(a) Tendency
(b) Horizontal advection
(c) Vertical advection
(d) Sum of all terms
(e) Stretching
(f) Tilting
Figure 10: Results of the vorticity budget analysis in the CTL run for case 2. The selected time is 17:00 UTC on December 7. The shading denotes the spatial distributions of vorticity tendency, each budget term, and the sum of the budget terms. The SLP distribution at that time is also shown.