Sentences with phrase «of ice shelf»

This implies that something weakened the center of the ice shelf.

In the images, Jeong et al. saw a rift open in the surface of the ice shelf nearly 20 miles (32 kilometers) inland in 2013.

Rifts usually form at the sides of an ice shelf where the ice is thin and subject to shearing that rips it apart.

Another clue that the center of the ice shelf is weak is that the rift opened in the bottom of a «valley» in the ice shelf where the ice had thinned compared to the surrounding ice shelf.

A new branch on the Larsen C crack has sprouted out of nowhere, speeding the imminent break of the ice shelf.

Chloride = 31,000 p.p.m. (de-icing agents) trapped under the ice, is causing the bottom of the ice shelf to thaw, resulting in continuous thinning and acceleration of glacial melt (under water glacier cutting).

[Response: You are confusing a normal and periodic calving event with the total collapse of an ice shelf — kind of like the difference between a haircut and decapitation.

Those satellites images revealed widespread melt ponds not just at Cabinet Inlet, but on other parts of the ice shelf.

Analysis of various ice - shelf configurations reveals characteristic patterns in the strain rates near the ice front which we use to describe the stability of the ice shelf.

It serves as a brake on the pace of glaciers on their journey down to the sea — and the combined impact of warmer atmospheres and warmer seas in the Southern Ocean are rapidly thinning much of the ice shelf.

The PIG Principle: The breaking apart of the ice shelf in the channels is similar to removing an ice jam from a river.

This photo shows the ice front of the ice shelf in front of Pine Island Glacier, a major glacier system of West Antarctica.

Bindschandler and his team observed waves on the top of the ice sheets that were between 33 and 48 feet (10 and 15 meters) tall; when they correlated those to waves on the bottom of the ice shelf, there was a noticeable difference.

Lead author of the study Joseph MacGregor said in a statement: «Typically, the leading edge of an ice shelf moves forward steadily over time, retreating episodically when an iceberg calves off (breaks off and floats out to sea), but that is not what happened along the shear margins.»

Airborne data showed the ice shelf was up to 492 feet (150 meters) thinner when the warmer water was present, allowing Bindschadler's team to establish a direct link between the rate of ice shelf melting and atmospheric wind speed.

I mean the Arctic looks likely to be ice free this or next northern summer, huge pieces of ice shelf are breaking off Antartica and galciers are retreating at rate unseen before according to all geological records and all this is caused by... wait for it... the earth cooling!

When surface winds are strong, they stir the Southern Ocean and lift the warm water (red) onto the continental shelf where the additional heat contributes to melt of the ice shelf.

Jonathan Kingslake, an assistant professor at Columbia University's Lamont - Doherty Earth Observatory, also raised concerns about the stability of the ice shelf and other Antarctic ice shelves amid changes underway in the region.

However, the great majority of previous work only focuses on one portion of the ice shelf at a time, or only short snapshots of the ice shelves» behavior.

These missions - satellite radar altimetry projects overseen by the European Space Agency (ESA)- lasted from 1994 to 2012, providing the researchers plenty of data that could even be overlapped and compared to ensure an accurate assessment of ice shelf thickness for more than a decade.

During a flight over the Pine Island Glacier ice shelf, the DC - 8 banks over the Amundsen Sea and the clean edge of the ice shelf front.

These models allow us to assess the contribution of tides to melting of the ice shelf by the ocean.

Present uncertainties of ice shelf mass loss are large, however, with estimates of their contribution to sea level rise ranging from a few centimeters to over one meter.

However, the loss of such a massive ice berg from Larsen C, the present human - forced warming of the Antarctic land and ocean environment, and the presently observed thinning of the ice shelf all point toward a rising risk of destabilization or disintegration.

Scenarios of deglaciation (Meehl et al., 2007 Section 10.7.4.4) assume that any such increase would be outweighed by accelerated discharge of ice following weakening or collapse of an ice shelf due to melting at its surface or its base (*).

(Large section of Larsen C is moving far faster than the rest of the ice shelf toward the Southern Ocean.

Warmer air and ocean temperatures have caused the glacier to detach from a stabilizing sill and retreat rapidly along a downward - sloping, marine - based bed... After 8 years of decay of its ice shelf, Zachariæ Isstrøm, a major glacier of northeast Greenland that holds a 0.5 - meter sea - level rise equivalent, entered a phase of accelerated retreat in fall 2012.

The consequences on the rest of the ice shelf are not clear at this point.

A team led by Ala Khazendar of NASA's Jet Propulsion Laboratory in Pasadena, California, found evidence of the ice shelf flowing faster and becoming more fragmented.

The accelerating pace of ice shelf melting can be attributed to global warming, which is increasing faster at the planet's poles than anywhere else, the researchers pointed out.

New paper finds East Antarctic ice sheet will have negative contribution to sea levels over next 200 years — Published The Cryosphere — Paper «studies one of the largest ice shelves in East Antarctica and predicts increased accumulation of ice on the surface of the ice shelf will have a net contribution of decreasing sea levels over the 21st and 22nd centuries.

Like the rates of ice shelf melt right now, these figures are relatively modest, but they are a reminder of how much climate scientists still have to learn about the complex physics of ice, climate and atmospheric circulation.

News like the disintegration of an ice shelf the size of Rhode Island a month ago conjures a vision that a warming world will lead to doom by drowning — not from melting ice shelves, which like melting ice in a glass do not change water levels, but from melting ice sheets sending their fresh water flowing toward the sea.

The finding indicates that this part of the ice shelf had been open water at least once before.

This out - flow of water from under the ice pulls in more deep water to melt more ice from the bottom of the ice shelf.

These typically occurred when a rift at the heavily fractured shear margin propagated across the width of the ice shelf.

Although only a tiny fraction of the ice shelf melts, the water infiltrates the shelf through small cracks in the ice.

It is the first winter ice loss of an ice shelf ever observed, and so was surprising.

Other recent research shows that without the channelized underbelly of the ice shelf and glacier, melting would be even more rapid.

Increased delivery of warm ocean water into the sub-ice shelf cavity may therefore cause not only thinning but also structural weakening of the ice shelf, perhaps, as a prelude to eventual collapse.»

The impacts of ice shelf collapse and ensuing glacier acceleration are substantial, but in general, the effects of ocean melt are proving to be far more important in controlling ice sheet mass balance.

This rift is the second to form in the center of the ice shelf in the past three years.

«Even though we don't see immediate evidence of ice shelf breakup on the Ross Ice Shelf, everything we've seen up to this point has occurred faster than we expected.

In this case the thinning and resultant structural weaknesses preconditioned the ice to rapid breakup, which proceeded to lose only the preconditioned portion of the ice shelf.

Work done in the southern hemisphere's summer, December through January 2012 - 13, included drilling holes in the ice to place a variety of instruments and using radar to map the underside of the ice shelf and the bottom of the ocean.

In the wake of an ice shelf collapse, however, the resulting glacier acceleration can raise sea level by introducing a new ice mass into the ocean.

The researchers believe that the interaction of the ocean beneath the ice shelf and melting of the ice shelf is an important variable that should be incorporated into the sea level rise models of global warming.

In contrast, we report on the recent development of multiple rifts initiating from basal crevasses in the center of the ice shelf, resulted in calving further upglacier than previously observed.

Most scientists had figured that even after the air got warm enough to melt the surface of an ice shelf, it would take millennia for the entire great mass to melt away.

Breakup of an ice shelf (Larsen) leads to a speedup of glacier movement: Rignot et al. (2004), Scambos et al. (2004)(who also note lubrication by percolating water, see following note).