New particle formation events observed at King Sejong Station, Antarctic Peninsula – Part 1: Physical characteristics and contribution to cloud condensation nuclei
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Published:2019-06-06
Issue:11
Volume:19
Page:7583-7594
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ISSN:1680-7324
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Container-title:Atmospheric Chemistry and Physics
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language:en
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Short-container-title:Atmos. Chem. Phys.
Author:
Kim Jaeseok, Yoon Young Jun, Gim YeontaeORCID, Choi Jin Hee, Kang Hyo Jin, Park Ki-TaeORCID, Park Jiyeon, Lee Bang Yong
Abstract
Abstract. The physical characteristics of aerosol particles during
particle bursts observed at King Sejong Station in the Antarctic Peninsula from
March 2009 to December 2016 were analyzed. This study focuses on the seasonal
variation in parameters related to particle formation such as the occurrence,
formation rate (FR) and growth rate (GR), condensation sink (CS) and source
rate of condensable vapor. The number concentrations during new particle
formation (NPF) events varied from 1707 to 83 120 cm−3, with an
average of 20 649 ± 9290 cm−3, and the duration of the NPF
events ranged from 0.6 to 14.4 h, with a mean of 4.6±1.5 h. The NPF
event dominantly occurred during austral summer period (∼72 %). The
measured mean values of FR and GR of the aerosol particles were 2.79±1.05 cm−3 s−1 and 0.68±0.27 nm h−1, respectively,
showing enhanced rates in the summer season. The mean value of FR at King
Sejong Station was higher than that at other sites in Antarctica, at
0.002–0.3 cm−3 s−1, while those of growth rates were relatively similar to the results observed by previous studies, at 0.4–4.3 nm h−1. The derived average
values of CS and source rate of condensable vapor were (6.04±2.74)×10-3 s−1 and (5.19±3.51)×104 cm−3 s−1, respectively. The contribution of particle
formation to cloud condensation nuclei (CCN) concentration was also
investigated. The CCN concentration during the NPF period increased
by approximately 11 % compared with the background concentration. In
addition, the effects of the origin and pathway of air masses on the
characteristics of aerosol particles during a NPF event were determined. The
FRs were similar regardless of the origin and pathway, whereas the GRs of
particles originating from the Antarctic Peninsula and the Bellingshausen
Sea, at 0.77±0.25 and 0.76±0.30 nm h−1, respectively, were
higher than those of particles originating from the Weddell Sea (0.41±0.15 nm h−1).
Funder
Korea Polar Research Institute
Publisher
Copernicus GmbH
Subject
Atmospheric Science
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