Figure 5

Quantitative assessment of contribution of primary and secondary sources to the total SO42− in TSP and PM2.5 over Hotan. No PM2.5 data were available during the period of October 30–5 November, 2013.
Quantitative assessment of contribution of primary and secondary sources to the total SO42− in TSP and PM2.5 over Hotan. No PM2.5 data were available during the period of October 30–5 November, 2013.