[MGI35-P06] Radiative transfer calculation for various planetary atmospheres: Application to a general circulation model
Keywords:planetary atmosphere, radiative transfer, Earth, Mars, Venus
In developing a radiation model for atmospheric circulation models, a line-by-line model is developed, first. The line-by-line calculation requires huge computational cost. In our line-by-line model, we assign several atmospheric layers to each MPI process to perform parallel computation. In typical calculation conditions, number of atmospheric layers is order of 10 to 100. Our calculation scales very well if the computation is performed with this number of processors. In order to validate the model, radiative fluxes and tendencies are calculated for the Earth, Venus, present Mars, and early Mars.
After the validation of the line-by-line calculation, we develop a radiation model based on correlated k-distribution method, which require much fewer computational cost and can be implemented into a general circulation model. In the presentation, comparison of radiative fluxes and tendencies calculated by our model with those by observation and/or by other models will be presented. In addition, some examples of general circulation model simulations will be presented, too.