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Discussion papers
https://doi.org/10.5194/acp-2019-811
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2019-811
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 19 Nov 2019

Submitted as: research article | 19 Nov 2019

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

Uptake selectivity of Methanesulfonic Acid (MSA) on fine particles over polynya regions of the Ross Sea, Antarctica

Jinpei Yan1,2, Jinyoung Joung3, Miming Zhang1,2, Federico Bianchi4, Yee Jun Tham4, Suqing Xu1,2, Qi Lin1,2, Shuhui Zhao1,2, Lei Li5, and Liqi Chen1,2 Jinpei Yan et al.
  • 1Key Laboratory of Global Change and Marine-Atmospheric Chemistry, Xiamen 361005, China
  • 2Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
  • 3Korea Polar Research Institute, 26 Songdomirae-ro, Yeonsu-gu, Incheon 21990, Republic of Korea
  • 4Institute for Atmospheric and Earth System Research; University of Helsinki, 00014, Finland
  • 5Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou 510632, China

Abstract. The uptake of methanesulfonic acid (MSA) on existing particles is a major route of the particulate MSA formation, however, MSA uptake on different particles is still lack of knowledge. Characteristics of MSA uptake on different aerosol particles were investigated in polynya regions of the Ross Sea, Antarctica. Particulate MSA mass concentrations, as well as aerosol populations and size distributions, were observed simultaneously for the first time to access the uptake of MSA on different particles. The results showed that MSA mass concentration did not always reflect MSA particle population in the marine atmosphere. MSA uptake on aerosol particles increased the particle size and changed aerosol chemical compositions, but did not increase the particle population. The uptake rates of MSA on existing particles were significantly influenced by aerosol chemical properties. The favor uptake of MSA occurred on the sea salt particles, as MSA-Na and MSA-Mg particles were abundant in the Na and Mg particles, accounting for 0.43 ± 0.21 and 0.41 ± 0.20 of the total Na and Mg particles, respectively. However, acidic and hydrophobic particles suppressed the MSA uptake, as MSA-EC and MSA-SO42− accounted only 0.24 ± 0.68 and 0.26 ± 0.47 of the total EC and SO42− particles, respectively. The results extended the knowledge of the formation and environmental behavior of MSA in the marine atmosphere.

Jinpei Yan et al.
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Short summary
Methanesulfonic acid (MSA), is important to the CCN in the MBL. The uptake of MSA on particles is lack of knowledge. The characteristics of MSA uptake on different particles were studied in the Southern Ocean. The MSA uptake on different particles was associated with particle properties. The favor uptake on sea salt particles was presented, while acidic and hydrophobic particles would suppress the MSA uptake. The results extended the knowledge of MSA formation and behavior in the atmosphere.
Methanesulfonic acid (MSA), is important to the CCN in the MBL. The uptake of MSA on particles...
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