The growing season for ragweed, the main cause of allergies in the U.S., has expanded by an average of 11 days since the 1970s, an analysis shows.

A cold front swept across several western states in mid-October 2023, delivering the first significant snowfall of the season to the Rocky Mountains.

As climate change warms the planet and droughts are anticipated to become more frequent and extreme, a new study reveals how reduced water flows and rising atmospheric temperatures are set to heat our rivers - creating major challenges for aquatic life, ecosystems, and society.

Tracking climate behavior could connect the dots between major weather events and help with forecasting on a global scale.

July through October fall within the dry season in the western and northern Amazon rainforest, but a particularly acute lack of rain during this period in 2023 has pushed the region into a severe drought.

Scientists measured microplastic concentrations in the highly productive Barents Sea and suggest that ocean circulation, ice melt, tourism, inadequate waste management, shipping and fishing are all likely contributors.

Now is the time to identify the conditions that cause plants to die.

Continuing the temperature trend from this summer, September 2023 was the hottest September on record, according to scientists at NASA’s Goddard Institute for Space Studies (GISS).

Surface ice in Greenland has been melting at an increasing rate in recent decades, while the trend in Antarctica has moved in the opposite direction, according to researchers at the University of California, Irvine and Utrecht University in the Netherlands.

Antarctic fur seals that were hunted to near extinction have recovered but now face dangerous decline because of a lack of food, new research suggests.