5. Simulation setup The computational domain Atmosphere : 51.2 km×51.2 km (horizontally cyclic) Grand : 80 cm below the surface Grid interval Atmosphere : 200 m (lowest level is 3 m hight) Grand : 8 cm Solar flux diurnally change at northern summer condition. 20N, Ls=100 Initial condition Motionless atmosphere with vertical temperature profile at LT=6:00 calculated by using 1D model. Integration time is 12 hours.