Sentences with phrase «on atmospheric modelling»

He is working with Dr. Hui Wan, Dr. Balwinder Singh and Dr. Phil Rasch on atmospheric model development and evaluation of DoE's E3SM (Energy Exascale Earth System Model) at PNNL.

Not exact matches

That information can then be plugged into atmospheric models to calculate cumulative emissions across larger areas, says Steve Wofsy, an atmospheric scientist at Harvard who is working on the project.

Now, to find out how the glaciers formed in the first place, scientists created models that simulated atmospheric circulation on the dwarf planet for the last 50,000 years (a mere 200 orbits around the sun for Pluto).

The US model performed on average as well as, or better than, the European model when using the full suite of atmospheric data from the ECMWF.

When Douglas MacMartin of the California Institute of Technology in Pasadena approached the National Science Foundation for support on a modeling effort on [albedo modification], officials told him the work was too theoretical for the engineering division and too applied for the atmospheric science program.

They used this data compilation to evaluate the quality of their regional atmospheric climate model, based on global climate projections that included several scenarios of anticipated climate change.

Random fluctuations and three physical reasons come into question to explain this: The model calculations are based on different amounts of radiant energy from the sun that impinge on Earth's surface and are stored as a result of the greenhouse effect, e.g. due to atmospheric carbon dioxide.

And by carefully measuring and modeling the resulting changes in atmospheric composition, scientists could improve their estimate of how sensitive Earth's climate is to CO2, said lead author Joyce Penner, a professor of atmospheric science at the University of Michigan whose work focuses on improving global climate models and their ability to model the interplay between clouds and aerosol particles.

But even the first step of modeling the effects of greenhouse gas sources and sinks on future temperatures requires input from atmospheric scientists, oceanographers, ecologists, economists, policy analysts, and others.

Computer models suggest that deploying aerosols can have «an appreciable impact on tropical cyclone intensity,» writes William Cotton, an atmospheric scientist at Colorado State University.

After a painstaking analysis that modeled all known sources of acceleration for Juno, including the minute contributions from sunlight warming the spacecraft, Iess's team found a large north - south asymmetry in Jupiter's gravitational field — a clear sign of material flowing beneath the cloud tops on deep atmospheric winds.

And because the comb measurements can be averaged over the entire path length rather than relying on a few spot measurements, the comb method is better matched to the scale of atmospheric transport models.

Forecasting models are based on physical laws governing atmospheric motion, chemical reactions and other relationships.

Their findings, based on output from four global climate models of varying ocean and atmospheric resolution, indicate that ocean temperature in the U.S. Northeast Shelf is projected to warm twice as fast as previously projected and almost three times faster than the global average.

The global climate models assessed by the Intergovernmental Panel on Climate Change (IPCC), which are used to project global and regional climate change, are coarse resolution models based on a roughly 100 - kilometer or 62 - mile grid, to simulate ocean and atmospheric dynamics.

Morgan O'Neill, the paper's lead author and a former PhD student in MIT's Department of Earth, Atmospheric and Planetary Sciences (EAPS), says the team's model may eventually be used to gauge atmospheric conditions on planets outside the solar system.

The inset map is a computer model of Asian mercury emissions across the Pacific Ocean at an altitude of 20,000 feet in April 2004, while atmospheric chemist Dan Jaffe was picking up significant mercury readings on Mount Bachelor (the highest concentrations are in red).

«We have also found that there is significant uncertainty based on the spread among different atmospheric models.

Chizek has run an atmospheric model that calculates how fast processes like solar ultraviolet irradiation will destroy methane on Mars.

The model also accounted for natural drivers of change, including the direct influence of increased carbon dioxide on ocean - carbon uptake and the indirect effect that a changing climate has on the physical state of the ocean and its relationship to atmospheric carbon dioxide.

Bringing together observed and simulated measurements on ocean temperatures, atmospheric pressure, water soil and wildfire occurrences, the researchers have a powerful tool in their hands, which they are willing to test in other regions of the world: «Using the same climate model configuration, we will also study the soil water and fire risk predictability in other parts of our world, such as the Mediterranean, Australia or parts of Asia,» concludes Timmermann.

The study authors based their analysis on a combination of satellite observations of rainfall and vegetation and an atmospheric circulation model to track the movement of air masses.

This investigation also provides detailed information on the atmospheric structure of the thermosphere, the layer of the Earth's atmosphere directly above the mesosphere and below the exosphere, by comparing and helping to refine models based on de-orbit data.

Effect of increased concentrations of atmospheric carbon dioxide on the global threat of zinc deficiency: a modelling study.

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 Exeter.

Air pollutant emission inventories are essential in measuring the impact of pollution on air quality and the climate, as they are fed into atmospheric and climate models to make projections for the future.

