2021 was the fifth-hottest year on record and close to 1.2 degrees C (2.1 degrees F) warmer than the preindustrial average, according to an analysis from the European Union’s Copernicus Climate Change Service.

Arlene Fiore uses satellite data paired with ground observations to refine our understanding of ozone smog and interactions with meteorology and climate.

Rising temperatures are causing a "growing diversity" of Vibrio bacteria in the sea around the UK, new research shows.

A study led by Ohio University researchers shows that the increase of sea ice surrounding Antarctica since 1979 is a unique feature of Antarctic climate since 1905 — an observation that paints a dramatic first-ever picture for weather and climate implications on the world’s southernmost continent.

The first detailed observations of lightning's emergence inside a cloud have exposed how electric fields grow strong enough to let bolts fly.

First-responder cells launching the repair after a heart attack are so frantic about fixing the damage that they promote more inflammation than necessary, new research in mice suggests.

In December 2020, a ring of warm water nearly 60 miles wide broke away from the Gulf Stream and displaced cold-water species sustaining many of New England’s commercial fisheries.

The macroalga giant kelp, which is an iconic and important ecosystem-structuring species found off the coast of California and many other coastlines, can grow 100-feet long within 1-2 years.

Carbon dioxide (CO2) levels today are higher than at any point in the past 800,000 years or more.

The reversible reactions can absorb energy in the form of heat and subsequently conserve energy that would otherwise be lost.