摘要：We investigated the simulation performance of two versions of the atmospheric general circulation model (MRI-AGCM3) in reproducing precipitation climatology over the Middle East in comparison with high-resolution gridded precipitation datasets. Both models overestimated precipitation amounts compared with the observations over this region. The new version, MRI-AGCM3.2, overestimated precipitation much more than the old version, MRI-AGCM3.1, particularly in the winter and spring rainy seasons, but the new version was better than the old version in the summer dry season. We also investigated resolution dependency. The higher the resolution the more the precipitation indicated, but the higher resolution version showed better performance in reproducing the spatial distribution of annual and seasonal mean precipitation, probably due to better representation of orography. These results indicate difficulty in climate model development in terms of regional climate reproducibility.
