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Table 3.6.
The influence of the weather conditions (temperature) on the air pollution levels of PAC, mutagens and inorganic components at the street site in 1992 and 1996.
 

 

Impact of Regulations of Traffic Emissions on PAH Level in the Air
Components 1996 street air:
Mean (Summer) / Mean (Winter)		 1992 street air:
Mean (March) / Mean (Jan. + Feb.)
Traffic PAH (BghiP, Cor) 0.69 - 0.88 0.34 - 0.40
Reactive PAH (CcdP, BaP) 0.23 - 0.79 0.31 - 0.39
Other PAH (BeP, BbjkF, IP) 0.93 - 1.07 0.33 - 0.45
Diesel-BeP 0.85 0.21
Benzanthrone 1.53
Mutagens
(TA98+S9, TA98-S9, TA98NR)		 1.2-2.1* 0.31 - 0.34
Traffic gases (CO, NO, gas NOy) 0.88 - 1.05 0.57 - 0.64
Soot 1.09 0.66
Particles 1.13 0.81
SO2 1.54 0.58
Sulphate 0.91 0.93
Particulate elements (K, V, Ni) 1.12 - 1.48 0.83 - 0.88
Particulate elements (Pb, Br) 0.93-1.04 0.55 - 0.69
Mn 2.07 1.07
Temperature 12.6 °C to 0.3 °C 5.6 °C to 2.0 °C
Wind speed - outside city 6.7 m/s to 5.6 m/s 6.0 m/s to 4.8 m/s
No. of measurements 5 to 11-15 6 to 19

* 0.34-0.53, if the data from the long-range transport episode and the idle emission case was omitted.