Sentences with phrase «accelerate ice flow»

Surface melt on an ice sheet not only directly reduces the ice sheet mass but also can accelerate ice flow and even leads to further melting.

Leakage of the Greenland Ice Sheet through accelerated ice flow AU: * Rignot, E AF: Jet Propulsion Laboratory / Caltech, MS 300-319 4800 Oak Grove Drive, Pasadena, ca 91109 - 8099 United States AB: A map of coastal velocities of the Greenland ice sheet was produced from Radarsat - 1 acquired during the background mission of 2000 and combined with radio echo sounding data to estimate the ice discharge from the ice sheet.

Added to this is a term according to (4) simply based on the assumption that the accelerated ice flow observed 1993 - 2003 remains constant ever after, adding another 3 cm by the year 2095.

Not exact matches

«Every single glacier that flowed into an ice shelf, when the shelf was removed, suddenly accelerated,» Scambos says.

A study published in 2011 by Scambos, Truffer and Pettit found that one glacier continues to accelerate even 15 years after losing its ice shelf: Röhss Glacier (which used to flow into the Prince Gustav ice shelf) has now reached nine times its former speed.

Nonetheless, Khazendar and his colleagues say that two of the glaciers flowing into Larsen C have already begun to accelerate as the ice shelf has weakened.

A glaciologist rather than a biologist, he wanted to investigate a question critical to climate change: Do subglacial rivers and lakes lubricate the movement of ice over land — and might they somehow accelerate a glacier's flow into the ocean, triggering rapid sea level rise?

Glaciologists reported in June that the last remnant of the Larsen B Ice Shelf is splintering, and glaciers flowing into it are accelerating.

Analyzing declassified images from spy satellites, researchers discovered that the downhill flow of ice on Antarctica's Larsen B ice shelf was already accelerating as early as the 1960s and»70s.

Since so much of the ice sheet is grounded underwater, rising sea levels may have the effect of lifting the sheets, allowing more - and increasingly warmer - water underneath it, leading to further bottom melting, more ice shelf disintegration, accelerated glacial flow, and further sea level rise, and so on and on, another vicious cycle.

Multi-panel paintings in oil and smaller paintings on canvas and aluminum formats explore the tundra fragmented into puddles and bits of ice with small cascades flowing over the rocks, reminders of accelerated seasonal changes melting ice fields and sea ice.

This is in fact increasingly observed around the edges of Greenland and Antarctica in recent years: outlet glaciers and ice streams that drain the ice sheets have greatly accelerated their flow.

But without the ice shelves to impede the flow of glacial ice, typically moving 400 — 900 meters a year, the flow of ice from the continent could accelerate, leading to a thinning of the ice sheet on the edges of the Antarctic continent.

With melt - water lubricating the surface between the glaciers and the rocks on which they rested, ice flows were accelerating, flowing into the ocean at a pace of 2 meters an hour.

Because Antarctica drains more than 80 percent of its ice sheet through floating ice shelves, accelerated glacier flow has the potential to affect ice sheet mass balance dramatically and raise sea level (Pritchard et al. 2012).

In 2009, using ICESat, measurements of both Greenland and Antarctica found that dynamic thinning (ice loss resulting from accelerated glacier flow) now reached all latitudes in Greenland, and had intensified at key areas of Antarctica's grounding line.

«Once ice loss through the calving of icebergs goes beyond the passive shelf ice and cuts into the safety band, ice flow towards the ocean will accelerate, which might well entail an elevated contribution to sea - level rise for decades and centuries to come.»

Far more complex dynamics than one might assume — but the trend (and an accelerating one) is clear — more ice mass melting into water and flowing into the ocean.

And as they fall apart, the flow of land ice toward the sea accelerates, speeding up sea - level rise.

This allows the inland ice to accelerate its flow into the ocean — and accelerate sea level rise.

As with rock, with ice, flowing water is a very powerful eroding force which greatly accelerates the speed with which ice melts and disintegrates.

«An accelerating glacier can tear away from its margins, creating rifts that negate the margins» resistance to ice flow and causing additional acceleration,» she added.

LONDON, 15 February, 2016 — European researchers have once again warned that the thinning of the Antarctic ice shelf means that the flow of glaciers on the frozen continent could accelerate, with a consequent rise in sea levels.

Yet an increase in the surface area of crevasses can accelerate the flow because it means more of the ice's interior is exposed to warming by surface melt water.

The flow of glaciers held behind the ice shelf accelerated.

Pritchard points out that basal melt is a control on total mass waste ``... through a reduction in buttressing of the adjacent ice sheet leading to accelerated glacier flow.»

The team, led by earth scientists at Ohio State University, pinpointed a period in 2010 when high temperatures caused the natural ice flow out to sea to suddenly accelerate, and 100 billion tons of ice melted away from the continent in only 6 months...

Ice shelves do not raise sea level when they melt, but do seem to accelerate the flow of land - bound ice into the sea — one of the «unknowns» of global warmiIce shelves do not raise sea level when they melt, but do seem to accelerate the flow of land - bound ice into the sea — one of the «unknowns» of global warmiice into the sea — one of the «unknowns» of global warming.

Other factors being investigated are the impact of lakes on Greenland's glacial surfaces, the effect of dust and soot on the ice sheet (which have been shown to have a major impact in accelerating melting in Himalayan glaciers), and how surface meltwater affects ice flow into the ocean (previous research has shown that is speeds it and is increased by short term weather extremes).

Such accelerated flow leads to increased ice discharge into the ocean, but the relevant dynamical processes are not properly understood nor included in continental ice - sheet models, the main difficulty being the treatment of grounding - line migration in response to increased melting of ice by the ocean.

The shelf ice plays an important role in slowing the progress of south polar glaciers: remove the shelf ice and the glacier flow accelerates.