Yuan Gao

TL;DR: In this paper, a photochemical box model based on the Master Chemical Mechanism (MCM v3.2) is constrained by an intensive set of field observations to elucidate the budgets of ROx and NO3 radicals.

TL;DR: In this paper, four characterization campaigns were conducted at a representative urban roadside environment in Hong Kong between May 2011 and February 2012, and the results demonstrated the effectiveness of the switch from diesel to LPG-fueled engine for taxis and mini-buses implemented by the Hong Kong Special Administrative Region (HKSAR) Government between the recent ten years.

TL;DR: The findings of this study suggest the need to consider the chemical processes in the aerosol aqueous phase when examining the chemical budget of gas-phase H2O2.

TL;DR: In this paper, a series of air pollution control measures to reduce vehicular emissions in Hong Kong have been undertaken by repeated measurement in the same roadway tunnel in 2003 and 2015, and the total net concentration of measured VOCs decreased by 44.7% from 2003 to 2015.

TL;DR: The elemental mapping of individual particles reveal that sulfate areas without metal inclusions also contain minor Fe, Mn, or Zn, therefore, the internal mixing of metals and acidic constituents likely solubilize metals and modify metal inclusion shapes.