Supporting Information NO x promotion of SO 2 conversion to sulfate: an important mechanism for the occurrence of heavy haze during winter in Beijing Jinzhu Ma a, b, c † , Biwu Chu a, b, c † , Jun Liu a, d , Yongchun Liu a, b, c , Hongxing Zhang e and Hong He a, b, c a State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,China b Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China c University of Chinese Academy of Sciences, Beijing 100049, China Corresponding Author. Phone: +86-10-62849123. Fax: +86-10-62849123. E-mail: [email protected]. 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2
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Supporting Information
NOx promotion of SO2 conversion to sulfate: an important mechanism for the occurrence of heavy haze during winter in Beijing
Jinzhu Maa, b, c †, Biwu Chua, b, c †, Jun Liua, d, Yongchun Liua, b, c, Hongxing Zhange and Hong Hea, b, c [footnoteRef:1] [1: Corresponding Author. Phone: +86-10-62849123. Fax: +86-10-62849123. E-mail: [email protected].]
a State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,China
b Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
c University of Chinese Academy of Sciences, Beijing 100049, China
d College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
e Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
†These authors contributed equally to this work and should be considered as co-first authors
Figure S1 Map of Beijing and locations of the monitoring sites
Figure S2 Variation trends of PM2.5 concentrations at DX, ZWY, and STZX stations in 2015.
Figure S3 The temporal variation of the meteorological variables in ZWY during 25 Nov. - 3 Dec. 2015
Figure S4 Hourly PM2.5 mass concentration plotted against concentration of individual species at STZX stations in non-heating season (16 Mar. - 16 Nov., 2015).
Figure S5 Hourly PM2.5 mass concentration plotted against concentration of individual species at ZWY stations in heating season (1 Jan. -15 Mar. and 15 Nov. -31 Dec.).
Figure S6 Hourly PM2.5 mass concentration plotted against concentration of individual species at ZWYX stations in non-heating season (16 Mar. - 16 Nov., 2015).
Figure S7 Hourly PM2.5 mass concentration plotted against concentration of individual species at DX stations in heating season (1 Jan. -15 Mar. and 15 Nov. -31 Dec.).
Figure S8 Hourly PM2.5 mass concentration plotted against concentration of individual species at DX stations in non-heating season (16 Mar. - 16 Nov., 2015).
Figure S9 The AMS spectra of organic compounds with the concentration of NO2.
Figure S10 Variation of SO42-, NO3-, NH4+ and Org concentrations with the concentration of NO2 with lower light intensity (k1 = 9.18×10-4 s-1)
11
253035404550
0.00
0.04
0.08
0.12
0.16
0.20
0.24
Relative abundance
m/z
NO
2
=35ppb
NO
2
=100ppb
NO
2
=160ppb
117161243
48
52
56
60
64
68
SO
4
2-
The concentration of NO
2
Concentration
(
g/m
3
)
117161243
100
150
200
250
300
NO
3
-
The concentration of NO
2
Concentration
(
g/m
3
)
117161243
50
60
70
80
90
100
110
The concentration of NO
2
Concentration
(
g/m
3
)
NH
4
+
117161243
30
40
50
60
70
80
Org
The concentration of NO
2
Concentration
(
g/m
3
)
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