Sentences with phrase «less ice sheet»

(That is, if we simply held global mean temperature constant by injecting aerosols into the stratosphere, I have no idea whether that would be enough to halt Antarctic ice loss — probably not, in fact almost certainly not, though it would mean less ice sheet loss than would occur if we didn't do it.»

Thus, in the former domain one can find less ice sheet cover than in last year, but the latter is fully covered with ice.

Not exact matches

Further, the less time an ice sheet has to create new layers of ice each winter, the less strong ice is created and built into centuries of previous strong sea ice, leaving ever more vulnerable and easy - to - melt sea ice.

Increased atmospheric heat obviously makes temperatures warmer, which leaves less time for ice to form and solidify and create new layers on glaciers and ice sheets.

The findings indicate the ice sheets are less stable than previously thought, and could be strongly affected by climate change.

But new analyses like this, which show previously undiscovered deep canyons, suggest that a good chunk of East Antarctica's bed lies below sea level, rendering the ice sheet less stable than previously thought.

But in the Totten and Moscow University ice shelves over on the eastern half of the ice sheet, the story was far less clear, Paolo says.

The result is less water sloshing around the sheet's base, so the ice will last longer.

Later records show those conditions shifted in 2013 - 2014 to favor less melting, but the damage was already done — the ice sheet had become more sensitive.

Researchers previously used MRO's Shallow Radar (SHARAD) to map extensive underground water - ice sheets in middle latitudes of Mars and estimate that the top of the ice is less than about 10 yards beneath the ground surface.

Thus, less moisture is trapped in ice sheets, then more is found in liquid form.

During that time, temperatures were less than 1 °C warmer than they are today, but sea level stood about 5 to 9 meters higher due to large - scale ice sheet melt.

These ice - adapted algae are typically brownish - grey, less visibly dramatic than the red and green blooms but just as important for darkening the ice sheet.

If Sugden is correct, the Antarctic ice sheet is less vulnerable to warming than some scientists have supposed.

But because the surrounding ocean would have been warmer, and stabilizing sea ice less abundant, the massive East Antarctic ice sheet may have contributed to higher sea levels by flowing more quickly towards the ocean.

Less than a year after the first research flight kicked off NASA's Oceans Melting Greenland campaign, data from the new program are providing a dramatic increase in knowledge of how Greenland's ice sheet is melting from below.

Ullman said the level of CO2 that helped trigger the melting of the Laurentide ice sheet was near the top of pre-industrial measurements — though much less than it is today.

The argument is that the increased separation of the Antarctic land mass from South America led to the creation of the powerful Antarctic Circumpolar Current which acted as a kind of water barrier and effectively blocked the warmer, less salty waters from the North Atlantic and Central Pacific from moving southwards towards the Antarctic land mass leading to the isolation of the Antarctic land mass and lowered temperatures which allowed the ice sheets to form.

Of course, our study looks back in time and the future will be a very different place in terms of ice sheets and CO2 but it remains to be seen whether or not Earth's climate becomes more or less stable as we move forward from here.»

The East Antarctic ice sheet has long been considered relatively stable because most of the ice sheet was thought to rest on bedrock above sea level, making it less susceptible to changes in climate.

Fortunately, the ice sheet over Greenland is much smaller than the ice sheet during the Ice Age and thus with less potential to seriously disturb the systice sheet over Greenland is much smaller than the ice sheet during the Ice Age and thus with less potential to seriously disturb the systice sheet during the Ice Age and thus with less potential to seriously disturb the systIce Age and thus with less potential to seriously disturb the system.

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.

In the same issue of the journal Science, other scientists reported on research from the opposite end of the world, observing that water around the south pole has become less salty, owing to the melting of the West Antarctic ice sheet.

A report from the Intergovernmental Panel on Climate Change last year found that between 1993 and 2010, the Greenland ice sheet contributed less than 10 percent to global sea - level rise.

Of course, those numbers are the product of many assumptions, including partial collapse of the Antarctic ice sheet, and they are less reliable the further out they go.

The warming of the WAIS is most worrisome (at least for this century) because it's going to disintegrate long before the East Antarctic Ice Sheet does «'' since WAIS appears to be melting from underneath (i.e. the water is warming, too), and since, as I wrote in the «high water» part of my book, the WAIS is inherently less stable:

Today the only place we have massive ice sheets is in the East Antarctic and to a lesser extent the West Antarctic, but now the world is twice as hot.

