A Persistent Fog Event Involving Heavy Pollutants in Yancheng Area of Jiangsu Province

<div>Time series of air pollutants concentration at the Yancheng site from 1 to 9 December 2013. The dotted red line represents 1 km visibility, and the dotted blue line represents 75 <i>μ</i>g·m<sup>−3</sup> PM<sub>2.5</sub> concentration.</div>

Advances in Meteorology

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Figure 4

Figure 4: A Persistent Fog Event Involving Heavy Pollutants in Yancheng Area of Jiangsu Province 