Sentences with phrase «parts of the ice sheet»

They found that western Antarctica has recently seen warmer, saltier water being driven under the shelf — the part of the ice sheet that sticks out over the ocean (Science, doi.org/xkx).

In effect, this UAV survey across the ablation zone of the ice sheet perfectly bridges the gap between people on the ground studying what's under their feet in just one part of the ice sheet, and the satellite data that shows what's going on across the entire ice sheet.

Even if the central parts of the ice sheet can survive a warming climate, melting is likely at the extremities, says Sugden.

The work will continue for two more summers, exploring different parts of the ice sheet.

So parts of these ice sheets, but not all, must have melted during the long - ago warm period.

When large parts of the ice sheet melted at the end of the ice age, the weight of the ice sheet decreased, and the crust began to rebound.

Parts of the ice sheet considered at risk hold enough ice to raise the global sea level by 22 feet.

Water that collects in valleys underneath the ice sheet, in the Gamburtsev Mountains, refreezes when it passes under thinner parts of the ice sheet that are less insulated from cool surface temperatures.

The oldest ice, trapped in the deepest part of the ice sheet, could reveal temperatures eons ago.

«We had little information in the south, but we had three or four more cores in the northern part of the ice sheet.

«The fact that the mass loss of the Greenland Ice Sheet has generally increased over the last decades is well known,» Khan said, «but the increasing contribution from the northeastern part of the ice sheet is new and very surprising.»

Glaciers are found in mountain valleys and also form parts of ice sheets.

This feedback could potentially result in the rapid loss of parts of the ice sheet, as grounding lines retreat along troughs and basins that deepen towards the ice sheet's interior.

An additional new feature is the increasingly visible fast dynamic response of ice shelves, for example, the dramatic breakup of the Larsen B Ice Shelf in 2002, and the acceleration of tributary glaciers and ice streams, with possible consequences for the adjacent part of the ice sheets.

Numerical computer modelling of the glacier for these different time periods will help us understand whether this part of the ice sheet is susceptible to rising sea level, warming oceans or increased atmospheric temperatures.

Other factors would include: — albedo shifts (both from ice > water, and from increased biological activity, and from edge melt revealing more land, and from more old dust coming to the surface...); — direct effect of CO2 on ice (the former weakens the latter); — increasing, and increasingly warm, rain fall on ice; — «stuck» weather systems bringing more and more warm tropical air ever further toward the poles; — melting of sea ice shelf increasing mobility of glaciers; — sea water getting under parts of the ice sheets where the base is below sea level; — melt water lubricating the ice sheet base; — changes in ocean currents -LRB-?)

Nick, once parts of the ice sheet are bergs in the ocean, it floats, right!

In one projected event, large parts of the ice sheet melt and drain into the ocean over the next millennia, raising global sea levels by several tens of meters.

My Columbia University colleague Dr. James Hansen, for 30 years NASA's leading climate scientist, warns us that even with warming well below 2 - degree C, human - induced warming could lead to the disintegration of parts of the ice sheets of Antarctica and Greenland, causing the sea level to rise by as much as 6 - 9 meters.

A massive ice sheet almost completely covers Greenland, and as summertime temperatures climb and sunlight hours lengthen, parts of the ice sheet surface usually melt, especially at lower elevations near the coast.

Previous studies suggested impurities such as black carbon and dust drive melting of bare ice on the lower part of the ice sheet.

Eventually, the leading edge forms a cantilevered ice shelf that floats on the water but remains attached to the anchored part of the ice sheet.

It is truly a function of the distance and path from the location of evaporation to the location that the water molecules became part of the ice sheet.

The base is currently buried about 35 meters below the surface but the part of the ice sheet that covers the camp may start to melt by the end of the century if current warming trends continue, scientists warned.

Ice shelves are the most vulnerable part of the ice sheets.

Unfortunately, they are also the part of the ice sheet most at risk.

The implication was that it could become atmospheric CO2, should parts of the ice sheet melt.

The remaining amount is coming from increased surface melting, which is no longer confined to the southern part of the ice sheet — the amount of ice accumulating in the inland part of the ice sheet is starting to decline as well.

The discovery raises fresh questions about the speed at which sea levels might rise in a warmer world due to the rate at which parts of the ice sheets slide from the land into the ocean, scientists said at the American Association for the Advancement of Science in San Francisco.

Not exact matches

Peter Neff, a glaciologist at the University of Rochester who travels regularly to the Antarctic, said ground observations would never tell you the full story of what's going on with ice sheets in that part of the world.

