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: 5.509 IF 5.509
  • IF 5-year value: 5.689 IF 5-year
    5.689
  • CiteScore value: 5.44 CiteScore
    5.44
  • SNIP value: 1.519 SNIP 1.519
  • SJR value: 3.032 SJR 3.032
  • IPP value: 5.37 IPP 5.37
  • h5-index value: 86 h5-index 86
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 161 Scimago H
    index 161
Discussion papers
https://doi.org/10.5194/acp-2018-1106
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2018-1106
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 12 Nov 2018

Research article | 12 Nov 2018

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

Assessment of dicarbonyl contributions to secondary organic aerosols over China using RAMS-CMAQ

Jialin Li1, Meigen Zhang1,2,3, Guiqian Tang1, Yele Sun1,2,3, Fangkun Wu1, and Yongfu Xu1,3 Jialin Li et al.
  • 1State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
  • 2Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
  • 3University of Chinese Academy of Sciences, Beijing 100049, China

Abstract. The concentration of secondary organic aerosol (SOA) is underestimated by one to two orders of magnitude in current model studies. Recent research suggests that the aqueous irreversible uptake of dicarbonyls contributes to the production of SOA, although few models have included this pathway. Glyoxal, an important representative component of dicarbonyls in models, is significantly underestimated. We therefore incorporated the aqueous irreversible uptake of dicarbonyls into the regional air quality modeling system RAMS-CMAQ (the Regional Atmospheric Modeling System-Community Multiscale Air Quality) to evaluate the contribution of dicardonyls to SOA, and we then assess the impact of the underestimation of glyoxal on the production of SOA in China during two time periods: June 3 to July 11, 2014 (episode 1) and October 14 to November 14, 2014 (episode 2). When the aqueous irreversible uptake process was added, the modeled mean concentration of SOA in episode 1 increased by 1.57 μg/m3, which explains 15.0 % of the unaccounted source of SOA. By contrast, the increase in the concentration of SOA in episode 2 was small as a result of the lower liquid water content and the lower amount of dicarbonyls produced from biogenic precursors in the fall. On this basis, when the glyoxal simulation was improved, the modeled mean dicarbonyl-derived SOA (AORGCJ) increased by a factor of 2 in both episodes. AORGCJ in episode 1 contributed, on average, 39.0 % of the total concentration of SOA and the increase in this contribution represented 26.7 % of the unaccounted concentration of SOA, whereas the mean AORGCJ in episode 2 accounted for 18.5 % of total concentration of SOA. Based on the results for episode 1, the mean AORGCJ in summer over China was generally higher in the east than in the west, with the highest value (5–10 μg/m3) in the areas between the lower reaches of the Yellow and Yangtze rivers and in the Sichuan Basin. The contribution of AORGCJ to the concentration of SOA varied from 10 to 90 % throughout China, with the highest contributions (70–90 %) in the coastal regions and offshore along the East China Sea to the South China Sea and in the southwestern regions.

Jialin Li 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
Jialin Li et al.
Viewed  
Total article views: 339 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
254 80 5 339 19 1 3
  • HTML: 254
  • PDF: 80
  • XML: 5
  • Total: 339
  • Supplement: 19
  • BibTeX: 1
  • EndNote: 3
Views and downloads (calculated since 12 Nov 2018)
Cumulative views and downloads (calculated since 12 Nov 2018)
Viewed (geographical distribution)  
Total article views: 334 (including HTML, PDF, and XML) Thereof 332 with geography defined and 2 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 22 Mar 2019
Publications Copernicus
Download
Short summary
Simulations of secondary organic aerosol (SOA) concentrations in China with SOA aqueous-phase formation pathway updated and glyoxal simulation improved reveal that dicarbonyl-derived SOA (AORGCJ) can explain a significant fraction of the unaccounted SOA sources, especially in summer. The mean AORGCJ can account for 39.0 % of the total concentration of SOA in summer, while AORGCJ in winter contributes, on average, 18.5 % to the total SOA concentration.
Simulations of secondary organic aerosol (SOA) concentrations in China with SOA aqueous-phase...
Citation