Sentences with phrase «atmospheric general circulation models»

The technique was originally developed to examine the storm tracks produced by atmospheric general circulation models (GCMs), but it is directly applicable to other gridded SLP datasets, such as those derived in weather forecasts or reanalysis projects.

Uncertainties in CO2radiative forcing in atmospheric general circulation models.

When heavy rainfall probabilities were next investigated in ensembles of two atmospheric general circulation models, run with and without anthropogenically - induced sea surface temperature changes, results were model - dependent.

This small ice - cap instability is also found in some atmospheric general circulation models (AGCMs), but it can be largely eliminated by noise due to natural variability (14).

Liang, B.J. McAvaney, V.P. Meleshko, J.J. Morcrette, D.A. Randall, E. Roeckner, M.E. Schelesinger, P.V. Sporyshev, K.E. Taylor, B. Timbal, E.M. Volodin, W. Wang, W.C. Wang, and R.T. Wetherald, 1997: Comparison of the seasonal change in cloud - radiative forcing from atmospheric general circulation models and satellite observations.

These boundary conditions were used by eight modelling groups to simulate Pliocene climate with atmospheric general circulation models.

Interpretation of cloud - climate feedback predicted by 14 atmospheric general circulation models.

27, pp.115 - 139, (1989).2 R. D. Cess et al, «Interpretation of cloud - climate feedback as produced by 14 atmospheric general circulation models», Science, Vol.

Methods: In these experiments, the research team conducted large ensembles of simulations with two state - of - the - art atmospheric general circulation models by abruptly switching the sea - surface temperature warming on from January 1st to focus on the wintertime circulation adjustment.

Zhang, M.H., R.D. Cess, J.J. Hack, and J.T. Kiehl, 1994: Diagnostic study of climate feedback processed in atmospheric general circulation models.

Slingo, J.M., et al., 1996: Intraseasonal oscillations in 15 atmospheric general circulation models: Results from an AMIP Diagnostic Subproject.

Cess, R.D., et al., 1989: Interpretation of cloud - climate feedback as produced by 14 atmospheric general circulation models.

With coordinated experiments with six atmospheric general circulation models, forced by observed daily sea - ice concentration and sea surface temperatures.

An atmospheric general circulation model coupled to a simple mixed layer ocean was forced with altered implied ocean heat transports during a period of increasing trace gases.

Wong, S., and W. - C. Wang, 2003: Tropical - extratropical connection in interannual variation of the tropopause: Comparison between NCEP / NCAR reanalysis and an atmospheric general circulation model.

Due to computational constraints, the equilibrium climate sensitivity in a climate model is usually estimated by running an atmospheric general circulation model coupled to a mixed - layer ocean model, because equilibrium climate sensitivity is largely determined by atmospheric processes.

We use an atmospheric general circulation model (AGCM) with a well - resolved stratosphere called the Whole Atmosphere Community Climate Model version 4 (WACCM4; with specified chemistry).

The second part of the dissertation analyzes dust emission in an atmospheric general circulation model (AGCM), where realistic simulation is inhibited by the model's coarse resolution compared to the scale of the circulations observed to mobilize dust.

Wang et al. (2012b) force the dynamical core of an atmospheric general circulation model with warming in the tropical troposphere that mimics the effects of climate change there.

However, the availability of non-radiative means for vertical transport of energy, including small - scale convection and large - scale atmospheric motions, must be accounted for, as is done in our atmospheric general circulation model.

Here we explain this interhemispheric asymmetry using an atmospheric general circulation model coupled to a slab ocean model.

The annular mode simulated by an atmospheric general circulation model with a zonally symmetric lower boundary is investigated.

Not exact matches

This corresponds in scope (not un-coincidentally) to the atmospheric component of General Circulation Models (GCMs) coupled to (at least) a mixed - layer ocean.

Our general circulation model simulations, which take into account the recently observed widespread occurrence of vertically extended atmospheric brown clouds over the Indian Ocean and Asia3, suggest that atmospheric brown clouds contribute as much as the recent increase in anthropogenic greenhouse gases to regional lower atmospheric warming trends.

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).

He promoted the use of water stable isotopomers for reconstructing past climate changes from ice cores and with associated atmospheric modelling using both dynamically simple and General Circulation Models (GCMs).

Scientists run general circulations models against these scenarios to project future climate conditions, including atmospheric carbon concentrations.

This year we received 14 June SIO submissions from dynamical models, of which 3 were from ice - ocean models forced by atmospheric reanalysis or other atmospheric model output and 12 were from fully - coupled general circulation models.

