Polar stratospheric clouds (PSCs) form in the extreme cold of the polar winter stratosphere and comprise supercooled liquid droplets and crystalline phases such as nitric acid trihydrate and ice.

This year’s ozone hole over Antarctica ranked among the smallest since the early 1990s, reflecting steady progress from decades of global action under the Montreal Protocol. Declining chlorine levels ...

Earth's ozone layer holes over polar regions, where the stratospheric ozone level is significantly depleted, have been a prevalent feature of climate change news in recent decades.

The story of the ozone layer and its infamous hole is a roadmap for all of us. It offers a pathway for solving complex environmental challenges steeped in science, economics policy, skeptical ...

Ozone levels above the Arctic reached a record low for March, NASA researchers report. An analysis of satellite observations show that ozone levels reached their lowest point on March 12 at 205 Dobson ...

The tropical Pacific Ocean and the frozen expanse of Antarctica sit more than 10,000 kilometers apart. Yet new research shows that when surface waters warm near the equator in northern winter, the ...

Explore how marine cloud brightening, stratospheric aerosol injection, and enhanced weathering work as solar geoengineering methods and carbon dioxide removal techniques to help manage climate risks.