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

Cited 1 time in wos
Cited 3 time in scopus
First-year sea ice leads to an increase in dimethyl sulfide-induced particle formation in the Antarctic Peninsula
Other Titles
일년빙에 의한 DMS기원 에어로졸 입자 형성 증가
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
Fernandez, Rafael P.
Saiz-Lopez, Alfonso
Environmental Sciences & Ecology
Dimethyl sulfideSulfurous particlesNew particle formationBromine monoxideFirst-Year Sea iceAntarctic peninsula
Issue Date
Jang, Eunho, et al. 2022. "First-year sea ice leads to an increase in dimethyl sulfide-induced particle formation in the Antarctic Peninsula". SCIENCE OF THE TOTAL ENVIRONMENT, 803: 1-9.
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 processes that actively occur over first-year sea ice tend to accelerate the release of bromine monoxide (BrO), which is the most efficient DMS oxidant in Antarctica. Model estimates for surface BrO confirmed that high BrO mixing ratios were closely associated with first-year sea ice, thus enhancing DMS oxidation. Consequently, the concentration of newly formed particles originated from first-year sea ice, which was a strong source area for both DMS and BrO was greater than from open ocean (high DMS but low BrO). These results indicate that first-year sea ice plays an important yet overlooked role in DMS-induced new particle formation in polar environments, where warming-induced sea ice changes are pronounced. (C) 2021 The Authors. Published by Elsevier B.V.
King Sejong Station
Appears in Collections  
2021-2021, Understanding of Antarctic climate and environment and assessments of global influence (21-21) / Kim, Seong-Joong (PE21030)
2021-2021, Investigation of ice microstructure properties for developing low-temperature purification and environment/energy materials (21-21) / Kim, Kitae (PE21120)
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