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Seasonal variations in physical characteristics of aerosol particles at the King Sejong Station, Antarctic Peninsula

Cited 1 time in scopus
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Title
Seasonal variations in physical characteristics of aerosol particles at the King Sejong Station, Antarctic Peninsula
Other Titles
세종기지 대기중 입자의 계절적인 물리 특성
Authors
Kim, Jaeseok
Lee, Bang Yong
Park, Ki-Tae
Choi, Jin Hee
Kang, Hyo Jin
Gim, Yeontae
Yoon, Young Jun
Subject
Meteorology & Atmospheric Sciences
Keywords
Cloud Condensation Nuclei; King Sejong Station; aerosol
Issue Date
2017
Citation
Kim, Jaeseok, et al. 2017. "Seasonal variations in physical characteristics of aerosol particles at the King Sejong Station, Antarctic Peninsula". ATMOSPHERIC CHEMISTRY AND PHYSICS, 17(21): 12985-12999.
Abstract
Seasonal variability in the physical characteristics of aerosol particles sampled from the King Sejong Station in the Antarctic Peninsula was investigated over the period between March 2009 and February 2015. Clear seasonal cycles for the total particle concentration (CN) were observed. The mean monthly concentration of particles larger than 2.5 nm (CN2.5) was highest during the austral summer, with an average value of 1080.39 ± 595.05 cm-3, and lowest during the austral winter, with a mean value of 197.26 ± 71.71 cm-3. The seasonal patterns in the concentrations of cloud condensation nuclei (CCN) and CN coincide, with both concentrations being at a minimum in winter and maximum in summer. The measured CCN spectra were approximated by fitting a power law function relating the number of CCN for a given supersaturation (SS) to each SS value, with fitting coefficients C and kT. The values for C varied from 6.35 cm-3 to 837.24 cm-3, with a mean of 171.48 ± 62.00 cm-3. The values for kT ranged from 0.07 to 2.19, with a mean of 0.41 ± 0.10. In particular, the kT values during the austral summer were higher than those during the winter, indicating that aerosol particles are more sensitive to SS changes during summer. Furthermore, the annual mean hygroscopicity parameter, kappa, was estimated as 0.15±0.05, for a SS of 0.4%. The effects of the origin and pathway travelled by the air mass on the physical characteristics of the aerosol particles were also determined. The modal diameter of aerosol particles originating in the South Pacific Ocean showed a seasonal variation varying from 0.023 μm in winter to 0.034 μm in summer for the Aitken mode, and from 0.086 μm in winter to 0.109 μm in summer for the accumulation mode
URI
http://repository.kopri.re.kr/handle/201206/6010
DOI
http://dx.doi.org/10.5194/acp-17-12985-2017
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