Jumbo Content

Learn More: Clouds

"At any given moment, about two-thirds of our planet is covered by clouds." -NASA

Clouds are the key regulator of Earth's average temperature. Some clouds contribute to cooling because they reflect solar energy or shortwave radiation back to space. Other clouds contribute to warming because they trap some of the energy the Earth emits. PACE will provide estimates of cloud properties (cover, height, phase, brightness, and droplet size) that are essential for climate model assessment.

What's New
Revealing ocean features through the atmosphere and clouds [more]
Compare the flow of energy
Investigating the climate system
Create a cloud!
Estimate the contents of cloud types [more]


Clouds are formed when water vapor in the atmosphere condenses. Dependent on factors such as the temperature, they may be formed of liquid water droplets, ice crystals, or a mixture of both.

PACE Aerosol & Cloud Scientists (14-Dec-19).
Monitoring Earth's cloudiness from space is useful for many reasons. Two of the most important are for providing input to weather forecasts, and for climate monitoring purposes. Clouds reflect the Sun's visible light and can trap the Earth's emitted thermal radiation, so changing cover and properties of cloud can affect the Earth's energy balance.

PACE Aerosol & Cloud Scientists (14-Dec-19).