• Journal of Atmospheric and Environmental Optics
  • Vol. 17, Issue 2, 213 (2022)
Feng ZHAO1、2、* and Yajuan FENG2
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    DOI: 10.3969/j.issn.1673-6141.2022.02.003 Cite this Article
    ZHAO Feng, FENG Yajuan. Atmospheric physicochemical properties of 2-methylglyceric acid-sulfuric acid/methanesulfonic acid clusters[J]. Journal of Atmospheric and Environmental Optics, 2022, 17(2): 213 Copy Citation Text show less

    Abstract

    Atmospheric aerosols can affect the climate system of the earth by scattering or absorbing long-wave and short-wave radiation. As one of the aerosol tracers, 2-Methylglyceric acid has been observed frequently in atmospheric observations and nucleation experiments. Sulfuric acid and methanesulfonic acid, as very important aerosol precursors, have also received extensive attention and been widely studied. Therefore, 2-methylglyceric acid-sulfuric acid/methanesulfonic acid clusters were simulated based on the theory level of DF-MP2-F12/VDZ-F12 combined with M06-2X/6-311G(3df,3pd), and their physicochemical properties in the atmosphere were analyzed. The results show that 2-methylglyceric acid-sulfuric acid cluster and 2-methylglyceric acid-methanesulfonic acid cluster have the same Gibbs free energy temperature dependence. 2-Methylglyceric acid-sulfuric acid/methanesulfonic acid clusters will preferentially evaporate 2-methylglyceric acid molecules rather than sulfuric acid/methanesulfonic acid molecules, and the evaporation rate of 2-methylglyceric acid molecules increases rapidly with the increase of the cluster size. In addition, the Rayleigh scattering intensity and polarizability of 2-methylglycericacid-sulfuric acid/methanesulfonic acid clusters are calculated, which is helpful to understand the influence of the clusters on atmospheric radiation.
    ZHAO Feng, FENG Yajuan. Atmospheric physicochemical properties of 2-methylglyceric acid-sulfuric acid/methanesulfonic acid clusters[J]. Journal of Atmospheric and Environmental Optics, 2022, 17(2): 213
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