609328.fig.007a
(a)   Traffic
609328.fig.007b
(b) Traffic (lag1)
609328.fig.007c
(c) Temperature
609328.fig.007d
(d) Solar radiation
609328.fig.007e
(e) Solar radiation (lag1)
609328.fig.007f
(f) Solar radiation (lag12)
609328.fig.007g
(g) Wind speed
609328.fig.007h
(h) Wind speed (lag1)
609328.fig.007i
(i) Wind speed (lag2)
609328.fig.007j
(j) Relative Humidity
609328.fig.007k
(k) Pressure
Figure 7: Estimated effects of traffic and meteorological variables for NO2 during different seasons. Blue is Winter, red is Spring, orange is Summer, and violet is Fall.