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    Atmospheric and hydrospheric sciences

    201410201410

    The Non-hydrostatic Icosahedral Atmospheric Model: Description and Development

    Satoh M, Tomita H, Yashiro H, Miura H, Kodama C, Seiki T, Noda A, Yamada Y, Goto D, Sawada M, Miyoshi T, Niwa Y, Hara M, Ohno Y, Iga S, Arakawa T, Inoue T, Kubokawa H

    Global non, hydrostatic model, Icosahedral grid, Global cloud-resolving simulations

    Icosahedral grids for grid division levels of 3, 4, and 5 (from left to right) (horizontal mesh spacings of approximately 893, 446 and 223 km).

    Cloud distribution simulated by the NICAM 870 m grid spacing experiment.

    This article reviews the development of a global non-hydrostatic model, focusing on the pioneering research of the Non-hydrostatic Icosahedral Atmospheric Model (NICAM). Very high resolution global atmospheric circulation simulations with horizontal mesh spacing of approximately O (km) were conducted using recently developed supercomputers. These types of simulations were conducted with a specifically designed atmospheric global model based on a quasi-uniform grid mesh structure and a non-hydrostatic equation system. This review describes the development of each dynamical and physical component of NICAM, the assimilation strategy and its related models, and provides a scientific overview of NICAM studies conducted to date.