A Study on Parameterization of the Beijing Winter Heavy Haze Events Associated with Height of Pollution Mixing Layer

Table 2

Observations and H_PML of heavy pollution in February 2014.

Station	Lon.	Lat.	(hPa)	(°C)	Wind dir. (d.)	Speed (m/s)	Vis. (km)	RH (%)	H_PML (m)	AQI level	W	PM2.5 (µg/m^3)
Barhu	118.3	48.2	1019.7	−9	330	1	0.9	76.7	406.6	3	Rain	148.3
Shuiling	127.1	47.2	1019.9	−1	159	3	1.2	86.2	247.4	3	Fog	179
Wulan	122.1	46.1	1016	−4	205	0	0.6	73.6	492.1	3	Heavy fog	148.8
Zhao	114.7	37.5	1024.1	0	177	0	0.4	86.3	247.6	6	Heavy haze	589
Gaoyi	114.6	37.6	1023.9	0	193	0	0.9	86.3	247.6	6	Fog	589
Handan	114.7	37.0	1024.0	1	264	0	0.3	93.0	123.9	6	Heavy haze	589
Wudan	119.0	42.9	1017.4	4	248	4	2.0	60.2	865.4	5	Heavy haze	260
Fengning	116.6	41.2	1024.5	−3	293	0	1.3	86	246.8	6	Fog	456
Shunyi	116.6	40.1	1024.0	2	12	0	0.6	80.4	372.0	6	Fog	456
Huailai	115.5	40.4	1024.5	−2	0	0	0.7	86.1	247.0	6	Heavy haze	453
Chaoyang	116.5	39.9	1024.0	1	110	0	0.5	80.3	371.6	6	Heavy haze	456
Dachang	116.9	39.9	1024.0	0	13	0	0.5	86.3	247.6	6	Heavy haze	434
Beijing	116.5	39.8	1023.7	3	74	1	0.5	74.9	496.0	6	Heavy haze	434
Baoding	115.5	38.7	1023.7	1	309	0	0.7	86.4	247.9	6	Heavy haze	487
Jinghai	116.9	38.9	1023.9	4	179	1	1.4	93.2	124.4	6	Fog	453
Zhenan	109.2	33.4	1024.1	6	149	0	3.4	86.9	249.5	3	Fog	191
Yexian	113.3	33.6	1026.1	7	201	0	1.0	93.3	124.9	2	Fog	156
Miyang	113.3	32.7	1024.9	8	101	0	0.9	93.4	125.1	2	Fog	156
Laifeng	109.4	29.5	1024.4	8	9	0	1.3	100.0	5.4	2	Rain	130.5
Huarong	112.6	29.5	1025.4	9	30	0	1.3	93.4	125.2	2	Fog	148
Pingyang	120.6	27.7	1020.9	13	219	0	0.3	100	5.4	2	Heavy fog	141.4
Rui'an	120.7	27.8	1020.5	13	265	1	0.5	100	5.4	2	Heavy fog	141.4
Lianshan	112.2	24.6	1022.2	12	325	0	0.9	93.6	125.2	2	Blue sky	126
Yongding	116.72	24.73	1023.2	16	9	1	2.6	100.0	5.4	3	Rain	101.7
Average			1023.0	4.0	161	1.0	1.0	87.0	239.7	4.2		309