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

Table 1

The beginning and ending times of five explosive processes and the visibility at each time.

	Time	Visibility (km)
Case 1
Beginning	03:57 BT on 2 December	1.142
Ending	04:24 BT on 2 December	0.037
Case 2
Beginning	23:11 BT on 3 December	0.517
Ending	23:47 BT on 3 December	0.042
Case 3
Beginning	23:52 BT on 4 December	0.537
Ending	00:20 BT on 5 December	0.027
Case 4
Beginning	00:36 BT on 7 December	1.772
Ending	01:04 BT on 7 December	0.085
Beginning	02:41 BT on 7 December	1.587
Ending	02:58 BT on 7 December	0.092
Beginning	03:47 BT on 7 December	1.29
Ending	03:55 BT on 7 December	0.071
Beginning	04:13 BT on 7 December	0.553
Ending	04:27 BT on 7 December	0.033
Case 5
Beginning	20:18 BT on 8 December	0.298
Ending	21:08 BT on 8 December	0.04