Wintertime subarctic new particle formation from Kola Peninsula sulfur emissions
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Published:2021-12-02
Issue:23
Volume:21
Page:17559-17576
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ISSN:1680-7324
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Container-title:Atmospheric Chemistry and Physics
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language:en
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Short-container-title:Atmos. Chem. Phys.
Author:
Sipilä Mikko, Sarnela Nina, Neitola Kimmo, Laitinen Totti, Kemppainen Deniz, Beck LisaORCID, Duplissy Ella-Maria, Kuittinen Salla, Lehmusjärvi TuuliORCID, Lampilahti Janne, Kerminen Veli-MattiORCID, Lehtipalo KatrianneORCID, Aalto Pasi P., Keronen PetriORCID, Siivola Erkki, Rantala Pekka A.ORCID, Worsnop Douglas R., Kulmala MarkkuORCID, Jokinen TuijaORCID, Petäjä TuukkaORCID
Abstract
Abstract. The metallurgical industry in the Kola Peninsula, north-west Russia, form,
after Norilsk, Siberia, the second largest source of air pollution in the
Arctic and subarctic domain. Sulfur dioxide (SO2) emissions from the
ore smelters are transported to wide areas, including Finnish Lapland. We
performed investigations on concentrations of SO2, aerosol precursor
vapours, aerosol and ion cluster size distributions together with chemical
composition measurements of freshly formed clusters at the SMEAR I station
in Finnish Lapland relatively close (∼ 300 km) to the Kola
Peninsula industrial sites during the winter 2019–2020. We show that highly
concentrated SO2 from smelter emissions is converted to sulfuric
acid (H2SO4) in sufficient concentrations to drive new particle
formation hundreds of kilometres downwind from the emission sources, even at
very low solar radiation intensities. Observed new particle formation is
primarily initiated by H2SO4–ammonia (negative-)ion-induced
nucleation. Particle growth to cloud condensation nuclei (CCN) sizes was
concluded to result from sulfuric acid condensation. However, air mass
advection had a large role in modifying aerosol size distributions, and
other growth mechanisms and condensation of other compounds cannot be fully
excluded. Our results demonstrate the dominance of SO2 emissions in
controlling wintertime aerosol and CCN concentrations in the subarctic
region with a heavily polluting industry.
Funder
H2020 European Research Council Academy of Finland Horizon 2020 Framework Programme
Publisher
Copernicus GmbH
Subject
Atmospheric Science
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