Preliminary Experiments of Reproducing the Present Climate Using the Non-hydrostatic Regional Climate Model

Five-year integrations with the Non-hydrostatic Regional Climate Model (NHRCM) are conducted to evaluate the reproducibility of the regional climate. NHRCM, with a grid interval of 10 km, is nested in the Regional Analysis data set, and a 4 km grid interval NHRCM is nested in it. NI-IRCM reproduces the monthly precipitation, seasonal change, and regional features well when compared to AMeDAS observations. The model also simulates the frequency of heavy precipitation well. Annual mean temperature of NI-IRCM exhibits a +0.8 degrees C bias compared to the AMeDAS observation. NHRCM also reproduces inter-annual variation of surface temperature well, especially in summer.