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Arctic Methane Claims Questioned

A scientific controversy erupted this week over claims that methane trapped beneath the Arctic Ocean could suddenly escape, releasing huge quantities of methane, a greenhouse gas, in coming decades, with a huge cost to the global economy. Full story

Global Price Tag for Arctic Thawing: $60 Trillion

The beautiful, stark scenery of the Arctic may be priceless, but the warming of the region could come at a great cost to the world. Full story

Deep Arctic Waters Still Flowed During Last Ice Age

Even during the deep freeze of the last ice age, the waters of the deep Arctic Ocean churned below the frozen ice cap, new research finds. Full story

Arctic Sea Ice Melt Disrupts Weather Patterns

Shrinking Arctic sea ice is shifting polar weather patterns, especially in fall and winter, a new climate modeling study finds. Full story

Sea Ice Loss Could Alter Arctic Air Chemistry

Over the past 30 years, the Arctic has warmed more than any other place on the planet, and that warming and the resulting melt of the region's sea ice presents a number of potential adverse effects, from impacts on weather systems to the decline in the habitats of native species. Full story

North Pole Marathon may be world's coolest

   Competitors suited up to run the North Pole Marathon over the frozen Arctic Sea in temperatures of 18 below. NBCNews.com's Dara Brown reports.

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Articles

Arctic Sea Ice Hits Yearly Max, But Still Dwindling

Arctic Storm Shatters Thin Sea Ice

The 'New Arctic': Thinning Ice Is Changing Ecosystem

Cyclone is absolved in record sea ice melt

Why Arctic Sea Ice Melts So Quickly

Seafloor observatory monitors Arctic Ocean

Record Arctic Storm Melted Sea Ice

Path of huge 'Big Freeze' flood located

Scientists chuck instruments into Arctic sea ice

When Will Arctic Ice Completely Disappear?

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An officer of the "Mikhail Lermontov" passenger ship points at an echo-sounder on the Yenisei river, about 100 km north of Russia's Siberian city of Krasnoyarsk, June 12, 2013. Yenisei, one of the largest river systems in the world which rises in Mongolia and flows into the Arctic ocean, is the li

An officer of a passenger ship stands at the wheel of the ship on the Yenisei river
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An employee of a storage for old vessels deemed non-operational makes his daily tour on the bank of the Yenisei river in Krasnoyarsk
An employee of a storage for old vessels deemed non-operational makes his daily tour on the bank of the Yenisei river in Krasnoyarsk

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A man sits near a ship stationed on the bank of the Yenisei river in Krasnoyarsk
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A man sits near a ship stationed on the bank of the Yenisei river in Russia's Siberian city of Krasnoyarsk June 12, 2013. Yenisei, one of the largest river systems in the world which rises in Mongolia and flows into the Arctic ocean, is the life artery for the residents populating its banks. Picture

A woman sunbathes on a wild natural island in the middle of the Angara River, a confluent of the Yenisei river
A woman sunbathes on a wild natural island in the middle of the Angara River, a confluent of the Yenisei river

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The "Victor Astafiev" bulk-oil vessel is lifted inside the floating dock of a ship-repair centre on the Yenisei River for repairs in Russia's Siberian city of Krasnoyarsk June 24, 2013. Yenisei, one of the largest river systems in the world which rises in Mongolia and flows into the Arctic ocean, is