CLC number: TV5
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2017-12-15
Cited: 1
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Ling-hong Chen, Biao Lv, Xian-jue Zheng, Kang-wei Li, Jian-dong Shen, Kai-ji Bao, Xue-cheng Wu, Cheng-hang Zheng, Fang Ying, Xiang Gao, Ke-fa Cen. Effect of relative humidity on non-refractory submicron aerosol evolution during summertime in Hangzhou, China[J]. Journal of Zhejiang University Science A, 2018, 19(1): 45-59.
@article{title="Effect of relative humidity on non-refractory submicron aerosol evolution during summertime in Hangzhou, China",
author="Ling-hong Chen, Biao Lv, Xian-jue Zheng, Kang-wei Li, Jian-dong Shen, Kai-ji Bao, Xue-cheng Wu, Cheng-hang Zheng, Fang Ying, Xiang Gao, Ke-fa Cen",
journal="Journal of Zhejiang University Science A",
volume="19",
number="1",
pages="45-59",
year="2018",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1700567"
}
%0 Journal Article
%T Effect of relative humidity on non-refractory submicron aerosol evolution during summertime in Hangzhou, China
%A Ling-hong Chen
%A Biao Lv
%A Xian-jue Zheng
%A Kang-wei Li
%A Jian-dong Shen
%A Kai-ji Bao
%A Xue-cheng Wu
%A Cheng-hang Zheng
%A Fang Ying
%A Xiang Gao
%A Ke-fa Cen
%J Journal of Zhejiang University SCIENCE A
%V 19
%N 1
%P 45-59
%@ 1673-565X
%D 2018
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1700567
TY - JOUR
T1 - Effect of relative humidity on non-refractory submicron aerosol evolution during summertime in Hangzhou, China
A1 - Ling-hong Chen
A1 - Biao Lv
A1 - Xian-jue Zheng
A1 - Kang-wei Li
A1 - Jian-dong Shen
A1 - Kai-ji Bao
A1 - Xue-cheng Wu
A1 - Cheng-hang Zheng
A1 - Fang Ying
A1 - Xiang Gao
A1 - Ke-fa Cen
J0 - Journal of Zhejiang University Science A
VL - 19
IS - 1
SP - 45
EP - 59
%@ 1673-565X
Y1 - 2018
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1700567
Abstract: relative humidity (RH) has a significant and complex effect on aerosols because of the aqueous phase process and gas-particle partition. The mass concentration and size distribution of organic aerosols, sulfate, nitrate, ammonium, and chloride were measured using high-resolution time-of-flight aerosol mass spectrometry (HR-ToF-AMS). These measurements were recorded from Aug. 5 to Sept. 23, 2016 in Binjiang District, Hangzhou, China, during which period more than 78% of the readings showed an RH over 60%, while the average temperature was 26 °C. Correlation analysis was applied to inorganic aerosol measurements while positive matrix factorization (PMF) was applied for source apportionment of organic aerosols (OA). The pattern of fixation of ammonium in aerosols changed as the RH increased, suggesting that RH enhances nitrate participation in particles, while sulfate is scavenged by droplets. All species of non-refractory submicron particles (NR-PM1) showed an increase in their peak size as the RH increased. Primary OA (POA) continuously accumulated as the RH increased. When RH<60%, oxygenated OA (OOA) increased with increasing RH because of oxidation; semi-volatile OOA (SV-OOA) had a higher mass concentration during the daytime than at nighttime, indicating that the aqueous phase process and photochemistry synergistically affect the formation of oxygenated SV-OOA. When RH>60%, there was a relatively slow decrease in OOA, dominated by the wet removal effect rather than oxidation. The degree of oxidation of OA decreased as RH increased; this can be explained by most of the OOA with higher hygroscopicity being removed as droplets.
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