Researchers find 3-million-year-old landscape beneath Greenland ice sheet

Glaciers and ice sheets are commonly thought to work like a belt sander. As they move over the land they scrape off everything — vegetation, soil and even the top layer of bedrock. So a team of university scientists and a NASA colleague were greatly surprised to discover an ancient tundra landscape preserved under the Greenland Ice Sheet, below two miles of ice.

Greenland ice cores show industrial record of acid rain

The rise and fall of acid rain is a global experiment whose results are preserved in the geologic record.

Scientists map (track) Greenland ice sheet summer melt

For the first time, a NASA airborne campaign will measure changes in the height of the Greenland Ice Sheet and surrounding Arctic sea ice produced by a single season of summer melt.

Video: Mega-canyon found under Greenland ice sheet

Data from a NASA airborne science mission reveals evidence of a large and previously unknown canyon hidden under a mile of Greenland ice. The canyon has the characteristics of a winding river channel and is at least 460 miles (750 kilometers) long, making it longer than the Grand Canyon.

Ancient ice cores give clues to effects of global warming

A new study indicates that the last interglacial period may give us a picture of where the planet is headed now, as greenhouse gases increase and temperatures rise.

Polar ice sheets shrinking ever faster

The planet's two largest ice sheets are melting faster then ever before - three times as fast as they were just 20 years ago.

Methane emissions traced to Roman times

Human beings have been pumping methane into the atmosphere since Roman times, in enough quantity for it to show up in the Greenland ice sheet.

Greenland ice sheet won't disappear all at once



Greenland's ice sheet is rapidly melting, but an international team of scientists say predicting its complete disappearance would be premature.

Greenland ice melt 'unprecedented', says NASA

Almost all of Greenland's surface ice cover has melted at some point this summer - twice as much as usual. It's the largest melt ever seen in more than 30 years of satellite observations.

Huge ice island breaks away from Greenland glacier

The second-largest ice island in 50 years - twice the size of Manhattan - has broken away from Greenland's Petermann Glacier.

Ancient impact crater found in Greenland



An international team of scientists has identified an ancient 100 kilometer-wide crater near the Maniitsoq region of West Greenland.

Sea level rise may be less severe than feared

While Greenland's glaciers are moving ever-faster twowards the sea, they're not accelerating as much as believed, indicating that future sea level rises could be a lot less than current worst-case scenarios.

Greenland ice sheet on the slide

The Greenland Ice Sheet is accelerating in its slide into the ocean, like snow sliding off a roof on a sunny day.

Greenland ice sheet may melt completely

The Greenland ice sheet appears more vulnerable to global warming than previously thought, and could disappear altogether if global temperatures rise more than 1.6 degrees Celcius above pre-industrial levels.

Greenland lifts as ice sheet melts

Greenland's bedrock rose by more than three quarters of an inch in some places, following 2010's major loss of ice.

Whales navigate Northwest Passage for first time in thousands of years

Bowhead whales have navigated the Northwest Passage between the Atlantic and Pacific oceans for what could be the first time in nearly 10,000 years.

Greenland ice melt sets new record

Last year's melting of the Greenland Ice Sheet was the worst ever recorded, according to research from the City College of New York.

Ice caps melting far slower than believed

The Greenland and West Antarctic ice caps are melting at half the expected rate, according to a joint US-Dutch team.

Greenland glacier retreats a mile in just two days

Seven square miles of a Greenland glacier broke off in two days last week, leaving the calving edge of the ice sheet a mile further inland.

Greenland rises as ice cap melts

It's not just sea levels that are rising as Greenland's ice melts - Greenland is too.