Columbia University physicist Peter Eisenberger created an effective model that proves, through real world testing, that carbon sequestration can be used on a global scale and can prevent the atmospheric levels of carbon dioxide from ever exceeding 450 ppm, below dangerous levels.

The results from the experiments were incorporated into a global atmospheric model to assess the impact of ELVOC on the particle formation and growth in the atmosphere.

For the study, Gentine and Lemordant took Earth system models with decoupled surface (vegetation physiology) and atmospheric (radiative) CO2 responses and used a multi-model statistical analysis from CMIP5, the most current set of coordinated climate model experiments set up as an international cooperation project for the International Panel on Climate Change.

NASA's Goddard Earth Observing System Version 5 (GEOS - 5) model simulates the atmosphere in 3 - D, which allows the research team to follow atmospheric gases from their sources on the ground through their journey to the upper atmosphere.

Those findings will be integrated into an atmospheric model that will assess the implications of the findings on local and regional climate scales.

All the models I've seen rely on the assumption that an increase in atmospheric greenhouse gases will necessarily increase the long - term average temperature of the globe and that all the other mechanisms that cause or counteract warming are understood and modeled fairly accurately.

The finding suggests that models used to gauge the impact of drought on ecosystems should be refined to more accurately account for the role of low atmospheric humidity.

On March 19, 2008, astronomers using the Hubble Space Telescope announced confirmation of the presence of water and the detection of more methane in the atmosphere of the planet than would be predicted by conventional atmospheric models for «hot Jupiters» (Hubble news release and videos; ESA news release and videos; and Swain et al, 2008 — more below).

The models aimed to simulate how the planet's climate system would react to rising CO2 levels, relying on a combination of mathematics, physics, and atmospheric science.

These included model structure complexity, atmospheric forcing and the human influences on streamflow reflected in the observed streamflow in regulated rivers.

Sally, who was nominated by Dr. Beat Schmid, Associate Director, Atmospheric Sciences and Global Change Division, was honored for her exceptional contribution in the field of atmospheric science, particularly in her efforts to improve understanding of the radiative effect of clouds and aerosols on the Earth's atmosphere and their representation in climate models.

The Hadley Centre has calculated the massive increase in atmospheric CO2 levels if the Amazon was to die back as a result of global warming (climate models differ on how likely this is, I understand).

Results: Researchers at Pacific Northwest National Laboratory — in collaboration with NERSC, Argonne National Laboratory, and Cray — recently achieved an effective aggregate IO bandwidth of 5 Gigabytes / sec for writing output from a global atmospheric model to shared files on DOE's «Franklin,» a 39,000 - processor Cray XT4 supercomputer located at NERSC.

This was accomplished using a stochastic climate model based on the concept that ocean temperature variability is a slow dynamical system, a red noise signal, generated by integrating stochastic atmospheric forcing, or white noise71.

Researchers are working on modeling Mars» atmospheric changes so the astronauts can land within a sufficiently dense portion that still provides enough visibility.

However, to make climate models more accurate, we are focused on developing a better understanding of the dynamics of organic aerosols formed from plant - based organic vapors and their interaction with aerosols emitted from human activities,» said Dr. Chen Song, a PNNL atmospheric scientist.

Because small - scale climate features, such as clouds and atmospheric aerosol particles, have a large impact on global climate, it's important to improve the methods used to represent those climate features in the models.

Scientists at Pacific Northwest National Laboratory showed that global climate models are not accurately depicting the true depth and strength of tropical clouds that have a strong hold on the general circulation of atmospheric heat and the global water balance.

PNNL is using an integrative research approach that draws on our depth and breadth of capabilities in atmospheric chemistry, climate physics, modeling, and measurement to address critical scientific questions related to the role of aerosols in the climate system.

To derive the climate projections for this assessment, we employed 20 general circulation models to consider two scenarios of global carbon emissions: one where atmospheric greenhouse gases are stabilized by the end of the century and the other where it grows on its current path (the stabilization [RCP4.5] and business - as - usual [RCP8.5] emission scenarios, respectively).

Vision PNNL will take a leadership role in the incorporation of aerosols into climate models, through integrative research on atmospheric aerosol interactions and through development of innovative instrumentation and measurement techniques.

Dr. Yun Qian, atmospheric and climate modeling scientist at Pacific Northwest National Laboratory, was invited to organize and direct an international workshop on «Uncertainty Quantification in Climate Modeling and Projection» in Triestemodeling scientist at Pacific Northwest National Laboratory, was invited to organize and direct an international workshop on «Uncertainty Quantification in Climate Modeling and Projection» in TriesteModeling and Projection» in Trieste, Italy.

For latitudes above 60 ° N, emissions are estimated to be 18 — 29 Tg CH4 per year on the basis of top - down atmospheric model approaches.

Previous proofs have relied on complex climate models, but this proof doesn't need such models — just careful observations of the land, ocean and atmospheric gases.»