Continuous measurements at the urban roadside in an Asian megacity by Aerosol Chemical Speciation Monitor (ACSM) : Particulate matter characteristics during fall and winter seasons in Hong Kong

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • C. Sun
  • B. P. Lee
  • D. Huang
  • Y. Jie Li
  • M. I. Schurman
  • P. K K Louie
  • C. Luk

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Detail(s)

Original languageEnglish
Pages (from-to)1713-1728
Journal / PublicationAtmospheric Chemistry and Physics
Volume16
Issue number3
Publication statusPublished - 15 Feb 2016

Link(s)

Abstract

Non-refractory submicron aerosol is characterized using an Aerosol Chemical Speciation Monitor (ACSM) in the fall and winter seasons of 2013 on the roadside in an Asian megacity environment in Hong Kong. Organic aerosol (OA), characterized by application of Positive Matrix Factorization (PMF), and sulfate are found to be dominant. Trafficrelated organic aerosol shows good correlation with other vehicle-related species, and cooking aerosol displays clear mealtime concentration maxima and association with surface winds from restaurant areas. Contributions of individual species and OA factors to high NR-PM1 are analyzed for hourly data and daily data; while cooking emissions in OA contribute to high hourly concentrations, particularly during mealtimes, secondary organic aerosol components are responsible for episodic events and high day-to-day PM concentrations. Clean periods are either associated with precipitation, which reduces secondary OA with a lesser impact on primary organics, or clean oceanic air masses with reduced long-range transport and better dilution of local pollution. Haze events are connected with increases in contribution of secondary organic aerosol, from 30 to 50% among total non-refractory organics, and the influence of continental air masses.

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Citation Format(s)

Continuous measurements at the urban roadside in an Asian megacity by Aerosol Chemical Speciation Monitor (ACSM) : Particulate matter characteristics during fall and winter seasons in Hong Kong. / Sun, C.; Lee, B. P.; Huang, D.; Jie Li, Y.; Schurman, M. I.; Louie, P. K K; Luk, C.; Chan, C. K.

In: Atmospheric Chemistry and Physics, Vol. 16, No. 3, 15.02.2016, p. 1713-1728.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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