Sentences with phrase «ice modelling scientists»

For testing purposes - ie when the sea - ice modelling scientists are testing changes to their parametrisations - then you can't do runs like that.

Not exact matches

Murali Haran, a professor in the department of statistics at Penn State University; Won Chang, an assistant professor in the department of mathematical sciences at the University of Cincinnati; Klaus Keller, a professor in the department of geosciences and director of sustainable climate risk management at Penn State University; Rob Nicholas, a research associate at Earth and Environmental Systems Institute at Penn State University; and David Pollard, a senior scientist at Earth and Environmental Systems Institute at Penn State University detail how parameters and initial values drive an ice sheet model, whose output describes the behavior of the ice sheet through time.

The thermodynamic model developed by VTT Technical Research Centre of Finland research scientists shows that under certain conditions ice warms and melts when an item of material slides across its surface.

Ice friction was modelled by VTT's Principal Scientist Lasse Makkonen and Research Scientist Maria Tikanmäki.

Climate models may understate risks Previously, many scientists had believed that northeast Greenland was too cold to be a significant contributor to ice loss, said Khan.

Scientists have suggested that ice sheets covering the ocean, or a hydrogen - sulfide haze, might have protected nascent life, but attempts to model these conditions have given ambiguous results.

Scientists have already discovered enormous lakes deep under the ice, a result not predicted in any model.

Materials scientists hope their computer model results will spark further research into the effects of carbon dioxide on fracturing in glaciers and ice sheets

The scientists also ran a computer model to simulate the future of Greenland's surface temperature, grain size, exposed ice area and albedo.

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.

The more data scientists can gather about Antarctic sea ice, the more they can unpick why climate models struggle to accurately predict its extent.

The new model is the first to document and quantify this new feedback — one that is not accounted for in climate models, says Jason Box, an ice scientist at the Geological Survey of Denmark and Greenland in Copenhagen, who has documented rising impurities at a local scale during field campaigns.

Isaac Held, a National Oceanic and Atmospheric Administration climate scientist, said he agreed with the researchers about the «the importance of getting the ice - liquid ratio in mixed - phase clouds right,» but he doesn't agree that global climate models generally underestimate climate sensitivity.

But the models also suggest that the scheme could go too far: Adding excess sulfur could increase ice in Antarctica, «overcompensating» for warming, says Rasch, which could affect ecosystems and the global ocean - atmosphere system in a myriad of ways that scientists haven't studied.

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.

In order to predict future changes in climate, scientists verify and refine their models against paleoclimate data from the ice cores Taylor and others pull up.

The data that Old Weather volunteer citizen scientists meticulously transcribe from the logbooks are used to drive climate and sea ice models to help understand changes and improve predictions.

The consequences of global sea level rise could be even scarier than the worst - case scenarios predicted by the dominant climate models, which don't fully account for the fast breakup of ice sheets and glaciers, NASA scientists said today (Aug. 26) at a press briefing.

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.

«People have been talking about the possible link between winds and Antarctic sea ice expansion before, but I think this is the first study that confirms this link through a model experiment,» commented Axel Schweiger, a polar scientist at the UW Applied Physics Lab.

Scientists are involved in the evaluation of global - scale climate models, regional studies of the coupled atmosphere / ocean / ice systems, regional severe weather detection and prediction, measuring the local and global impact of the aerosols and pollutants, detecting lightning from space and the general development of remotely - sensed data bases.

To reach further back in time and provide a long - term record that can inform global climate models, scientists are turning to other means of measuring ice mass.

«It will add to what is already being done by other scientists on the Roi Baudouin Ice Shelf, will bring a new data set for models and will make a significant additional contribution to research activities at the Princess Elisabeth Antarctica Station».

They have tracked the rotten ice to a depth of nearly 3 feet below the surface — a finding that could help scientists who develop climate models to better understand how ice sheets are losing mass.

The authors compared recently constructed temperature data sets from Antarctica, based on data from ice cores and ground weather stations, to 20th century simulations from computer models used by scientists to simulate global climate.

How do you think climate scientists model and otherwise study past ice ages if they ignore their cause?

Here are some possible choices — in order of increasing sophistication: * All (or most) scientists agree (the principal Gore argument) * The 20th century is the warmest in 1000 years (the «hockeystick» argument) * Glaciers are melting, sea ice is shrinking, polar bears are in danger, etc * Correlation — both CO2 and temperature are increasing * Sea levels are rising * Models using both natural and human forcing accurately reproduce the detailed behavior of 20th century global temperature * Modeled and observed PATTERNS of temperature trends («fingerprints») of the past 30 years agree

«An ongoing US Department of Energy - backed research project led by a US Navy scientist predicts that the Arctic could lose its summer sea ice cover as early as 2016 — 84 years ahead of conventional model projections.»

