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Title: Field characterization of the PM 2:5 Aerosol Chemical Speciation Monitor: insights into the composition, sources, and processes of fine particles in eastern China

Abstract

A PM 2.5-capable aerosol chemical speciation monitor (Q-ACSM) was deployed in urban Nanjing, China, for the first time to measure in situ non-refractory fine particle (NR-PM 2.5) composition from 20 October to 19 November 2015, along with parallel measurements of submicron aerosol (PM 1) species by a standard Q-ACSM. Our results show that the NR-PM 2.5 species (organics, sulfate, nitrate, and ammonium) measured by the PM 2.5-Q-ACSM are highly correlated ( r 2 > 0.9) with those measured by a Sunset Lab OC/EC analyzer and a Monitor for AeRosols and GAses (MARGA). The comparisons between the two Q-ACSMs illustrated similar temporal variations in all NR species between PM 1 and PM 2.5, yet substantial mass fractions of aerosol species were observed in the size range of 1–2.5µm. On average, NR-PM 1-2.5 contributed 53% of the total NR-PM 2.5, with sulfate and secondary organic aerosols (SOAs) being the two largest contributors (26 and 27%, respectively). Positive matrix factorization of organic aerosol showed similar temporal variations in both primary and secondary OAs between PM 1 and PM 2.5, although the mass spectra were slightly different due to more thermal decomposition on the capture vaporizer of the PM 2.5-Q-ACSM. We observed an enhancement of SOAmore » under high relative humidity conditions, which is associated with simultaneous increases in aerosol pH, gas-phase species (NO 2, SO 2, and NH 3) concentrations and aerosol water content driven by secondary inorganic aerosols. These results likely indicate an enhanced reactive uptake of SOA precursors upon aqueous particles. Therefore, reducing anthropogenic NO x, SO 2, and NH 3 emissions might not only reduce secondary inorganic aerosols but also the SOA burden during haze episodes in China.« less

