AAAR 35th Annual Conference October 17 - October 21, 2016 Oregon Convention Center Portland, Oregon, USA
Abstract View
Seasonal Source Apportionment of Primary and Secondary Fine Particulate Matter in China Using a Source-oriented Air Quality Model
JIANLIN HU, Qi Ying, Hongliang Zhang, Nanjing University of Information Science & Technology
Abstract Number: 202 Working Group: Source Apportionment
Abstract China have been facing extreme particulate matter (PM) pollution problems due to the combination of fast increase of population, industrialization, urbanization and associated energy consumption and lagging of sufficient emission control. Studies have identified that the major components of fine PM (PM2.5) include primary species, sulfate and nitrate, and organic aerosols (OA). However, contributions of different sources to different PM components are not clear due to differences in emission, transformation and deposition processes, which are critical information needed by policy makers to design effective emission control strategies.
In this study, a source-oriented version of the Community Multiscale Air Quality (CMAQ) model that directly tracks the contributions from multiple emission sources to PM2.5 components is developed, and applied to determine the regional contributions of power, industry, transportation and residential sectors to primary PM, nitrate and sulfate concentrations in China. Four months in 2012-2013 are simulated and model predictions are evaluated with ambient measured concentrations. The source-oriented CMAQ model is capable of reproducing most of the available total PM10 and PM2.5, and PM2.5 EC, POC, nitrate and sulfate observations. Predicted source contributions for EC also generally agree with the source contributions estimated by receptor models in literature. Model predictions suggest residential is a major contributor to primary PM (30-70%) in the spring and winter, and industrial contributes 40-60% of primary PM in the summer and fall. Transportation is an important source for EC (20-30%); Power sector is the dominating source of nitrate and sulfate in both winter and summer, transportation sector is an important source of nitrate (20–30%), and industry sector contributes 20–30% to nitrate and sulfate.