Evaluation of Cloud Microphysical Schemes for Winter Snowfall Events in Hokkaido: A Case Study of Snowfall by Winter Monsoon

The performances of bulk microphysical schemes were evaluated through comparisons with observations, including a new volume scanning video disdrometer targeting one typical snowfall event in Hokkaido, Japan. For the evaluation, downscaling experiments using three conducted: two-moment scheme, one-moment and an improved version scheme coupled identical dynamical core. successfully simulated measured relationship between particle size terminal velocity distribution (PSVD). On other hand, overestimated graupel frequency, its velocity, underestimated diameter. reduced overestimation hydrometeors, but still frequency. We frequency by modifying assumption velocity–diameter intercept parameter based on results disdrometeor. observation would give us hints to improve microphysics cases.