Figure 7: (a–c) Time evolutions of SLP (contours), 850 hPa relative vorticity (shaded), and 850 hPa horizontal wind (vectors) in the CTL run for case 1. The contoured interval is 4 hPa. The shading interval is 2 10−4 s−1. The reference arrow is 50 m s−1. Wind speeds less than 15 m s−1 are suppressed. (d–f) As in (a–c) but for the MOD run.