756230.fig.007a
(a)
756230.fig.007b
(b)
756230.fig.007c
(c)
756230.fig.007d
(d)
Figure 7: Backward trajectories of air masses by NOAA HYSPLIT model ending at (a) 09:00 LST (00:00 UTC), October 27, 2003, (b) 17:00 LST (08:00 UTC; a maximum PM concentration), (c) 03:00 LST (18:00 UTC), October 28, and (d) 09:00 LST (00:00 UTC), respectively.