As Covid-19’s initial wave crested around the world, travel restrictions and a drop in passengers led to a record number of grounded flights in 2020. The air travel reduction cleared the skies of not ...

At 8:00 am on Friday morning, a smattering of high clouds could be seen passing over Bass Strait and southern Victoria. By 8:30 am, just half an hour later, a thin line of cloud had suddenly appeared, ...

Aviation's climate impact is partly due to contrails—condensation that a plane streaks across the sky when it flies through icy and humid layers of the atmosphere. Contrails trap heat that radiates ...

Researchers have generated new maps of jet contrails over the United States before and during the COVID-19 pandemic, which show a steep reduction in the area covered by contrails in 2020. As ...