Authors:
 [1];  [2];  [3];  [4]; ORCiD logo [5];  [3];  [6];  [4];  [4];  [7];  [8];  [9];  [3];  [3]
  1. Nanjing Univ. of Information Science and Technology, Nanjing (China). Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology; Jiangsu Environmental Monitoring Center, Nanjing (China); Inst. National de l'Environnement Industriel et des Risques, Verneuil-en-Halatte (France); Univ. Paris-Saclay, Gif-sur-Yvette (France). Laboratoire des Sciences du Climat et de l’Environnement
  2. Nanjing Univ. of Information Science and Technology, Nanjing (China). Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology; Jiangsu Environmental Monitoring Center, Nanjing (China)
  3. Aerodyne Research, Inc., Billerica, MA (United States)
  4. Inst. National de l'Environnement Industriel et des Risques, Verneuil-en-Halatte (France)
  5. Chinese Academy of Sciences (CAS), Beijing (China). State Key Lab. of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Inst. of Atmospheric Physics; Chinese Academy of Sciences (CAS), Xiamen (China). Center for Excellence in Regional Atmospheric Environment, Inst. of Urban Environment; Univ. of Chinese Academy of Sciences, Beijing (China)
  6. Nanjing Univ. of Information Science and Technology, Nanjing (China). Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology
  7. Nanjing Handa Environmental Science and Technology Limited, Nanjing (China)
  8. Cyprus Inst., Environment Energy and Water Research Center, Nicosia (Cyprus)
  9. Paul Scherrer Inst., Villigen (Switzerland). Lab. for Atmospheric Chemistry
Publication Date:
Research Org.:
Aerosol Dynamics, Inc., Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1502410
Grant/Contract Number:  
SC0001673
Resource Type:
Accepted Manuscript
Journal Name:
Atmospheric Chemistry and Physics (Online)
Additional Journal Information:
Journal Name: Atmospheric Chemistry and Physics (Online); Journal Volume: 17; Journal Issue: 23; Journal ID: ISSN 1680-7324
Publisher:
European Geosciences Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Zhang, Yunjiang, Tang, Lili, Croteau, Philip L., Favez, Olivier, Sun, Yele, Canagaratna, Manjula R., Wang, Zhuang, Couvidat, Florian, Albinet, Alexandre, Zhang, Hongliang, Sciare, Jean, Prévôt, André S. H., Jayne, John T., and Worsnop, Douglas R. Field characterization of the PM2:5 Aerosol Chemical Speciation Monitor: insights into the composition, sources, and processes of fine particles in eastern China. United States: N. p., 2017. Web. doi:10.5194/acp-17-14501-2017.
Zhang, Yunjiang, Tang, Lili, Croteau, Philip L., Favez, Olivier, Sun, Yele, Canagaratna, Manjula R., Wang, Zhuang, Couvidat, Florian, Albinet, Alexandre, Zhang, Hongliang, Sciare, Jean, Prévôt, André S. H., Jayne, John T., & Worsnop, Douglas R. Field characterization of the PM2:5 Aerosol Chemical Speciation Monitor: insights into the composition, sources, and processes of fine particles in eastern China. United States. doi:10.5194/acp-17-14501-2017.
Zhang, Yunjiang, Tang, Lili, Croteau, Philip L., Favez, Olivier, Sun, Yele, Canagaratna, Manjula R., Wang, Zhuang, Couvidat, Florian, Albinet, Alexandre, Zhang, Hongliang, Sciare, Jean, Prévôt, André S. H., Jayne, John T., and Worsnop, Douglas R. Wed . "Field characterization of the PM2:5 Aerosol Chemical Speciation Monitor: insights into the composition, sources, and processes of fine particles in eastern China". United States. doi:10.5194/acp-17-14501-2017. https://www.osti.gov/servlets/purl/1502410.
@article{osti_1502410,
title = {Field characterization of the PM2:5 Aerosol Chemical Speciation Monitor: insights into the composition, sources, and processes of fine particles in eastern China},
author = {Zhang, Yunjiang and Tang, Lili and Croteau, Philip L. and Favez, Olivier and Sun, Yele and Canagaratna, Manjula R. and Wang, Zhuang and Couvidat, Florian and Albinet, Alexandre and Zhang, Hongliang and Sciare, Jean and Prévôt, André S. H. and Jayne, John T. and Worsnop, Douglas R.},
abstractNote = {A PM2.5-capable aerosol chemical speciation monitor (Q-ACSM) was deployed in urban Nanjing, China, for the first time to measure in situ non-refractory fine particle (NR-PM2.5) composition from 20 October to 19 November 2015, along with parallel measurements of submicron aerosol (PM1) species by a standard Q-ACSM. Our results show that the NR-PM2.5 species (organics, sulfate, nitrate, and ammonium) measured by the PM2.5-Q-ACSM are highly correlated (r2 > 0.9) with those measured by a Sunset Lab OC/EC analyzer and a Monitor for AeRosols and GAses (MARGA). The comparisons between the two Q-ACSMs illustrated similar temporal variations in all NR species between PM1 and PM2.5, yet substantial mass fractions of aerosol species were observed in the size range of 1–2.5µm. On average, NR-PM1-2.5 contributed 53% of the total NR-PM2.5, with sulfate and secondary organic aerosols (SOAs) being the two largest contributors (26 and 27%, respectively). Positive matrix factorization of organic aerosol showed similar temporal variations in both primary and secondary OAs between PM1 and PM2.5, although the mass spectra were slightly different due to more thermal decomposition on the capture vaporizer of the PM2.5-Q-ACSM. We observed an enhancement of SOA under high relative humidity conditions, which is associated with simultaneous increases in aerosol pH, gas-phase species (NO2, SO2, and NH3) concentrations and aerosol water content driven by secondary inorganic aerosols. These results likely indicate an enhanced reactive uptake of SOA precursors upon aqueous particles. Therefore, reducing anthropogenic NOx, SO2, and NH3 emissions might not only reduce secondary inorganic aerosols but also the SOA burden during haze episodes in China.},
doi = {10.5194/acp-17-14501-2017},
journal = {Atmospheric Chemistry and Physics (Online)},
number = 23,
volume = 17,
place = {United States},
year = {2017},
month = {12}
}

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