As the surface drag is increased in a comprehensive general circulation model (GCM), the upper-level zonal winds decrease and eddy momentum flux convergence into the jet core increases. Globally averaged eddy kinetic energy decreases, a response that is inconsistent with the conventional barotropic governor mechanism whereby decreased barotropic shears encourage baroclinic wave growth. As the c...

An analysis of the climate parametrization scheme adopted by conventional forest gap models revealed that most models assume a constant climate and are difficult to calibrate consistently. Tree growth showed unrealistically sensitive threshold effects along ecological gradients of temperature and precipitation. A new parametrization was compared with its predecessors in terms of the model's cap...

Abstract Recently it has been suggested that natural variability in sea surface temperature (SST) patterns over the historical period causes a low bias estimates of climate sensitivity based on instrumental records, addition to by time variation feedback parameter atmospheric general circulation models (GCMs) coupled dynamic oceans. This excess, unforced, “pattern effect” (the effect evolving s...

Radiative heating associated with the distribution of water vapor and clouds in the atmosphere is an important driver of both local-scale and large-scale circulations in the tropics. One of the difficulties in producing accurate cloud and radiative heating rate profiles with a general circulation model (GCM) is the sub-grid scale nature of cloud processes and their interaction with radiation. T...

Long lead rainfall prediction is important in the management and operation of water resources and many models have been developed for this purpose. Each of the developed models has its special strengths and weaknesses that must be considered in real time applications. In this paper, eld and General Circulation Models (GCM) data are used with the Statistical Downscaling Model (SDSM) and the Arti...

[1] The response of three numerical model dynamical cores to Venus‐like forcing and friction is described in this paper. Each dynamical core simulates a super‐rotating atmospheric circulation with equatorial winds of 35 ± 10 m/s, maintained by horizontally propagating eddies leaving the equatorial region and inducing a momentum convergence there. We discuss the balance between the mean circulat...

The overall objective is to use diagnostic and modeling methods to decipher and understand physical processes/causal links that connect tropical and North Atlantic sea surface temperature (SST) variations associated with the Atlantic Multidecadal Oscillation (AMO) to changes in atmospheric circulation and warm season precipitation regimes for North America. The ultimate goal is to include repre...

[1] Bacastow [1996], Broecker et al. [1999], and Archer et al. [2000] have called attention recently to the fact that box models and general circulation models (GCMs) represent the thermal partitioning of CO2 between the warm surface ocean and cold deep ocean in different ways. They attribute these differences to mixing and circulation effects in GCMs that are not resolved in box models. The me...

[1] A theory for the ocean-atmosphere partitioning of anthropogenic carbon dioxide on centennial timescales is presented. The partial pressure of atmospheric CO2 (PCO2) is related to the external CO2 input (DSC) at air-sea equilibrium by: PCO2 = 280 ppm exp(DSC/[IA + IO/R]), where IA, IO, and R are the pre-industrial values of the atmospheric CO2 inventory, the oceanic dissolved inorganic carbo...

Abstract Horizontal diffusion and resolution are important factors to generate maintain the super-rotation in general circulation model (GCM) because waves which transport angular momentum sensitive them. Here, we investigated how depends on magnitude of horizontal hyper using a Venus atmospheric GCM with medium high resolutions. In both runs, found parameter range where structure fully develop...