Sentences with phrase «of global atmospheric models»

The current generation of global atmospheric models in use for climate studies around the world do some things remarkably well, as I've tried to argue in several earlier posts.

(In comparison, horizontal resolutions in most of the global atmospheric models referenced in the IPCC's 4th assessment are of the order of 100 - 300 km).

for any conceivable application of a global atmospheric model, say for weather forecasting or climate sensitivity experiments, the issues you raise are irrelevant.

Not exact matches

The study concludes that incorporating this new insight into soil models will improve our understanding of how soils influence atmospheric carbon dioxide levels and global climate.

KATHARINE HAYHOE is an atmospheric scientist at Texas Tech University, where she studies climate modeling and the regional impacts of global warming.

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.

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.

«Which of those is correct at this stage is unknown, but the droughts being driven by atmospheric greenhouse gas concentrations is in line with some of these global circulation models,» Lewis said.

«Advances in global climate models and high quality ocean, atmospheric and land observations are helping us push the frontiers of snowpack prediction.»

After confirming that oxidized organics are involved in the formation and growth of particles under atmospheric conditions, the scientists incorporated their findings into a global particle formation model.

The researchers looked at a total of 34 different global climate model outputs, encompassing different degrees of atmospheric sensitivity to greenhouse gases and different levels of human emissions of greenhouse gases into the atmosphere.

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.

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

Climate models show the absence of a global atmospheric circulation pattern which bolsters high ocean temperatures key to coral bleaching

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.

They used the Community Earth System Model, funded primarily by the Department of Energy and NSF, to simulate global climate as well as atmospheric chemistry conditions.

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.

To simulate the interplay of global climate with regional pollution conditions, the scientists turned to two of the world's leading atmospheric models, both based at NCAR and developed through broad collaborations with the atmospheric science community.

An international group of atmospheric chemists and physicist could now have solved another piece in the climate puzzle by means of laboratory experiments and global model simulations.

They were Jorge Sarmiento, an oceanographer at Princeton University who constructs ocean - circulation models that calculate how much atmospheric carbon dioxide eventually goes into the world's oceans; Eileen Claussen, executive director of the Pew Center for Global Climate Change in Washington, D.C.; and David Keith, a physicist with the University of Calgary in Alberta who designs technological solutions to the global warming prGlobal Climate Change in Washington, D.C.; and David Keith, a physicist with the University of Calgary in Alberta who designs technological solutions to the global warming prglobal warming problem.

The model is supported by observations from satellites, ground - based networks that measure ozone - depleting chemicals in the real world, and by observations from two decades of NASA aircraft field campaigns, including the most recent Airborne Tropical Tropopause Experiment (ATTREX) in 2013 and the Atmospheric Tomography (ATom) global atmospheric survey, which has made three deployments since 2016.

Model simulations of 20th century global warming typically use actual observed amounts of atmospheric carbon dioxide, together with other human (for example chloroflorocarbons or CFCs) and natural (solar brightness variations, volcanic eruptions,...) climate - forcing factors.

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.

Methods: Researchers Drs. Samson M. Hagos and L. Ruby Leung, atmospheric scientists at PNNL, surveyed tropical divergence in three global climate models, three global reanalyses (models corrected with observational data), and four sets of field campaign soundings.

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.

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).

The real «equilibrium climate sensitivity,» which is the amount of global warming to be expected for a doubling of atmospheric CO2, is likely to be about 1 °C, some three times smaller than most models assumed.

Wang, B., et al., 2004: Design of a new dynamical core for global atmospheric models based on some efficient numerical methods.

Tom appears challenged by the idea of building global climate models based on atmospheric physics and doing years of testing those models against actual data.

From an instantaneous doubling of atmospheric CO2 content from the pre-industrial base level, some models would project 2 °C (3.6 °F) of global warming in less than a decade while others would project that it would take more than a century to achieve that much warming.

Find out how researchers are using data from U.S. Department of Energy's Atmospheric Radiation Measurement (ARM) Climate Research Facility — the world's most comprehensive outdoor laboratory and data archive for research related to atmospheric processes that affect Earth's climate — to improving regional and global climate models.

A large ensemble of Earth system model simulations, constrained by geological and historical observations of past climate change, demonstrates our self ‐ adjusting mitigation approach for a range of climate stabilization targets ranging from 1.5 to 4.5 °C, and generates AMP scenarios up to year 2300 for surface warming, carbon emissions, atmospheric CO2, global mean sea level, and surface ocean acidification.

This simple but powerful and versatile application has proven invaluable for solving many real - world problems from tracking delivery vehicles, to recording details of planning applications, to modeling global atmospheric circulation.

