Summertime PM 2 . 5 ionic species in four major cities of China : nitrate formation in an ammonia-deficient atmosphere

@inproceedings{Pathak2008SummertimeP2,
  title={Summertime PM 2 . 5 ionic species in four major cities of China : nitrate formation in an ammonia-deficient atmosphere},
  author={Raj Kumar Pathak and Wing See Wu and Tao Wang},
  year={2008}
}
Strong atmospheric photochemistry in summer can produce a significant amount of secondary aerosols, which may have a large impact on regional air quality and visibility. In the study reported herein, we analyzed sulfate, nitrate, and ammonium in PM 2.5 samples collected using a 24-h filter system at suburban and rural sites near four major cities in China (Beijing, Shanghai, Guangzhou, and Lanzhou). Overall, the PM2.5 mass concentrations were high (with a mean value of 55–68 g μgm−3), which… CONTINUE READING
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