Sentences with phrase «about melting of ice sheets»

The findings sharpen the way glaciologists think about melting of ice sheets and how ice reflects light, according to Marek Stibal, a cryosphere ecologist at Charles University in Prague, Czech Republic and one of the lead authors of the new study.

«Based on the UN climate panel's report on sea level rise, supplemented with an expert elicitation about the melting of the ice sheets, for example, how fast the ice on Greenland and Antarctica will melt while considering the regional changes in the gravitational field and land uplift, we have calculated how much the sea will rise in Northern Europe,» explains Aslak Grinsted.

Not exact matches

Things I changed: - cut the sugar by about half, using mostly dark brown sugar for the molasses kick - scratched the nutmeg and allspice but added about 1/3 extra of all of the other spices and also added nearly a tsp of ground cardamon - replaced the veggie oil with melted leaf lard - scratched the raisins - baked it on a deep sheet for only ~ 20 minutes - just barely until firm to the touch - then cut that sheet into three layers - replaced the icing with my own 16 ounce cream cheese, 8 ounce butter, ~ 6 ounce heavy cream, ~ 5 ounce honey, 1 tsp vanilla combo - toasted the coconut before dressing the cake.

Estimated changes in the mass of Greenland's ice sheet suggest it is melting at a rate of about 239 cubic kilometres (57.3 cubic miles) per year.

The Greenland ice sheet occupies about 82 % of the surface of Greenland, and if melted would cause sea levels to rise by 7.2 metres.

The hope is that the cables could reveal secrets about what's happening underneath the ice sheets, especially about melting at the so - called grounding line, the place where the bottom of an ice sheet meets the slightly warmer ocean.

Today's red deer, which recolonized Europe after the ice sheet melted about 12,000 years ago, fall into three or four distinct lineages that likely correspond to separate southern regions to which the deer had retreated during the height of the ice age, Stanton says.

The study fuels a growing concern among scientists about the factors affecting the Antarctic ice sheet — namely, that warm ocean waters are helping to melt glaciers and drive greater levels of ice loss, particularly in West Antarctica.

Chen's team calculated that the biggest contribution is coming from the melting of the Greenland ice sheet, which is losing about 250 gigatonnes of ice each year.

Melting of glaciers and the massive ice sheets of Greenland and Antarctica will combine for a rise in sea levels of 25 meters, or about 80 feet.

Melting near the edges of the Greenland ice sheet, where the surface is below 4,000 feet, causes about half of its annual ice loss.

Shepherd said, though, that there still is still a lot of uncertainty about how much additional melt in some locations of the Greenland ice sheet will actually be lost to the ocean.

A new review analyzing three decades of research on the historic effects of melting polar ice sheets found that global sea levels have risen at least six meters, or about 20 feet, above present levels on multiple occasions over the past three million years.

A new study by scientists at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, and the University of California, Irvine, shows that while ice sheets and glaciers continue to melt, changes in weather and climate over the past decade have caused Earth's continents to soak up and store an extra 3.2 trillion tons of water in soils, lakes and underground aquifers, temporarily slowing the rate of sea level rise by about 20 percent.

Between 2007 and 2011, the Greenland Ice Sheet lost about 260 billion tons of ice per year, mostly due to meIce Sheet lost about 260 billion tons of ice per year, mostly due to meice per year, mostly due to melt.

However, it's quite a different matter melting a long - lived massive ice sheet up to 1.5 km thick that covers over 70 % of the land surface (as happened at the end of the last glacial period), from melting isolated and much thinner ice caps / sheets that only cover about 11 % of the land surface (i.e. present - day).»

But the IPCC specifically excluded the mechanism able to produce the biggest amounts of water quickly - acceleration in the flow of ice from the Greenland and Antarctic ice sheets, the world's two major ice masses that would between them raise sea levels by about 70m if they completely melted.

But public awareness of the urgency of the climate challenge remains low even as journalists report more deeply about how global warming will alter our cities and environment and how we'll have to adapt to those changes as wildfires rage, ice sheets melt and seas rise.

One more point: Isn't it possible that salinity levels, in particular, are different now in the ESAS than they were about 8000 years ago in the HCO, not long after most of the ice age ice sheet melted?

You should call some Floridians or Louisianans and ask them: would you care if melting ice on Greenland or West Antarctica submerges more than half of your state even if it wouldn't occur for another 100 to 1,000 years (there's a lot we don't know about ice sheet dynamics).

People go about «business - as - usual» because they literately don't live on the coast, have never been to New Orleans or Venice, and can not see the DIRECT affects of the ice sheets melting in their EVERYDAY and present lives.

One of the things about ice melting (and this goes for dynamic ice sheet effects as well) is that melt / loss rates increase more than linearly with temperature.

Maybe this will put to rest the scenario of melting glaciers sliding into the sea and inundating Bangladesh, but I guess there's still the West Antarctic Ice Sheet to fantasize about.

DR PETER COX: «If we don't do anything by about twenty thirty we could have a global warming of exceeding two degrees, and at that point it's believed the Greenland ice sheet would start to melt in a way that you wouldn't be able to stop it once it started it, it would melt.

2:10 p.m. Updated Lora Koenig of NASA just sent this note providing the reference underlying her comment about past summer melting episodes at the summit (the spot on the giant ice sheet least vulnerable to melting):

As for melting continental ice sheets, yes, that would increase the Earth's moment of inertia about its axis of rotation, leading to a slight increase in length of day.

