DSpace Collection: https://repository.kopri.re.kr/handle/201206/12126 2026-04-18T13:47:55Z 2026-04-18T13:47:55Z Spatiotemporal variability of the PM2.5 distribution and weather anomalies during severe pollution events: Observations from 462 air quality monitoring stations across South Korea Subin Han Yongmi Park Namkyu Noh Kim, Joo-Hong Jae-Jin Kim Baek-Min Kim Wonsik Choi https://repository.kopri.re.kr/handle/201206/16402 2025-11-06T08:12:59Z 2023-01-01T00:00:00Z Title: Spatiotemporal variability of the PM2.5 distribution and weather anomalies during severe pollution events: Observations from 462 air quality monitoring stations across South Korea Authors: Subin Han; Yongmi Park; Namkyu Noh; Kim, Joo-Hong; Jae-Jin Kim; Baek-Min Kim; Wonsik Choi Abstract: We investigated the nationwide spatiotemporal variability of PM2.5 during 49 severe PM2.5 pollution events based on observations from 462 air quality monitoring stations (AQMSs) across South Korea during 2015-2020. We calculated the coefficient of divergence (COD) and Pearson correlation coefficient (R) for the entire nationwide AQMS network with respect to the time series of average PM2.5 in the Seoul area. We identified three distinct spatial COD and R distribution patterns (Cases I-III) among 49 pollution events that can help to determine locations for additional AQMSs. We present the spatial distributions of time lag associated with PM2.5 pollution events at each monitoring station relative to the Seoul area, clarifying the inter-district transport of PM2.5. When the time lag was adjusted, the average R values at all AQMSs were greater than 0.74 for all cases (compared to 0.52-0.57 before adjustment), suggesting that characteristic weather patterns over East Asia drive nationwide severe PM2.5 pollution. Analyses of composite anomalies of meteorological variables (compared to climatology for 1991-2020) suggest that weakened surface winds accompanied by strong positive temperature anomalies in East Asia play an important role in the onset of severe PM2.5 pollution in Korea (for all classified cases). Our findings have elucidated the weather patterns that lead to severe PM2.5 pollution, variations of spatiotemporal PM2.5 pollution patterns over Korea on the regional scale with weather patterns, and pollution transport across air quality districts (inter-air-quality-district transport patterns). 2023-01-01T00:00:00Z The Effects of Abnormal Behavior of Jet Streams Induced by Polar Warming on Air Quality Changes in East Asia 최원식 https://repository.kopri.re.kr/handle/201206/13160 2022-03-24T07:15:41Z 2020-12-30T00:00:00Z Title: The Effects of Abnormal Behavior of Jet Streams Induced by Polar Warming on Air Quality Changes in East Asia Authors: 최원식 2020-12-30T00:00:00Z Test of underwater observation data transfer system using a pop-up buoy in extremely severe environment Park, Jae­Hun https://repository.kopri.re.kr/handle/201206/13156 2022-03-24T07:14:29Z 2020-07-30T00:00:00Z Title: Test of underwater observation data transfer system using a pop-up buoy in extremely severe environment Authors: Park, Jae­Hun 2020-07-30T00:00:00Z Study of radioactive isotopes for environmental samples from Antarctica Hur, Jang-Yong https://repository.kopri.re.kr/handle/201206/13141 2022-03-24T07:15:41Z 2020-07-28T00:00:00Z Title: Study of radioactive isotopes for environmental samples from Antarctica Authors: Hur, Jang-Yong 2020-07-28T00:00:00Z