Using ERA-5 reanalysis data and ERSSTv5 sea surface temperature data as initial conditions, and running a global model with a 25km grid spacing, it seems that the North Pacific High is not well depicted in the East Asian region during July and August when the modeling starts in March. Especially, the 5880 gpm line at 500hPa geopotential height almost does not appear when drawing contours with ncl. Could you tell me why this problem occurs? Also, what measures should be taken to simulate more closely to reality?
