Sentences with phrase «ice sheet modeling studies»

It suggests that current ice sheet modeling studies are too simplistic to accurately predict the future contributions of the entire Greenland Ice Sheet to sea level rise, and that Greenland may lose ice more rapidly in the near future than previously thought.

Not exact matches

«The widespread loss of Antarctic ice shelves, driven by a warming ocean or warming atmosphere, could spell disaster for our coastlines — and there is sound geological evidence that supports what the models are telling us,» said Robert M. DeConto of the University of Massachusetts Amherst, a co-author of the study and one of the developers of the ice - sheet model used.

Recent modelling by researchers from the Potsdam Institute for Climate Impact Research in Germany, as well as studies of past climate, suggest that the planet will soon have warmed enough to melt Greenland's ice sheet entirely — if it hasn't already become warm enough.

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.

«Prior to this study, a good ice - sheet model was one that got its present thickness and surface speed right.

The paper also describes an atmosphere - ocean modeling study of feedback loops caused by ice sheet melting under 2 °C conditions.

Comparing this age volume to simple computer models helped the study's team better understand the ice sheet's history.

By combining satellite images of the ice sheet and wind stress data from observations and computer modeling, Greene and his collaborators were able to study the chain of events that brings the warm water to Totten.

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.

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.

Dr Ian Joughin at the University of Washington, author of a recent study simulating future Antarctic ice sheet losses added: «This study does a nice job of revealing the strong thinning along the Amundsen Coast, which is consistent with theory and models indicating this region is in the early stages of collapse.»

In the study, researchers analyzed a series of transient Coupled General Circulation Model simulations forced by changes in greenhouse gases, orbital forcing, meltwater discharge and the ice - sheet history throughout the past 21,000 years.

A 3 - D model for the Antarctic ice sheet: a sensitivity study on the glacial - interglacial contrast.

Diagnostic modelling can be used to improve the understanding of the processes controlling the behaviour of a particular ice stream, or to study the importance of one or more physical process in an ice sheet in general.

A new study combines the latest observations with an ice sheet model to estimate that melting ice on the Antarctic ice sheet is likely to add 10 cm to global sea levels by 2100, but it could be as much as 30 cm.

One recent modeling study focused on this mode of instability estimated that the Antarctic ice sheet has a 1 - in - 20 chance of contributing about 30 centimeters (1.0 feet) to global average sea - level rise over the course of this century and 72 centimeters (2.4 feet) by the end of the next century.

Most modelling studies of this period do not treat ice sheet extent and elevation or CO2 concentration prognostically, but specify them as boundary conditions.

Model studies for climate change between the Holocene and the Pliocene, when Earth was about 3 °C warmer, find that slow feedbacks due to changes of ice sheets and vegetation cover amplified the fast feedback climate response by 30 — 50 % [216].

«These are two of the largest and most rapidly changing glaciers in Antarctica, so the potential for their evolution to influence each other is important to consider in modeling ice sheet behavior and projecting future sea level rise,» Dustin Schroeder, a Stanford geophysicist who led the study, told Earther.

Are there any studies done to model a worst case ice sheet collapse, such as WAIS collapse causing a mega tsunami?

But what the GSL now says is that geological evidence from palaeoclimatology (studies of past climate change) suggests that if longer - term factors are taken into account, such as the decay of large ice sheets, the Earth's sensitivity to a doubling of CO2 could itself be double that predicted by most climate models.

• Current global model studies project that the Antarctic ice sheet will remain too cold for widespread surface melting and is expected to gain in mass due to increased snowfall.

If all of the currently available carbon resources — estimated to be around 10,000 gigatons — were burned, the Antarctic Ice Sheet would melt entirely and trigger a global sea - level rise of more than 50 meters, a new long - term modeling study suggests.

In addition we have coupled the ice model Sicopolis to our Earth System model CLIMBER - 2 to study the stability of the Greenland ice sheet in past and future climate changes.

A 2012 study (Shepherd et al. 2012) combined satellite altimetry, interferometry, and gravimetry data from the same regions, time spans, and models to examine ice sheet balance.

Through a combination of sediment cores analyses and ice - sheet modelling, the study shows that this area has probably been steadily leaking methane from hydrates for 8000 years.

A new international study is the first to use a high - resolution, large - scale computer model to estimate how much ice the West Antarctic Ice Sheet could lose over the next couple of centuries, and how much that could add to sea - level riice the West Antarctic Ice Sheet could lose over the next couple of centuries, and how much that could add to sea - level riIce Sheet could lose over the next couple of centuries, and how much that could add to sea - level rise.

In the new study, Csatho's team found areas of rapid shrinkage in southeast Greenland that current climate models don't address, which suggests the ice sheet may lose ice more rapidly in the near future than previously thought.

