Preprints
https://doi.org/10.5194/acp-2020-1270
https://doi.org/10.5194/acp-2020-1270

  02 Feb 2021

02 Feb 2021

Review status: this preprint is currently under review for the journal ACP.

Large seasonal and interannual variations of biogenic sulfur compounds in the Arctic atmosphere (Svalbard; 78.9° N, 11.9° E)

Sehyun Jang1,, Ki-Tae Park2,3,, Kitack Lee1, Young Jun Yoon2, Kitae Kim2,3, Hyun Young Chung2,3, Silvia Becagli4, Bang Yong Lee2, Rita Traversi4, Konstantinos Eleftheriadis5, Radovan Krejci6, and Ove Hermansen7 Sehyun Jang et al.
  • 1Division of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, 37673, Korea
  • 2Korea Polar Research Institute (KOPRI), 26 Songdomirae-ro, Yeonsu-gu, Incheon, 21990, Korea
  • 3University of Science and Technology, Daejeon, 34113, Korea
  • 4Institute of Polar Science, ISP-CNR, via Torino, 155, Venezia Mestre, (VE) 30172, Italy
  • 5N.C.S.R. “Demokritos”, Environmental Radioactivity Laboratory, Ag. Paraskevi, 15341, Attiki, Greece
  • 6Department of Environmental Science and Analytical Chemistry & Bolin Centre for Climate Research, Stockholm University, Stockholm 10691, Sweden
  • 7Norwegian Institute for Air Research, Kjeller, Norway
  • These authors contributed equally to this work.

Abstract. Seasonal to interannual variations in the concentrations of sulfur aerosols (< 2.5 micron in diameter; non sea-salt sulfate: NSS-SO42−; anthropogenic sulfate: Anth-SO42−; biogenic sulfate: Bio-SO42−; methanesulfonic acid: MSA) in the Arctic atmosphere were investigated using measurements of the chemical composition of aerosols collected at Ny-Ålesund, Svalbard (78.9° N, 11.9° E) from 2015 to 2019. In all measurement years the concentration of NSS-SO42− was highest during the pre-bloom period and rapidly decreased towards summer. During the pre-bloom period we found a strong correlation between NSS-SO42− and Anth-SO42− because more than 50 % of the NSS-SO42− measured during the pre-bloom period was Anth-SO42−, which originated in the northern Europe and was subsequently transported to the Arctic through the Arctic haze. Unexpected increases in the concentration of Bio-SO42− aerosols (an oxidation product of dimethylsulfide: DMS) were occasionally found during the pre-bloom period and were obviously not produced in ocean areas in the proximity of Ny-Ålesund, but probably originated in distant regions to the south (i.e., the North Atlantic Ocean and the Norwegian Sea). The concentration of MSA (another oxidation product of DMS) during the pre-bloom period contrarily remained low, which was largely because of the greater loss of MSA relative to Bio-SO42− and the suppression of condensation of gaseous MSA onto existing particles during the northward transport of air masses containing these components from distant ocean source regions. Moreover, the low light intensity during the pre-bloom period resulted in a low concentration of photochemically activated oxidant species including OH radicals and BrO and thus more favoured the oxidation pathway of DMS to Bio-SO42− rather than to MSA, which acted to lower the MSA concentration at Ny-Ålesund. The concentration of MSA peaked in May or June, and was positively correlated with ocean biomass in the Greenland and Barents seas around Svalbard. As a result, the mean ratio of MSA to the DMS-derived aerosols was low (0.09 ± 0.07) for the pre-bloom period but high (0.32 ± 0.15) for the bloom and post-bloom periods. Our results indicate that the contribution of MSA to the growth of the newly formed particles to a size at which they could act as condensation nuclei was considerably greater during the bloom and post-bloom periods than during the pre-bloom period.

Sehyun Jang et al.

Status: open (until 30 Mar 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2020-1270', Anonymous Referee #2, 22 Feb 2021 reply

Sehyun Jang et al.

Sehyun Jang et al.

Viewed

Total article views: 153 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
111 38 4 153 12 1 4
  • HTML: 111
  • PDF: 38
  • XML: 4
  • Total: 153
  • Supplement: 12
  • BibTeX: 1
  • EndNote: 4
Views and downloads (calculated since 02 Feb 2021)
Cumulative views and downloads (calculated since 02 Feb 2021)

Viewed (geographical distribution)

Total article views: 199 (including HTML, PDF, and XML) Thereof 199 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 24 Feb 2021
Download
Short summary
This study provides comprehensive datasets encompassing seasonal and interannual variations in sulfate and MSA concentration in aerosol particles in the Arctic atmosphere. As oxidation products of DMS have important roles in new particle formation and growth, we focused on factors affecting their variability and the branching ratio of DMS oxidation. We found the strong correlation between the ratio and the light condition and chemical property of atmospheric particles. We believe that our study.
Altmetrics