What is alarming is that the volume of water and the extent and rapidity of its movement is suprisingly much greater than previously believed, and that a possible, perhaps likely, effect of this on ice sheet dynamics is to make the ice sheets less stable and more likely to respond more quickly to global warming than previously expected.

This melt is the primary control on Antarctic ice - sheet loss, as the thinner ice shelves are less able to buttress ice in the interior, leading to faster ice flow.

In northern latitudes the reverse is happening — land is rising after being liberated from the mass of the ice sheets, again normally by less than 1mm / yr, but in places over 5mm / yr (Peltier et al. 2015).

If an ice sheet were ablated down to bare ground, less light from the sun would be reflected back into space and more would be absorbed by the land.

LONDON — Part of the East Antarctic ice sheet may be less stable than anyone had realized, researchers based in Germany have found.

«What the situation suggests for Greenland ice melt summer 2016 is some thermal erosion of the «cold content» of the snow overlying the ice sheet, meaning less heat needed to «ripen'the snow to the melting point,» Box said.

Right now, the ice sheet's surface has about 1.2 times the amount of mass than normal; at the same point in 2012, it had 1.2 times less than normal, Box said.

At 104 square miles, Glacier Grey forms less than three percent of the 4,773 - square - mile sheet of ice stretching across southern Chile and Argentina.

This left less water in the oceans since large amounts were tied up in glaciers and ice sheets, and sea level fell.

Today the only place we have massive ice sheets is in the East Antarctic and to a lesser extent the West Antarctic, but now the world is twice as hot.

It could be that ice sheets, through dynamical behavior, are not on a 3000 year clock that straight melting implies but rather respond with much less delay to warming.

Ice - sheet responses to decadal - scale ocean forcing appear to be less important, possibly indicating that the future response of the Antarctic Ice Sheet will be governed more by long - term anthropogenic warming combined with multi-centennial natural variability than by annual or decadal climate oscillations.&rsheet responses to decadal - scale ocean forcing appear to be less important, possibly indicating that the future response of the Antarctic Ice Sheet will be governed more by long - term anthropogenic warming combined with multi-centennial natural variability than by annual or decadal climate oscillations.&rSheet will be governed more by long - term anthropogenic warming combined with multi-centennial natural variability than by annual or decadal climate oscillations.»

Re # 1: Timothy, if I'm reading Hansen correctly that extra 3C is more or less a one - time pulse associated with ice sheet melt; IOW sensitivity returns to 3C after they're gone.

Orbital forcing causes ice ages or ends them by redistributing incoming solar radiation over seasons and latitudes so that ice sheet growth or decay is more or less favorable on a regional basis, with a resulting global average albedo feedback.)

If I may add one more speculative question: are the portions of glacial sheets formed during periods of high ice flux less stable, and more prone to calving, than those formed during slow flux?

We have a pretty good idea that the Heinrich events, with the most prominent bipolar seesaw behavior, are linked to ice - sheet behavior, but we're less confident about the non-Heinrich cold phases of the D / O oscillations (the cold phases do have more ice - rafted debris in these non-Heinrich cold - phases than in warm phases, but is that an ice - dynamical signal, a survival - of - icebergs signal, or something else?).

It was said above that the ocean is warming just like the land (& air and ice sheets / glaciers), that the heat in the ocean dwarfs that in the land and air, that the warming is due to the net solar imbalance (solar in, less LW out - no mention of CO2.)

In the couple of decades leading up to the most recent IPCC report, the ice sheets were losing slightly less than 0.001 % of their mass per year, a rate that would require more than 100,000 years to remove all of the ice, and the equivalent of me going on a diet for a year and losing about 1/3 of one potato chip.

Combined climate / ice sheet model estimates in which the Greenland surface temperature was as high during the Eemian as indicated by the NEEM ice core record suggest that loss of less than about 1 m sea level equivalent is very unlikely (e.g. Robinson et al. (2011).

That indicates the Greenland ice sheet may have contributed less than half of the total sea rise at the time.

A related alternative metaphor, perhaps less objectionable while still making the most basic point, comes to mind in connection with an image of crashing of massive ice sheets fronts into the sea — an image of relevance to both climate tipping points and consequences (sea level rise).

This will move up through some big numbers (possibly approaching half a metre a year at worst) as the ice sheets fall to bits, then the annual rate will slacken again as less ice is left to melt.

That aside, less summer ice will mean a lot more heat gain throughout the Arctic, with dorect local implications for the permafrost, the Greenland ice sheet and (worst case) the East Siberian Shelf shallow clathrates.