Our estimate is based primarily on our review of a series of calculations with three - dimensional models of the global atmospheric circulation, which is summarized in Chapter 4.

On global vs. local, how about the global model prediction of a deepening and widening of the tropical atmospheric circulation, which leads to the Hadley cell expansion and the projection of the dry zones expanding polewards.

Finally, here's a brief video discussion of geo - engineering on The Wall Street Journal Web site, featuring Dale Jamieson and Alan Robock, an atmospheric scientist at Rutgers who's been modeling the climate consequences of human atmospheric meddling — from global warming to nuclear winter — for decades:

3) Simpler models can be designed to fit many aspects of the global temperature time series, or the most straightforward aspects of the atmospheric dynamics (Q - G models with dry physics for instance)(See Held, 2005 in BAMS for more examples).

Hermann Harde (2014)[PDF] «Advanced Two - Layer Climate Model for the Assessment of Global Warming by CO2» OPEN JOURNAL OF ATMOSPHERIC AND CLIMATE CHANGE, Volume1, Numberof Global Warming by CO2» OPEN JOURNAL OF ATMOSPHERIC AND CLIMATE CHANGE, Volume1, NumberOF ATMOSPHERIC AND CLIMATE CHANGE, Volume1, Number3.

In sensitivity experiments the influence of removed orography of Greenland on the Arctic flow patterns and cyclone tracks during winter have been determined using a global coupled model and a dynamical downscaling with the regional atmospheric model HIRHAM.

Mike's work, like that of previous award winners, is diverse, and includes pioneering and highly cited work in time series analysis (an elegant use of Thomson's multitaper spectral analysis approach to detect spatiotemporal oscillations in the climate record and methods for smoothing temporal data), decadal climate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measurements).

The work is an estimate of the global average based on a single - column, time - average model of the atmosphere and surface (with some approximations — e.g. the surface is not truly a perfect blackbody in the LW (long - wave) portion of the spectrum (the wavelengths dominated by terrestrial / atmospheric emission, as opposed to SW radiation, dominated by solar radiation), but it can give you a pretty good idea of things (fig 1 shows a spectrum of radiation to space); there is also some comparison to actual measurements.

Back in atmospheric physics, chaotic behaviour is a highly - studied and well - understood phenomenon of all realistic global models, arising directly from the nonlinearity of the Navier - Stokes equations for fluid flow.

The approximately 20 - year lag (between atmospheric CO2 concentration change and reaching equilibrium temperature) is an emerging property (just like sensitivity) of the global climate system in the GCM models used in the paper I linked to above, if I understood it correctly.

Tom appears challenged by the idea of building global climate models based on atmospheric physics and doing years of testing those models against actual data.

This hindcast uses two time - varying inputs: 10 - meter wind vectors from the atmospheric model NAVGEM (Navy Global Environmental Model, Hogan et al. 2014) run at the Fleet Numerical Meteorology and Oceanography Center (FNMOC), and analyses of ice concentrations (also produced at FNMOC) from passive microwave radiometer data (SSM model NAVGEM (Navy Global Environmental Model, Hogan et al. 2014) run at the Fleet Numerical Meteorology and Oceanography Center (FNMOC), and analyses of ice concentrations (also produced at FNMOC) from passive microwave radiometer data (SSM Model, Hogan et al. 2014) run at the Fleet Numerical Meteorology and Oceanography Center (FNMOC), and analyses of ice concentrations (also produced at FNMOC) from passive microwave radiometer data (SSM / I).

Syllabus: Lecture 1: Introduction to Global Atmospheric Modelling Lecture 2: Types of Atmospheric and Climate Models Lecture 3: Energy Balance Models Lecture 4: 1D Radiative - Convective Models Lecture 5: General Circulation Models (GCMs) Lecture 6: Atmospheric Radiation Budget Lecture 7: Dynamics of the Atmosphere Lecture 8: Parametrizations of Subgrid - Scale Physical Processes Lecture 9: Chemistry of the Atmosphere Lecture 10: Basic Methods of Solving Model Equations Lecture 11: Coupled Chemistry - Climate Models (CCMs) Lecture 12: Applications of CCMs: Recent developments of atmospheric dynamics and chemistry Lecture 13: Applications of CCMs: Future Polar Ozone Lecture 14: Applications of CCMs: Impact of Transport Emissions Lecture 15: Towards an Earth System Model

To better determine the fate of the species in the face of climate change, the researchers analyzed a total of 34 different global climate models, taking into account atmospheric sensitivity to greenhouse gases and different levels of human greenhouse gas emissions.

Although I was unable to demostrate the effect of this modification in the single column model, after returning from Korea I implemented this same scheme in a global atmospheric model and produced some interesting results.