concluded from magnetic satellite measurements that the heat fluxes below the ice are anything but uniformal and (should) have a major effect
on ice modelling in the future.
Data were analyzed by Hughes (1973); Weertman (1974), «entirely possible,» p. 3; the classic theory was Thomas (1973a); and Thomas (1973b); Flohn (1974) gave a more general model;
on ice modeling, see also Hughes (1977).
Not exact matches
The
Ice Bucket Challenge, however, may have just thrown cold water
on that
model.
British
model Anara Atanes did the ALS
Ice Bucket Challenge
on Saturday after being nominated by her boyfriend, Manchester City midfielder Samir Nasri.
Alice Goodwin, the glamour
model wife of former Stoke City, Liverpool and Arsenal winger Jermaine Pennant, did the
Ice Bucket Challenge
on Wednesday.
-- Fly a kite — Make mud pies — Create clay
models — Make
ice pops using fresh fruit juice — Roll down a hill — Have a scooting race — Embrace the loom bands — Draw
on pavements in chalk — Go rock pooling
Radar measurements and
models of Earthly glacial
ice flows led researchers to conclude that the glaciers spotted
on Mars from orbiters contain nearly 150 billion cubic meters of water.
What we find with Webb will help inform our
models and allow us to understand the mechanisms for
ice formation at very low temperatures,» explained Karin Öberg of the Harvard - Smithsonian Center for Astrophysics, an investigator
on the project.
Heavier
models tend to have larger screens and more features but are better for installing
on a motorboat than toting with you across the
ice or out to a hidden lake.
Due to the real «go
on ice» researchers receive the unique scientific data, which is then used in construction of mathematical
models among them are integral characteristics of the processes (the diameter and depth of explosive lanes, etc.).
When the researchers
modeled the impacts of these altered winds
on Antarctica they found that they could drive warming of up to 1 °C of the waters at the depth of floating
ice shelves along the Western Antarctica Peninsula.
Professor Gavin Foster, from the University of Southampton, said: «The Intergovernmental Panel
on Climate Change have shown that climate
models can successfully simulate climates from the freezing world of the last
Ice Age, to the intense warmth of the «Eocene greenhouse», 50 million years ago.
Dr Hogg, an ESA Research Fellow in the Centre for Polar Observation and
Modelling (CPOM) at Leeds said: «The satellite images reveal a lot of continuing action
on Larsen - C
Ice Shelf.
Materials scientists hope their computer
model results will spark further research into the effects of carbon dioxide
on fracturing in glaciers and
ice sheets
This allowed them to calculate the redistribution of mass
on Earth's surface due to the melting of the Greenland and Antarctic
ice sheets and mountain glaciers, and
model the shift in Earth's axis.
Over the current century, the
model projects that the average albedo for the entire
ice sheet will fall by as much as 8 percent, and by as much 10 percent
on the western edge, where the
ice is darkest today.
Modeling studies
on geoengineering to reflect sunlight away from the Earth suggest that modifying the planet's reflectivity could slow the meltdown of the Greenland
ice sheet in the short term, but not stop it entirely, and could still allow an eventual total meltdown in the next millennia or so.
«From computer
models, we knew that the bedrock should rebound as the weight of
ice on top of it goes away,» Wilson said.
Using computer
modeling to interpret images from NASA's Galileo satellite, Pappalardo and Barr demonstrated that acnelike markings
on Europa's surface are probably bits of
ice containing minerals such as chloride salts and sulfuric acid, which lower the melting point so the material can rise from deep below.
Untersee is a good
model for Mars, he says, because it is supplied by subglacial melt — water that accumulates at the bottom of an
ice pile — rather than from surface melting, which does not occur
on Mars.
On the basis of physical factors, it is claimed that these
models can be used to predict when and where the
ice may collapse.
New research by UM bioclimatology Assistant Professor Ashley Ballantyne
models the influence of Arctic sea
ice on Arctic temperatures during the Pliocene era.
Scambos's group predicted the final Larsen B collapse using a
model that looks at how much meltwater has pooled
on the surface of the
ice, and he now hopes to apply the
model to bigger Antarctic
ice shelves.
With the help of a fictional guide dubbed John Lubbock,
modeled after a Victorian naturalist who wrote a popular book called Prehistoric Times, Mithen embarks
on a vivid tour of the warming world as it emerged from the last
ice age.
«When we look forward several decades, climate
models predict such profound loss of Arctic sea
ice that there's little doubt this will negatively affect polar bears throughout much of their range, because of their critical dependence
on sea
ice,» said Kristin Laidre, a researcher at the University of Washington's Polar Science Center in Seattle and co-author of a study
on projections of the global polar bear population.
