Australian fires in 2019 and 2020 injected almost 1 million metric tons of smoke into the stratosphere, causing it to warm and likely contributing to a large and persistent ozone hole.

The number of thunderstorms in Alaska may triple by later this century because of climate change, increasing the risks of widespread flash flooding, landslides, and lightning-induced wildfires.

The lockdowns and reduced societal activity related to the COVID-19 pandemic affected emissions of pollutants in ways that slightly warmed the planet for several months last year, according to new research led by NCAR.

The temperatures in the upper 2,000 meters of the ocean hit a record high in 2020, according to a new analysis by a research team that included scientists from the National Center for Atmospheric Research (NCAR). The five hottest years for the upper ocean on record have all occurred since 2015.

An advanced new computer modeling technique has enabled scientists to project the potential extent of climate change in the world’s cities.