A Stretched Icosahedral Grid for the Global Cloud Resolving Model

摘要

Recently, Frontier Research Center for Global Change ( FRCGC ) has been developing a new global atmospheric model toward the climate simulation by cloud resolving. The strategy of model development is to use a modified icosahedral grid over the sphere and a new nohydrostatic dynamical scheme suitable to long time integration. Microphysics is a key issue of our devlopment, however, it is difficult to do trial and error with a few km grid over the globe. For an efficient inspection and/or development of cloud microphysics schemes by less computer resource, we modify the icosahedral grid by the Schmidt transformation and the model is used as a limited area model.