The contents of CO, NO and NO sub 2 have been measured in air at street level by a mobile, continually recording instrument. These measurements were performed in Gothenburg in December 1982. NO and NO sub 2 were also measured simultaneously at a station high above the street level, but still in the city centre. The NO sub 2 content in relation to total NOsub(x)(NO+NO sub 2 ) was lower at street level than above, indicating some oxidation in rising air. When inversions occurred the NOsub(x)- content tended to become alike at street level and at the higher placed station. The contents of CO, NO and NO sub 2 inside a vehicle are equal to the contents outside the vehicle air intake. CO-contents rise significantly when queuing-up for red traffic lights occur. NO-contents rise when the measuring vehicle is behind a number of vehicles that are accelerating, or holding high speed. NO sub 2 -contents are high behind dieselengined vehicles. The mobile measurements have been performed both on innercity streets and on roads leading to the city. CO-contents are higher in the city, NO-contents are higher on the roads to the city, NO sub 2 -contents was found to be relatively evenly distributed. (ERA citation 11:006227)
Measurements of CO, NO sub 2 and NO inside and Outside Vehicles in Traffic
1983
20 pages
Report
No indication
English
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