Influence of atmospheric conditions on sulfuric acid-dimethylamine-ammonia-based new particle formation

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Hao Li
  • An Ning
  • Jie Zhong
  • Haijie Zhang
  • Ling Liu
  • Yunling Zhang
  • Xiuhui Zhang
  • Hong He

Detail(s)

Original languageEnglish
Article number125554
Journal / PublicationChemosphere
Volume245
Online published10 Dec 2019
Publication statusPublished - Apr 2020
Externally publishedYes

Abstract

A recent quantitative measurement of rates of new particle formation (NPF) in urban Shanghai showed that the high rates of NPF can be largely attributed to the sulfuric acid (SA)-dimethylamine (DMA) nucleation due to relatively high DMA concentration in urban atmosphere (Yao et al., Science. 2018, 361, 278). In certain atmospheric conditions, the release of DMA is accompanied with the emission of high concentration of ammonia. As a result, the ammonia (A) may participate in SA-DMA-based NPF. However, the main sources of DMA and A can be different, thereby leading to different mechanism for the SA-DMA-A-based nucleation under different atmospheric conditions. Near industrial sources with relatively high DMA concentration of 108 molecules cm−3, the contribution of binary SA-DMA nucleation to cluster formation is 61% at 278 K, representing a dominant pathway for NPF. However, in the region not too close to major source of DMA emission, e.g., near agriculture farmland, the routes involving ternary SA-DMA-A nucleation make a 64% contribution at 278 K with DMA concentration of 107 molecules cm−3, showing that A has marked impact on the cluster formation. Under such a condition, we predict that coexisting DMA and A could be detected in the process of NPF. Moreover, at winter temperatures or at higher altitudes, our calculations suggest that the clustering of initial clusters likely involve ternary SA-DMA-A clusters rather than binary SA-DMA clusters. These new insights may be helpful to analyze and predict atmospheric-condition-dependent NFP in either urban or rural regions and/or in different season of the year.

Research Area(s)

  • Agricultural sources, Atmospheric conditions, Enhancement strength, Industrial sources, New particle formation, Nucleation mechanism

Citation Format(s)

Influence of atmospheric conditions on sulfuric acid-dimethylamine-ammonia-based new particle formation. / Li, Hao; Ning, An; Zhong, Jie et al.
In: Chemosphere, Vol. 245, 125554, 04.2020.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review