(a)
(b)
(c)
(d)
Figure 1:
Zonal mean variables for strong, normal, and weak HC cases: (a) meridional wind (ms
−1
) at 200 hPa, (b) zonal wind (ms
−1
) at 200 hPa, (c) omega (Pa/s) at 500 hPa, and (d) divergence (×10
−6
s
−1
) at 200 hPa.
