P1.68
Microphysical structure of convective snow clouds simulated by an improved version of multi-dimensional bin model
Ryohei Misumi, National Research Institute for Earth Science and Disaster Prevention, Japan, Tsukuba, Japan; and A. Hashimoto, M. Murakami, N. Kuba, N. Orikasa, A. Saito, T. Tajiri, K. Yamashita, and J. P. Chen
A new version of bin-microphysics model, which uses four dimensions to represent ice-particle properties (ice mass, solute mass, aspect ratio and apparent volume) and two dimensions for liquid-drop properties (water mass and solute mass), is developed to simulate microphysical structure of clouds. As tests, the model is incorporated into an adiabatic parcel model and an idealized one-dimensional model to simulate the developing and mature stages of a convective snow cloud observed over the Sea of Japan. The water content and the size distribution of super-cooled drops, and the prevailing type of ice crystals are well consistent with the observations. The model also reveals that crystals originating from deposition/ condensation-freezing nuclei grow most quickly in the convective snow cloud, and isometric crystals among them would act as embryos of graupels in later stage.
Poster Session 1, Cloud Physics Poster Session 1
Monday, 28 June 2010, 5:30 PM-8:30 PM, Exhibit Hall
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