Variability of airborne particle metrics in an urban area

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• 作者：V. Rizza^a ; L. Stabile^a ; ^{l.stabile@unicas.it} ; G. Buonanno^a ; ^b ; L. Morawska^b
• 关键词：Airborne particles ; Urban areas ; Particle concentrations ; Street canyons ; Ultrafine particles ; PM
• 刊名：Environmental Pollution
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：220
• 期：part_PA
• 页码：625-635
• 全文大小：4465 K
• 卷排序：220

文摘

In the present study a mobile monitoring approach (i.e. bike with onboard instruments) was proposed and applied to investigate the spatial variability of all the key airborne particle metrics in an Italian urban area from a statistical point of view. Particle number, alveolar-deposited surface area, and PM10 concentrations were measured through hand-held monitors and compared to simultaneous background concentrations by means of non-parametric tests and further post-hoc tests (Kruskal-Wallis test). Streets characterized by exposure levels statistically higher than the background levels for all the particle metrics were identified for different seasons in a pilot urban area (Cassino, Italy). A higher number of hot spots was detected for metrics affected by ultrafine particles (i.e. number and alveolar-deposited surface area concentrations) with respect to PM10. The effect of metrological requirements of the instrumentation on the proposed method was also discussed.