Khairoutdinov, M., D. Randall, and C. DeMott, 2005: Simulations of the atmospheric general circulation using a cloud - resolving model as a superparameterization of physical processes.

This corresponds in scope (not un-coincidentally) to the atmospheric component of General Circulation Models (GCMs) coupled to (at least) a mixed - layer ocean.

O'Gorman, P. A., and T. Schneider, 2007: Recovery of atmospheric flow statistics in a general circulation model without nonlinear eddy - eddy interactions.

Our general circulation model simulations, which take into account the recently observed widespread occurrence of vertically extended atmospheric brown clouds over the Indian Ocean and Asia, suggest that atmospheric brown clouds contribute as much as the recent increase in anthropogenic greenhouse gases to regional lower atmospheric warming trends.

This thesis presents the results of several general circulation model simulations aimed at studying the effect of ocean circulation changes when they occur in conjunction with increased atmospheric trace gas concentrations.

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 investigate the effects of CO2 emissions on ocean pH, we forced the Lawrence Livermore National Laboratory ocean general - circulation model (Fig. 1a) with the pressure of atmospheric CO2 (pCO2) observed from 1975 to 2000, and with CO2 emissions from the Intergovernmental Panel on Climate Change's IS92a scenario1 for 2000 — 2100.

It is my understanding that the general circulation models (depending on the model) either assumes there is no increase in cloud cover with increasing atmospheric CO2 or assumes the cloud cover reduces with increasing CO2.

But certainly models with such a grand name as «General Circulation Model», would include average diurnal atmospheric circulation patterns in tropics, and diurnal and seasonal patterns at latitudes outside the tropics, as well as heat transfer to the deCirculation Model», would include average diurnal atmospheric circulation patterns in tropics, and diurnal and seasonal patterns at latitudes outside the tropics, as well as heat transfer to the decirculation patterns in tropics, and diurnal and seasonal patterns at latitudes outside the tropics, as well as heat transfer to the deeper ocean.

She develops and applies numerical models for small - scale atmospheric processes and study these processes effect on the general circulation.

Here, FOR values are derived from a General Circulation Model by extracting OLR and SLE over areas in east - central Europe (at about 60 ° N) one hour after injecting appropriate CO2 concentration (adjustments to the atmospheric profile are thus excluded) to the Feb. 1 midnight simulation.

In the RCPs, the concentration of greenhouse gases is fixed at different times in the future and the climate model (or general circulation model or GCM) uses those atmospheric concentrations to calculate future climate states.

The fact that Wahl and Ammann (2006) admit that the results of the MBH methodology does not coincide with the results of other methods such as borehole methods and atmospheric - ocean general circulation models and that Wahl and Ammann adjust the MBH methodology to include the PC4 bristlecone / foxtail pine effects are significant reasons we believe that the Wahl and Amman paper does not convincingly demonstrate the validity of the MBH methodology.

The experiments were performed with ModelE2, a new version of the NASA Goddard Institute for Space Sciences (GISS) coupled general circulation model that includes three different versions for the atmospheric composition components: a noninteractive version (NINT) with prescribed composition and a tuned aerosol indirect effect (AIE), the TCAD version with fully interactive aerosols, whole - atmosphere chemistry, and the tuned AIE, and the TCADI version which further includes a parameterized first indirect aerosol effect on clouds.

The response of atmospheric CO2 and climate to the reconstructed variability in solar irradiance and radiative forcing by volcanoes over the last millennium is examined by applying a coupled physical — biogeochemical climate model that includes the Lund - Potsdam - Jena dynamic global vegetation model (LPJ - DGVM) and a simplified analogue of a coupled atmosphere — ocean general circulation model.

Each atmospheric version is coupled to two different ocean general circulation models: the Russell ocean model (GISS - E2 - R) and HYCOM (GISS - E2 - H).

They are also used as a boundary condition for atmospheric reanalyses and atmosphere only general circulation models (IPCC 2007).

For the July report, we received 14 June SIO submissions from dynamical models: 5 from ice - ocean models forced by atmospheric reanalysis or other atmospheric model output (in green in Figure 3) and 9 from fully coupled general circulation models (in blue in Figure 3).

As we now that there has been a period of 18 years with no surface warming when atmospheric CO2 was increasing for each and every year we know that the majority of the warming in the last 50 years was not due to the increase in atmospheric CO2 and the IPCC general circulation model calculated warming due to CO2 is orders of magnitude too high.

General circulation models predict that, for a doubling of atmospheric concentrations of carbon dioxide, mean annual air temperatures may rise several degrees over much of the Arctic.

Using atmospheric general - circulation models, as well as...