Sentences with phrase «of ice sheet dynamics»

The inertia of ice sheet dynamics is the third.

What is new, and newsworthy, is that the extensive system of liquid water under the ice may provide a better understanding of ice sheet dynamics:

WRT our current discussion of ice sheet dynamics, the latest IPCC report actually has * less * to offer in terms of icesheet change predictions precisely because there have been so many new findings and such dramatic changes in just the last few years.

Glacials and interglacials are the result largely of ice sheet dynamics.

As I said, we don't have a good understanding of the ice sheet dynamics, and what you say is plausible at first sight.

Recent evidence (e.g. as reviewed by us a few months back) suggests that the demise of large parts of the major ice sheets could potentially take place far faster — on timescales of perhaps several centuries — due to the influence of ice sheet dynamics.

And it is inspiring to see such progress being made in the detail with which models of ice sheet dynamics and other forms of change can be applied to the moderately far future.

Chuck Booth wrote: «The existence of lakes beneath Antarctic ice is nothing new — this has been known for decades... What is new, and newsworthy, is that the extensive system of liquid water under the ice may provide a better understanding of ice sheet dynamics»

What is new, and newsworthy, is that the extensive system of liquid water under the ice may provide a better understanding of ice sheet dynamics:

Not exact matches

The U.S. team is one of three international groups that sought to penetrate Antarctica's subglacial waters in the past month, seeking clues not only to glacial microbiology but also to ice sheet dynamics and the impact of climate change on the continent.

Rising sea levels are certain in a warming world, but there is still substantial uncertainty about the extent of the increase in this century, mainly because the dynamics that could erode the ice sheets of Greenland and Antarctica remain poorly understood.

«The strong impact of ocean onto Antarctic ice sheet dynamics, or the knowledge that we have about it, is reinforced by our study,» said lead study author Hannes Konrad of the University of Leeds in an interview with E&E News.

«The past behavior and dynamics of the Antarctic ice sheets are among the most important open questions in the scientific understanding of how the polar regions help to regulate global climate,» said Jennifer Burns, director of the NSF Antarctic Integrated Science System Program.

Because of internal ice - sheet dynamics, it has lost about 50 per...

The researchers used a range of data of other ice sheet dynamics, like snowfall and surface velocity of ice, to create a more detailed overview of Greenland's topography.

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.

Focus of Study I am a geophysicist interested in the dynamics of tectonic processes that cause earthquakes and build mountains and the geodynamics of solid earth - ice sheet interactions.

It's interesting to note that most of these elements include physics that modellers are least confident about — hydrology, ice sheets and vegetation dynamics.

Huybrechts, P., 2002: Sea - level changes at the LGM from ice - dynamics reconstructions of the Greenland and Antarctic ice sheets during the glacial cycles.

Dan, I know virtually nothing about ice sheet dynamics but even I can understand that, even assuming no lubrification or sliding at the base, lateral ice flow is not going to be caused by the weight of the ice at the center.

the idea of sea - level influence on ice sheet dynamics is not new, but as you indicate, references are not easily googleable.

Few AOGCMs include ice sheet dynamics; in all of the AOGCMs evaluated in this chapter and used in Chapter 10 for projecting climate change in the 21st century, the land ice cover is prescribed.

Currently, the major focus of this thread is on reconstructing past sea - level changes and understanding the implications of these changes for ice - sheet stability and for ocean dynamics.

The latter is almost linearly related to changes in ice sheet volume; the former, however, is influenced by a range of factors, including atmosphere / ocean dynamics and changes in Earth's gravitational field, rotation, and crustal and the mantle deformation associated with the redistribution of mass between land ice and the ocean.

If ice sheet disintegration reaches a point such that the dynamics and momentum of the process take over, at that point reducing greenhouse gases may be unable to prevent major ice sheet mass loss, sea level rise of many meters, and worldwide loss of coastal cities — a consequence that is irreversible for practical purposes.

