Chemical reactions in the Arctic atmosphere are accelerating warming and reshaping climate far beyond the polar region.

WASHINGTON—The icy region at the top of the globe, lashed by wildfire and pelted with increasingly heavy precipitation, has tipped into “uncharted territory,” scientists reported Tuesday. The Arctic ...

Arctic tundra, which has stored carbon for thousands of years, has now become a source of planet-warming pollution. As wildfires increase and hotter temperatures melt long-frozen ground, the region is ...

Climate change looms large over virtually every population, every geographic region and every industry. Yet children and their caregivers are some of ...

Foreboding environmental milestones abounded again this year in the Arctic, where experts say dramatic climate shifts are fundamentally altering the ecosystem and how it operates. One recent turning ...

NOAA scientists have documented profound change in the frozen north as U.S. government science itself faces an uncertain future. Arctic cotton grass grows in marshy terrain near the Ilulissat Icefjord ...

As climate change drives earlier spring conditions in the Arctic, bird species that travel there to breed there are under pressure to migrate faster. A new study led by researchers from the University ...

Tundra plants can eek out an existence in the very short summers of the Canadian High Arctic such as here on Ellesmere Island, Nunavut. (Anne Bjorkman, University of Gothenburg) Rapid climate change ...

A new study has shed unprecedented light on the highly variable and climate-sensitive routes that substances from Siberian rivers use to travel across the Arctic Ocean. The findings raise fresh ...

In 1957, Hollywood released The Deadly Mantis, a B-grade monster movie starring a praying mantis of nightmare proportions. Its premise: Melting Arctic ice has released a very hungry, million-year-old ...

Deep beneath the Arctic permafrost and ocean sediments, a massive reservoir of methane, often referred to as a “time bomb,” poses a significant threat to our climate. This potential for rapid release ...