Aerosol particle size distributions at a traffic exposed site and an urban background location in Oporto, Portugal

Química Nova

Alves, Célia¹  Universidade de Aveiro, Aveiro, Portugal¹  Oliveira, César¹  Pio, Casimiro A.¹ 

关键词: particulate matter;    number size distributions;    traffic emissions.;   

DOI  :  10.1590/S0100-40422009000400019

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Aerosol size distributions from 6 to 700 nm were measured simultaneously at an urban background site and a roadside station in Oporto. The particle number concentration was higher at the traffic exposed site, where up to 90% of the size spectrum was dominated by the nucleation mode. Larger aerosol mode diameters were observed in the urban background site possibly due to the coagulation processes or uptake of gases during transport. Factor analysis has shown that road traffic and the neighbour stationary sources localised upwind affect the urban area thought intra-regional pollutant transport.

【 授权许可】

Unknown