The international team of co-authors, led by Peter Clark of Oregon State University, generated new scenarios for temperature rise, glacial melting, sea - level rise and coastal flooding based
on state - of - the - art climate and
ice sheet
models.
Coastal sea
ice formation takes place
on relatively small scales, however, and is not captured well in global climate
models, according to scientists at the University of California, Santa Cruz, who conducted the study.
Blankenship told her that although he agreed
on the basics of Pappalardo's
model, he did not think that the warm blobs of
ice would make it all the way to Europa's surface.
And when we understand the physics, we can develop better
models to simulate and predict when and how
ice will build up
on cold days.»
Iowa State's Hui Hu examines
ice on a test
model taken from the university's
Icing Research Tunnel.
But most of all, she wanted to know whether Pappalardo's
model of Europa's
ice sheet jibed with all he had learned from almost 30 years of studying
ice on Earth.
Most important, it relies
on the first published results from the latest generation of so - called Earth System climate
models, complex programs that run
on supercomputers and seek to simulate the planet's oceans, land,
ice, and atmosphere.
Their paper, published in Physics of Fluids, from AIP Publishing, provides a
model for four stages of
ice formation
on aircraft wings.
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 researchers» forecasts are based
on the AWI's BRIOS (Bremerhaven Regional
Ice - Ocean Simulations) model, a coupled ice - ocean model that the team forced with atmospheric data from the SRES - A1B climate scenario, created at Britain's Met Office Hadley Centre in Exet
Ice - Ocean Simulations)
model, a coupled
ice - ocean model that the team forced with atmospheric data from the SRES - A1B climate scenario, created at Britain's Met Office Hadley Centre in Exet
ice - ocean
model that the team forced with atmospheric data from the SRES - A1B climate scenario, created at Britain's Met Office Hadley Centre in Exeter.
Moon describes the many ways researchers study glacier dynamics, from in - place measurements
on the
ice to satellite - based monitoring campaigns to
models.
Many older
models of Greenland assumed that its massive
ice sheet sat
on bedrock that was relatively flat, even though scientists did not know the full thickness of the
ice.
Using the sophisticated UK Met Office climate
model, Dr Screen conducted computer experiments to study the effects of Arctic sea -
ice loss
on the NAO and
on Northern European winter temperatures.
Weaver's
models also demonstrate that once the temperature in the dust cloud reaches about — 280ºF, most of the molecules evaporate from the
ice on dust grains and enter a gas phase, allowing them to react a lot more quickly and to form complex molecules.
However, the Intergovernmental Panel
on Climate Change warned in its latest report that this could be an underestimate, because the computer
models used may not be able to predict rapid changes in Antarctica's
ice.
Climate change
models predict that the Arctic sea
ice will continue to shrink in a warming world (as much as 40 % of the
ice is expected to be gone by midcentury), and the resulting changes — including later formation of
ice in the autumn, rain falling
on the snow, and decreasing snow depths — will make it increasingly difficult for the seals to construct their snow caves, NOAA says.
«If we could grow icicles
on the computer, in a physical way, then we can create virtual
models of chasms, caves,
ice storms, shut - down airports and so
on in days instead of months,» says Batty's colleague Eitan Grinspun.
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 Greenla
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 Greenla
Ice Sheet are thawed to improvements in snowfall accumulation
models for all of Greenland.
However, the details of the process in
ice aren't very well understood, and
modeling studies that try to capture those dynamics
on Europa had yielded some puzzling results, the researchers say.
Combining the speed and thickness measurements allowed the scientists to determine how much
ice was flowing into the ocean, while the climate
model allowed them to estimate how much snow was falling
on the
ice sheet.
As
models improved, the Fifth Assessment Report, released in 2013, was able to provide numerical estimates of future
ice loss but still based
on the informal judgment of a limited number of participants.
In this
model of Titan, however, the roots extending below the
ice sheet are so much bigger than the bumps
on the surface that their buoyancy is pushing them up against the
ice sheet.
Even a small change in temperature or humidity can radically alter the shape and size of a snowflake, making it notoriously difficult to
model these
ice crystals
on a computer.
In examining the ultimate transdisciplinary issue, humanity's evolving two - way relationship with the climate, I've had the rare privilege of studying the whole picture, from the climate
models running
on supercomputers in Boulder in 1985 to the burning rain forests of the western Amazon in 1989 to the shifting sea
ice around the North Pole in 2003 to the contentious climate treaty talks in one city after another.
The other relies
on sophisticated computer
models to predict the future melting of Thwaites Glacier, the biggest of West Antarctica's frozen
ice rivers.