A marine heatwave is a period of extreme ocean temperatures (90th percentile above normal temperatures). But scientists debate what constitutes “‘normal.” The baseline period used changes the definition.

An estimated 80 percent of Alaskans live in at-risk areas for wildfires, but those residents constitute a diverse public audience with varied information-seeking habits. New research examines how to reach that audience.

Sea ice around the continent is the smallest ever observed for this point in the winter growth season.

In the summer of 2021, wildfire haze from Arizona, California, and the Pacific Northwest shrouded the Denver region. Monsoon-driven summer thunderstorms that normally flush out stagnant air largely failed to materialize, allowing smog cooked under the summer sun in 90-degree heat to pool along the base of the foothills to the west.

Drought is one of the costliest and deadliest climate-related disasters in the United States. NOAA’s National Integrated Drought Information System and the University of Nebraska Medical Center have led the development of the first comprehensive assessment of drought and health.

Will El Niño push the planet to a new record-high temperature in 2023? Our guest blogger explains what past years tell us.

The Global Monitoring Laboratory’s quest for a reliable, cost-effective way to study Earth’s stratosphere passed a significant milestone on May 17, 2023: A remotely controlled glider, carried to an elevation of 90,000 feet by a weather balloon, returned to its launch location.

The Korea Institute of Ocean Science and Technology hosted NOAA’s Pacific Marine Environmental Laboratory on a research cruise to maintain moorings, part of the Research Moored Array for African-Asian-Australian Monsoon Analysis and Prediction (RAMA).

A new modeling study shows that the emission inventories underestimate volatile organic compound emissions from wildfires when compared to aircraft observations by a factor of 3 to 7.

A new study finds that COVID-19 lockdowns dropped carbon dioxide emissions by rough 20 percent in Salt Lake City, Utah, between March 13 and April 30, 2020.