title: Study of the PM₁₀ concentration variations along two intra-urban roads within a compact city.
abstract: Eighty-five measurement campaigns were performed repeatedly to compare the concentration variation profiles along two intra-urban roads-one with open configuration and the other with street canyon effect. Fixed-effects panel data analysis was applied for formulating a model to express the PM(10) concentrations along intra-urban roads in terms of parameters like nearby central monitoring data, traffic counts and meteorological conditions with an objective to analyze the PM(10) concentration variation patterns along the two roads. Our findings reveal that traffic intensity and metrological conditions exert influence on concentration variation for both types of road configurations while wind velocity only affect the pollutants removal effectiveness of open road configuration. Further analysis unveils that the PM(10) concentration distribution profiles within a compact city environment are not always uniform and are dependent on the road configuration. Considerable PM(10) concentration differences were observed along the street canyon, and 70% of their variations are attributed to variations in their road aspect ratios. By contrast, no significant concentration difference is observed at open road configurations.
authors.affiliation: Department of Building Services Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong. beckchau@polyu.edu.hk
authors.forename: Chi Kwan
authors.initials: CK
authors.lastname: Chau
authors.forename: Lillan Shuk Ching
authors.initials: LS
authors.lastname: Pun-Cheng
authors.forename: Wai Yin
authors.initials: WY
authors.lastname: Ng
authors.forename: Wai Kwan
authors.initials: WK
authors.lastname: Hui
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000706:statistics & numerical data; D002947:Cities; D004784:Environmental Monitoring; D018986:Motor Vehicles / Q000706:statistics & numerical data; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter