HR: 1340h
AN: A13C-0943 INVITED     [Abstracts]
TI: Measurement comparison of gas phase pollutants during field campaign in Pearl River Delta, China
AU: * Shao, M
EM: mshao@pku.edu.cn
AF: Peking University, College of Environmental Sciences, Beijing, 100871 China
AU: Zeng, L
A13C-0943 AF: Peking University, College of Environmental Sciences, Beijing, 100871 China
AU: Hu, M
A13C-0943 AF: Peking University, College of Environmental Sciences, Beijing, 100871 China
AU: Zhang, Y
A13C-0943 AF: Peking University, College of Environmental Sciences, Beijing, 100871 China
AB: Pearl River delta, an economically developed region in Guangdong province China, has been suffering from serious ground-level ozone pollution. To understand the formation mechanisms of the photochemical smog in this area, a field measurement campaign involving 12 separate institutes, was performed from Oct. 1 to Nov. 4, 2004. Measurements of gas phase pollutants, performed by the different research groups using several different methods, were inter-compared. Ambient SO2, O3 and NO were measured by Peking University and Hong Kong Polytechnic University using the same methods: chemiluminescence for NOx, pulsed fluorescence for SO2, and UV photometric method for O3. VOC speciation was accomplished using canister sampling followed by GC-MS measurement by Peking University and on-line GC-FID technology by National Central University in Taiwan. Ambient concentrations of HONO, the photolysis of which is the most important source of OH radical in Pearl River delta, was measured by two wet chemical methods: one from Energy Research Foundation of the Netherlands and one developed in Peking University. Based on these inter-comparisons, the co-variation of O3, NO and VOCs at an urban site and one rural site in Pearl River delta and estimates of the relative contributions to OH production from photolysis of O3, HONO and HCHO will be presented.
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0317 Chemical kinetic and photochemical properties
DE: 0322 Constituent sources and sinks
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005