- 期刊
- OpenAccess
A Case Study of Investigating Secondary Organic Aerosol Formation Pathways in Beijing using an Observation-based SOA Box Model
摘要
Current modeling studies have underestimated secondary organic aerosol (SOA) levels in China to a larger degree than over Europe and the United States. In this study, we investigated the SOA formation pathways in urban Beijing for the period of November 7-8, 2014, using an observation-constrained box model in which the multigenerational oxidation processes of volatile organic compounds (VOCs) and intermediate VOCs (IVOCs) and the chemical aging of semi-volatile primary organic aerosols (POAs) were taken into account. The results demonstrated that the SOA formation rate was 30.3 μg m^(-3) day^(-1) in Beijing during the 2-day study period. The contributions of VOCs, IVOCs, and POAs to the SOA levels were 14%, 82%, and 4%, respectively. IVOC contributions were on a scale similar to the magnitude of underestimation in a previous study. The uncertainty analysis showed that SOA levels during the study period were 55.4-102.4 μg m^(-3) (the 25^(th) and 75^(th) percentiles of the sensitivity simulations). The contribution of IVOCs to the SOA formation was dominant compared with that of VOCs and POAs. A more precise IVOC oxidation mechanism can thus improve the performance of the SOA model in China.
延伸閱讀
- Liu, B., Gong, W., Ma, Y., Zhang, M., Yang, J., & Zhang, M. (2018). Surface Aerosol Optical Properties during High and Low Pollution Periods at an Urban Site in Central China. Aerosol and Air Quality Research, 18(12), 3035-3046. https://doi.org/10.4209/aaqr.2017.12.0565
- Zhao, X., Sun, Z., Sun, Y., Yang, T., Chen, D., Li, Z., Xiong, Y., & Tang, G. (2021). Three-dimensional Thermal and Dynamic Structure in Synoptic and Local Scale and its Influence on Haze Formation during Autumn in Beijing. Aerosol and Air Quality Research, 21(8), 1-20. https://doi.org/10.4209/aaqr.200593
- Liu, D., Vonwiller, M., Li, J., Liu, J., Szidat, S., Zhang, Y., Tian, C., Chen, Y., Cheng, Z., Zhong, G., Fu, P., & Zhang, G. (2020). Fossil and Non-fossil Fuel Sources of Organic and Elemental Carbonaceous Aerosol in Beijing, Shanghai, and Guangzhou: Seasonal Carbon Source Variation. Aerosol and Air Quality Research, 20(11), 2495-2506+ap1-2. https://doi.org/10.4209/aaqr.2019.12.0642
- Li, P. H., Han, B., Huo, J., Lu, B., Ding, X., Chen, L., Kong, S. F., Bai, Z. P., & Wang, B. (2012). Characterization, Meteorological Influences and Source Identification of Carbonaceous Aerosols during the Autumn-winter Period in Tianjin, China. Aerosol and Air Quality Research, 12(2), 283-294. https://www.airitilibrary.com/Article/Detail?DocID=16808584-201204-201203290003-201203290003-144-155
- Bilal, M., Nichol, J. E., & Spak, S. N. (2017). A New Approach for Estimation of Fine Particulate Concentrations Using Satellite Aerosol Optical Depth and Binning of Meteorological Variables. Aerosol and Air Quality Research, 17(2), 356-367. https://doi.org/10.4209/aaqr.2016.03.0097