Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/74843
PIRA download icon_1.1View/Download Full Text
Title: New particle formation and growth at a suburban site and a background site in Hong Kong
Authors: Lyu, XP 
Guo, H 
Cheng, HR
Wang, DW
Issue Date: Feb-2018
Source: Chemosphere, Feb. 2018, v. 193, p. 664-674
Abstract: Atmospheric nanoparticles have great impacts on human health and global climate change. The number concentrations and size distributions of nanoparticles in the size range of 5.5–350.4 nm were detected at a background site and a suburban site in Hong Kong from summer to winter in 2011 and in autumn of 2013, respectively. Significantly higher particle number concentrations in all modes were observed at the suburban site (p < 0.05) during the sampling periods, possibly due to stronger primary emissions/regional transport and more intensive new particle formation (NPF). Particle number concentrations were much enhanced under northerly winds at both sites, resulting from regional transport of Aitken and accumulation mode particles, enhanced local NPF and occasionally low condensation sink. NPF was mainly limited by the precursors of condensable vapors and oxidative capacity of the atmosphere at the background site and the suburban site, respectively. In most cases, the formation rate of 5.5 nm particles was a function of sulfuric acid vapor to the power of 1.32 ± 0.34 at the background site and 0.81 ± 0.31 at the suburban site, abiding by the cluster activation theory. However, ozonolysis of monoterpenes (particularly α-pinene) might also drive NPF, particularly in the afternoon. These reactions also contributed to the growth of nucleation mode particles, which was largely explained by sulfuric acid vapor (73.6 ± 10% at the background site and 60.4 ± 9.8% at the suburban site). In contrast, the oxidations of isoprene, β-pinene and aromatics (particularly xylenes and trimethylbenzenes) were found to participate in the growth of Aitken mode particles.
Keywords: Atmospheric nanoparticle
New particle formation
Particle growth
Sulfuric acid vapor
Volatile organic compound
Publisher: Elsevier Ltd
Journal: Chemosphere 
ISSN: 0045-6535
EISSN: 1879-1298
DOI: 10.1016/j.chemosphere.2017.11.060
Rights: © 2017 Elsevier Ltd. All rights reserved.
© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
The following publication Lyu, X. P., Guo, H., Cheng, H. R., & Wang, D. W. (2017). New particle formation and growth at a suburban site and a background site in Hong Kong. Chemosphere, 193, 664-674 is available at https://doi.org/10.1016/j.chemosphere.2017.11.060
Appears in Collections:Journal/Magazine Article

Files in This Item:
File Description SizeFormat 
Lyu_New_Particle_Formatigrowth.pdfPre-Published version1.71 MBAdobe PDFView/Open
Open Access Information
Status open access
File Version Final Accepted Manuscript
Access
View full-text via PolyU eLinks SFX Query
Show full item record

Page views

77
Citations as of May 15, 2022

Downloads

6
Citations as of May 15, 2022

SCOPUSTM   
Citations

12
Last Week
0
Last month
Citations as of May 12, 2022

WEB OF SCIENCETM
Citations

10
Last Week
0
Last month
Citations as of May 19, 2022

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.