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Cracks in the floating ice tongue of Petermann Glacier in the far northwest reaches of Greenland indicate the pending loss of another large iceberg.

Researchers have developed a new isotopic method to analyze the recent history of large stratospheric volcanic eruptions, using 2,600 years' worth of records contained in ice cores from Antarctica. Stratospheric eruptions can launch sulfate particles more than 6 miles above Earth's surface, where they reflect sunlight and temporarily cool the planet. By understanding the history of big eruptions, researchers can place short cooling episodes and other climate events into the context of large-scale climate patterns.

The discovery of a new to science species of rare and primitive arthropod in a cave that was covered by a thick ice sheet until recently is certain to raise questions. Researchers describe a new species of cave-dwelling, insect-like dipluran from the island of Vancouver (Canada) and discuss its origin.

Scientists put forward new explanation as to how land bridge formed between North and South America.

A team has found that early spring rainfall warms up a thawing permafrost bog in Alaska and promotes the growth of plants and methane-producing microbes.

A field trip to Namibia to study volcanic rocks led to an unexpected discovery by geologists.

The Greenland ice sheet melted a little more easily in the past than it does today because of geological changes, and most of Greenland's ice can be saved from melting if warming is controlled, say researchers.

A gigantic cavity -- two-thirds the area of Manhattan and almost 1,000 feet (300 meters) tall -- growing at the bottom of Thwaites Glacier in West Antarctica is one of several disturbing discoveries reported in a new study of the disintegrating glacier.

Around 635 to 720 million years ago, Earth was twice almost completely covered by ice. The question of how life survived these 'Snowball Earth' glaciations has puzzled scientists for many decades. Researchers have now found the first detailed glimpse of life after the 'Snowball' in the form of newly discovered ancient molecules, buried in old rocks.

In one of the coldest, driest places on Earth, scientists have developed a possible answer to a longstanding mystery about the chemistry of streamflow, which may have broad implications for watersheds and water quality around the world.

Planes flying over rain or snow can intensify the precipitation by as much as 10-fold, according to a new study. The rain- and snow-bursts are not caused by emissions from the aircraft but are the peculiar consequence of the aircrafts' wings passing though clouds of supercooled water droplets in cloud layers above a layer of active rain or snow.

An international study reveals the Atlantic meridional overturning circulation, which helps regulate Earth's climate, is highly variable and primarily driven by the conversion of warm, salty, shallow waters into colder, fresher, deep waters moving south through the Irminger and Iceland basins. This upends prevailing ideas and may help scientists better predict Arctic ice melt and future changes in the ocean's ability to mitigate climate change by storing excess atmospheric carbon.

The eruption of Mount Pinatubo in 1991 had a significant impact on climate, decreasing global mean temperature by about 0.5°C. Like the famous eruptions of Krakatau (1883) and Tambora (1815), Pinatubo is located in the tropics, which has been considered an important factor underlying its strong climate forcing. New research shows that explosive extratropical eruptions can have a strong impact on the climate too.

Glacial retreat in the Canadian Arctic has uncovered landscapes that haven't been ice-free in more than 40,000 years and the region may be experiencing its warmest century in 115,000 years.

A team of scientists and engineers has for the first time successfully drilled over two kilometers through the ice sheet in West Antarctica using hot water. This research will help understand how the region will respond to a warming climate.

Scientists have already observed and predicted that high ringed seal pup mortality rates are linked to poor environmental conditions like early ice breakup and low snow. Researchers have now gone a step further by coupling these hypotheses with forecasts of future spring snow and ice conditions, developing a mathematical model, and following it to some stark conclusions for populations off the Amundsen Gulf and Prince Albert Sound in Canada.

The population of Antarctic krill, the favorite food of many whales, penguins, fish and seals, shifted southward during a recent period of warming in their key habitat, researchers report.

A rapid rise in temperature on ancient Earth triggered a climate response that may have prolonged the warming for many thousands of years, according to scientists.

Greenland is melting faster than scientists previously thought -- and will likely lead to faster sea level rise -- thanks to the continued, accelerating warming of the Earth's atmosphere, a new study has found.

An international team of researchers has unveiled local drivers of amplified arctic warming.