Using an ice cream scoop, place mounds of the cookie dough 1/2 inch a part on the baking sheet.

1) Mix flour, butter and icing sugar in a bowl using two knives to cut the butter until the mixture resembles fine breadcrumbs 2) Add in the egg yolks and vanilla extracts and mix well, then add iced water until the dough starts to come together 3) Shape the dough into a ball on a cool, flat, floured surface 4) Flatten dough into a disc and then wrap in plastic wrap, and chill in the refrigerator for at least 30 minutes 5) Meanwhile, peel, core and slice the apples into as thin slices as possible 6) Mix sugar and ground cinnamon powder with sliced apples and let it rest for a while 7) Pre-heat oven to 180 deg cel 8) Once dough has chilled, roll pastry dough on a sheet of parchment paper until it has expanded to the size of the tart mold (I used a rough mold the size of a large pizza) 9) Leaving at least an inch of dough free, arrange apple slices by overlapping them slightly in the shape of a circle, starting from the outermost part of the circle, until you reach the inside 10) Fold the edges of dough over the filling and then sprinkle the dough with a bit of sugar 11) Bake for about 40 - 45 minutes, or until the crust is golden brown and the apples are soft 12) Serve warm, with a side of whipped cream or ice cream (optional)

But, rapid change in the behavior of parts of the Antarctic ice sheet might cause much greater rise than is often included in coastal planning.

The Earth's climate system is characterised by complex interactions between the atmosphere, oceans, ice sheets, landmasses and the biosphere (parts of the world with plant and animal life).

Any parts of the bed this low are easily exposed to ocean water, allowing the ice sheet to weaken from below as the ocean water warms.

Parts of the massive ice sheet once considered stable have been shown to be melting in new research

But now Jonathan Bamber at Bristol University, UK, has analysed which parts of the West Antarctic ice sheet are vulnerable.

We may have already changed the ice sheets to a point that some parts of them may go, but we have the ability to stop changing it more and to adapt to what we have already done.

Lacking many ice shelves to stem its flow, the glacier is particularly vulnerable to warming, part of the so - called weak underbelly of the West Antarctic Ice Sheice shelves to stem its flow, the glacier is particularly vulnerable to warming, part of the so - called weak underbelly of the West Antarctic Ice SheIce Sheet.

This effect is particularly apparent in parts of the West Antarctic Ice Sheet (WAIS), long regarded as the more vulnerable part of the continent to climate change.

Paolo agrees that the new measurements are only part of the ongoing story about the future of Antarctica's ice sheet.

Thousands of marks on the Antarctic seafloor, caused by icebergs which broke free from glaciers more than ten thousand years ago, show how part of the Antarctic Ice Sheet retreated rapidly at the end of the last ice age as it balanced precariously on sloping ground and became unstabIce Sheet retreated rapidly at the end of the last ice age as it balanced precariously on sloping ground and became unstabice age as it balanced precariously on sloping ground and became unstable.

«IceBridge surveyed previously unexplored parts of the Greenland Ice Sheet and did it using state - of - the - art CReSIS radars,» said study co-author Mark Fahnestock, an IceBridge science team member and glaciologist from the Geophysical Institute at the University of Alaska Fairbanks (UAF - GI).

the south - bound expedition had cleared that vast plain of floating ice which flows down from the great mountains of the interior and covers the southern part of Ross Sea throughout an area above 20,000 square miles with an ice sheet approximately 800 feet in thickness, and had begun to climb the heights which form the mountainous embayment at the head of Ross Sea.

In parts, it's nearly three miles thick, and, with the nearby West Antarctic Ice Sheet, it blankets an expanse roughly the size of the United States and Mexico combined.

When parts of the ice melt, liquid water trickles to the base and this can lubricate the underside of the ice sheet, allowing it to slide more quickly into the sea and drive up sea levels at a faster rate.

«There's a growing push to understand the impact of microorganisms on glaciers and ice sheets,» says Christopher Williamson, a microbiologist at the University of Bristol in England who wasn't part of the study.

Williamson is part of a five - year project investigating the impact of ice algae, which is different than snow algae, and bacteria on the Greenland ice sheet (SN: 5/20/00, p. 328).

Part of the fresh water likely originates from melting of the Greenland Ice Sheet north of the Young Sound and is transported with the East Greenland ocean current along the eastern coast of Greenland.

Ice sheets aren't the static scabs of frost that scientists once imagined, but rather complex structures with many moving parts.