최근 20년간 서울지역 도시열섬과 대기오염물질의 장기변화 및 상관성 분석

• Published in: 한국대기환경학회지(국문) Vol. 40; no. 2; pp. 209 - 224
• Main Authors: 김진승(Jin-Seung Kim), 송상근(Sang-Keun Song), 이성빈(Sung-Bin Lee), 조성빈(Seong-Bin Cho)
• Format: Journal Article
• Language: Korean
• Published: 한국대기환경학회 01.04.2024
• Subjects: 대기과학; Air pollutants; Correlation analysis; Long-term variation; Urban heat island intensity; Seoul megacity
• ISSN: 1598-7132; 2383-5346
• DOI: 10.5572/KOSAE.2024.40.2.209

In this study, the long-term variations of urban heat island (UHI) and air pollutants were analyzed using air temperature and air quality data observed in urban and suburban areas of Seoul over the past 20 years (2001~2020). In addition, we investigated the relationships between UHI intensities and air pollutant concentrations during the study period. The UHI intensities, which were estimated using the mean and maximum temperature, showed a weak increasing trend (+0.006 and +0.067°C yr-1, respectively) during the study period. In contrast, the UHI intensity estimated using the minimum temperature showed a decreasing trend (-0.124°C yr-1) because the increase in minimum temperature was larger in suburban areas than in urban areas. The UHI intensity showed a continuously decreasing pattern when wind speed increased from 0 m s-1 to 4 m s-1, but little change was observed when wind speed exceeded 4 m s-1. Moreover, the long-term decreasing trend in primary air pollutants (e.g., CO, NO2, SO2, and PM10) was observed for 2001~2020, whereas the increasing trend in O3 concentrations. In correlation analysis, we found that most air pollutants (except for O3) showed positive correlations with UHI intensity during the study period (CO: +0.354, NO2: +0.415, SO2: +0.088, PM10: +0.118). At the same time, O3 was negatively correlated with UHI intensity (r=-0.450). For most air pollutants (except for O3), we also found stronger correlations at night than during the day. In addition, the concentrations of primary air pollutants tended to increase with increasing UHI intensities (i.e., increasing UHI levels), while O3 concentrations tended to decrease with increasing UHI levels, suggesting a potential interaction between UHI and air pollution. KCI Citation Count: 1