The so-called oceanic troughs expose the glaciers to warm water from the surrounding oceans.
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.
How likely is it that mountain glaciers' retreat is caused by climate change? About 99 percent likely, according to a new study.
Though they appear to be frozen giants, glaciers and ice sheets can move and change in unexpected ways over time.
An avalanche of ice that killed nine in western Tibet may be a sign that climate change has come to the region, a new study finds.
The West Antarctic Ice Sheet is melting from the inside out, which could lead to worldwide coastal flooding.
An icy whodunit is gripping glaciologists puzzled over two massive ice avalanches in Tibet that seemed at first to have no culprit.
A massive ice avalanche captured in images from space could have been caused by climate change, say researchers who are stymied by why a glacier tongue would shear off like it did.
Acadia National Park is located in the far northeastern corner of Maine. Come see this park's amazing geological wonders.
The plan is to "have dozens of ice core archives stored in a snow cave — the most reliable and natural freezer in the world."
A primeval river network lies beneath Greenland's largest glacier, and it may be home to massive canyons about as big as the Grand Canyon.
A large lake and a gaping rift about as deep as the Grand Canyon but way longer may be lurking undetected beneath East Antarctica.
Sea level rise is occurring right now, but the magnitude and speed of the rise in the future is still a big unknown.