Skip to main content
U.S. flag

An official website of the United States government


Detailed Description

Like scratches on a marble table, airplane contrails cut across the southern California Mojave Desert. The shadows from the contrails cast dark lines across the ground. Contrails form when cold, dry air mixes with warmer aircraft exhaust. Mountains and a few dry lakebeds provide a backdrop to this scene, along with bright green spots of agriculture along the Colorado River.


Public Domain.