Characterization of Aerosol Aging Potentials at Suburban Sites in Northern and Southern China Utilizing a Potential Aerosol Mass (Go:PAM) Reactor and an Aerosol Mass Spectrometer

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Jinjian Li
  • Qianyun Liu
  • Yongjie Li
  • Tengyu Liu
  • Dandan Huang
  • Jing Zheng
  • Wenfei Zhu
  • Min Hu
  • Yusheng Wu
  • Shengrong Lou
  • Åsa M. Hallquist
  • Mattias Hallquist
  • Francesco Canonaco
  • André S. H. Prévôt
  • Jimmy C. H. Fung
  • Alexis K. H. Lau
  • Jian Zhen Yu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)5629-5649
Journal / PublicationJournal of Geophysical Research: Atmospheres
Volume124
Issue number10
Early online date23 Apr 2019
Publication statusPublished - 27 May 2019

Abstract

Aerosol mass spectrometry was used to characterize submicron aerosols before and after aging in a Gothenburg Potential Aerosol Mass (Go:PAM) reactor at two suburban sites in China, one in northern China at Changping (CP), Beijing, and a second in southern China at Hong Kong (HK). Organic aerosol (OA) dominated in the ambient nonrefractory particulate matter <1 μm (NR-PM1) for both CP (42–71%) and HK (43–61%), with a large contribution from secondary OA factors that were semivolatile oxygenated (SVOOA) and low-volatility oxygenated (LVOOA). Under constant OH exposure, OA enhancement (78–98%) dominated the NR-PM1 mass increment at both sites, while nitrate was enhanced the most among the inorganic species (7–9%). Overall, the CP site exhibited higher OA oxidation potential and more enhancement of SVOOA than LVOOA (7.5 vs. 2.7 μg/m3), but the reverse was observed in HK (0.8 vs. 2.6 μg/m3). In CP, more enhancement of the less oxygenated SVOOA suggests that aerosol aging was more sensitive to the abundant locally emitted primary OA and volatile organic compound precursors. On the contrary, the more formation of the highly oxidized LVOOA in HK indicates that aerosol aging mainly escalated the degree of oxygenation of OA as ambient aerosol was already quite aged and there was a lack of volatile organic compound precursors. The comparative measurements using the same oxidation system reveal distinct key factors and mechanisms that influence secondary aerosol formation in two suburban locations in China, providing scientific insights to assist formulation of location-specific mitigation measures of secondary pollution.

Research Area(s)

  • aerosol mass spectrometer, potential aerosol mass, suburban Beijing, suburban Hong Kong

Citation Format(s)

Characterization of Aerosol Aging Potentials at Suburban Sites in Northern and Southern China Utilizing a Potential Aerosol Mass (Go:PAM) Reactor and an Aerosol Mass Spectrometer. / Li, Jinjian; Liu, Qianyun; Li, Yongjie; Liu, Tengyu; Huang, Dandan; Zheng, Jing; Zhu, Wenfei; Hu, Min; Wu, Yusheng; Lou, Shengrong; Hallquist, Åsa M.; Hallquist, Mattias; Chan, Chak K.; Canonaco, Francesco; Prévôt, André S. H.; Fung, Jimmy C. H.; Lau, Alexis K. H.; Yu, Jian Zhen.

In: Journal of Geophysical Research: Atmospheres, Vol. 124, No. 10, 27.05.2019, p. 5629-5649.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review