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New particle formation leads to enhanced cloud condensation nuclei concentrations in Antarctic Peninsula

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New particle formation leads to enhanced cloud condensation nuclei concentrations in Antarctic Peninsula
Other Titles
남극 세종과학기지에서 나노입자 생성이 구름형성응결핵 농도에 미치는 영향 규명
Park, Jiyeon
Kang, Hyo Jin
Gim, Yeontae
Jang, Eunho
Park, Ki-Tae
Park, Sang-Jong
Darius Ceburnis
Colin O'Dowd
Yoon, Young Jun
구름형성응결핵나노입자생성이벤트남극 에어로졸생성-성장-구름헝성
Issue Date
Park, Jiyeon, et al. 2023. "New particle formation leads to enhanced cloud condensation nuclei concentrations in Antarctic Peninsula". ATMOSPHERIC CHEMISTRY AND PHYSICS, 23(21): 13625-13646.
Few studies have investigated the impact of new particle formation (NPF) on cloud condensation nuclei (CCN) in remote Antarctica, and none has elucidated the relationship between NPF and CCN production. To address that knowledge gap, we continuously measured the number size distribution of 2.5-300 nm particles and CCN number concentrations at King Sejong Station in the Antarctic Peninsula from January 1 to December 31, 2018. Ninety-seven new particle formation (NPF) events were detected throughout the year. Clear annual and seasonal patterns of NPF were observed: high concentration and frequency of nucleation-mode particles in summer (December-February: 53 NPF cases) and undetected nucleation-mode particles in winter (June-August: no NPF cases). We estimated the spatial scale of NPF by multiplying the time during which a distinct nucleation mode can be observed at the sampling site by the locally measured wind speed. The estimated median spatial scale of NPF around Antarctic peninsula was found to be approximately 155 km, indicating the large-scale of NPF events. Air back-trajectory analysis revealed that 80 cases of NPF events were associated with air masses originating over the ocean, followed by sea-ice (12 cases), multiple (3 cases), and land (2 cases) regions. We present and discuss three major NPF categories: (1) marine NPF (2) sea-ice NPF, and (3) multiple NPF. Satellite-estimates for sea surface dimethylsulfoniopropionate (DMSP; a precursor of gaseous dimethyl sulfide) data showed that the production of oceanic biogenic precursors could be a key component in marine NPF events, whereas halogen compounds released from ice-covered areas could contribute to sea-ice NPF events. Terrestrial sources (wild life colonies, vegetation, and meltwater ponds) from Antarctica could affect aerosol production in multiple air masses. Out of 97 observed NPF events, 83 cases were characterized by the simultaneous increase in the CCN concentration by 2-270% (median 44%) in the following 1 to 36 hours (median 8 hours) after NPF events. Overall, Antarctic NPF events were found to be a significant source of particles with different physical characteristics and related to biogenic sources in and around the Antarctic Peninsula, which subsequently grew to cloud condensation nuclei.
King Sejong Station
Appears in Collections  
2023-2023, Understanding of Antarctic climate and environment and assessments of global influence (23-23) / Park, Ki-Tae (PE23030)
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