MEASUREMENTS AND MODELLING OF AIR POLLUTION IN A STREET CANYON IN HELSINKI

摘要

A measuring campaign was conducted in the street canyon 'Rundberg street' in Helsinki in 1997. Hourly concentrations of carbon monoxide(CO), nitrogen oxides(NO_x), nitrogen dioxide (NO_2)and ozone(O_3)were measured at the street and roof levels, and the relevant hourly meteorological parameters were measured at the roof level. The hourly street level measurements and on-site electronic traffic counts were conducted during the whole year 1997, and roof level measurements were conducted during approximately two months, from 3 March to 30 April in 1997.