Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.668 IF 5.668
  • IF 5-year value: 6.201 IF 5-year
    6.201
  • CiteScore value: 6.13 CiteScore
    6.13
  • SNIP value: 1.633 SNIP 1.633
  • IPP value: 5.91 IPP 5.91
  • SJR value: 2.938 SJR 2.938
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 174 Scimago H
    index 174
  • h5-index value: 87 h5-index 87
Discussion papers
https://doi.org/10.5194/acp-2019-540
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2019-540
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 25 Jul 2019

Submitted as: research article | 25 Jul 2019

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Atmospheric Chemistry and Physics (ACP).

Effects of SO2 on optical properties of secondary organic aerosol generated from photooxidation of toluene under different relative humidity

Wenyu Zhang1,2, Weigang Wang1,2, Junling Li1,2, Chao Peng1,2, Kun Li4, Li Zhou5, Bo Shi1,2, Yan Chen1,2, Mingyuan Liu1,2, and Maofa Ge1,2,3 Wenyu Zhang et al.
  • 1State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
  • 2University of Chinese Academy of Sciences, Beijing 100049, P. R. China
  • 3Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, P. R. China
  • 4Air Quality Research Division, Environment and Climate Change Canada, Toronto, Ontario M3H 5T4, Canada
  • 5College of Architecture and Environment, Sichuan University, Chengdu, China

Abstract. Secondary organic aerosol (SOA) have great impacts on air quality, climate change and human health. The composition and physicochemical properties of SOA differ a lot for they originated under different atmospheric conditions and from various precursors and oxidations. In this work, photooxidation experiments of toluene were performed under four conditions (dry, dry with SO2, wet, and wet with SO2) to investigate the effect of SO2 under different relative humidity on the composition and optical properties of SOA at the wavelength of 375 nm and 532 nm. According to our results, the increase of humidity enhances not only light absorption, but also scattering property of SOA. Highly conjugated oligomers formed through multiphase reaction might be the reasons of this phenomenon. Adding SO2 slightly lower the real part of complex refractive index (n) of SOA: ndry, SO2 < ndry, nwet, SO2 < nwet, which might be a result of the partitioning of low oxidation state products, such as alcohols, esters, and so on. The imaginary part of complex refractive index (k) are enhanced under condition dry with SO2 compared to condition dry might because of the enhancement of charge transfer complexes, a great contributor to ultraviolet and visible light absorption. Condition wet with SO2 shows the combined effect of SO2 and humidity condition. The extinction properties of toluene-derived SOA under condition wet and SO2 are increased about 30 % compared to condition dry. Our results suggest that various atmospheric conditions will affect the composition and optical proprieties of SOA, which have significant implications for evaluating the impacts of SOA on the rapid-formation of regional haze, global radiative balance and climate change.

Wenyu Zhang et al.
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Login for Authors/Co-Editors] [Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Wenyu Zhang et al.
Wenyu Zhang et al.
Viewed  
Total article views: 461 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
362 97 2 461 17 1 7
  • HTML: 362
  • PDF: 97
  • XML: 2
  • Total: 461
  • Supplement: 17
  • BibTeX: 1
  • EndNote: 7
Views and downloads (calculated since 25 Jul 2019)
Cumulative views and downloads (calculated since 25 Jul 2019)
Viewed (geographical distribution)  
Total article views: 434 (including HTML, PDF, and XML) Thereof 429 with geography defined and 5 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 07 Dec 2019
Publications Copernicus
Download
Short summary
We investigated the effect of SO2 under different humidity on optical properties of toluene-derived SOA under four conditions with CRDs and PAX at 532 and 375 nm, respectively. Our results showed that SO2 under different humidity can change the refractive complex index of toluene SOA by influencing the multiphase processes and altering the aerosol chemical compositions. Different atmospheric conditions could affect the properties of toluene SOA, as well as the global radiative balance.
We investigated the effect of SO2 under different humidity on optical properties of...
Citation