Arctic air temperatures are increasing at twice the rate of the rest of the world — a study by the U. S. Navy says that the Arctic could lose its summer sea ice by next year, eighty - four years ahead of the models — and evidence little more than a year old suggests the West Antarctic Ice Sheet is doomed, which will add between twenty and twenty - five feet to ocean leveice by next year, eighty - four years ahead of the models — and evidence little more than a year old suggests the West Antarctic Ice Sheet is doomed, which will add between twenty and twenty - five feet to ocean leveIce Sheet is doomed, which will add between twenty and twenty - five feet to ocean levels.

A new study published in Geophysical Research Letters has organized a Model Intercomparison Project (AMOCMIP) in order to realistically consider Greenland Ice Sheet melting in state - of - the - science global climate model projectModel Intercomparison Project (AMOCMIP) in order to realistically consider Greenland Ice Sheet melting in state - of - the - science global climate model projectmodel projections.

The new study, accordingly, uses a computer model of Antarctica to study the consequences of adding huge volumes of salt water to different portions of the ice sheet.

Pfeiffer, M. & Lohmann, G. Greenland ice sheet influence on last interglacial climate: global sensitivity studies performed with an atmosphere — ocean general circulation model.

Computer models suggest that just small amounts of melting in the coming decades could destabilize the entire ice sheet on the western part of the frozen continent, researchers at the Potsdam Institute for Climate Impact Research in Germany say in a new study.

Such models also indicate that warming would initially cause the Antarctic ice sheet as a whole to gain mass owing to an increased accumulation of snowfall (*; some recent studies find no significant continent - wide trends in accumulation over the past several decades; Lemke et al., 2007 Section 4.6.3.1).

For example, a recent ice sheet model sensitivity study finds that incorporating the physical processes of hydrofracturing of ice and ice cliff failure increases their calculated sea level rise from 2 meters to 17 meters and reduces the potential time for West Antarctic collapse to decadal time scales.

Model studies for climate change between the Holocene and the Pliocene, when Earth was about 3 °C warmer, find that slow feedbacks due to changes of ice sheets and vegetation cover amplified the fast feedback climate response by 30 — 50 % [216].

The study's major achievement is the addition of two key ice melting processes left out of all Antarctica - wide models to this point: Meltwater ponding and crevasse formation on the surface of ice sheets — so called «hydrofracturing» — and the tendency of ice sheets that are grounded on marine bedrock to rapidly retreat.

Furthermore, IPCC just as clearly states «Current global model studies project that the Antarctic ice sheet will remain too cold for widespread surface melting and is expected to gain in mass due to increased snowfall.»

For their study, Hansen and his colleagues combined ancient paleo - climate data with new satellite readings and an improved model of the climate system to demonstrate that ice sheets can melt at a «non-linear» rate: rather than an incremental melting as Earth's poles inexorably warm, ice sheets might melt at exponential rates, shedding dangerous amounts of mass in a matter of decades, not millennia.

Geological evidence from studies of past climate change now suggests that if longer term factors are taken into account, such as the decay of large ice sheets and the operation of the full carbon cycle, the sensitivity of the Earth to a doubling of CO2 could be double that predicted by most climate models.

Monday, January 27, 6:30 - 8 pm, Howe Library, Mayer Room, 13 South St., Hanover Thin Ice, the movie Continuing the Sierra Club's focus on climate change, this film features researchers on four continents and the ocean as they studied the changes in the atmosphere, oceans and ice sheets through measurements (from instruments, satellites, ice and rock) and computer modeliIce, the movie Continuing the Sierra Club's focus on climate change, this film features researchers on four continents and the ocean as they studied the changes in the atmosphere, oceans and ice sheets through measurements (from instruments, satellites, ice and rock) and computer modeliice sheets through measurements (from instruments, satellites, ice and rock) and computer modeliice and rock) and computer modeling.

Most modelling studies of this period do not treat ice sheet extent and elevation or CO2 concentration prognostically, but specify them as boundary conditions.

One recent modeling study focused on this mode of instability estimated that the Antarctic ice sheet has a 1 - in - 20 chance of contributing about 30 centimeters (1.0 feet) to global average sea - level rise over the course of this century and 72 centimeters (2.4 feet) by the end of the next century.

For example, I'm using ocean models to study how the Southern Ocean might melt the Antarctic Ice Sheet from the bottom up.

Trenberth objected in particular to the climate modeling scenarios used to study freshwater injection as ice sheets melt.

The glaciers and ice caps / sheets ECV is of importance to climate models and albedo, water balance, sea level, and radiation budget climate studies.

But one modeling study put the threshold level for the eventual near - complete loss of Greenland's ice sheet at a local warming of just 2.7 C — which, due to Arctic amplification, means a global warming of only 1.2 C. Total melting of Greenland — luckily, something that would likely take centuries — would raise sea levels by 7 meters, submerging Miami and most of Manhattan, as well as large chunks of London, Shanghai, Bangkok and Mumbai.

Currently, «even the best models out there disagree on cloudiness over Greenland and its effect on the ice sheet,» said the new study's lead author, Kristof Van Tricht of the University of Leuven in Belgium, in an email to The Post.