title: Atmospheric polycyclic aromatic hydrocarbons (PAHs) of southern Taiwan in relation to monsoons.
abstract: The concentrations and gas-particle partitioning of atmospheric polycyclic aromatic hydrocarbons (PAHs) were intensively measured in the Hengchun Peninsula of southern Taiwan. The concentrations of total PAH (Σ38PAH), including gas and particle phases, ranged from 0.85 to 4.40 ng m(-3). No significant differences in the PAH levels and patterns were found between the samples taken at day and at night. The gas phase PAH concentrations were constant year-round, but the highest levels of particle-associated PAHs were found during the northeast monsoon season. Long-range transport and rainfall scavenging mechanisms contributed to the elevated levels in aerosols andΣ38PAH concentrations. Results from principal component analysis (PCA) indicated that the major sources of PAHs in this study were vehicular emissions. The back trajectories demonstrated that air mass movement driven by the monsoon system was the main influence on atmospheric PAH profiles and concentrations in the rural region of southern Taiwan. Gas-particle partition coefficients (K p ) of PAHs were well-correlated with sub-cooled liquid vapor pressures (P (o) L ) and demonstrated significant seasonal variation between the northeast (NE) and the southwest (SW) monsoon seasons. This study sheds light on the role of Asian monsoons regarding the atmospheric transport of PAHs.
authors.affiliation: National Museum of Marine Biology and Aquarium, Pingtung, Taiwan.|Department of Marine Environment and Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan.
authors.forename: Jing-O
authors.initials: JO
authors.lastname: Cheng
authors.affiliation: National Museum of Marine Biology and Aquarium, Pingtung, Taiwan. ko@mail.ndhu.edu.tw.|Institute of Marine Biology, National Dong-Hwa University, 2, Houwan Road, Checheng, Pingtung, Taiwan. ko@mail.ndhu.edu.tw.
authors.forename: Fung-Chi
authors.initials: FC
authors.lastname: Ko
authors.affiliation: Department of Marine Environment and Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan.|Kuroshio Research Group, Asia-Pacific Ocean Research Center, National Sun Yat-Sen University, Kaohsiung, Taiwan.|Center for Emerging Contaminants Research, National Sun Yat-Sen University, Kaohsiung, Taiwan.
authors.forename: Chon-Lin
authors.initials: CL
authors.lastname: Lee
authors.affiliation: Department of Marine Environment and Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan.|Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan.
authors.forename: Meng-Der
authors.initials: MD
authors.lastname: Fang
mesh_terms: D000336:Aerosols / Q000032:analysis; D000392:Air Movements; D000393:Air Pollutants / Q000032:analysis*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D025341:Principal Component Analysis; D012621:Seasons; D013624:Taiwan; D001335:Vehicle Emissions / Q000032:analysis
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D011084:Polycyclic Aromatic Hydrocarbons; D001335:Vehicle Emissions
keywords: Asian monsoon system; Gas-particle partitioning; Long-range transport; Polycyclic aromatic hydrocarbons (PAHs)