Sentences with phrase «of parts of the ice sheet»

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.

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.

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.

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).

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.

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.

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.

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

«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.

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

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.

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

«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.

It is the only marine ice sheet to have survived beyond the last ice age, and just as scientists predicted 30 years ago, the parts of it that are shrinking are those that are raked by sea currents.

«It is very plausible that the mechanism revealed by this research will push parts of the West Antarctic Ice Sheet beyond a point of no return,» said Dr Axel Timmerman, Prof of Oceanography at University of Hawaii and an IPCC lead author who has seen the paper.

This is the case with land - based ice sheets in the Arctic, Greenland and parts of Antarctica.

The sediment cores used in this study cover a period when the planet went through many climate cycles driven by variations in Earth's orbit, from extreme glacial periods such as the Last Glacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively warm interglacial periods with climates more like today's.

Hawkings and his collaborators spent three months in 2012 and 2013 gathering water samples and measuring the flow of water from the 600 - square - kilometer (230 - square - mile) Leverett Glacier and the smaller, 36 - square - kilometer (14 - square - mile) Kiattuut Sermiat Glacier in Greenland as part of a Natural Environment Research Council - funded project to understand how much phosphorus, in various forms, was escaping from the ice sheet over time and draining into the sea.

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.

The international research initiative IceGeoHeat led by the GFZ German Research Centre for Geosciences establishes in the current online issue of Nature Geoscience that this effect can not be neglected when modeling the ice sheet as part of a climate study.

Such lakes of water pool at the bottom of an ice sheet or glacier, and were known to be scattered under parts of Antarctica.

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.

Based on the southern core we thought this was a localized low heat - flux region — but our model shows that a much larger part of the southern ice sheet has low heat flux.

«The beds at the margins of the ice sheet... are probably one of the least explored parts of Earth's surface,» said Ian Howat, a glaciologist at Ohio State University who did not participate in the research.

Radar measurements of the height of the ice over parts of the continent suggest that the huge East Antarctic ice sheet grew slightly between 1992 and 2003.

«During the last ice age around 20,000 years ago, large parts of Canada were covered by an ice sheet.

The academics suggest that the melting of the ice sheet may have been caused in part by the fact that some of it rests in basins below sea level.

«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.&raqIce 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.&rSheet 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.&raqice sheet is new and very surprising.&rsheet is new and very surprising.»

But the large volumes of data on Arctic sea and land ice that IceBridge has collected during its nine years of operations there have also enabled scientific discoveries ranging from the first map showing what parts of the bottom of the massive Greenland Ice Sheet are thawed to improvements in snowfall accumulation models for all of Greenlaice that IceBridge has collected during its nine years of operations there have also enabled scientific discoveries ranging from the first map showing what parts of the bottom of the massive Greenland Ice Sheet are thawed to improvements in snowfall accumulation models for all of GreenlaIce Sheet are thawed to improvements in snowfall accumulation models for all of Greenland.

Like frozen levees, the retreating glaciers pin back more stable parts of the Greenland - size ice sheet.

The Cordilleran Ice Sheet covered large parts of North America during the Pleistocene - or last ice age - and was similar in mass to the Greenland Ice SheIce Sheet covered large parts of North America during the Pleistocene - or last ice age - and was similar in mass to the Greenland Ice Sheice age - and was similar in mass to the Greenland Ice SheIce Sheet.

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