I agree that most people will not fully understand the implications of this, because most don't know diddly about Hadley cells, Ferrel cells, the Polar cell, albedo, latent or sensible heat, and mechanisms by which solar energy can be transported from the Arctic to melt more of the Greenland ice sheet.

Can anything be inferred about what changes to the AMOC intensity do to the melt - rate of the Greenland Ice sheet?

The Greenland ice sheet receives on average about 3 feet of snow per year, and most of it never sees any melting.

Significant contribution of insolation to Eemian melting of the Greenland ice sheet for an in - depth discussion about these differences.

As you might expect in a debate about whether or not the U.S. should make a risky move to perpetuate the use of fossil fuels, some committee members took the opportunity to voice doubt that the constant burning of that energy source was behind the rising temperatures, melting ice sheets, and abnormal weather events most scientists associate with climate change.

Revelle (1983); similarly Thomas et al. (1979); Bentley (1980) saw a possible ice sheet collapse in the next 500 years; but Bentley (1982) said melting could take thousands of years; this was disputed by Hughes (1982); Hollin (1980) tried to demonstrate an East Antarctic ice sheet surge about 95,000 years ago; for predictions of meter - scale rises, see Jones and Henderson - Sellers (1990), pp. 10 - 11, 15; a skeptic: Van der Veen (1985); Van der Veen (1988).

At the other end of the earth, the 2 - kilometer - thick Antarctic ice sheet, which covers a continent about twice the size of Australia and contains 70 percent of the world's fresh water, is also beginning to melt.

There is still some discussion about how exactly this starts and ends ice ages, but many studies suggest that the amount of summer sunshine on northern continents is crucial: if it drops below a critical value, snow from the past winter does not melt away in summer and an ice sheet starts to grow as more and more snow accumulates.

If the melting rate continues to stay within those two points, and given that the current contribution to sea level from the Greenland Ice Sheet is only about 0.1 mm / year, we won't see a lot of sea level rise until later this century.

-- Susan Solomon, Nature The Long Thaw is written for anyone who wishes to know what cutting - edge science tells us about the modern issue of global warming and its effects on the pathways of atmospheric chemistry, as well as global and regional temperatures, rainfall, sea level, Arctic sea - ice coverage, melting of the continental ice sheets, cyclonic storm frequency and intensity and ocean acidification.

The melting of Greenland's ice sheet appears to be accelerating of late, losing about four times as much mass last year as it did a decade ago.

The public has been misled by climate change advocates about the real reason behind the melting of Antarctica's western ice sheet, claims the website American News.

The melt - off from the world's ice sheets, ice caps and glaciers over eight years of the past decade would have been enough to cover the United States in about 18 inches (46 centimeters) of water, according to new research based on the most - comprehensive analysis of satellite data yet.

A significant portion of the Greenland ice sheet — which contains enough water to raise the worldwide sea level by about 23 feet (about 7 meters)-- would also melt.

The ice sheet — land ice — that covers most of Antarctica is melting at the rate of about 159 billion tons every year in recent years.

Simulating the variation of the ice sheet's albedo using a regional climate model — Modèle Atmosphérique Régionale (MAR), which some members of the team helped develop — indicated that increasing temperatures and melting accompanied by snow grain growth and greater bare ice exposure account for about half the decline, the scientists report.

«If you mention sea level rise to some people, they think about the ice sheets melting and dumping water into the ocean,» said climatologist Glenn Milne of the University of Ottawa in Canada, who was not involved in the research.

In fact, 2005 looks to feature the greatest amount of melting of the edge of the ice sheet in Greenland in about 30 years (or more):

Endless stories about glaciers melting, polar bears, ice sheets in Greenland and Antarctica and sea ice form the view that there is virtually no ice left on the surface of the planet.

(04/01/2013) Warming about twice as fast as the rest of the world, the Arctic is already undergoing massive upheavals from climate change: summer sea ice is thinning and vanishing, land based ice sheets are melting, and sea levels are rising.

«When I talk to people who don't really know about polar science, they look at that picture of Greenland covered in red, and they think the whole ice sheet is melting», says Brandon.

At the end of the day, the discussion about a single calendar year obscures the more important long - term trend of warming air temperatures, warming and acidifying oceans along with melting ice sheets, all of which are hallmarks of manmade global warming.

If all of Totten were to melt, it would be enough to raise seas by around 11 to 13 feet — or about as much as if half of the entire Greenland Ice Sheet went down.

Since to me (and many scientists, although some wanted a lot more corroborative evidence, which they've also gotten) it makes absolutely no sense to presume that the earth would just go about its merry way and keep the climate nice and relatively stable for us (though this rare actual climate scientist pseudo skeptic seems to think it would, based upon some non scientific belief — see second half of this piece), when the earth changes climate easily as it is, climate is ultimately an expression of energy, it is stabilized (right now) by the oceans and ice sheets, and increasing the number of long term thermal radiation / heat energy absorbing and re radiating molecules to levels not seen on earth in several million years would add an enormous influx of energy to the lower atmosphere earth system, which would mildly warm the air and increasingly transfer energy to the earth over time, which in turn would start to alter those stabilizing systems (and which, with increasing ocean energy retention and accelerating polar ice sheet melting at both ends of the globe, is exactly what we've been seeing) and start to reinforce the same process until a new stases would be reached well after the atmospheric levels of ghg has stabilized.