An examimation of air pollution behaviour in relation to monitoring station's surroundings

Jason Lau, W. T. Hung, Chun Shun Cheung

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This study explores the appropriateness of the locality of air monitoring stations which are meant to indicate air quality in the area. Daily variations in NO2 and PM10 concentrations at fourteen monitoring stations in Hong Kong are examined. The daily variations in NO2 at a number of background monitoring stations exhibit patterns similar to variations in traffic volume while variations in PM10 concentration exhibit less discernible pattern. Principal Component Analysis (PCA) and Cluster Analysis (CA) are applied to analyse NO2 and PM10 measurements between January 2001 and December 2005. The results show that NO2 concentrations at background stations within the urban area are highly influenced by vehicle emissions. The effect vehicle emission has on NO2 at stations within new towns is smaller. CA results also show that variations in PM10 concentrations are distinguished by the area the station is located in. The strong influence of roadside emissions towards concentrations of NO2 and PM10 at a number of urban background stations may be due to their close proximity to busy roadways and the high density of surrounding tall buildings, which creates an enclosure that hinders dispersion of roadside emissions and results in air pollution behaviour that reflects variation in traffic.
Original languageEnglish
Title of host publicationProceedings of the 1st International Postgraduate Conference on Infrastructure and Environment, IPCIE 2009
Pages75-82
Number of pages8
Publication statusPublished - 1 Dec 2009
Event1st International Postgraduate Conference on Infrastructure and Environment, IPCIE 2009 - Hong Kong, Hong Kong
Duration: 5 Jun 20096 Jun 2009

Conference

Conference1st International Postgraduate Conference on Infrastructure and Environment, IPCIE 2009
Country/TerritoryHong Kong
CityHong Kong
Period5/06/096/06/09

Keywords

  • Cluster analysis
  • Monitoring station location
  • NO 2
  • PM 10
  • Principal component analysis
  • Roadside emission

ASJC Scopus subject areas

  • Building and Construction
  • Environmental Science(all)

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