in spite of considerable increase in the resolution of general circulation and regional models, none of these models are capable to predict and downscale the meteorological outputs in the scale of meteorological station.in this regard, different dynamical and statistical models have been developed for downscaling outputs of gcms. in this paper, grided meteorological outputs of general circulati...

We examine the relative roles of direct atmospheric radiative forcing (due to observed changes in well-mixed greenhouse gases, tropospheric and stratospheric ozone, sulfate and volcanic aerosols, and solar output) and observed sea surface temperature (SST) forcing of global atmospheric circulation trends during the second half of the 20 century using atmospheric general circulation modeling exp...

This study has used TOMS AI as well as the reanalysis dataset of thirty-four years (1979-2012) to investigate the influence of atmospheric circulation on dust transport during the Harmattan period in West Africa, using Aerosol Index (AI) data, obtained from various satellite sensors. Changes in Inter-Tropical Discontinuity (ITD), Sea Surface Temperature (SST) over the Gulf of Guinea, and North ...

This study is a part of the Atmospheric Radiation Measurement (ARM) Program single-column model (SCM) intercomparison project, which compares the performance of various SCMs and cloud ensemble models (CEMs) with ARM intensive observation period (IOP) data sets. The goal of this project is to improve the representations of cloud formative/dissipative processes in general circulation models (GCMs...

The present study deals with the implementation of an eddy resolving model of the Levantine and Aegean basins and its one-way nesting with a coarse resolution (1/8× 1/8) global Mediterranean general circulation model. The modelling effort is done within the framework of the Mediterranean Forecasting System Pilot Project as an initiative towards real-time forecasting within the eastern Mediterra...

Predictability of atmospheric variability is known to be limited owing to significant uncertainty that arises from intrinsic variability generated independently of external forcing and/or boundary conditions. Observed atmospheric variability is therefore regarded as just a single realization among different dynamical states that could occur. In contrast, subject to wind, thermal and fresh-water...

[1] We compare cloud-radiative forcing (CRF) at the top-of-the atmosphere from 19 atmospheric general circulation models, employing simulations with prescribed seasurface temperatures, to observations from the Earth Radiation Budget Experiment (ERBE). With respect to 60 N to 60 S means, a surprising result is that many of the 19 models produce unusually large biases in Net CRF that are all of t...

In the context of global climate change, it is important to monitor abnormal changes in extreme precipitation events that lead frequent floods. This research used indices describe variations and analyzed characteristics four climatic (arid, semi-arid, semi-humid humid) regions across China. The equidistant cumulative distribution function (EDCDF) method was downscale bias-correct daily eight Co...