The dynamics of large of sheets is of course a possible unknown, but no one has yet be able to come up with a * mechanism * for 5 m of sea level rise in 100 years given current ice sheet configurations.

I (and others) have been perplexed for years why so many in the ice sheet dynamics community have resorted to re-inventing the wheel (as a square) rather than avail themselves of this literature — it's not obscure.

But on the scale of decades to a century, the dynamics of ice sheets whose disintegration would determine that outcome remain beyond clear human understanding.

Among the ice sheet dynamics to fret about I see this change in the temperature of the ice from say -30 C to ice - at - 0C and the subsequent uptake of the heat to go from ice - at - 0C to water - at - 0C as the «dark matter» of the cryosphere.

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).

Chris Mooney has filed a nice Washington Post piece on ice sheet dynamics and several ways to visualize the most common unit of what's moving to the sea — gigatons (each a billion tons):

That said, I think the impact of this 50 - yr time scale warming on the dynamics of the West Antarctic ice sheet will manifest only in the distant future.

Chris Mooney has filed a nice Washington Post piece on ice sheet dynamics and several ways to visualize the most common unit of what's moving to the sea — gigatons (each a billion tons): Read more...

Further to Aaron's post in # 15, if the current generation of GCM's do not properly include ice sheet dynamics and interactions with the oceans etc, are not the pdf's and their moments compromised and if so to what extent?

There will be some clear failures where there are reasons to suspect that some of the (up to now) excluded physics is dominant (i.e. Heinrich events that rely on ice sheet dynamics), but pretty much everything else is fair game — as long of course there is a good hypothesis to test.

• Thorough understanding of the physics and dynamics of the Greenland and Antarctic ice sheets, with a view to predicting sea level rise within 20 % for a specified change in climate over the ice sheets....»

New research on the dynamics of Greenland's ice sheets complicates efforts to forecast sea level rise in this century, as the Green Blog reports.

Efforts to identify real nonlinear thresholds seem mired in uncertainty and incomplete characterization of things like ice - sheet dynamics.

These processes are still far from perfectly understood, because they require a representation of the fairly complicated rheology involved in ice sheet dynamics.

One persistent issue is the dynamics of ice sheets.

The biggest change is that ice sheet dynamics look more uncertain now than at the time of the TAR, which is why this uncertainty is not included any more in the cited range but discussed separately in the text.

The people giving presentations, who know ice as well as anyone, made a clear case not only that we have little understanding of ice dynamics, but that (as one of them put it) the main sources of uncertainty in the models are all in the direction of underestimation of the sensitivity of ice sheets to a temperature rise.

The models we have for ice sheet dynamics are quite new, and we have no way of testing them.

And the Hansen - size projections are the least certain of all (with irreducible uncertainty on relevant time scales, given the complexities of ice - sheet dynamics.)

but when you get around to looking at that interminable thread, you'll find that most of what people were arguing about wasn't in the territory of things like ice sheet dynamics where reasonable people could differ about the science.

With the IPCC previously «taking a pass», in its assessment of Greenland's contribution to sea - level rise - due to poor understanding of how ice sheets would respond to global warming back in 2007 - this new paper is an important first stab at pinning down the slippery mechanisms of «ice sheet dynamics».

Together with the University of Alaska, PIK develops the Parallel Ice Sheet Model (PISM), an innovative computer model of continental ice sheet dynamiIce Sheet Model (PISM), an innovative computer model of continental ice sheet dynaSheet Model (PISM), an innovative computer model of continental ice sheet dynamiice sheet dynasheet dynamics.

Prediction Continued improvements in modeling decadal - scale dynamics — and longer, when ice - sheet and deep - ocean dynamics are included — will continue to affirm the multi-decade arc of strong climate science that concludes «Hansen's worldview is right.»

Until now, though, most of the focus has been on ice sheet dynamics — how quickly Greenland's glaciers are flowing into the sea.

Marine sediment record from the East Antarctic margin reveals dynamics of ice sheet recession.