The immission load of nitric oxide due to traffic is investigated in the cities of Lyon, Geneva, and Stuttgart using a mobile differential absorption LIDAR system (DIAL). Horizontal and vertical maps of the NO mixing ratio, as well as 24 hour records are presented. It is shown that street canyons favor high immission values, whereas broad main axes are efficiently ventilated (Lyon); inversion conditions raise the average immission load within a city mainly independent of traffic (Geneva and Stuttgart), whereas highly frequented intersections favor high immission values regardless of weather conditions (Geneva); the observed maximum immission loads also depend on the traffic density during rush hours (Stuttgart).
Comparative study of nitric oxide immission in the cities of Lyon, Geneva, and Stuttgart using a mobile differential absorption LIDAR system
Vergleichende Studie von Stickoxidimmissionen in Lyon, Genf und Stuttgart mittels eines mobilen, differentialabsorbierenden LIDAR-Systems
Applied Physics B (Photophysics and Laser Chemistry) ; B54 , 1 ; 89-94
1992
6 Seiten, 22 Quellen
Article (Journal)
English
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