Graphical Abstract

Cheng, C. T., and K. Suzuki, 2021: Size-resolved aerosol microphysics in a global nonhydrostatic atmospheric model: Model description and validation. J. Meteor. Soc. Japan, 99,
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Plain Language Summary: Particle size determines the aerosol transport and removal processes, as well as how aerosol interacts with clouds and climate. In this study, we develop a sectional aerosol scheme for Spectral Radiation-Transport Model for Aerosol Species (SPRINTARS-bin) which explicitly simulates the variations in size distributions due to microphysical processes. SPRINTARS-bin is implemented in NICAM (Nonhydrostatic ICosahedral Atmospheric Model) as an alternative to the original mass-based SPRINTARS-orig aerosol module. Both schemes are evaluated by comparing year-long simulation results to ground-based measurements and satellite observations to find that the sectional scheme with better representations of ultra-fine particles largely alleviates underestimates of the aerosol number concentration in the original scheme.