2020
DOI: 10.5194/acp-20-3259-2020
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Uptake selectivity of methanesulfonic acid (MSA) on fine particles over polynya regions of the Ross Sea, Antarctica

Abstract: 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 lacking in knowledge. Characteristics of MSA uptake on different aerosol particles were investigated in polynya (an area of open sea water surrounded by ice) regions of the Ross Sea, Antarctica. Particulate MSA mass concentrations, as well as aerosol population and size distribution, were observed simultaneously for the first time to acc… Show more

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Cited by 27 publications
(28 citation statements)
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“…5c). The large seasonal difference in R Bio could be explained by known factors including the concentration of OH radicals (directly influenced by light intensity), air temperature (determining the oxidation pathway of DMS to either MSA or Bio-SO 2− 4 ), the chemical properties of existing particles (e.g., the black carbon concentration) (e.g., Saltzman et al, 1986;Gondwe et al, 2004;Yan et al, 2020b), and biological activities near observation site. Among those, a major factor is the concentration of OH radicals.…”
Section: Seasonal Variations In R Biomentioning
confidence: 99%
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“…5c). The large seasonal difference in R Bio could be explained by known factors including the concentration of OH radicals (directly influenced by light intensity), air temperature (determining the oxidation pathway of DMS to either MSA or Bio-SO 2− 4 ), the chemical properties of existing particles (e.g., the black carbon concentration) (e.g., Saltzman et al, 1986;Gondwe et al, 2004;Yan et al, 2020b), and biological activities near observation site. Among those, a major factor is the concentration of OH radicals.…”
Section: Seasonal Variations In R Biomentioning
confidence: 99%
“…Explicitly, the uptake of gaseous MSA onto particles was found to be sensitive to the chemical properties of those particles (Yan et al, 2020b). In particular, hydrophobic and acidic particles in the atmosphere tended to hinder the adhesion of gaseous MSA to particles, while alkaline sea-salt particles tended to accelerate the adhesion process (Pszenny, 1992;Jefferson et al, 1998;Yan et al, 2020b). Elemental carbon particles emitted from fossil fuel combustion are highly hydrophobic, and sulfates in the aerosol particles are acidic.…”
Section: Seasonal Variations In R Biomentioning
confidence: 99%
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“…The SO 2 can then be further oxidised to form sulfuric acid, sulfate aerosol and methanesulfonic acid (MSA; e.g. Yan et al, 2020). Aerosol emitted into the atmosphere can grow in size via condensation and coagulation.…”
Section: Introductionmentioning
confidence: 99%