Sentences with phrase «flowing ice streams»

The margins usually slope more steeply, and most ice is discharged through fast - flowing ice streams or outlet glaciers, in some cases into the sea or into ice shelves floating on the sea.

Fast - flowing ice streams draining the WAIS (Pine Island Glacier and Thwaites Glacier in particular) into the Amundsen Sea have a grounding line on a reverse bed slope, becoming deeper inland.

Lead author Dr Malcolm McMillan from the University of Leeds said: «We find that ice losses continue to be most pronounced along the fast - flowing ice streams of the Amundsen Sea sector, with thinning rates of between 4 and 8 metres per year near to the grounding lines of the Pine Island, Thwaites and Smith Glaciers.»

Not exact matches

People are dying from the ice and snow.Perhaps what we need is the jet stream to flow over the CPAC conference and allow some cooler air to drown out the rightwing hot air.

These flow rates are unprecedented: they appear to be the fastest ever recorded for any glacier or ice stream in Greenland or Antarctica, the researchers say.

Increased ice flow in this region is particularly troubling, Khan said, because the northeast ice stream stretches more than 600 kilometers (about 373 miles) into the center of the ice sheet, where it connects with the heart of Greenland's ice reservoir.

A new three - dimensional higher - order thermomechanical ice sheet model: Basic sensitivity, ice stream development, and ice flow across subglacial lakes.

Merry, C.J. and I.M. Whillans (1993) Ice - flow features on ice stream B, Antarctica, revealed by SPOT HRV imagery, Journal of Glaciology, vIce - flow features on ice stream B, Antarctica, revealed by SPOT HRV imagery, Journal of Glaciology, vice stream B, Antarctica, revealed by SPOT HRV imagery, Journal of Glaciology, vol.

The ice streams in Antarctica will be flowing rapidly due to basal sliding — so it is incorrect to say that all glaciers are flowing by internal deformation only.

Changes in the configuration of ice stream flow from the West Antarctic Ice Sheet, Journal of Geophysical Research, 101 (B3), p. 5499 - 55ice stream flow from the West Antarctic Ice Sheet, Journal of Geophysical Research, 101 (B3), p. 5499 - 55Ice Sheet, Journal of Geophysical Research, 101 (B3), p. 5499 - 5504.

Changes in the configuration of ice stream flow from the West Antarctic Ice Sheice stream flow from the West Antarctic Ice SheIce Sheet.

Changes in the configuration of ice stream flow from the West Antarctic ice sheet.

Alley, R.B. Ice - stream flow on deforming sediments: ice stream B — and Lake MichigIce - stream flow on deforming sediments: ice stream B — and Lake Michigice stream B — and Lake Michigan?

This required a model with a full representation of all the forces involved in ice flow applied specifically to PIG: «A more detailed understanding of PIG's departure from equilibrium flow will require an understanding of its particular stream mechanics» (Shepherd et al., 2001).

Complex ice stream flow revealed by sequential satellite imagery.

Anandakrishnan, S., R.B. Alley, R.W. Jacobel and H. Conway, The flow regime of ice stream C and hypotheses concerning its recent stagnation, in R.B. Alley and R.A. Bindschadler, eds., The West Antarctic Ice Sheet: Behavior and Environment, American Geophysical Union, Antarctic Research Series, v. 77, p. 283 - 296 (200ice stream C and hypotheses concerning its recent stagnation, in R.B. Alley and R.A. Bindschadler, eds., The West Antarctic Ice Sheet: Behavior and Environment, American Geophysical Union, Antarctic Research Series, v. 77, p. 283 - 296 (200Ice Sheet: Behavior and Environment, American Geophysical Union, Antarctic Research Series, v. 77, p. 283 - 296 (2001).

A new numerical model of coupled inland, ice stream, and ice shelf flow and its application to the West Antarctic ice sheet, JGR.

This process produces fast - flowing channels in the ice sheet — these are ice streams.

The ice stream is steepening, which increases the gravitational driving stress, helping it to flow faster, and there is no indication that the glacier is approaching a steady state10.

It flows, together with Thwaites Ice Stream, into the Amundsen Sea embayment in West Antarctica, and the two ice streams together drain ~ 5 % of the Antarctic Ice SheeIce Stream, into the Amundsen Sea embayment in West Antarctica, and the two ice streams together drain ~ 5 % of the Antarctic Ice Sheeice streams together drain ~ 5 % of the Antarctic Ice SheeIce Sheet1.

The problem with the paleoclimate ice sheet models is that they do not generally contain the physics of ice streams, effects of surface melt descending through crevasses and lubricating basal flow, or realistic interactions with the ocean.

Present ice streams draining the Greenland and Antarctic ice sheets have characteristic concave surface profiles produced when slow interior sheet flow is downdrawn by fast stream flow near ice - sheet margins.

This illustrates two things, that PIG flow regime has not changed much for quite awhile and two that all the action from topography and changing basal conditions is happening lower in the ice stream.

