부산지역 대기경계층 고도의 계절 변화 특성–수도권과의 비교 연구(VI) (Characteristics of Seasonal Variations of Planetary Boundary Layer Heights in Busan - A Comparative Study of Busan vs. Seoul Metropolitan Area (VI))

서지정보

· 발행기관 : 한국환경과학회
· 수록지 정보 : 한국환경과학회지 / 33권 / 12호 / 883 ~ 899페이지
· 저자명 : 김민성, 오상석, 박문수, 강민수, 엄준식, 조현영, 김철희

초록

This study explores the planetary boundary layer height (PBLH) in Busan during 2020 and compares it with that of Seoul, with a focus on how regional characteristics influence PBLH. Monthly and daily PBLH variations were analyzed using both ECMWF Reanalysis 5th generation (ERA5) data and ceilometer measurements. The Weather Research Forecast (WRF) model was also utilized to simulate PBLH for season-representative cases across the year. The results indicate that the PBLH in Seoul tends to be higher than that in Busan likely due to Seoul’s inland location, while Busan, being a coastal city heavily influenced by the ocean, exhibits lower PBLH, particularly in summer. WRF model simulations revealed that the high humidity advected from the ocean contributes to a more stable atmosphere in Busan, suppressing local PBLH growth. Notably, during summer, the PBLH in Busan was more than twice as low as that in Seoul, despite there being no significant differences in key micrometeorological factors such as friction velocity and sensible heat flux between the two cities. This suggests that the PBLH in Busan is affected primarily by high humidity and marine boundary layer advection, especially during onshore wind flows during the summertime. This study provides valuable insights into how regional characteristics impact PBLH in both inland and coastal cities, offering a foundation for improving regional air pollution forecasting in coastal areas such as Busan.

영어초록

This study explores the planetary boundary layer height (PBLH) in Busan during 2020 and compares it with that of Seoul, with a focus on how regional characteristics influence PBLH. Monthly and daily PBLH variations were analyzed using both ECMWF Reanalysis 5th generation (ERA5) data and ceilometer measurements. The Weather Research Forecast (WRF) model was also utilized to simulate PBLH for season-representative cases across the year. The results indicate that the PBLH in Seoul tends to be higher than that in Busan likely due to Seoul’s inland location, while Busan, being a coastal city heavily influenced by the ocean, exhibits lower PBLH, particularly in summer. WRF model simulations revealed that the high humidity advected from the ocean contributes to a more stable atmosphere in Busan, suppressing local PBLH growth. Notably, during summer, the PBLH in Busan was more than twice as low as that in Seoul, despite there being no significant differences in key micrometeorological factors such as friction velocity and sensible heat flux between the two cities. This suggests that the PBLH in Busan is affected primarily by high humidity and marine boundary layer advection, especially during onshore wind flows during the summertime. This study provides valuable insights into how regional characteristics impact PBLH in both inland and coastal cities, offering a foundation for improving regional air pollution forecasting in coastal areas such as Busan.

참고자료

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