First-year sea ice leads to an increase in dimethyl sulfide-induced particle formation in the Antarctic Peninsula

• Published in: Science of The Total Environment
• Main Authors: Jang, Eunho, Park, Ki-Tae, Yoon, Young Jun, Kim, Kitae, Gim, Yeontae, Chung, Hyun Young, Lee, Kitack, Choi, Jinhee, Park, Jiyeon, Park, Sang-Jong, Koo, Ja-Ho, Fernández, Rafael P., Saiz-Lopez, A.
• Other Authors: National Research Foundation of Korea
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier BV 2022
• Subjects: Antarctic peninsula; Bromine monoxide; Dimethyl sulfide; First-Year Sea ice; New particle formation; Sulfurous particles; Antarctic; Antarctic Peninsula; Austral; King Sejong Station; The Antarctic; Antarc*; ice algae; Sea ice
• Online Access: http://hdl.handle.net/10261/257929; https://doi.org/10.1016/j.scitotenv.2021.150002; https://doi.org/10.13039/501100003725; https://api.elsevier.com/content/abstract/scopus_id/85114117581

9 pags, 4 figs. -- The datasets for atmospheric DMS, its oxidative products, and aerosol size distribution are available at the Korea Polar Data Center (https://dx. doi.org/doi:10.22663/KOPRI-KPDC-00001657.4). The sea ice data can be downloaded from the NSIDC website (https://nsidc.org/data/G02135/versions/3). The MODIS-Aqua products can be downloaded from the NASA Ocean Color website (https://oceandata.sci.gsfc.nasa. gov/MODIS-Aqua/). MIMOC is available at https:// www.pmel.noaa. gov/mimoc/. The PHYSAT products can be accessed from the PHYSAT website (https://log.cnrs.fr/Physat-332). The code for the CAM-Chem model is available at https://www2.acom.ucar.edu/gcm/cam-chem. -- Supplementary data to this article can be found online at https://doi.org/10.1016/j.scitotenv.2021.150002. Dimethyl sulfide (DMS) produced by marine algae represents the largest natural emission of sulfur to the atmosphere. The oxidation of DMS is a key process affecting new particle formation that contributes to the radiative forcing of the Earth. In this study, atmospheric DMS and its major oxidation products (methanesulfonic acid, MSA; non-sea-salt sulfate, nss-SO42-) and particle size distributions were measured at King Sejong station located in the Antarctic Peninsula during the austral spring-summer period in 2018-2020. The observatory was surrounded by open ocean and first-year and multi-year sea ice. Importantly, oceanic emissions and atmospheric oxidation of DMS showed distinct differences depending on source regions. A high mixing ratio of atmospheric DMS was observed when air masses were influenced by the open ocean and first-year sea ice due to the abundance of DMS producers such as pelagic phaeocystis and ice algae. However, the concentrations of MSA and nss-SO42- were distinctively increased for air masses originating from first-year sea ice as compared to those originating from the open ocean and multi-year sea ice, suggesting additional influences from the source regions of atmospheric oxidants. Heterogeneous chemical ...