Terran: An examination of a map of glacier velocity for either the Pine Island presented in this post or of the ice streams feeding the Ross Ice Shelf indicate that most of the ice sheet region is not a fast flow regiice streams feeding the Ross Ice Shelf indicate that most of the ice sheet region is not a fast flow regiIce Shelf indicate that most of the ice sheet region is not a fast flow regiice sheet region is not a fast flow region.

Even without a melt the ice would form glaciers and the flow in to the sea to form icebergs which would melt when they reach warmer water in the gulf stream.

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.

The mechanism for their rapid movement is being intensively studied because of the possibility that rapid ice - stream flow may cause the ice sheet to disintegrate, resulting in a disastrous rise in world - wide sea level.

The discovery is significant in relation to the mechanism for rapid movement of the ice streams, which are huge, fast - flowing ice currents within the slow - moving ice sheet that covers most of Antarctica.

The authors first simulated flow in the ice sheet's streams and shelves in response to various fossil fuel emission scenarios after the year 2010.

Subsequent work pointing in the same direction included De Angelis and Skvarca (2003), who found that Antarctic grounded ice surged after an ice shelf breakup, and Bindschadler et al. (2003), who reported that a major West Antarctic ice stream started and stopped flowing as the tide went up and down.

Note the greater flow of the southern ice stream in 2000, compare to the northern ice stream in this image from Ian Joughin:

I have alluded to Phillips» opinion, because I see in Geikie's late work that reference is made to the fact that from the foot of glaciers in Greenland streams of water issue and unite to form considerable rivers, one of which, after a course of forty miles, enters the sea with a mouth nearly three - quarters of a mile in breadth — the water flowing freely at a time when the outside sea was thickly covered with ice.

Those are fast - flowing streams of ice,» said Martinson, who specializes in polar oceans.

Two of the ice streams that flow in the Ross Ice Shelf have slowed, they said, and that area of Antarctica is gaining maice streams that flow in the Ross Ice Shelf have slowed, they said, and that area of Antarctica is gaining maIce Shelf have slowed, they said, and that area of Antarctica is gaining mass.

One Ross ice stream stopped flowing 150 years ago.

These floating ice shelves act like a cork in a bottle, limiting how quickly the streams flow.

Humboldt Glacier is much different as the lack of confining topography prevents the development of the strong ice stream flow we see on Jakobshavn Glacier or the weaker ice stream flow of Petermann Glacier and its subsequent long floating tongue.

In addition, rivers that were experiencing larger stream flows were usually in little - populated areas, such as the Arctic where melting ice is inundating river systems.

In 2000, Ice Stream A, the southern most of several major ice streams draining from Marie Byrd Land into the Ross Ice Shelf, flowing west to Gould Coast to the south of Whillans Ice Stream, Antarctica was renamed the Mercer Ice Stream in his honor.&raqIce Stream A, the southern most of several major ice streams draining from Marie Byrd Land into the Ross Ice Shelf, flowing west to Gould Coast to the south of Whillans Ice Stream, Antarctica was renamed the Mercer Ice Stream in his honor.&raqice streams draining from Marie Byrd Land into the Ross Ice Shelf, flowing west to Gould Coast to the south of Whillans Ice Stream, Antarctica was renamed the Mercer Ice Stream in his honor.&raqIce Shelf, flowing west to Gould Coast to the south of Whillans Ice Stream, Antarctica was renamed the Mercer Ice Stream in his honor.&raqIce Stream, Antarctica was renamed the Mercer Ice Stream in his honor.&raqIce Stream in his honor.»

The ice stream's speed - up and near - doubling of ice flow from land into the ocean has increased the rate of sea level rise by about.06 millimeters (about.002 inches) per year, or roughly 4 percent of the 20th century rate of sea level increase.

The researchers say that stagnation of some of the region's ice stream flows is the primary contributor to the ice buildup.

One is that the evidence for change in the expected direction if climate change was having an effect — that is, changes in physical (ice sheets, stream flow, coastal erosion etc.) and biological systems (timing of breeding events, shifting species ranges, population declines etc.)-- is overwhelming.

-- Scientists poring over military and satellite imagery have mapped the unimaginable: a network of rivers, streams, ponds, lakes and even a waterfall, flowing over the ice shelf of a continent with an annual mean temperature of more than -50 C.

and his fellow explorers on their way to the magnetic South Pole found that they had to cross and recross flowing streams and lakes on the Nansen Ice Shelf.

LONDON, 22 April, 2017 — Scientists poring over military and satellite imagery have mapped the unimaginable: a network of rivers, streams, ponds, lakes and even a waterfall, flowing over the ice shelf of a continent with an annual mean temperature of more than -50 C.

Long, roughly parallel cracks score the surface, formed by water and pressure; impossibly blue lakes of meltwater fill depressions; and veiny networks of azure streams meander west, flowing to the edge of the ice sheet and eventually out to sea.

In 1909 Ernest Shackleton and his fellow explorers on their way to the magnetic South Pole found that they had to cross and recross flowing streams and lakes on the Nansen Ice Shelf.