A team of scientists from the National Snow and Ice Data Center and the National Center for Atmospheric Research, which has compiled data on Arctic Ocean summer ice melting from 1953 to 2006, concluded that the ice is melting much faster than climate models had predictIce Data Center and the National Center for Atmospheric Research, which has compiled data on Arctic Ocean summer ice melting from 1953 to 2006, concluded that the ice is melting much faster than climate models had predictice melting from 1953 to 2006, concluded that the ice is melting much faster than climate models had predictice is melting much faster than climate models had predicted.

While finishing up her dissertation at the National Center for Atmospheric Research (NCAR), Parkinson and climate scientist William Kellogg decided to take the theory about carbon dioxide emissions increasing global temperatures and apply it to a sea ice model that Parkinson had built.

In this study, scientists from Georgia Tech, the Chinese Academy of Sciences and Columbia University expanded on previous research by combining observational data and model simulations to explore the link between unusually large snowfall amounts in the Northern Hemisphere in recent winters and diminishing Arctic sea ice.

Evaluating ocean and atmospheric observations with advanced modeling tools, scientists from NOAA and CIRES found that about 60 percent of 2016's record warmth was caused by record - low sea ice observed that year, and the ensuing transfer of ocean heat to the atmosphere across wide expanses of ice - free or barely frozen Arctic Ocean.

This is starting to make the second graph (below) looking reasonable, and those scientists and models which have been suggesting an sea - ice - free summer Arctic within a decade to be on the money.

Scientists from the University of Erlangen - Nuremberg Institute of Geography and from the Laboratoire de Glaciologie et Gophysique de l'Environnement in Grenoble, France, used radar data from satellites such as ESA's Envisat and observations of ice thickness from airborne surveys in a complex model to demonstrate, for the first time, how the buttressing role of the ice shelves is being compromised as the shelves decline.

Very few of these people would call themselves climate scientists — they are a collection of people who study the ocean, air, past climate, numerical models, physics, ice, etc..

The US CLIVAR Greenland Ice Sheet - Ocean Interactions Working Group was formed to foster and promote interaction between the diverse oceanographic, glaciological, atmospheric and climate communities, including modelers and field and data scientists within each community, interested in glacier / ocean interactions around Greenland, to advance understanding of the process and ultimately improve its representation in climate models.

The SIO produces reports in June, July, and August containing a variety of perspectives on Arctic sea ice — from observations of current conditions, to advanced numerical models, to qualitative perspectives from citizen scientists.

To assure the model was realistic, the scientists drew on observations of changes in the altitude of the ice sheet surface made by NASA's IceSat satellite and airborne Operation IceBridge campaign.

They used the Ice Sheet System Model (ISSM), a numerical depiction of the physics of ice sheets developed by scientists at JPL and the University of California, IrviIce Sheet System Model (ISSM), a numerical depiction of the physics of ice sheets developed by scientists at JPL and the University of California, Irviice sheets developed by scientists at JPL and the University of California, Irvine.

«scientists have assumed» «The climate models assume» «assumption that Natural CO2 is totally fixed and unchanging» «if you assume a long lifetime for atmospheric CO2 ″ «falsification of the basic assumption» «it requires assumptions that violate empirical knowledge» «assumed so that the ice cores and modern measurements fit together» «arbitrary and unjustified assumption»

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.

To better understand how climate change will affect the Greenland ice sheet, scientists modeled the melting Laurentide ice sheet of 9000 years ago.

The new research finds that limiting warming to 1.5 C rather than 2C could «substantially» reduce the risk of ice - free conditions in the coming decades, says Prof Michael Sigmond, a research scientist at the Canadian Centre for Climate Modelling and Analysis at Environment Canada and lead author of one of the new studies.

«Using complex new modeling, the scientists have found that rapidly melting Arctic sea ice now threatens to diminish precipitation over California by as much as 15 percent within 20 to 30 years,» the Los Angeles Times writes.

Here's a prediction from 2007 where a climate scientist predicts that Arctic sea ice may disappear by 2013, saying that since his modelling didn't include the last couple of record lows in its training data,» you can argue that may be our projection of 2013 is already too conservative.»

A team of scientists from the National Snow and Ice Data Center and the National Center for Atmospheric Research concluded that the ice is melting much faster than climate models had predictIce Data Center and the National Center for Atmospheric Research concluded that the ice is melting much faster than climate models had predictice is melting much faster than climate models had predicted.

The climate models that scientists use to understand and project climate change are improving constantly, with better representations of the oceans, ice, land surfaces and other factors in the atmosphere.

For the decade of 2007 - 2017 (left), the research team predicts that there may be some growth of winter sea ice in the Arctic Ocean, particularly on the Atlantic side, where scientists have the most confidence in the model's ability.

For the decade of 2013 - 2023 (right), the scientists expect to see some winter sea ice loss balanced with sea ice gain on the Atlantic side of the Arctic Ocean, where scientists have the most confidence in the model's ability.

Hang on... we've been told for years by apparent top climate scientists to expect less snowfalls, climate models predict warmer winters, ex-politicians claiming ice - free polar caps, hand - wringing news articles of children who would never experience snowfalls, on and on... but now we're expected to believe exactly the opposite because that's what's happening now.