Supplementary Materials
Chemical characteristics of rainwater in Sichuan basin, a case study of
Ya’an
Yun-Chun Li ▪ Meng Zhang ▪ Man Shu ▪ Steven Sai Hang Ho ▪ Zi-Fang Liu ▪ Xian-Xiang
Wang ▪ Xiao-Qing Zhao
__________________________________________________
Y.C. Li ()
College of Science, Sichuan Agricultural University, Ya’an, 625014, China
School of Environmental Science and Engineering, Nanjing University of Information Science and
Technology, Nanjing, 210044, China
e-mail: yunchunli@sicau.edu.cn
M. Zhang ▪ M. Shu ▪ X.X. Wang ▪ X.Q. Zhao
College of Science, Sichuan Agricultural University, Ya’an, 625014, China
Yun-Chun Li and Meng Zhang contributed equally to this work
S.S.H. Ho
Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of
Sciences, Xi’an, 710075, China
Z.F. Liu
Environmental Monitoring Station of Ya’an City, Ya’an, 625014, China
Table S1. Comparison between the sampling programs in Ya’an
Table S2. Correlation coefficients (R2) between ionic species in rainwater in Ya’an
Fig. S1 Typical backward trajectories for rain events associated with air masses from the five defined
sectors. a: regional; b: south-east; c: north-west; d: south-west wind; e: north-east
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Table S1. Comparison between the sampling programs in Ya’an
2010-2011 (Zhao et al. 2013)
Spring
Summer
Autumn
Winter
1-18 Apr. 2011
3-16 Jun.
17-28 Sep. 2010
31 Dec. 2010-14 Jan. 2011
Number of
samples
9
7
6
6
2013-2014 (This study)
May 2013, Mar.-May 2014
Jun.-Aug. 2013
Sep.-Nov. 2013
Dec. 2013
Number of
samples
16
20
6
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Table S2. Correlation coefficients (R2) between ionic species in rainwater in Ya’an
NH4+
K+
Na+
Mg2+
Ca2+
ClNO3SO42-
NH4+
1
0.72
0.45
0.44
0.32
0.77
0.77
0.85
K+
Na+
Mg2+
Ca2+
Cl-
NO3-
SO42-
1
0.59
0.53
0.41
0.80
0.77
0.79
1
0.65
0.63
0.73
0.46
0.56
1
0.89
0.68
0.56
0.55
1
0.57
0.41
0.42
1
0.84
0.84
1
0.86
1
a
b
2
c
d
e
Fig. S1 Typical backward trajectories for rain events associated with air masses from the five defined
sectors. a: regional; b: south-southeast; c: west-northwest; d: southwest; e: north-northeast
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