94 Multivariable Scheme for Diagnosing Ice Particle Features in a Bulk Microphysics Model

Monday, 9 July 2018
Regency A/B/C (Hyatt Regency Vancouver)
Akihiro Hashimoto, MRI, Tsukuba, Japan; and H. Motoyoshi, R. Misumi, and N. Orikasa

The microphysics module in the Japan Meteorological Agency Non-Hydrostatic Model (JMA-NHM) has been partly renewed to extend its function for tracking physical properties of solid hydrometeors by adding new prognostic variables to represent contributions of microphysical processes, such as riming, water vapor deposition, and so on, to the bulk mass of ice particles. This improvement enhances potentials of a bulk microphysics model for its applications to prediction of hydrometeor characteristics in connection with cloud remote-sensing and snow disaster prevention.

The new model was tested by performing numerical simulations of orographic snowfall events in a simplified atmospheric condition. The results of simulations were compared with the 1990’s observations based on photographing snow particles. Preliminary results will be presented in the conference.

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