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관측 기반 지상 대기오염물질 농도와 대기혼합고의 변동성 및 상관관계 분석

Analysis of the Variability and Correlation between Ground-Level Air Pollutant Concentrations and Atmospheric Mixing Layer Height based on Observations

김해리|이규영|정희정|박정민|신혜정|엄준식|김현경|이그림
한국기상학회 (Korean Meteorological Society)|2024.08|대기 (Atmosphere)|제34권 제3호|pp. 283-304|DOI 10.14191/Atmos.2024.34.3.283

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참고문헌

키워드

Correlation coefficientAtmospheric mixing layer heightGround-level air pollutant concentrationsSeasonal and hourly variability
주제분류대기과학

초록

This study analyzed the variability and correlation between ground-level air pollutant concentrations and the atmospheric mixing layer height using data from four types of air pollutants (PM2.5, PM10, NO2, and O3) collected at AirKorea monitoring stations nationwide over a five-year period (2018~2022), and aerosol backscatter data observed by the Vaisala CL31 to derive atmospheric mixing layer heights. The five-year trends and variability of ground-level air pollutant concentrations under seasonal and hourly conditions were examined, as well as the seasonal distribution and diurnal variation of the atmospheric mixing layer height. Five correlation coefficient methodologies were applied to analyze the correlations between ground-level air pollutants and atmospheric mixing layer height under various seasonal and hourly conditions, confirming the dilution effect of the atmospheric mixing layer height. The results showed that PM2.5, PM10, and NO2 generally had negative correlations with the atmospheric mixing layer height, while O3 showed a strong positive correlation up to an altitude of 1,200~1,500 meters, and a negative correlation beyond that altitude. It was also shown that a single high concentration event (e.g., PM10) can alter the overall correlation. The correlation can also vary depending on the characteristics of the correlation coefficient methodology, highlighting the importance of applying the appropriate methodology for each case during the analysis process.

Abstract

This study analyzed the variability and correlation between ground-level air pollutant concentrations and the atmospheric mixing layer height using data from four types of air pollutants (PM2.5, PM10, NO2, and O3) collected at AirKorea monitoring stations nationwide over a five-year period (2018~2022), and aerosol backscatter data observed by the Vaisala CL31 to derive atmospheric mixing layer heights. The five-year trends and variability of ground-level air pollutant concentrations under seasonal and hourly conditions were examined, as well as the seasonal distribution and diurnal variation of the atmospheric mixing layer height. Five correlation coefficient methodologies were applied to analyze the correlations between ground-level air pollutants and atmospheric mixing layer height under various seasonal and hourly conditions, confirming the dilution effect of the atmospheric mixing layer height. The results showed that PM2.5, PM10, and NO2 generally had negative correlations with the atmospheric mixing layer height, while O3 showed a strong positive correlation up to an altitude of 1,200~1,500 meters, and a negative correlation beyond that altitude. It was also shown that a single high concentration event (e.g., PM10) can alter the overall correlation. The correlation can also vary depending on the characteristics of the correlation coefficient methodology, highlighting the importance of applying the appropriate methodology for each case during the analysis process.

참고문헌 (55)

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