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Size-resolved hygroscopic behaviour and mixing state of submicron aerosols in a
megacity of the Sichuan Basin during pollution and fireworks episodes
Liang Yuana,b, Xiaoling Zhanga, Miao Fengc, Xuan Liuc, Yuzhang Chea, Hanbing Xud,
Klaus Schaefera, Shigong Wanga, Yunjun Zhoua
a Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric
Sciences, Chengdu University of Information Technology, Chengdu 610225, China
b Key Laboratory of Meteorological Disaster ( KLME ) , Ministry of Education & Collaborative
Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD), Nanjing
University of Information Science and Technology, Nanjing 210044, China
c Chengdu Key Laboratory of Air Pollution Research , Chengdu Academy of Environmental
Sciences, Chengdu 610072, China
d Shared Experimental Education Center, Sun Yat-sen University, Guangzhou 510275, China
Supplement Files
Fig. S1 Average of the GF-PDFs for the five particle sizes measured during the Campaign.
Fig. S2 Time series of hourly WD, WS, T, RH, P, visibility and atmospheric pressure during PE1, CP1
and PE2.
Fig. S3 Time series of the 4 trace gases, PM2.5, PM10, mass concentration of BC and PNSDs with
diameter between 10 and 400 nm during PE1, CP1 and PE2.
Fig. S4 Time series of hourly WD, WS, T, RH, P, visibility and atmospheric pressure during CP2 and
PE3.
Fig. S5 Time series of the 4 trace gases, PM2.5, PM10, mass concentration of BC and PNSDs with
diameter between 10 and 400 nm during CP2 and PE3.
Fig. S6 Time series of hourly WD, WS, T, RH, P, visibility and atmospheric pressure during the FE
Fig. S7 Time series of the 4 trace gases, PM2.5, PM10, mass concentration of BC and PNSDs with
diameter between 10 and 400 nm during the FE.
Table S1 Descriptive statistics for the hygroscopic properties during PEs and CPs.
Dp NFNH NFLH NFMH κMean κNH κLH ΚMH
PE1
40 nm 0.39 0.33 0.28 0.14 0.02 0.13 0.31
80 nm 0.22 0.33 0.45 0.18 0.01 0.12 0.30
110 nm 0.16 0.32 0.51 0.19 0.01 0.11 0.29
150 nm 0.13 0.29 0.58 0.20 0.01 0.11 0.29
200 nm 0.11 0.25 0.65 0.22 0.01 0.11 0.29
CP1
40 nm 0.32 0.41 0.27 0.15 0.02 0.13 0.30
80 nm 0.21 0.34 0.45 0.18 0.01 0.11 0.30
110 nm 0.15 0.29 0.57 0.20 0.01 0.11 0.29
150 nm 0.10 0.22 0.67 0.23 0.01 0.11 0.30
200 nm 0.07 0.16 0.77 0.26 0.01 0.10 0.31
PE2
40 nm 0.46 0.31 0.23 0.12 0.02 0.13 0.30
80 nm 0.22 0.37 0.41 0.17 0.01 0.11 0.29
110 nm 0.16 0.33 0.51 0.19 0.01 0.11 0.29
150 nm 0.12 0.26 0.63 0.21 0.01 0.10 0.29
200 nm 0.10 0.18 0.73 0.25 0.01 0.10 0.31
CP2
40 nm 0.35 0.37 0.28 0.15 0.02 0.13 0.32
80 nm 0.19 0.28 0.53 0.21 0.01 0.12 0.31
110 nm 0.13 0.24 0.62 0.23 0.01 0.12 0.31
150 nm 0.11 0.19 0.70 0.25 0.01 0.11 0.32
200 nm 0.09 0.14 0.77 0.28 0.01 0.11 0.35
PE3
40 nm 0.31 0.33 0.36 0.17 0.02 0.13 0.33
80 nm 0.16 0.24 0.59 0.24 0.01 0.12 0.35
110 nm 0.14 0.21 0.64 0.25 0.01 0.11 0.35
150 nm 0.12 0.18 0.69 0.27 0.01 0.11 0.35
200 nm 0.11 0.14 0.74 0.29 0.01 0.10 0.37
Table S2 Descriptive statistics for the hygroscopic properties during the two stages in PE1 and the FE.
Dp NFNH NFLH NFMH κMean κNH κLH ΚMH
Stage 1 in PE1
40 nm 0.38 0.34 0.28 0.14 0.02 0.13 0.31
80 nm 0.20 0.31 0.50 0.19 0.01 0.12 0.30
110 nm 0.13 0.28 0.59 0.21 0.01 0.12 0.29
150 nm 0.09 0.24 0.66 0.23 0.01 0.11 0.29
200 nm 0.08 0.20 0.72 0.24 0.01 0.11 0.30
Stage 2 in PE1
40 nm 0.41 0.31 0.28 0.14 0.02 0.13 0.32
80 nm 0.25 0.36 0.39 0.17 0.01 0.11 0.31
110 nm 0.21 0.38 0.42 0.17 0.01 0.11 0.29
150 nm 0.17 0.35 0.47 0.17 0.01 0.10 0.27
200 nm 0.14 0.30 0.55 0.19 0.01 0.10 0.28
Before FE (2019.02.04 00:00-21:00 LST)
40 nm 0.16 0.42 0.42 0.21 0.03 0.14 0.34
80 nm 0.13 0.34 0.47 0.19 0.02 0.12 0.32
110 nm 0.10 0.34 0.52 0.20 0.02 0.12 0.31
150 nm 0.11 0.32 0.57 0.21 0.01 0.11 0.31
200 nm 0.11 0.25 0.57 0.22 0.01 0.11 0.35
FE (2019.02.04 22:00-2019.02.05 16:00 LST)
40 nm 0.23 0.43 0.34 0.19 0.03 0.12 0.38
80 nm 0.21 0.38 0.40 0.19 0.02 0.11 0.36
110 nm 0.17 0.35 0.48 0.21 0.02 0.11 0.35
150 nm 0.13 0.29 0.57 0.23 0.02 0.10 0.35
200 nm 0.12 0.23 0.64 0.27 0.01 0.10 0.37
After FE (2019.02.05 17:00-23:00 LST)
40 nm 0.33 0.26 0.41 0.19 0.02 0.13 0.34
80 nm 0.17 0.34 0.49 0.19 0.02 0.12 0.29
110 nm 0.12 0.36 0.51 0.19 0.02 0.12 0.28
150 nm 0.12 0.35 0.53 0.19 0.01 0.11 0.28
200 nm 0.11 0.31 0.58 0.21 0.01 0.11 0.30