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Arctic/North Atlantic atmospheric variability causes severe PM10 events in South Korea

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Title
Arctic/North Atlantic atmospheric variability causes severe PM10 events in South Korea
Other Titles
북극/북대서양 대기 변동성의 대한민국의 심한 미세먼지(PM10) 이벤트 영향
Authors
김정훈
김맹기
Kim, Seong-Joong
Kim, Joo-Hong
예상욱
이상현
이영석
Keywords
Atmospheric stagnantPM10 transportParticulate MatterSevere PM10 eventsTeleconnectionVentilation effectWave propagation
Issue Date
2024
Citation
김정훈, et al. 2024. "Arctic/North Atlantic atmospheric variability causes severe PM10 events in South Korea". SCIENCE OF THE TOTAL ENVIRONMENT, 914(0): 169714-0.
Abstract
Severe PM10 (particulate matter with a diameter of <10 μm) events in South Korea are known to be caused by stable atmospheric circulation conditions related to high-pressure anomalies in the upper troposphere. However, research on why these atmospheric circulation patterns occur is unknown. In this study, we propose new large-scale teleconnection pathways that cause severe PM10 events during the midwinter in South Korea. This study investigated instances of extremely high (EH)-PM10 in South Korea during mid-winter and examined the corresponding atmospheric teleconnection patterns to identify the factors contributing to EH-PM10 events. K-means clustering analysis revealed that EH-PM10 instances were associated with two large-scale teleconnection patterns. Cluster 1 exhibited a wave train pattern originating in the North Atlantic that developed from Eurasia to the Korean Peninsula. Cluster 2 was associated with a wave-like teleconnection pattern from the Barents-Kara Sea to the Korean Peninsula. The Rossby waves, triggered by the North Atlantic and the Arctic, propagated and weakened the surface pressure system. This led to a high-pressure anomaly over the Korean Peninsula, reducing atmospheric ventilation and causing a rapid increase in PM10 concentration within a few days. Furthermore, an experiment involving a linear baroclinic model established that atmospheric forcing in upstream regions has the potential to induce large-scale atmospheric teleconnection patterns, resulting in EH-PM10 cases in South Korea. These findings emphasize the ventilation effect and transport of PM10 concentrations modulated by two large-scale teleconnection patterns originating from the Arctic and North Atlantic, leading to EH-PM10 events in South Korea. Understanding this combined phenomenon may assist in the implementation of emission reduction measures based on the results of short-term forecasts of severe PM10 events.
URI
https://repository.kopri.re.kr/handle/201206/15089
DOI
http://dx.doi.org/10.1016/j.scitotenv.2023.169714
Type
Article
Station
해당사항없음
Indexed
SCIE
Appears in Collections  
2023-2023, Development and Application of the Earth System Model-based Korea Polar Prediction System (KPOPS-Earth) for the Arctic and Midlatitude High-impact Weather Events (23-23) / Kim, Joo-Hong (PE23010)
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