest air in the world, but we finally know why. A newly understood cloud structure producing sporadic, yet intense, rain showers washes the air of aerosols.

This striking satellite image reveals a giant, near-perfect cloud circle that formed in the heart of the Pacific Ocean more than a decade ago. While this type of cloud is not uncommon, it is extremely ...

Clouds are important for Earth's energy balance because they interact with radiation in different ways. On one hand, low clouds reflect incoming solar radiation and thus cool Earth through a property ...

A peculiar "pet cloud" took center stage in a recent satellite photo of New Zealand. The freaky formation often appears in the same spot thanks to a nearby mountain range — and is sometimes confused ...