Investigation of the Air Pollution Event in Beijing-Tianjin-Hebei Region in December 2016 Using WRF-Chem
Table 2
Performance statistics for meteorological and chemical variables from 04:00 on December 18 to 16:00 on December 18.
Variable
Site name
Na
COBS
CMOD
MB
RMSE
NMB
NME
RH2
Beijing
37
70.51
84.51
13.99
16.71
0.20
0.20
Tianjin
37
88.14
84.11
4.04
14.10
0.05
0.12
Shijiazhuang
37
73.38
87.02
12.64
15.34
0.19
0.19
Baoding
37
90.16
86.48
−3.65
11.58
−0.04
0.08
T2
Beijing
37
1.19
3.15
1.96
2.66
1.64
0.02
Tianjin
37
0.86
3.89
3.02
3.48
3.50
0.02
Shijiazhuang
37
1.73
3.61
1.88
2.02
1.09
0.01
Baoding
37
−2.54
0.83
3.38
4.44
−1.33
0.03
PM2.5
Beijing
37
224.16
278.89
54.73
128.44
0.24
0.69
Tianjin
37
267.86
315.97
48.11
122.31
0.18
0.53
Shijiazhuang
37
581.57
512.95
−68.62
156.51
−0.15
0.37
Baoding
37
369.27
360.65
−8.62
95.60
−0.02
0.28
SO2
Beijing
37
24.05
33.83
9.77
20.63
0.41
0.69
Tianjin
37
28.08
40.90
12.82
20.74
0.46
0.60
Shijiazhuang
37
96.89
132.08
35.19
50.70
0.36
0.48
Baoding
37
40.57
51.32
10.75
29.63
0.27
0.63
NO2
Beijing
37
111.14
105.19
−5.95
30.38
−0.05
0.23
Tianjin
37
131.32
139.68
8.35
60.22
0.06
0.42
Shijiazhuang
37
177.24
205
27.76
31.96
0.16
0.15
Baoding
37
141.08
158.27
17.19
34.12
0.12
0.21
Na is the number of paired samples. COBS and CMOD are the time series of the average of observation and model results. MB is the mean bias between the observation and model results. RMSE is the root-mean-square error of observation and model results. NMB is the normalized mean bias between the observation and model results. NME is the normalized mean error between the observation and model results.
