Glaciers

Glaciers are essentially giant rivers of ice that are formed over eons as fallen snow is compressed into layers of ice. Glaciers are found on about 10 percent of Earth's land area, with most of them found in the Arctic and Antarctica regions, but some occurring high up on mountains, even in tropical areas. Glacial ice makes up the ice sheets that cover Antarctica and Greenland, with glaciers flowing out to sea, where their ends float on the water as ice shelves. Eventually pieces of the ice shelves break off, or calve, to form icebergs. The movement of glaciers scours the underlying rock, and a glacier's movement can be affected by climate change, with worries that global warming could cause substantial glacial melt and impact global sea levels. For the latest news on glacier research and stunning views of these rivers of ice, see below.
Read More
Hidden Channels Beneath East Antarctica Could Cause Massive Melt
East Antarctica, Totten Glacier
March 18th, 2015
A glacier the size of California in East Antarctica is in danger of melting away, which could lead to an extreme thaw increases sea levels by about 11.5 feet (3.5 meters) worldwide if the glacier vanishes, a new study finds.
Read More »
Volcano Megafloods May Have Formed Europe’s Mightiest Waterfall
detifoss waterfall
February 10th, 2015
The eruption of volcanoes buried beneath Iceland's glacier may have triggered a series of megafloods that carved a giant canyon in a period of days, new research suggests.
Read More »
Arctic Sea Ice Dwindling Toward Record Winter Low
Air temperature anomaly map
March 12th, 2015
Winter is when Arctic sea ice reaches its peak extent, but this year it could set a record seasonal low.
Read More »
Glacier's Groans Can Pinpoint Iceberg Calving
Hans Glacier
February 5th, 2015
Iceberg calving events have distinctive sounds that could help scientists pinpoint how much ice is vanishing and contributing to sea level rise.
Read More »
Melting Glaciers Pose a Carbon Menace
Tibet glacier
January 21st, 2015
Melting glaciers pose another threat beyond sea level rise. They will dump massive amounts of organic carbon into the world's oceans, altering ecosystems.
Read More »
Mountains of Ice are Melting, But Don't Panic (Op-Ed)
Jakobshavn Glacier
December 12th, 2014
As ice melts, the world now has a chance to respond.
Read More »
Arctic Glacier Has Its Own Aquifer
Svalbard
March 11th, 2015
Isolated glaciers can store liquid water in their upper layers for years, similar to firn aquifers found in Greenland.
Read More »
Waking Beasts: Underwater Volcanoes Roused by Ice Ages
seafloor ridges
February 5th, 2015
The rise and fall of sea level during the past million years matches up with valleys and ridges on the seafloor, suggesting a link between underwater eruptions and ice ages, two new studies find.
Read More »
How Greenland Got Its Glaciers
Greenland Mountains
January 8th, 2015
Greenland is famous for its massive glaciers, but the region was relatively free of ice until about 2.7 million years ago, according to a new study. Before then, the Northern Hemisphere had been mostly ice-free for more than 500 million years.
Read More »
 
 
dy>