Variability of Particle Number, Black Carbon, and PM10, PM2.5, and PM1 Levels and Speciation: Influence of Road Traffic Emissions on Urban Air Quality
Variability of Particle Number, Black Carbon, and PM10, PM2.5, and PM1 Levels and Speciation: Influence of Road Traffic Emissions on Urban Air Quality
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DOI：
10.1080/02786821003758286
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发表时间：
2010-01-01
影响因子：
5.2
通讯作者：
Viana, Mar
中科院分区：
文献类型：
--
作者：
Perez, Noemi;Pey, Jorge;Viana, Mar
在巴塞罗那的城市背景监测点进行了颗粒数浓度 (N)、黑碳 (BC) 以及 PM10、PM2.5 和 PM1 水平和形态的测量。所有气溶胶监测参数的每日变化很大程度上受到道路交通排放和气象的影响。 N、BC、PMX、CO、NO 和 NO2 的水平在交通高峰时段增加，反映了废气和非废气交通排放，然后由于微风的影响和交通强度的降低而下降。由于交通和风导致灰尘重新悬浮，白天 PM2.5-10 水平并未下降。 N 显示出第二个峰值，出现在下午，与 O-3 水平和太阳辐射强度平行，这可能归因于前体气体的光化学成核作用。从 1999 年到 2006 年，PM1 水平呈上升趋势，这与巴塞罗那交通流量和柴油机车队的增加有关。 PM成分受道路交通排放的影响很大，其中废气排放分别是PM1和PM2.5-10粉尘再悬浮过程的重要来源。
Measurements of particle number concentration (N), black carbon (BC), and PM10, PM2.5, and PM1 levels and speciation were carried out at an urban background monitoring site in Barcelona. Daily variability of all aerosol monitoring parameters was highly influenced by road traffic emissions and meteorology. The levels of N, BC, PMX, CO, NO, and NO2 increased during traffic rush hours, reflecting exhaust, and non-exhaust traffic emissions and then decreased by the effect of breezes and the reduction of traffic intensity. PM2.5-10 levels did not decrease during the day as a result of dust resuspension by traffic and wind. N showed a second peak, registered in the afternoon and parallel to O-3 levels and solar radiation intensity, that may be attributed to photochemical nucleation of precursor gases. An increasing trend was observed for PM1 levels from 1999 to 2006, related to the increase in the traffic flow and the diesel fleet in Barcelona. PM composition was highly influenced by road traffic emissions, with exhaust emissions being an important source of PM1 and dust resuspension processes of PM2.5-10, respectively.